Large-Diameter Axial Flow Check Valve

NSV Large-Diameter Axial Flow Check Valve

This axial flow check valve features a streamlined, straight-through body design with a spring-assisted disc that moves axially along the flow path. The valve opens automatically under forward flow and closes rapidly when flow decelerates or reverses, effectively preventing backflow and minimizing water hammer damage in large-diameter piping systems .

Key Features

Axial Flow Design: Streamlined internal flow path with venturi-shaped structure ensures laminar flow, significantly reducing pressure loss and energy consumption compared to traditional swing or dual-plate check valves .

Short Stroke & Fast Response: The disc travels a short axial distance, enabling rapid closure and dynamic response to flow changes, which effectively reduces water hammer impact .

Spring-Assisted Closure: High-performance spring ensures tight sealing even at low flow velocities, preventing reverse flow damage to pumps and compressors .

Silent Operation: The dynamic force balance system ensures smooth, noiseless operation with minimal vibration .

Large-Diameter Capability: Available in sizes from DN40 up to DN1800 (1.5" to 72") .

Flexible Installation: Can be installed horizontally, vertically, or at any angle .

Wide Material Selection: Available in carbon steel (WCB), stainless steel (CF8/CF8M), ductile iron, and duplex stainless steel for various media and service conditions .

Typical Applications

Widely used in LNG receiving stations, oil and gas pipelines, pumping station discharge lines, water treatment plants, cooling water systems, and long-distance transmission pipelines where reliable backflow prevention and minimized water hammer are critical. Particularly suitable for large-diameter, high-flow systems requiring low pressure drop and energy efficiency .

FAQ

1.Q: What’s the brand of your company can supply ?

A:NSV or OEM service.

2.Q:I want to know how to contact the person in charge.

A: When you call representative call number of company(86-577-67378616), sales team will receive your call if there is no special situation. If you let us know your inquiry, we will put you through to the person in charge. If you need a personal phone number, you have to receive it from the person in charge directly after phone call.

3. Q:Do you have any valve in stock?

A:There have a lot of GGC valves(2”&within) in stock,and that can delivery within one week.