Resistance Slow Closing Check Valve
Resistant
Sealing
Operation
Long Life
Resistance Slow Closing Check Valve is designed to control reverse flow and reduce sudden valve closure, helping minimize water hammer and pressure surges in pipelines. Its slow-closing mechanism provides controlled shut-off and smooth operation, making it suitable for water supply, pumping stations, HVAC, irrigation, and industrial piping systems.
Specifications
Size Range
DN40 to DN800 (1½" to 32")
Seat Material
EPDM / NBR / PTFE
Body Material
Cast Iron / Ductile Iron / Carbon Steel / Stainless Steel
Design
Low-Resistance Flow Passage
Closing Time
Up to 60 seconds, adjustable depending on design
Pressure Rating
PN10 / PN16 / PN25 / PN40
Closing Mechanism
Controlled Slow-Closing Mechanism
Closing Mechanism
Controlled Slow-Closing Mechanism
Maximum Operating Temperature
80°C
Product Images
Frequently Ask Questions
It controls disc closure and can reduce the severity of pressure transients caused by sudden flow reversal.
The controlled closing sequence reduces the sudden stoppage of reverse flow, helping manage pressure surges.
PTFE may be considered when the process medium or temperature requires a different sealing material; chemical compatibility must be verified.
The closing mechanism is selected according to flow rate, valve size, differential pressure, pipeline characteristics, pump conditions and the required closing time.
Yes, ALIS Valves is a Resistance Slow Closing Check Valve Manufacturer in India, offering check valve solutions for controlled closing, reverse-flow prevention and water hammer reduction in water supply, pumping and industrial pipeline applications.
Yes, it can be used on pump discharge pipelines where controlled closure and reverse-flow prevention are required.
EPDM is commonly selected for compatible water-service applications, while NBR may be selected where oil resistance is required.
It is preferred where controlled valve closure is required to reduce sudden flow reversal, pressure surges and water hammer, particularly in pump discharge systems.
A Resistance Slow Closing Check Valve is designed to prevent reverse flow while controlling the closing speed of the valve. Its slow-closing mechanism helps reduce water hammer, pressure surges and impact on pumps and pipelines.
