non slam check valve Description
Non slam check valve is a valve that controls the one-way flow of the medium by closing the valve disc in stages. It has the dual functions of preventing the medium from flowing back and eliminating the impact of water hammer. It is especially suitable for systems with high pressure, large flow and frequent start and stop.
Organization structure
Main structure
Valve body: cast with carbon steel, stainless steel or special alloy (such as Hastelloy), adapted to the corrosive requirements of different media;
Valve disc: common swing single disc or butterfly double eccentric design, with the sealing surface covered with elastic materials such as rubber and polytetrafluoroethylene.
Buffer component
Hydraulic damping device: adjust the closing speed through the cylinder or hydraulic control system (such as hydraulic slow-closing check butterfly valve);
Spring-piston structure: suitable for small-diameter valves (such as DN50 or less) that require fast response.
Auxiliary components
Micro filters, needle valves, ball valves, etc. form a hydraulic control circuit to accurately adjust the timing of the main valve action.
non 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
non slam check valve
Performance advantages and industry value
Water hammer suppression
Reduces the peak water hammer pressure by 60-80% through staged closure, reducing the stress concentration of the pipeline system compared with ordinary check valves;
Energy saving and consumption reduction
Low flow resistance design (flow resistance coefficient ≤ 0.2) reduces the energy consumption of continuous operation of the pump;
Safety and compliance
Complies with API 598, JB/T 9092 and other standards, meeting the safety certification requirements of high-risk scenarios such as nuclear power and chemical industry.
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