Non Slam Water Hammer Elimination Butterfly Buffer Check Valve

The Dafugui Non Slam Water Hammer Elimination Butterfly Buffer Check Valve is engineered to provide stable backflow prevention in pumping systems where rapid valve closure may create transient pressure changes.

Traditional check valves may generate impact forces when the disc quickly returns to the closed position after pump stoppage. This butterfly buffer check valve uses a controlled closing structure to slow down the final disc movement before seating, reducing mechanical impact between the disc and valve seat.

The design is suitable for long-distance water transmission pipelines, pump stations, industrial water systems, and applications requiring reduced vibration and operating noise.

Non-Slam Closing Principle

Controlled Disc Movement

During normal operation, forward fluid pressure keeps the butterfly disc open with minimal flow resistance.

When the Non Slam Water Hammer Elimination Butterfly Buffer Check Valve stops or flow direction changes:

The disc begins closing under reverse flow force.

The initial closing movement occurs rapidly to limit reverse flow.

The buffering mechanism controls the final closing stage.

The disc contacts the seat gradually, reducing closing impact.

This two-stage closing process helps lower sudden pressure changes and improves valve service stability.

Key Design Features

Water Hammer Pressure Surge Control

Water hammer occurs when flowing fluid changes velocity rapidly, creating pressure waves inside the pipeline.

The Non Slam Butterfly Buffer Check Valve helps control this condition by:

Reducing rapid disc impact during closure

Smoothing the final seating process

Lowering vibration transmitted to pipelines and equipment

Protecting connected components such as flanges, gaskets, and pressure instruments

The actual pressure response depends on pipeline length, fluid velocity, pump characteristics, and system design.

Low-Noise Operation for Pump Stations

Compared with conventional check valves that may create noticeable closing impact noise, the buffered closing structure provides smoother operation.

It is suitable for:

Indoor pump rooms

Urban water facilities

Residential water infrastructure

Industrial plants requiring lower operating noise

Butterfly Disc Structure for Large Pipeline Applications

The butterfly configuration provides:

Compact valve dimensions

Lower installation space requirements

Suitable solutions for large diameter pipelines

Reduced maintenance complexity

The streamlined flow passage helps maintain efficient fluid movement under normal operating conditions.

Application Areas

Selection Guide for Engineering Projects

When selecting a Non Slam Water Hammer Elimination Butterfly Buffer Check Valve, engineers should consider:

Pipeline Parameters

Pipe diameter

Flow velocity

Operating pressure

Pump capacity

Pipeline length

Fluid Conditions

Clean water

Sewage

Cooling water

Industrial process water

Installation Requirements

Horizontal or vertical installation conditions

Available maintenance space

Required flange standard

Dafugui can provide configuration recommendations based on project operating data.

Frequently Asked Questions

How does this Non Slam Water Hammer Elimination Butterfly Buffer Check Valve safeguard against joint weeping?

By eliminating sudden dynamic pressure spikes, it keeps internal pipeline pressures well within normal operating thresholds, preventing flange gaskets from relaxing or blowing out.

Can a client request third-party inspection (e.g., SGS, TÜV, BV) before factory shipment?

Yes, Dafugui routinely welcomes third-party inspectors to review manufacturing documentation, witness hydrostatic pressure tests, and verify packaging compliance.

What options exist if a customized valve size requires non-standard flange drilling?

Our CNC turning workshop can machine non-standard flange bolt hole layouts according to custom engineering drawings submitted during order placement.