4A Knife Gate Valve

NSV 4A Knife Gate Valve

The valve features a unidirectional sealing design with the seat located on one side only, resulting in a simple and cost-effective structure.

 It has a full-port stainless steel body with flanged connection and manual handwheel operation, offering low flow resistance, clog resistance, and smooth actuation.

 Suitable for slurry, sludge, and abrasive media, it employs a single-piece blade that passes through solid particles without obstruction.

Key Features

Valve Type: Knife Gate Valve (Manual, Unidirectional)

Body Material: 4A; also available in 1A, 5A, 6A and duplex stainless steel configurations

Size Range: 2"–48" (DN50–DN1200)

Pressure Rating: Class 150 / PN16

End Connection: Flanged (RF/FF)

Design Standard: ASME B16.34

Performance Advantages

Single-side resilient sealing simplifies structure and reduces cost; full-port flow minimizes clogging in high-solids services; stainless or duplex steel body offers excellent corrosion and erosion resistance; manual operation requires low torque and provides reliable control in fixed-direction pipelines.

Typical Applications

Wastewater discharge, mining slurry lines, pulp transport, ash handling, seawater systems, and chemical processes requiring enhanced corrosion resistance.

Quality Assurance

Hydrostatically tested per ASME B16.34. Supplied with EN 10204 3.1 material test certificate (MTC 3.1) and EN 10204 2.1 certificate of conformity (COC 2.1).

FAQ

1. Q: What’s the valves warranty?A: Our valves warranty period should be 18 months from the date of shipment or 12 months after installation, whichever occurs first.
2. Q:Does your company have any agent/distributor with the exception of China?

A: At present,we have agent in Indonesia,Singapore,Canada,Mexico,Iraq,and welcome contact us if you would like to join us.

3. Q:Does “NSV” valves have supply to any value end user?

A:Yes,,it just like PETROKIMIA GRESIK in Indonesia, BP Iraq,ESFAHAN MOBARAKEH STEEL In Iran etc.

4. Q:Do you have customized valve?

A:Yes,we can supply customized valves.