What is the purpose of the knife gate valve and Feature of Knife gate

What is the purpose of the knife gate valve?

The appearance of knife gate valve has solved the problems of heavy weight, large flow resistance, large area and difficult installation of ordinary gate valve. It can replace the universal shut-off valve, and can work under the working pressure of 1.0MPa-2.5MPa and the operating temperature of – 29-550 ℃. The gate of the knife gate valve has the shearing function, which can scrape the adhesive on the sealing surface and automatically remove the debris. The stainless steel gate can prevent the seal leakage caused by corrosion.

The knife gate valve is applicable to the oil, water and steam pipelines of coal preparation, slag discharge, urban sewage treatment, food, paper making, medicine, petroleum, chemical industry and other oil products, water and steam pipelines in the mine power plant, and the medium such as cement slurry, gold powder, mineral sand, slag, coal slurry, pulp, wood pulp, tailings, fiber, dust, chemical treatment sewage, sedimentation tank, asphalt, silo outlet, fruit, grain, slaughterhouse wastewater, etc.

stainless steel CF8 knife gate valve bonnet less MSS SP67 Manual

Features of knife gate valve

1. The lifting ram sealing surface can scrape the adhesive on the sealing surface and automatically remove the debris.

2. Stainless steel ram can prevent seal leakage caused by corrosion, and fine grinding and polishing can obtain better sealing effect.

3. The stainless steel valve body is durable, the design of the valve body reinforcing rib improves the strength of the valve body, and the double head screw can be opened and closed more quickly.

4. The valve body and filler culvert are precision cast, in which the valve body is integrally cast with flange, the material can be 304, 316, 316L, WCB, 2Crl3 according to the user’s needs, and the sealing ring is made of PTFE reinforced PTFE, which is corrosion resistant, wear-resistant, and slag free.

5. The round DC channel is designed to be free of slag and jamming.

6. The scientific design of the upper seal stuffing box makes the upper seal safe, effective and durable.

7. Short structure length can save raw materials, installation space and effectively support pipeline strength.

8. Triangular supports save raw materials and ensure required mechanical properties.

9. The guide block on the knife gate valve body makes the gate move correctly. The extrusion block ensures the effective sealing of the ram.

10. The valve plate has 5 supporting points. When the valve is closed and bears back pressure, the valve plate will not shift.

wafer-flanged knife gate valve DN250 PN16 Manual PTFE seat

The world young scientists (Wenzhou) summit 2019: Yongjia pump valve industry summit forum

In the afternoon of October 26, the world young scientists (Wenzhou) summit 2019 Yongjia pump valve industry summit forum was held. All kinds of talents from all over the world gathered together to talk about advanced technology and seek innovative development around Yongjia pump valve industry technology docking activities, aiming to lead Yongjia pump valve industry innovation and upgrading, help Yongjia economy develop with high quality and better serve the new era. “Two health” construction in Wenzhou. Chen Xuedong, academician of Chinese Academy of engineering and technical expert of special equipment design, manufacturing, operation and maintenance engineering attended the Forum.

Continue reading “The world young scientists (Wenzhou) summit 2019: Yongjia pump valve industry summit forum”

New excellent valve product – Semi-ball valve

Semi ball valves have the characteristics of small opening force, good sealing performance, etc. Hemispherical valves are widely used in two-phase media such as water, steam, sewage, petrochemical industry, natural gas, solution and slurry, as well as ideal transmission equipment for dust and gas, because of their wear-resistant and corrosion-resistant materials.


When storing semi ball valves for a long time, regular inspection should be carried out to keep the surface area runner clean, remove dirt, and coat with preservatives to keep them in a semi-open state. Continue reading “New excellent valve product – Semi-ball valve”

Promoting Green Casting is the Development Trend of Valve Casting Industry in the Future

At present, people have very high quality requirements for precision valve steel castings, so during the process , valve manufacturers also pay great attention to the selection of process methods and production processes, so as to ensure that the production of steel castings can reach higher application standards. First of all, we should be more cautious when choosing raw materials. Although many steel castings do not have much difference in appearance, due to the different selection of raw materials, there will be differences in quality and service life of steel castings in the process of using, so the selection method of raw materials needs special attention.

