Application of advanced technology in the domestic large pipeline valve:all welded ball valve

Application of advanced technology in the domestic large pipeline valve

Overview
All rely on imports in the year 2000 China’s large-scale all-welded pipeline ball valves. Localization process of digestion, absorption and innovation through the use of modern advanced design techniques, such as reverse engineering, screening engineering, numerical analysis of finite element method, anti-breaking design, the design of anti-corrosion, low torque design and advanced manufacturing technology and technology and equipment, was a success.
Reverse engineering technology and its applications

The key technology of all-welded body pipeline ball valves (Figure 1) is the body welding, welding ball valve assembly is the last step, not heat-treated. Therefore, the development of free weld heat treatment after welding technology research, anti-Sum learn the foreign pipeline valve welding process with technology product localization shortcut. Continue reading “Application of advanced technology in the domestic large pipeline valve:all welded ball valve”

China Valve Industry

Valve oil, shipbuilding, nuclear industry, a variety of low-temperature projects, chemical, power station, long distance pipeline, aerospace and marine oil and other economic sectors indispensable fluid control equipment.

After years of development, China’s valve business volume ranks first in the world. There are about 6,000 up-scale enterprises totally, among them, there are 900 which annual output value over 500 million.

In china current valve market, in addition to low-pressure valve have achieve a level acceptable for the international market, the high-pressure valves still need to rely on imports. Thanks to continuous good macroeconomic situation, most production and sales targets  of valve industry are maintaining rapid growth, howover industry sales and profits dropped significantly over last year due to the price war. As the world economy revovery slowly, import and export of our valve products also increased gradually. Because of the high-end technology, compared with foreign manufacturers,there are still a wide gap in the next period of time. Product technology will be a bottleneck restriction of our valve products development.

In some opinion, China’s valve industry is now capable of producing more than a dozen categories of products, such as gate valve, globe valve, check valve, ball valve, butterfly valves, safety valve, relief valve, piston valves, plug valves, knife gate valve, slurry valve,  filter, foot valve, control valves, diaphragm valves, balance valve, solenoid valves, forged steel valves, needle valves, liquid level, flow meter, breather valve,  exhaust valve, flame arrester, instrument valves, copper valve, stainless steel valves, lined rubber lined valves, Pinch Valve,  power station valve, hydraulic control valve, vacuum valve, discharge valve, pneumatic angle seat valves,the U.S. standard valve, insulation valve, discharge valve, the maximum temperature reached 570 ℃, a minimum of -196 ℃, the maximum pressure of 600MPa, the maximum diameter to 5350 mm. In addition, according to the relevant departments of Statistics, China’s valve market turnover each year up to 500 billion yuan, of which more than 100 billion market take up by the foreign valve enterprises.

At present, China’s valve industry, there are still some problems, such as valve company in China are mainly low-level, small-scale, family-owned enterprises. About products, due to duplication of investment, technology transfer is not enough, the valve leading enterprise products in China is still low quality mass products. China’s production is currently widely impressed with following shortcomes,  leakage of various valves, internal leakage, the poor  appearance, short life, the operation is not flexible and electric valve actuators and pneumatic devices are not reliable, some of the products technology is only about 80s of the last century early international level, a number of high temperature and pressure and the critical need for the valve device is still rely on imports. Besides, A big gap between china and foreign is still existed in the industrial structure of China’s valve industry, valve industry, the industrial chain, and industry degree of specialization.

The reason of poor quality valve: the rapid market expansion, the original state-owned enterprises have been close, stop, merge,  transform, although a number of township enterprises developed rapidly, due to the low starting point of township enterprises, the technical power is very weak, poorly equipped , imitation products are mostly production, especially for the low pressure valve in water industry.

But the problem does not affect the future prospects of China’s valve industry wide. This is mainly due to the support of national policies and strong market demand for valve products, especially in several centuries, “natural gas”, “West to East”, “South” and started the project requires a large number of valve products supporting. In addition, China is faced with the arrival of the industrial age, the petrochemical industry, power industry, metallurgy industry, chemical industry and urban construction will push the use of large valve products. For example, the power industry,  coal units in large and medium-sized valves required for the project started was forecast totally:  153,000 tons valve, 30,600 tons in the average annual ; valve amount of the total demand of 39.6 billion with an annual demand amounted to 792 million yuan. In addition, China is becoming the world’s largest factory, manufacture for valve products with even greater space for development.

Thus, as long as companies can seize opportunities, strengthen research and development capabilities, and continuously improving product technology and product quality,  can have a bright future in the fierce market competition.

