Diaphragm Pulse Dampener

Diaphragm Pulse Dampener for Stable Pump Flow and Pressure

OVELL diaphragm pulse dampeners are designed to reduce pulsation and pressure fluctuations generated by reciprocating pumps such as air operated diaphragm pumps and metering pumps.

Because diaphragm pumps operate in alternating suction and discharge cycles, the liquid flow is naturally pulsating rather than perfectly continuous. These pulsations can create pressure spikes, vibration, noise and unstable downstream flow.

A diaphragm pulse dampener absorbs part of this pressure variation and releases it back into the system as pressure decreases, helping create smoother and more stable fluid transfer.

How Does a Diaphragm Pulse Dampener Work?

A diaphragm pulse dampener contains a flexible diaphragm that separates the process fluid from a compressed gas or air chamber.

When pump discharge pressure rises, the diaphragm moves and absorbs part of the pressure energy.

When discharge pressure falls, the stored energy is released back into the fluid system.

This continuous compression and expansion process helps reduce:

• Pressure spikes
• Flow pulsation
• Pipeline vibration
• Hydraulic shock
• Water hammer
• Stress on valves and fittings

The effectiveness of the pulse dampener depends on correct sizing, installation position and gas pre-charge pressure.

Benefits of Using a Pulse Dampener

Reduced Flow Pulsation

Reciprocating pumps naturally create interrupted flow. A diaphragm pulse dampener helps smooth these fluctuations and produce a more consistent downstream flow.

Improved Pressure Stability

Pressure variation can affect valves, instruments, filters and process equipment. A pulse dampener helps reduce peak pressure and stabilize the fluid system.

Water Hammer Reduction

Rapid changes in fluid velocity can create hydraulic shock or water hammer.

A properly sized pulse dampener can absorb pressure surges and help protect the piping system.

Improved Metering and Dosing Performance

Stable pressure and flow can improve dosing consistency in metering pump applications.

This is especially useful in chemical dosing, water treatment and process control systems.

Reduced Vibration and Noise

Pressure pulsation can cause piping vibration and operating noise.

A pulse dampener helps reduce these effects and can improve the overall operating environment.

Diaphragm Pulse Dampener for AODD Pumps

Air operated double diaphragm pumps produce pulsating discharge because each diaphragm alternately performs suction and discharge strokes.

In applications where smooth flow is important, a pulse dampener can be installed on the pump discharge line.

Typical benefits include:

• Smoother discharge flow
• Reduced pipeline vibration
• Reduced pressure fluctuation
• Improved filter performance
• Better flowmeter stability
• Reduced stress on valves and piping

A pulse dampener is especially useful when an AODD pump supplies sensitive downstream equipment or long piping systems.

Pulse Dampener for Metering Pumps

Metering pumps often operate with highly repetitive discharge strokes.

Without pulsation control, these strokes can cause pressure variation that affects dosing accuracy and downstream instrumentation.

A diaphragm pulse dampener installed close to the pump discharge can help stabilize pressure and improve dosing consistency.

Typical applications include:

• Chemical dosing
• pH adjustment
• Water treatment
• Additive injection
• Polymer dosing
• Industrial process control

Typical Applications

OVELL diaphragm pulse dampeners can be used in:

• Air operated diaphragm pump systems
• Metering pump systems
• Chemical dosing systems
• Water and wastewater treatment
• Battery manufacturing
• Coatings and paint processing
• Filtration systems
• Flowmeter protection
• Process instrumentation
• Chemical transfer
• Slurry transfer systems
• Industrial fluid circulation

Where Should a Pulse Dampener Be Installed?

For best performance, the pulse dampener should normally be installed as close as practical to the pump discharge.

The installation should minimize unnecessary pipe volume between the pump and dampener.

Proper installation helps the dampener react quickly to pressure changes created by each pump stroke.

The final installation method should consider:

• Pump type
• Flow rate
• Operating pressure
• Fluid viscosity
• Pipeline diameter
• Pulse frequency
• Fluid temperature
• Chemical compatibility

How to Select the Right Diaphragm Pulse Dampener

When selecting a diaphragm pulse dampener, consider:

• Pump flow rate
• Pump displacement per stroke
• Operating pressure
• Required pulsation reduction
• Fluid viscosity
• Fluid temperature
• Chemical compatibility
• Pipeline size
• Pump operating frequency
• System pressure variation

The diaphragm and wetted materials should be selected according to the chemical properties of the transferred fluid.

Correct sizing and pre-charge pressure are important for achieving effective pulsation reduction.

OVELL Diaphragm Pulse Dampener Solutions

OVELL provides diaphragm pulse dampeners for industrial pump systems requiring smoother flow, improved pressure stability and reduced hydraulic shock.

The dampener can be used with AODD pumps, metering pumps and other reciprocating pump technologies.

For product selection, provide the pump model, flow rate, operating pressure, fluid type, viscosity, temperature and pipeline size so that an appropriate pulse dampener can be recommended.

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