Making a correct and reasonable production process is the key to reduce the cost of resin sand casting valve. Whether it is reasonable or not directly affects the yield, quality and cost of castings. Continue reading “Promoting Green Casting is the Development Trend of Valve Casting Industry in the Future”

API 6D Stainless steel/Carbon steel Spring Return Deadman Lever Operated Ball Valve

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.

API6D stainless steel Spring return Deadman lever operated ball valve with 2pc body DN50 150LBa

Spring return lever ball valve  Continue reading “API 6D Stainless steel/Carbon steel Spring Return Deadman Lever Operated Ball Valve”

Concentric Butterfly Valve Stock/fast delivery Available-Europe Wareshouse

Center Disc Butterfly Valve Stock and Semi-finished products.

To meet client urgent need and quick delivery, Sangong Flow Control Concentric Butterfly Valve factory keeps Large qty Ductile Iron /stailess steel stock and valve parts.

butterfly valve body casting stock, ductile iron, mainly use for clean medium water, civil project,water treatment, power plant, building, offshore/marine supertructure

For below semi-finished products, can be delivery within 3days.
Include: Wafer ductile iron from DN32 to DN1200 suitble for both PN6 PN10 PN16 PN25 150LB, JIS10K,
U type Double flanged body, Wafer-lug type 150lb, CF8 /CF8M body Continue reading “Concentric Butterfly Valve Stock/fast delivery Available-Europe Wareshouse”

Oilfield services firm Weatherford to file for Chapter 11 bankruptcy

(Reuters) – Oilfield services provider Weatherford International Plc, burdened by a heavy debt load and years of losses, said on Friday it would file for Chapter 11 bankruptcy protection.

The company, which at its peak was valued at more than $50 billion, never recovered from the 2014 oil price collapse. Efforts under Chief Executive Officer Mark McCollum to quickly sell assets and pare debt struggled.

Continue reading “Oilfield services firm Weatherford to file for Chapter 11 bankruptcy”

Rectangular knife gate /Stainless steel Penstock Used for Russia Oil Refinery Phase I

Rectangular Port/Square Slide Gate Valve/ Penstock usually is mainly used for water supply and drainage, chemical flood control, water conservancy and other hydraulic structures, outlets, working channels switching or cutting off water flow.
Depends on amount method can be Canal/Channel gate valve, Wall- attached Slide gate valve/Wall -Mounted Penstock

Packing of Mannual Chanel Mounting Stainless steel Rectangular Sluice gate valve

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Extension long stem concentric butterfly valve for Germany plant

The purpose of extension long stem for valve mainly for three reason: Low temp. medium , High temp. medium, Remote operation. 1. Low temp. medium, to reduce heat transportation, keep neck packing warm enough. so long stem was adopted. 2. High temp. medium, to have better heat radiation,to keep neck packing cool enough and also easy for operator touch, extension was considered. 3. Remote control, to enable operator control valve far from pipe valve, extension can also be used.

Assemble and Position Adjustment of rubber butterfly valve with long extension

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Oxygen globe valve: copper alloy globe valve

Oxygen globe valve is one of the special valves for oxygen pipeline network. It not only has the function of ordinary globe valve, but also has the characteristics of good flame retardancy, good conductivity, fast heat transfer, compact structure, oil proof, safety and reliability. With the development of metallurgical industry, oxygen globe valve and oxygen ball valve are widely used in iron and steel, metallurgy, medicine, chemical industry and so on.

Bronze Oxygen Globe Valve DN200PN25


Compressed oxygen exposed to a small amount of oil will immediately burn violently and cause explosion, so oxygen pipeline pipes, fittings, Continue reading “Oxygen globe valve: copper alloy globe valve”