DIN valve standard(EN/ISO)-part2

DIN valve standard(EN/ISO)-part2

DIN 3535-1
Sealants for gas supplies; elastomeric gasket materials for gas valves in domestic installations; requirements and tests
DIN 3535-5
Rubber/cork and rubber/cork synthetic fiber based gasket materials for use with gas valves, gas appliances and gas pipe work
DIN 3535-6
Gaskets for gas supply – Part 6: Gasket materials based on synthetic fibers, graphite or polytetrafluoroethylen (PTFE) for gas valves, gas appliances and gas mains
DIN 3537-1
Gas stop valves rated for pressures up to 4 bar; requirements and acceptance testing
DIN 3543-1
Metal tapping valves; requirements, testing
DIN 3543-2
Metallic tapping stop valves; dimensions
DIN 3543-3, Publication date:1978-07
PVC tapping valves for plastic pipes; dimensions
DIN 3543-4
High density polyethylene (HDPE) tapping valves for HDPE pipes; dimensions
DIN 3544-1
High-density polyethylene (HDPE) valves; tapping valves; requirements and test
DIN 3852-1
Ports and stud ends with metric fine pitch thread, for use with compression couplings, valves and screw plugs; Dimensions
DIN 3852-2
Stud ends and tapped holes with pipe thread, for use with compression couplings, valves and screw plugs; Dimensions
DIN 3852-11
Stud ends and tapped holes for use with compression couplings, valves and screw plugs – Type E stud end dimensions
DIN 19208
Flow measurement; mating dimensions and application of shut-off valves for differential pressure transducers and differential pressure piping
DIN 19578-1
Stop valves for site drainage systems; anti-flooding valves for faucal sewage systems; requirements
DIN 20042
Water valve, nominal pressure 40 – Dimensions and requirements
DIN EN 28233
Thermoplastics valves; torques; test method (ISO 8233:1988)
DIN 30677-1
Corrosion protection of buried valves; coating for normal requirement
DIN 30677-2
External corrosion protection of buried valves; heavy-duty thermoset plastics coatings
DIN 32509
Hand-operated shut-off valves for welding, cutting and allied processes – Type of construction, safety requirements, tests
DIN 42560
Transformers; Throttle-valves NW 80, Dimensions, Tightness Testing
DIN 74279
Air braking systems – Charging valves
DIN 86251
Shut off valves for shipboard use, of cast iron, with flanges, DN 15 to 500
DIN 86252
Non return valves for shipboard use, cut off type, of cast iron, with flanges, DN 15 to 500
DIN 86260
Shut off valves for shipboard use, of gun metal, with flanges, DN 15 to 500
DIN 86261
Non return valves for shipboard use, cut off type, of gun metal, with flanges, DN 15 to 500
DIN 86501
Valves, screwed bonnet type of gun metal with 24???-connection with port end W according to DIN 3861
DIN 86528
Tab washers for screwed bonnet valves
DIN 86552
Valves, screwed bonnet type of steel with 24???-connection with port end W according to DIN 3861
DIN 86720
Gate valves flat sided of gun metal with screwed bonnet and flanges, DN 20 to DN 100, PN 16
DIN 87101, Publication date:2003-10
Non-return flaps (storm valves), self-closing, vertical type, DN 50 up to DN 150, PN 1 – Mating dimensions for flanges according to PN 10
DIN 87901
Sniffle valves for pumps
DIN EN 488
District heating pipes – Preinsulated bonded pipe systems for directly buried hot water networks – Steel valve assembly for steel service pipes, polyurethane thermal insulation and outer casing of polyethylene; German version EN 488:2003
DIN EN 558-1
Face-to-face and center-to-face dimensions of metal industrial valves for use in flanged pipe systems – PN designated valves
DIN EN 558-2
Face-to-face and center-to-face dimensions of metal industrial valves for use in flanged pipe systems – Class-designated valves
DIN EN 736-1
Valves – Terminology – Types of valves
DIN EN 736-2
Valves – Terminology – Part 2: Definition of components of valves
DIN EN 736-3
Valves – Terminology – Part 3: Definition of terms (includes Amendment A1:2001); English version of DIN EN 736-3:1999 + A1:2001
DIN EN 917
Plastics piping systems – Thermoplastics valves – Test methods for resistance to internal pressure and leak-tightness
DIN EN 1092-1
Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories – Part 1: Steel flanges, PN designated

DIN EN 1092-2
Circular flanges for pipes, valves, fittings and accessories, PN designated – Part 2: Cast iron flanges
DIN EN 1092-4
Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, PN designated – Part 4: Aluminium alloy flanges
DIN EN 1680
Plastics piping systems – Valves for polyethylene (PE) piping systems – Test method for leaktightness under and after bending applied to the operating mechanism
DIN EN 1705
Plastics piping systems – Thermoplastics valves – Test method for the integrity of a valve after an external blow; German version EN 1705:1996
DIN EN 28233
Thermoplastics valves; torques; test method (ISO 8233:1988)

