Nozzle (Axial Flow) Check Valve
A check valve, clack valve, non-return valve or one-way valve is a mechanical device, a valve, which normally allows fluid (liquid or gas) to flow through it in only one direction.
Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide variety of applications. Check valves are often part of common household items. Although they are available in a wide range of sizes and costs, check valves generally are very small, simple, and/or inexpensive. Check valves work automatically and most are not controlled by a person or any external control; accordingly, most do not have any valve handle or stem. The bodies (external shells) of most check valves are made of plastic or metal.
An important concept in check valves is the cracking pressure which is the minimum upstream pressure at which the valve will operate. Typically the check valve is designed for and can therefore be specified for a specific cracking pressure.
Nozzle (Axial Flow) Check Valve Characteristic
Non-Slam Closure (Slient)
Low Pressure Loss
Friction-Free Valve Disc Guiding
Metal Sealing / Soft Sealing
Low Weight
Short Face-to-Face length
Maintenance Free
Small Fluid Resistance
Zero Leakage
DN 50 (2") to DN 600 (24")
Up to PN 400 (ANSI 2500)
Nozzle (Axial Flow) Check Valve Specification
 Slient Check Valve, Small Fluid Resistance, Venturi Streamlines.
 Single-Direction Seal, Zero Leakage
 Metal x Metal Seat & Soft Seal
 Ends: RF, Double Flange
 Size: 2" - 80"
 Pressure: 150# 300# 600# 900# 1500# 2500#     
 Operation: self
 Design: API609
 Face to face: ANSI B16.10
 Ends Connection: ANSI B16.5, ANSI B16.47 A Series & B Series
 Testing: API598