|Size & Pressure Rating & Standard|
|Pressure Rating||DN50-100 PN16 DN150-200 PN10 DN250-400 PN7 DN450-600 PN5 DN650-750 PN4 DN800-900 PN3 DN1000 PN2|
|Flange Standard||GB/T15188.2-94 chart6-7|
|Body||Ductile iron; WCB; CF8; CF8M; 2205; 2507|
|Disc||SS304; SS316; 2205; 2507; 1.4529|
|Stem/Shaft||SS410/420/416; SS431; SS304; Monel|
|Seat||Stainless Steel+STL EPDM (120°C) /Viton(200°C)/PTFE(200°C) /NBR(90°C)|
|O Ring||NBR, EPDM, FKM|
|Actuator||Gear Box, Electric Actuator, Pneumatic Actuator|
Knife gate valves are mainly used in papermaking, chemical fiber, petrochemical, metallurgy, mud, electricity, sewage treatment. In pharmaceutical and other working conditions, the knife gate valve is mainly composed of a valve body and a gate. The material of the valve body is ductile iron, carbon steel and stainless steel, and the sealing surface is made of natural wear-resistant rubber, fluorine rubber, nitrile rubber, and EPDM rubber. And metal sealing, from the structural point of view, the knife gate valve has a compact design, takes up little space, and can effectively support the strength of the pipeline.
There are 3 features as below:
1. Stainless Steel stem with good corrosion resistance offers a long service life. For rising stem only, a stem protector can be provided for additional protection against dust while the valve in the open position.
2. All ZFA cast iron and cast steel valve bodies and components are epoxy coated, well protecting inner port and surface against corrosive and firty conditions for longer service life. The ZFA standard coating color is RAL5050.
3. Deflection cone, V or pentagonal port, Injection holes, Locking device, Solenoid valve, Positioners, Limit switches, Proximity switches, Magnetic switches, Air filter, Stem extension etc.
ZFA Valve strictly execute API598 standard, we do both side pressure testing for all the valve 100%, guarantee deliver 100% quality valves to our customers.
The valve body adopt GB standard material, there’re total 15 process from iron to valve body.
The quality inspection from the blank to the finished product is 100% guaranteed.
ZFA Valve focus on valves production for 17 years, with professional production team, we can help our customers to archive your goals with our stable quality.
Tianjin Zhongfa Valve Co., Ltd. Founded in 2006, a valve manufacturer in Tianjin, China. Mainly produce butterfly valve, gate valve, check valve, knife gate valve etc.
We keep in high efficiency and strictly management of quality control, provide timely and effective pre-sale, sale and after-sales service in order to achieve effectiveness and customer satisfaction. We have gotten the ISO9001, CE Certification.
Valve Parts Machining: We not only supply valve, but also valve parts, mainly body, disc, stem and handle. Some of our regular customers keeping order valve parts more than 10 years, we also produce valve parts mold according to your drawing.