DIN valve standard(EN/ISO)-part1

DIN valve standard(EN/ISO)-part1

DIN 475-1
Widths across flats for bolts, screws, valves and fittings
DIN 475-2
Wrench and socket openings
DIN 477-1
Gas cylinder valves rated for test pressures up to 300 bar; types, sizes and outlets
DIN 477-4
Compressed gas cylinder valves; swing check valves for camping-cylinders
DIN 477-5
Gas cylinder valves – Part 5: For test pressure up to 450 bar max.; Outlet connections
DIN 477-6
Gas cylinder valves; test pressures 300 bar and 450 bar, with cylindrical thread for valve stem and gas cylinder neck for breathing apparatus; sizes, threads
DIN 477-9 (Draft standard)
Gas cylinder valves, for highest grade gases; sizes, connections, threads
DIN 1690-10
Technical delivery conditions for castings of metallic materials; supplementary requirements for steel castings used for heavy-duty valves
DIN 3202-4
Face-to-face and center-to-face dimensions of valves; Valves with female thread connection
DIN 3202-5
Face-to-face and center-to-face dimensions of valves; valves for connection with compression couplings
DIN 3230-3
Technical delivery conditions for valves; Compilation of test methods
DIN 3230-4
Technical Conditions of Delivery for Valves; Valves for Potable Water Service, Requirements and Testing
DIN 3230-5
Technical delivery conditions; valves for gas installations and gas pipelines; requirements and testing
DIN 3230-6
Technical delivery conditions for valves; requirements and methods of test for valves for use with flammable liquids
DIN 3266-1
Valves for drinking water installations on private premises; PN 10 pipe interrupters, pipe disconnectors, anti-vacuum valves
DIN 3266-2
Valves for drinking water installations on private premises; PN 10 pipe interrupters, pipe disconnectors, anti-vacuum valves; testing
DIN 3320-1
Safety valves; safety shut-off valves; definitions, sizing, marking
DIN 3320-3 (Draft standard)
Safety valves; safety shut-off valves; center for face dimensions of flanged safety valves to PN 40 and to DN 250 inlet
DIN 3339
Valves; body component materials
DIN 3352-1
Gate Valves; General Information
DIN 3352-2
Cast iron gate valves, with metallic seat and inside screw stem
DIN 3352-3
Cast iron gate valves, with metallic seat and outside screw stem
DIN 3352-4
Cast iron gate valves with elastomeric obturator seatings and inside screw stem
DIN 3352-5
Steel gate valves, isomorphs series
DIN 3352-13
Double-socket cast iron gate valves, with elastomeric obturator seat and inside screw stem
DIN 3356-1
Globe valves; General data
DIN 3356-2
Globe valves; Cast iron stop valves
DIN 3356-3
Globe valves; Unalloyed steel stop valves
DIN 3356-4
Globe valves; High temperature steel stop valves
DIN 3356-5
Globe valves; Stainless steel stop valves
DIN 3357-1
Metal ball valves; general requirements and methods of test
DIN 3357-2
Full bore steel ball valves
DIN 3357-3
Reduced bore steel ball valves
DIN 3357-4
Full bore nonferrous metal ball valves
DIN 3357-5
Reduced bore nonferrous metal ball valves
DIN 3381
Safety devices for gas supply installations operating at working pressures up to 100 bar; pressure relief governors and safety shut-off devices
DIN 3399
Gas low-pressure cut-off valves; safety requirements, testing
DIN 3441-1
Unplasticized polyvinyl chloride (PVC-U) valves; requirements and testing
DIN 3441-2
Unplasticized polyvinyl chloride (PVC-U) valves; ball valves; dimensions
DIN 3441-3
Unplasticized polyvinyl chloride (PVC-U) valves; diaphragm valves; dimensions
DIN 3441-4
Valves of Rigid PVC (Unplasticized or Rigid Polyvinyl Chloride); Y-valves (Inclined-seat Valves), Dimensions
DIN 3441-5
Unplasticized polyvinyl chloride (PVC-U) valves; PN 6 and PN 10 wafer type butterfly valves; dimensions
DIN 3441-6
Unplasticized polyvinyl chloride (UPVC) valves; gate valves with inside screw stem; dimensions
DIN 3442-1
Polypropylene (PP) valves; requirements and testing
DIN 3442-2
Fittings of PP (Polypropylene); Ball valves, Dimensions
DIN 3442-3
Polypropylene (PP) valves; diaphragm valves; dimensions
DIN 3475
Spheroidal graphite cast iron valves and fittings provided with internal corrosion protection by means of enamelling, for use in drinking water supply systems; requirements and testing
DIN 3476
Corrosion protection of water valves and pipe fittings by epoxy powder or liquid epoxy resin linings – Requirements and testing
DIN 3500
PN 10 piston type gate valves for use in drinking water supply systems
DIN 3502
Stopvalves for drinking water supplies on and in private property; straight pattern globe valves with oblique bonnet, rated for nominal pressure PN 10
DIN 3512
Stopvalves for domestic water supply – Two-way valves – Vertical bonnet type PN 10; Straight pattern globe valve; Technical rule of the DVGW

BS Valve Standard(EN/ISO)-part2

BS Valve Standards( EN ISO)-part2

BS 4062-1:1982
Valves for hydraulic fluid power systems – Methods for determining pressure differential/flow characteristics
BS 4062-2:1990
Valves for hydraulic fluid power systems – Methods for determining performance
BS4090:1966
Cast iron check valves for general purposes
BS4133:1967
Flanged steel parallel slide valves for general purposes
BS4312:1968
Flanged steel screw down stop valves and check valves for general purposes                BS ISO 4401:1996                                                                                                      Hydraulic fluid power – Four-port directional control valves – Mounting surfaces                BS 4460:1969                                                                                                                    Steel ball valves for the petroleum industry

