Cast steel gate valves can only be fully opened and fully closed to be used for cutting in the pipeline.The entire flow channel is a straight-through passage when the valve is fully-open, and the pressure loss of medium running is minimum.Gate valve is usually for working condition in which the valve is not opened or closed frequently, It's not suitable for adjustment or throttling.The most important feature of the cast steel gate valve of TANA machine is that they can be ensured that the permissible leakage rate can be lower than that specified in API 6D and API 600, and the middle shaft sealing can pass the USA VOC leakage test. Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel may be selected for transportation of water, steam, oil, natural gas, nitric acid, acetic acid, oxidant and urea.
TANA knife gate is a uni-directional or bi-directional lug type valve designed according to MSS-SP-81 and TAPPI-TIS 405 for industrial service ,The design of the body and seat assures non-clogging shut off on suspended solids in industries. A choice of several actuators and accessories is available.
Knife gate valve design
The body design of knife gate valve has the advantages:simple,compact and reasonable structure,smooth port,small flow resistance,light weight,easy installation etc.
Disc:disc is standard stainless steel, both sizes are polished and grinded smoothly as mirror,which can effectively avoid damage of seat through opening or closing and make best seal when close the valve.
Seat:The unique design,mechanical retainer of sealing ring,stainless steel retainer,seat materials:NBR,EPDM,VITON,PTFE.
Packing:There are several layers of braided packing and rubber seal ring,the packing gland compression force,can effectively ensure the sealilng performance.Material is graphite braided packing,PTFE,cotton fiber.
Stem:The stem is made of stainless steel with good corrosion resistance and long service life.
Manual driving mode:Handwheel,Bevel Gear and Gear operated.
Automatic driving mode:Electric,pneumatic,hydralic,electro-hydraulic.
All cast iron,cast steel valves and steel spare parts from TANA are epoxy coated,well protecting valve inner port against corrosive and dirty conditions for longer service life.
Design &Manufacture:MSS SP-81,MSS SP-135,ASME B16.34 etc.
Face to face dimension:MSS SP-81,MSS SP-135,API B16.10,DIN3202 etc.
End Connection:ASME B16.5 ASME B16.47,MSS SP-81 etc.
Test and Inspection:ISO5208,MSS SP-61,API598
Size:2”-48” or DN50-DN1200(large diameter requirments)
Application of work pressure
Operated by:Handwheel,Gear,Pneumatic,hydraulic and Electric actuator etc.
Main Material list
|Parts||Cast steel,cast iron||Stainless steel|
|Disc||AISI 304||AISI 304、AISI 316|
|Packing||PTFE or Graphite spiral-wound gaskets|
|Yoke||Epoxy coated steel|
|Stem protection sleeve||Epoxy coated steel|
|Needle bearing||High quality steel|
|Nut||Epoxy coated steel|
Wenzhou Topnotch Machine Co.,Ltd is a professional leader China Knife gate valve,wafer semi lug knife gate valve,resilient seat knife gate valve,bolted bonnet knife gate valve,rising stem knife gate valve,Through Conduit Knife Gate Valve manufacturer with high quality and low price.Welcome to contact us!