Industrial Valves Blog
Spring return ball valve only needs to rotate 90 degrees of operation and a very small moment of rotation to connect the flow of media, loosen the handle of the ball valve, and automatically rebound under the action of the spring reset.
Spring return lever ball valve Continue reading “API 6D Stainless steel/Carbon steel Spring Return Deadman Lever Operated Ball Valve”
Ball valve
The ball valve is evolved from the cock valve. Its opening and closing part is a sphere, which rotates 90 degrees around the axis of the valve stem to achieve the purpose of opening and closing. Ball valve is mainly used to cut off, distribute and change the direction of medium flow in pipeline. The ball valve with V-shaped opening also has good flow regulation function.
Continue reading “Advantages and Disadvantages of Ball Valves”
Thermal insulation valve
Insulation valves take good insulation measures for a large number of valves in industrial production, which can not only achieve good energy-saving effect, but also improve the safety and reliability of valves and prolong the service life of valves.
The insulation valve has good insulation and cooling characteristics, and the diameter of the valve is the same as the diameter of the pipe. At the same time, it can effectively reduce the loss of medium heat in the pipeline. It has good heat preservation and cooling characteristics, and can effectively reduce the heat loss of medium in the pipeline. Continue reading “Thermal insulation valves: ball valves feature, principal, installation,advantageous”
Metal seal Ball valve sealing surface hardening techniques
First, Overview
High-viscosity fluids in power plants , petrochemical systems , coal chemical industry , with dust mixed fluid and solid granular , highly corrosive fluid medium and so on required the ball valve should be metal seal , so the choice of a suitable metal hard sealing ball valve “ball and seat” hardening process is very important.
Second, the usual hardening process are the following :
( 1 ) sphere surfacing deposit weld alloy , hardness usually up to 30HRC or more, spheres surfacing process is complex, low productivity, and a large area of surface welding easy to make parts deformation , as a reslut, currently use of the sphere surface hardening process become less .
Continue reading “Metal seal Ball Valve sealing surface hardening technique”
A lot of 3 pieces forged steel Ball Valve pass the test and ready for deliver In Dec 11th, 2013.
Part1: DN100 PN160 ball valve with Trunion ball and Full bore, 316 body with 316 Ball tungsten carbide and metal seat pass the test of body pressure 243bar water pressure and 180bar water high pressure test. The air test was under 24bar(higher than the requirement, to adjust the quality level of ball valves)
Inspection standard:EN12266-1
Part 2: 3″ 1500lb API6D 316L body forged ball valve complete the assembly and ready for pressure test.
Part3 other butt weld forged valves, include forged gate valve and forged check valve
Classification
The ball valves is divided into floating ball valve and trunnion ball valve according to the ball support in the bottom trunnion or seat.
The ball valves is divided into metal seal ball valve and soft seal ball valve according to the surface of sealing material.
The ball valves is divided into top entry, side entry and full welded body type according to the body structure.
The ball valves is divided into 1 pc, 2pcs, 3pcs body in side entry ball valve
Usage and feature
Usage
Series floating ball valve and trunnion type ball valve are used in oilfield, chemical-industrial, power-station for cutting and connecting the pipe.
|
Nominal pressure |
Strength testing pressure |
High-pressure Sealing testing Pressure |
Low-pressure Sealing testing Pressure |
Temperature Range |
Applicable medium |
|
150Lb |
3.0Mpa |
2.2MPa |
0.6MPa |
≤180°C |
Water ,oil, Gas |
|
300Lb |
7.5Mpa |
5.5Mpa |
|||
|
600Lb |
15.0Mpa |
11.0Mpa |
|||
|
900Lb |
22Mpa |
17.6Mpa |
|||
|
1500Lb |
37.5Mpa |
27.5 Mpa |
Working theory and configuration direction
1. Series gate valve are designed and made under standard API 6D tested under standard API598.
2. Handle moving clockwise by 90 will close the pore of ball is vertical of the pipe and cut it. As anti-clock will connect the pipe. Continue reading “Ball Valves Installation, Operation And Maintenance Manual”
VALVE TYPE SPECIFICATIONS
1 BALL VALVES
Ball valves shall be provided with the following:
• Lockable device (opened and closed).
• Blow-out proof stem.
• Split body design.
• Anti static device tested in accordance with ISO 17292 or API 6D as applicable.
• Trunnion mounted ball valves shall have a cavity relief seat.
• Suitable for bi-directional use.
• Ball shall be solid. Hollow ball is subject to MISC/MMHE approval.
• Ball position indicator.
Floating ball valves are acceptable up to 6” in class 150 and 300, 3” in class 600. Continue reading “VALVE TYPE SPECIFICATIONS/GEAR REQUIREMENT-ball,gate,globe,check,butterfly valve”
Válvula de esfera flotante
Una válvula con la bola flotante (no fijo por un muñón ) en el interior del cuerpo de la válvula se denomina como válvula de bola flotante, se deriva hacia el lado de aguas abajo y empuja fuertemente contra el asiento bajo la presión del medio para asegurar la fiabilidad de sellado. Se ha estructura simple, el rendimiento del sellado bueno, se utiliza generalmente en aplicaciones de presión media o baja.
Tamaño: NPS 1/2 “~ 10” DN15 ~ DN250
Grado de la presión: Clase 150 ~ 600 ~ PN16 PN100
Conexión: RF, BW, RTJ, SW, etc
Material: CS, SS, aleación y así sucesivamente
Diseño y fabricación: API 6D, ASME B16.34 (BS5351), API 608, MSS-SP-72
Prueba e inspección: API 598, API 6D
Face To Face Dimension: ASME B16.10, API 6D
Brida de conexión Dimensiones: ASME B16.5
BW Dimensión de conexión: ASME B16.25
Prueba de fuego de diseño: API 607/6FA
Diseño Reportaje:
Una válvula de bola flotante es una válvula con la bola flotante (no fijo por un muñón) en el interior del cuerpo de la válvula, que se desplaza hacia el lado de aguas abajo y empuja fuertemente contra el asiento bajo la presión del medio para asegurar la fiabilidad de sellado. Continue reading “Válvula de esfera flotante-floating ball valve”
8.1 Valves shall comply with the relevant standards and codes as specified herein and in the valve data sheets.
2 Ball Valves
All ball valves shall be of a fire tested design to BS6755 Pt 2, API 6FA or API 607,certified accordingly and fitted with fire safe seals.
Valves shall be of anti-static design with blow out proof stems.
The design of all ball valves shall incorporate body cavity pressure relief, which shall be achieved through seat design. A hole drilled in the ball to achieve body cavity relief is not acceptable.
Ball valves shall be reduced bore pattern, unless otherwise specified full bore on the individual data sheets. Reduced bores shall be limited to one line size smaller than body size.