BS 5041:1987
Fire hydrant systems equipment – Specification for landing valves for wet risers
BS 5146 P1:1984
Steel valves for the petrochemical and allied industries
BS 5150:1990 – Withdrawn, Superseded
Specification for cast iron gate valves
BS 5151:1982 – Withdrawn, Superseded
Specification for cast iron gate (parallel slide) valves for general purposes
BS 5152:1989 – Withdrawn, Superseded
Cast iron globe & globe stop and check valves
BS 5153:1989 – Withdrawn, Superseded
Cast iron check valves for general purposes
BS 5154:1991
Specification for copper alloy globe, globe stop and check, check and gate valves
BS 5155:1992
Specification for butterfly valves
BS 5156:1990
Specification for diaphragm valves
BS 5157:1989
Specification for steel gate (parallel slide) valves
BS 5158:1989
Specification for cast iron plug valves
BS 5159:1982
Cast iron and carbon steel ball valves for general purposes
BS 5160:1989
Specification for steel globe valves, globe stop and check valves and lift type check valves
BS 5163:1991
Specification for predominantly key-operated cast iron gate valves for waterworks purposes                                                                                                                                    BS EN ISO 5210:1996                                                                                                 Industrial valves – Multi-turn valve actuator attachments                                                     BS 5351:1990                                                                                                                    Steel ball valves for petroleum, petrochemical and allied industries                                    BS 5352:1990                                                                                                                   Steel wedge gate, globe and check valves 50mm and small

BS 5353:1989
Specification for steel plug valves
BS 5417:1976
Testing of general purpose industrial valves
BS 5418:1984
Specification for marking of general purpose industrial valves
BS 5672:1991
Specification for designation of the direction of retation and of cylinders and valves in cylinder heads, and definition of right-hand and left-hand in-line engines and locations on engines for reciprocating internal combustion engines
BS 5793-4:1987
Industrial-process control valves – Specification for inspection and routine testing
BS 5793-6:1986
Industrial-process control valves – Specification for mounting details for attachment of positioners to control valve actuators
BS 5834-1:1985
Surface boxes, guards and underground chambers for gas and waterworks purposes – Specification for guards, including foundation units
BS 5834-2:1983
Surface boxes, guards and underground chambers for gas and waterworks purposes – Specification for small surface boxes
BS 5834-3:1985
Surface boxes, guards and underground chambers for gas and waterworks purposes – Specification for large surface boxes
BS 5834-4:1989
Surface boxes, guards and underground chambers for gas and waterworks purposes – Specification for preformed chambers
BS 5995:1980
Methods of test for electrohydraulic servovalves

BS ISO 6263:1997
Hydraulic fluid power – Compensated flow-control valves – Mounting surfaces
BS 6282-2:1982
Devices with moving parts for the prevention of contamination of water by backflow – Specification for check valves of nominal size up to and including DN 54
BS 6282-3:1982
Devices with moving parts for the prevention of contamination of water by backflow – Specification for in-line anti-vacuum valves of nominal size up to and including DN 42
BS 6282-4:1982
Devices with moving parts for the prevention of contamination of water by backflow – Specification for combined check and anti-vacuum valves of nominal size up to and including DN 42
BS 6283-2:1991
Safety and control devices for use in hot water systems – Specifications for temperature relief valves for pressures from 1 bar to 10 bar
BS 6283-4:1991
Safety and control devices for use in hot water systems – Specification for drop-tight pressure reducing valves of nominal size up to and including DN 50 for supply pressures up to and including 12 bar
BS 6494-4:1989
Hydraulic fluid power valve mounting surfaces – Specification for clamping dimensions of four-part, size 03 and 05, modular stack valves and directional control valves
BS 6675:1986
Specification for servicing valves (copper alloy) for water services
BS 6683:1985
Guide to installation and use of valves
BS 6697:1986
Methods of test for electrohydraulic proportional control valves
BS 6755-2:1987
Testing of valves – Specification for fire type-testing requirements
BS 6759-1:1995
Safety valves – Part 1. Specification for safety valves for steam and hot water
BS 6759-2:1997
Safety valves – Part 2. Safety valves for compressed air or inert gas
BS 6759-3:1995
Safety valves – Part 3. Specification for safety valves for process fluids
BS 6821:1988
Methods for aerodynamic testing of dampers and valves

BS 7296-1:1990
Cavities for hydraulic fluid power cartridge valves – specification for two-port slip-in valves
BS 7350:1990
Specification for double regulating globe valves and flow measurement devices for heating and chilled water systems
BS 7389-1:1990
Pneumatic fluid power valve mounting surfaces – specification for five-port directional control valves (without electrical motor)
BS 7438:1991
Specification steel and copper alloy waffer check valves, single disk, spring-loaded type

BS EN 12119:1997
Plastics piping systems – Polyethylene (PE) valves – Test method for resistance to thermal cycling
BS EN 14141:2003
Valves for natural gas transportation in pipelines – Performance requirements and tests
BS EN 14189:2003
Transportable gas cylinders. Inspection and maintenance of cylinder valves at time of periodic inspection of gas cylinders. Partially replaces BS 341-1:1991

BS EN 28233:1992
Thermoplastics valves – Torque – Test method
BS EN 28659:1992
Thermoplastics valves – Fatigue strength – Test method

