Slow Closing Check Valve

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Slow Closing Check Valve

Slow Closing Check Valve

Type：300X
Subtitle：Water Hammer Elimination Valve
Our 300X slow closing check valve is specifically designed for water supply systems to prevent water hammer effects while ensuring reliable backflow prevention. The hydraulic damping system enables controlled valve closure in 5-60 seconds (adjustable), effectively eliminating pressure surges in pipelines.
Label：Water hammer check valve
Category：Hydraulic control valve
Working conditions：Building Construction, sewage treatment plant, water plant
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Product Overview

Our 300X slow closing check valve is specifically designed for water supply systems to prevent water hammer effects while ensuring reliable backflow prevention. The hydraulic damping system enables controlled valve closure in 5-60 seconds (adjustable), effectively eliminating pressure surges in pipelines.

Key Features

Adjustable Closing Speed - 5-60 second range via damping control
Silent Operation - Eliminates valve slam noise
Low Head Loss - Streamlined disc design (Kv=1.2)
Maintenance-Free - Stainless steel internal components
Bubble-Tight Seal - Resilient seat (NBR/EPDM)

Working Principle

  1. Flow Direction: Water pushes disc open

  2. Flow Stopping: Disc begins controlled closing

  3. Damping Phase: Hydraulic cylinder regulates closing speed

  4. Full Closure: Seals securely before reverse flow occurs

Applications

✔ Pump Discharge Lines - Prevent pump check valve slam
✔ Water Treatment Plants - Protect filter systems
✔ HVAC Chilled Water - Safeguard heat exchangers
✔ Fire Protection Systems - Maintain steady pressure
✔ Municipal Water Networks - Protect aging pipelines

Competitive Advantages

Feature300X ValveStandard Check ValveSwing Check Valve
Closing ControlAdjustable 5-60sInstant (<1s)1-3s uncontrolled
Water HammerEliminatesCausesMay cause
Head LossLow (Kv=1.2)MediumHigh
Noise LevelSilent (<30dB)Loud slamModerate noise
Medium
water

Working conditions

Building Construction, sewage treatment plant, water plant

Summarize

The 300X slow closing check valve provides superior water hammer protection through its innovative hydraulic damping system, offering:Controlled Deceleration – Adjustable closing profileSystem Protection – Prevents pressure surges up to 25barMaintenance Savings – 10+ year service life typical

Product Parameters

Size RangeDN50-DN1200 (2"-48")
Pressure RatingPN10-PN25 (Class 150-300)
Body MaterialsDuctile Iron (epoxy coated), WCB, 304SS
Disc Material304SS + NBR/EPDM sealing
Closing Time5-60 seconds (field adjustable)
Max Working Temp80°C (176°F) standard / 120°C (248°F) optional
Water Hammer Elimination Valve

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Slow Closing Check Valve
Slow Closing Check Valve
tag:Water hammer check valve
Category: Hydraulic control valve
Our 300X slow closing check valve is specifically designed for water supply systems to prevent water hammer effects while ensuring reliable backflow prevention. The hydraulic damping system enables controlled valve closure in 5-60 seconds (adjustable), effectively eliminating pressure...