no slam check valve Description
Non slam check valves are a class of check valves that achieve zero or very low leakage rates through optimised sealing structures, and are mainly used in fluid control systems with stringent requirements on sealing performance to prevent backflow of media and avoid environmental pollution or equipment damage. control system, to prevent backflow of media and avoid environmental pollution or equipment damage. Its core functions include:
Blocking backflow: stopping the reverse flow of media through the rapid closure of the valve flap;
Zero leakage sealing: using elastic or hard sealing technology to meet the environmental and safety requirements of chemical industry, water supply and other scenarios.
Key structure and technical characteristics
1. Seal technology innovation
Multi-layer composite sealing: combining metal valve seat and elastic sealing piece (such as EPDM, PTFE) to enhance the sealing surface fit and reduce the risk of leakage after long-term use;
Adjusting mechanism design: equipped with manual or automatic adjusting device (as described in patent CN217634056U), which can control the swing angle of the valve flap and accurately match the demand of working conditions.
2. Special structure types
Vertical and horizontal design: support horizontal or vertical installation, suitable for complex piping layout (such as H42S-16, H41S models);
Sandwich plate construction: such as Rexroth Z2S series, adopting modular design to achieve no leakage and blockage and compatible with multiple actuator ports.
no slam check valve specification
Normal diameter: 2 - 48 Inch (DN50 - DN1200)
Pressure range: Class 150 - 2500 LB
End connection: RF, RTJ
Working temperature: -29℃ ~ +400℃
Material: Carbon Steel, Stainless Steel, Alloy Steel, Aluminum bronze, Ti
Design and Manufacture: API 594
Structural length: API 594
Connection: ASME B16.5, ASME B16.47
Test and Inspection: API 598
no slam check valve
Selection and maintenance points
Selection key parameters:
Pressure level: conventional PN16-PN40, high-pressure optional Class 300 or more cast steel valve body;
Media characteristics: containing particles when the priority hard seal, clean media can choose elastic seal;
Installation direction: vertical installation needs to ensure that the direction of valve gravity and media flow direction match.
Maintenance recommendations:
Every 6-12 months to check the sealing surface wear and elastic element aging;
Containing solid particles of the media is recommended to increase the pre-filter to extend the life of the valve.
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