BS EN 60534-1:1989
Industrial-process control valves – Industrial-process control valves – Control valve terminology and general considerations
BS EN 60534-2-1:1999
Industrial-process control valves – Flow capacity – Flow capacity – Sizing equations for fluid flow under installed conditions
BS EN 60534-2-3:1998
Industrial-process control valves – Flow capacity – Test procedures
BS EN 60534-2-5:2003
Industrial-process control valves – Flow capacity – Sizing equations for fluid flow through multistage control valves with interstage recovery
BS EN 60534-3-1:2000
Industrial-process control valves – Dimensions – Face-to-face dimensions for flanged, two-way, globe-type, straight pattern and centre-to-face dimensions for flanged, two-way, globe-type, angle pattern control valves
BS EN 60534-3-2:2001
Industrial-process control valves – Dimensions – Face-to-face dimensions for rotary control valves except butterfly valves
BS EN 60534-3-3:1998
Industrial-process control valves – Dimensions – End-to-end dimensions for buttweld, two-way, globe-type, straight pattern control valves
BS EN 60534-5:2004
Industrial-process control valves – Marking
BS EN 60534-6-1:1998
Industrial-process control valves – Mounting details for attachment of positioners to control valves – Positioner mounting on linear actuators
BS EN 60534-6-2:2001
Industrial-process control valves – Mounting details for attachment of positioners to control valves – Positioner mounting on rotary actuators
BS EN 60534-8-1:2001
Industrial-process control valves – Noise considerations – Laboratory measurement of noise generated by aerodynamic flow through control valves
BS EN 60534-8-2:1991
Industrial-process control valves – Noise considerations – Laboratory measurement of noise generated by hydrodynamic flow through control valves
BS EN 60534-8-3:2000
Industrial-process control valves – Noise considerations – Control valve aerodynamic noise prediction method
BS EN 60534-8-4:1994
Industrial-process control valves – Noise considerations – Prediction of noise generated by hydrodynamic flow
BS EN 60730-2-8:2002
Specification for automatic electrical controls for household and similar use – Particular requirements – Particular requirements for electrically operated water valves, including mechanical requirements

BS Valve Standard(EN/ISO)-part1

BS Valve Standards( EN ISO)-part1

BS 341-1:1991
Transportable gas container valves. Specification for industrial valves for working pressures up to and including 300 bar (REPLACED by BS EN 14189:2003) , BS 341-3:2002) , BS EN 849:1997) , BS EN ISO 13340:2001) , BS EN ISO 14246:2001) , BS 341-4:2004)
BS 341-2:1963
Transportable Gas Container Valves. Valves with Taper Stems for Use with Breathing Apparatus. (REPLACED by BS 341-1:1991) , BS EN 849:1997) , BS EN ISO 12209-1:2001) , BS EN ISO 12209-2:2001) , BS EN ISO 12209-3:2001)
BS 341-3:2002
Transportable gas container valves. Valve outlet connections
BS 341-4:2004
Transportable gas container valves. Pressure relief devices
BS EN 488:2003
District heating pipes – Preinsulated bonded pipe systems for directly buried hot water networks – Steel valve assembly for steel service pipes, polyurethane thermal insulation and outer casing of polyethylene
BS EN 558-1:1996
Industrial values face to face and center to face dimensions of metal valves for use in flanged pipe systems. Part 1 PN designated valvesBS
EN 558-2:1996
Industrial valves face to face and center to face dimensions of metal valves for use in flanged piping systems. Part 2 class-designated valves
BS EN 561:2002
Gas welding equipment – Quick-action coupling with shut-off valves for welding, cutting and allied processes
BS EN 736-1:1995
Valves – Terminology – Definition of types of valves
BS EN 736-2:1997
BS 759-1:1984
Valves, gauges and other safety fittings for application to boilers and to piping installations for and in connection with boilers. Specification for valves, mountings and fittings
Valves – Terminology – Definition of components of valves
BS EN 816:1997
Sanitary tapware – Automatic shut-off valves PN 10
BS EN 917:1997
Plastics piping systems – Thermoplastics valves – Test methods for resistance to internal pressure and leaktightness

BS EN 1092-2:1997
Flanges and their joints – Circular flanges for pipes, valves, fittings and accessories, PN designated – Cast iron flanges
BS EN 1112:1997
Shower outlets for (PN 10) sanitary tapware
BS 1123-1:1990
Safety valves, gauges and fusible plugs for compressed air or inert gas installations – Code of practice for installation
BS 1212-1:1990
Float operated valves – Specification for piston type float operated valves (copper alloy body) (excluding floats)
BS 1212-1:1990
Float operated valves – Specification for piston type float operated valves (copper alloy body) (excluding floats)
BS 1212-3:1990
Float operated valves – Specification for diaphragm type float operated valves (plastics bodied) for cold water services only (excluding floats)
BS 1212-4:1990
Float operated valves – Specification for compact type float operated valves for WC flushing cisterns (including floats)
BS 1552:2004
Specification for open bottomed taper plug valves for 1st, 2nd and 3rd family gases up to 200 mbar
BS 1570:1960
Flanged and but weld-welding end steel plug valves for the petroleum industry (excluding well -head and flow-line valves)
BS1655:1976
Flanged automatic control valves for the process control industry (face to face dimensions)
BS EN 1680:1997
Plastics piping systems – Valves for polyethylene (PE) piping systems – Test method for leaktightness under and after bending applied to the operating mechanism
BS EN 1704:1997
Plastics piping systems – Thermoplastics valves – Test method for the integrity of a valve after temperature cycling under bending
BS EN 1705:1997
Plastics piping systems – Thermoplastics valves – Test method for the integrity of a valve after an external blow
BS 1735:1966
Flanged cast iron outside-screw-and-yoke wedge gate valve, class 125, sizes 1 1/3 in to 24 in, for the petroleum industry
BS 1868:1975
Specification for steel check valves (flanged and butt-welding ends) for the petroleum, petrochemical and allied industries
BS 1873:1975
Specification for steel globe and globe stop and check valves (flanged and butt-welding ends) for the petroleum, petrochemical and allied industries
BS1952:2000
Copper alloy valves for general purposes
BS1953:2000
Copper alloy check valves for general purposes
BS1963:1990
Specification for pressure operated relay valves for domestic, commercial and catering gas appliances
BS 1968:1953
Specification for floats for ball valves (copper)

