Pulsation Dampener

Diaphragm Pulsation Damper

Diaphragm pulsation damper, also known as a pulse dampener or pulsation buffer, is a commonly used component to eliminate pipeline pulsation and water hammer in a metering pump system. It is a necessary accessory for metering pumps. The diaphragm type pulse dampener is divided into upper and lower housing, separated by a PTFE & rubber composite diaphragm in the middle. 

Technical Spec:

  • Volume: 0.15L to 20L (see specification table for details)

  • Rated pressure: 1.0MPA for plastic material; 2.5MPA, 5MPA, 10MPA for metal material (higher pressure can be customized)

  • Connection method: thread, flange, quick connection, etc., can be customized

  • Can be equipped with insulation jacket


  • Shell material (mainly referring to the liquid contacting part): PVC, PP, PVDF, PTFE, carbon steel, SS304, SS316L, fluorine lining, Hastelloy, etc., can be customized as required

  • Diaphragm material: PTFE composite NBR (use temperature -20-80℃); PTFE composite acrylic acid ester (use temperature 80-160℃)

  • Simple method for selecting the volume: multiply the volume of each stroke by 10 to obtain the minimum volume that can reduce 90% of the pulsation.

Product Description

It is the most commonly used type of pulse dampener. The biggest advantage is that the diaphragm separates the pre-charged gas and the liquid in the pipeline, making it easy to maintain. Under suitable selection and charging conditions, it can eliminate more than 90% of pulsation.

Features of diaphragm pulsation damper:

• Diaphragm structure separates the medium and compressed air, ensuring long-term stable operation.

• The contact medium parts only include the lower shell and diaphragm. The conventional diaphragm adopts the rubber-lined PTFE form. The PTFE undergoes multiple rolling processes and has good corrosion resistance and high service life.

• Reduces the harm of water hammer to the system, reduces the peak value of flow rate fluctuation, and protects the pipeline, elbows, and joints from pressure wave impact.

• Creates a good working environment for metering pumps and improves the performance of the pump, reducing system energy consumption.

• Allows the use of smaller pipe diameters, reducing costs. When used in conjunction with a back pressure valve, the pressure wave in the pipeline can be reduced to near-zero.


Volume(L)Pressure(MPa)Valve body(MM)Shell diameter(MM)Connection


RXMZ-P0.35/1.00.351.0227140RC 1/2"PVC/PP/PVDF
RXMZ-P2.0/ 1-1/4″RC 1-1/2″PVC/PP/PVDF
RXMZ-S0.35/2.5(5.0)0.352.5227140RC 1/2″304/316L/HC276
RXMZ-S0.35/100.3510227147RC 1/2″304/316L/HC276
RXMZ-S0.6/2.5(5.0)0.62.5245170RC 3/4″304/316L/HC276
RXMZ-S0.6/100.610245177RC 3/4″304/316L/HC276
RXMZ-S1.0/2.5(5.0)12.5273215RC 1″304/316L/HC276
RXMZ-S1.0/10110273218RC 1″304/316L/HC276
RXMZ-S2.0/2.5(5.0)22.5320260RC 1-1/4″304/316L
RXMZ-S4.0/2.5(5.0)42.5340310RC 1-1/2″304/316L
RXMZ-S6.0/2.5(5.0)62.5345352RC 2″304/316L
RXMZ-S10/2.5102.5400418RC 2″304/316L
RXMZ-S12/2.5(double diaphragm)102.5650330RC 2″304/316L
RXMZ-S20/2.5(double diaphragm)102.5700418RC 2-1/2″304/316L

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