The axial nozzle check valve is the preferred solution for preventing return flow or shocks on critical process equipment. Typically used on rotating devices and systems where low-pressure loss, stable operation, and smooth dynamic behavior are essential.
High-Performance Nozzle Type Non-Slam Check Valve delivers an effective dynamic response under various flow deceleration applications and compared to the dual plate check valve and swing check valve as below figure 1.
- This nozzle check valve only has a few moving parts, the disc is the only moving part, which means minimizing wear.
- Axial movement of the disc – Disc and seating configuration gives streamlined flow path with venturi effect, resulting in low-pressure drop.
- Short stroke of the spring-assisted disc – Inlet flow velocity moves the disc axially with a short stroke. In response to flow velocity reduction, a compressed spring initiates valve closure and provides a quick response.
- Spring options – Choice of spring affects the critical velocity and valve response. Selection is made on engineering evaluation of specific applications. In absence of this data, a standard spring will be provided.
|Valve Pressure Testing and Inspection||API 598|
|Pressure/Temperature Ratings||ASME B16.34|
|Pipeline Valves||API 6D|
|Production Valves||API 6A|
|Pressure Equipment Directive||2014/68/EU|
|International Standards Organisation Cryogenic testing||ISO 28921 – 1|
|British Valve Standard Cryogenic testing||BS 6364|
|Manufacturing Standards Society||MSS SP-134|