BS2060:2000
Copper alloy screw down stop valves for general purposes
BS2080:1995
Specification for face to face, center to face, end to end and center to end dimensions of valves
BS 2456:1990
Specification for floats (plastics) for float operated valves for cold water services
BS 2879:1980
Specification for draining taps (screw-down pattern)
BS2995:1966
Cast and forged steel wedge gate, globe, check and plug valve, screwed and socket welding, sizes 2 in and smaller, for the petroleum industry

BS 3457:1973
Specification for materials for water tap and stop valve seat washers
BS 3464:2000
Cast iron wedge and double disk gate valves for general purposes
BS3808:1964
Cast and forged steel flanged, screwed and socket welding wedge gate valves (compact design), sizes 2 in and smaller, for the petroleum industry
BS3948:1965
Cast iron parallel slide valves for general purposes
BS3952:1965
Cast iron butterfly valves for general purposes
BS3961:1965
Cast iron screw down stop valves and stop and check valves for general purposes

High performance Butterfly valve

High performace butterfly valve is just a adjective, never a noun most people used for.Let’s start with what is a butterfly valve? A butterfly valve is from a family of valves called quarter turn valves. It’s name is come from butterfly type structure. The “butterfly” is a metal disc (normal, though now we have plastic valve or other non metal material valve)mounted on a rod. When the valve is closed, the disc is turned so that it completely blocks off the passageway. When the valve is open, the disc is rotated a quarter turn so that it allows unrestricted passage. The position of the disc is effected from outside the valve.

Butterfly valves are generally favored because they are lower in cost to other valve designs as well as being lighter in weight, meaning less support is required. The disc is positioned in the center of the pipe, passing through the disc is a rod connected to an actuator on the outside of the valve. Rotating the actuator turns the disc either parallel or perpendicular to the flow.

There are different kinds of butterfly valves, each adapted for different pressures and different usage. SGV, from china, divided mainly two kinds of valve.The resilient butterfly valve, which uses the flexibility of rubber or Tefelon ,PFA, NYLON, has the lowest pressure rating. They are usually center disc design. Typically used for low pressure, normal temeprature condition.

Usually, the other type is metal seated butterfly valve, often appear with double eccentric design or triple offset design. It is developed from tradional center line butterfly valve. Somebody call it high performance butterfly valve, used in slightly higher-pressure systems, features a slight offset in the way the disc is positioned, which increases the valve’s sealing ability and decreases its tendency to wear. The valve best suited for high-pressure systems is the tricentric butterfly valve, which makes use of a metal seat, and is therefore able to withstand a greater amount of pressure, high temperature, corrosive and aggressive chemicals. So-called “High Performance” butterfly valves which offer zero leakage designs and have been applied in both the chemicals and hydrocarbon processing sectors.

Butr some valve manufacturer or supplier also call eccentric PTFE or RPTFE seat butterfly valve as high performance butterfly valve.Like Nibco from American, www.nibco.com

Also there are many other Europe or america butterfly manufacturer and supplier has their own description or definition for high performance butterfly valve.

CRANE from American www.craneco.com

Masoneilan* High Performance Butterfly Control Valves from GE energy , www.ge-energy.com
The high performance butterfly valve delivers heavy-duty, automatic throttling control flow for applications involving large flow rates and moderate pressure drops. It incorporates the two basic features of the high performance butterfly valve types: a PTFE, RTFE, or metal seal ring instead of a liner and double offset (eccentric operation) to reduce seal friction and operating torque and provide superior performance compared to conventional butterfly valves.

High Performance Butterfly Control Valves from GWC Valve International, Inc. www.gwcvalve.com
GWC Double Offset High Performance Butterfly valves are designed for shutoff and throttling control of liquids and gas.

EBRO-armaturen from German
Wafer type butterfly valve in double-eccentric construction. Reliable sealing even with extreme temperature and pressure conditions.

ADMAS triple eccentric butterfly valve from German www.ad mas-armaturen.de
The first triple eccentric metal seat butterfly valve manufacturer.

Usually these words are used for to descript high performance butterfly valve:High performance, low friction, low torque, metal seat(sometimes PTFE or RPTFE seat), eccentric design, long service life, suitable for aggressive condition, high cost performance, bi-directional. There is no words to digital or data to definie what is a high performance butterfly valve. It is no apparent differences between high performance butterfly valve and normal metal eccentric butterfly valve.

So is there any diferences between high performance butterfly valve and normal metal eccentric butterfly valve?  Usuallly high performance butterfly valve is machined by CNC machine with high accurancy, especially some trim parts. It require better quality control and material class. Many valve experts think the valve should reach some degree service life. For example, pass 1 million times open close service life test.

In a word, high performance butterfly valve is a word people descrip valve with very good quality for high requirement application.

 

 

Tilting disc swing check valve

The tilting-disc swing check valve is another variant of the basic type of check valve. In these valves, the disc swings partly through the seat. The geometry for sealing and avoiding jamming is more complicated than for other swing checks. One variety pivots the disc in the seat area – but somewhat off-center. This means that the zones around the pivot are more difficult to seal, analogous to the problem of the symmetrical butterfly valve. The disc is nearly balanced, reducing slamming. Seal material is basically Buna-N, but Viton, Teflon, and even monel are possible. The valve is a very short wafter type, so the open disc protrudes beyond the body.
Tilting-disc valves with the pivot outside the seating area are available in many forms. The geometry of the pivot location and angle of the seating surfaces allows the disc to lift away from the seat at all points and prevents the disc from becoming wedged so tightly in the seat that it cannot move. Extreme and sudden temperature changes and differentials get close consideration in this. The disc and seat may be likened to a slice from a bottle stopper, made at an oblique angle to the cone axis to allow the “stopper” to be removed by a twist about the pivot downstream. The machining of the oval seat ring and disc in this valve requires skill. In some instances, the cone is cut at right angles, but location of the pivot downstream and above the valve axis permits the top of the disc to swing through the seat.
In some tilting-disc check valves, the disc has a slight clearance on the pivot, to help assure a tight seat. In other tilting-disc vales, the heavy pivot shaft is rigidly attached to the disc and supported in close-clearance bearings. The pivot shaft is generally large-diameter in tilting-disc valves, so attachment of dashpots, indicators, and limit switches is easy.
Because of the partial balance of the disc, the fluid-dynamic characteristics of the disc are important. The forward-flowing fluid must open the disc easily, and then hold it open with little flutter. When flow slows and stops, the disc must close quickly and silently. Several tilting discs have curved undersurfaces to develop fluid-dynamic forces. One variety has a flap above the main disc, which also serves to limit disc opening, removing a load from the main disc.
Access to the internals of some tilting-disc check valves, when they are mounted in the line, is through conventional bonnets or removable plates. The internals of other models are inaccessible, because the valve body is of the wafer or short-spool type. In general, valves that must be welded into the line tend to resemble the standard types of checks, with welds at a safe distance from the seat. One line of tilting-disc checks has obliquely split bodies for pressure classes to 1500 ANSI, but is a wafer body between weld-end flanges in higher-pressure classes.
SGV Tilting Disc Check Valves consist of a cylindrical housing, with a pivoted circular disc. The pivots are located just above the center of the disc, and offset from the plane of the body seat. This design gives a bell-crank action to the disc. The seat is of circular bevel type and the disc drops in or out of contact without rubbing or sliding.It is mounted at the outlet pipeline of the pressurized output water pump in industrial (and urban) water supply and drainage system,high-rises, sewage discharge, hotel and restaurants, functioned to cut off the backflow of medium and eliminate destructive water hammer.
Featured by small volume, lightweight, Low head loss ,easy installation, Energy efficient, little occupation of space, saver if time and labor for servicing and maintenance, and etc., this valve is an optimal solution for water supply and drainage products

Contact Sangong for more information

API 600 Bolted Bonnet Steel Gate Valves for Petroleum and Natural Gas Industries,ISO10434,BS1414 Gate valve

API 600 Bolted Bonnet Steel Gate Valves for Petroleum and Natural Gas Industries
API Standard 600, Eleventh Edition , October 2001
ISO 10434 Gate Valves: 1998 ( BS1414 Gate Valves)
ANSI/API Std 600-2001

Contents Included

Introduction, Scope, Normative references, Definitions, Pressure/temperature ratings, Design, Body wall thickness,Bonnet wall thickness , Body dimensions, Flanged, Butt-welding ends, Body seats, Openings, Bonnet dimensions, Bonnet-to-body joint, Gate, Yoke, Stem and stem nut, Packing and packing box, Bolting, Operation, Auxiliary connections, Materials, Materials other than trim materials, Trim, Repair, Testing, inspection and examination, Pressure tests, Shell test, Closure tightness test , Backseat test, Optional closure tightness test, Inspection, At the valve manufacturer’s factory, Other than at the valve manufacturer’s factory, Extent of inspection, Examination, Supplementary examination, Marking, Legibility, Body markings, Ring joint markings, Identification plate marking, Preparation for despatch

Bolted bonnet steel gate valves for petroleum and natural gas industries
1 Scope
This International Standard specifies the requirements for a heavy duty series of bolted bonnet steel gate valves for petroleum refinery and related applications where corrosion, erosion and other service conditions indicate a need for full port openings, heavy wall sections and extra large stem diameters.
This specification sets forth the requirements for the following gate valve features:
— bolted bonnet;
— outside screw and yoke;
— rising stems;
— non-rising handwheels;
— single or double gate;
— wedge or parallel seating;
— metallic seating surfaces;
— flanged or butt-welding ends.
It covers valves of the nominal sizes DN:
25; 32; 40; 50; 65; 80; 100; 150; 200; 250; 300; 350; 400; 450; 500; 600
and is applicable for pressure designations PN:
20; 50; 110; 150; 260; 420
when metric sized bolt holes are provided in end flanges and PN designations are marked on the valve body.
It also covers valves of the corresponding nominal pipe sizes NPS:
1; 11/4; 11/2; 2; 21/2; 3; 4; 6; 8; 10; 12; 14; 16; 18; 20; 24
and applies for equivalent nominal Class ratings:
150; 300; 600; 900; 1500; 2500
when inch-sized bolt holes are provided in end flanges and Class designations are marked on the valve body.It also covers additional marking requirements for valves that are PN (or Class) designated but have flanges drilled for inch (or metric) bolt holes.

2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this International
Standard. At the time of the publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.
ISO 7-1:1994,Pipe threads where pressure-tight joints are made on the threads—Part 1: Dimensions, tolerances and designation.
ISO 4200:1991,Plain end steel tubes, welded and seamless—Dimensions.                    ISO 5208:1993,Industrial valves—Pressure testing of valves.                                           ISO 5209:1977,General purpose industrial valves—Marking.

ISO 5210:1991,Industrial valves—Multi-turn valve actuator attachments.
ISO 5752:—1),Metal valves for use in flanged pipe systems—Face-to-face and centre-to-face dimensions.
ISO 6708:1995,Pipework components — Definition and selection of DN (nominal size).
ISO 7005-1:1992,Metallic flanges — Part 1: Steel flanges.
ISO 7268:1983,Pipe components — Definition of nominal pressure.
ASME B1.1:1989,Unified inch screw threads (UN and UNR thread form).
ASME B1.5:1988 (R1994),Acme screw threads.
ASME B1.8:1988 (R1994),Stub Acme screw threads.
ASME B1.12:1987 (R1992),Screw threads — Class 5 interference — Fit thread.
ASME B1.20.1:1983 (R1992),Pipe threads, general purpose (inch).
ASME B16.5:1996,Pipe flanges and flanged fittings.
ASME B16.34:1996,Valves — Flanged, threaded and welding end.
ASME B18.2.2:1987 (R1993),Square and hex nuts (inch series).
ASTM A193:1996,Specification for alloy steel and stainless steel bolting materials for high-temperature service.
ASTM A194:1996,Specification for carbon and alloy steel nuts for bolts for high-pressure and high-temperature service.
ASTM A307:1994,Specification for carbon steel bolts and studs, 60 000 psi tensile strength.
MSS SP-55:1985 (R1990),Quality standard for steel castings, visual surface examination.

API Standard 600/ISO 10434:1998  American Petroleum Institute———————————

If you have any quesiton or enquiry about API600 gate valves, feel free contact Sangong team with info@sangongvalve.com.   SGV also offer special API603 cast stainless steel gate valve.

Application of Plastic Valve in Industrial Piping

Application of Plastic Valve in Industrial Piping and Requirements

The advantages of using plastics are constantly being discovered. Over the past few years, there has been a dramatic increase in the application of plastic valves and piping systems in areas where metal valves were thought to be the only solution. So plastic or metal? It should consider valve base seal test, valve seal test, valve strength test, long term valve test, fatigue test and operating torque test by using reasoble method and standard, to compare cost performance of plastic valve and metal valve.

There are many types of plastic valves.Include Ball valves,Butterfly valves,Needle valves,Drain valves, Float valves, Gate valves, Globe va lves, knife valves (similar structure with gate), pinch valves,  Check valves, Poppet valves, Plug or stop-cock valves, Diaphragm valves, Directional valves , Diverter valves. Other types of plastic valves include shut off valves, solenoid valves, sanitar valves or hygienic valves, sampling or dispensing valves,  and toggle valves.

Selecting plastic valves requires an analysis of performance specifications, actuation methods, and connection types.

Performance specifications include valve size, pressure rating, number of ports or ways, media temperature, and valve flow coefficient. Suppliers specify valves according to metric or English (imperial) measurements.

Some plastic valves are actuated manually, by a hand wheel or crank, or with mechanical devices such floats and cams. Others are actuated by electric, pneumatic, electro-hydraulic, or electro-hydraulic methods.

Connection types for plastic valves can be many. Examples include compression fittings, bolt flanges, clamp flanges, union connections, tube fittings, butt welds, and socket welds. Plastic valves with internal or external threads for inlet or outlet connections are also available.

Nowadays Plastic valves are been used for following application:powders, rendering wastes, sludge, slurry, ash slurry, coolants, hazardous materials, liquid metal,wastewater, gasoline, diesel fuel, lubricants, air and compressed air, hot and cold water, salt water,high viscosity fluids, hydraulic fluid liquefied petroleum gas (LPG), natural gas, abrasive materials, acids, and adhesives.

Back to Sangong