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Accessories

Pulsation Dampeners

A Pulsation Dampener is an accumulator with a set pre-charge that absorbs system shocks while minimizing pulsations, pipe vibration, water hammering and pressure fluctuations. By minimizing pulsation in the system components like regulators, solenoids, sensors, etc., pumps will see decreased wear and have longer life. Pulsation dampeners are tied directly onto the discharge manifold or plumbed immediately downstream of the pump.

CAT PUMPS offers a wide assortment of pulsation dampeners to meet the demands of any application. From completely sealed to completely re-buildable. The bladders are pre-charged with nitrogen.

  • versions17
  • pressure up to500 bar
  • flow up to265 l/min

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Pulsation Dampeners

Structure

The pulsation damper consists of a welded pressure vessel to which a nozzle is welded on the liquid side. The gas and liquid are separated by a previously inserted bladder. A bladder button is inserted in the bottom of the diaphragm to prevent destruction of the bladder when it is completely emptied. The bladder accumulator can be refilled by means of a gas filling screw. The liquid connection can be supplied in different versions. It is not possible to replace the bladder!
Cutaway view of a pulsation dampener
Gas filling screw
Gas filling screwThe accumulator can be refilled via the gas filling screw. It is pre-charged with nitrogen.
Pressure vessel
Pressure vesselWelded pressure vessel with a connection piece welded on at the fluid side.
Diaphragm
DiaphragmThe diaphragm separates the gas from the fluid. It cannot be replaced.
Diaphragm button
Diaphragm buttonSits in the base of the diaphragm and protects it when the accumulator is emptied completely.
Fluid connection
Fluid connectionThe fluid connection is available in different versions.
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Pulsation Dampeners: all versions

Enter the values of your system. The list shows the versions rated for them – the closest match first. Use the plus to add an item to your request list.

Material
Diaphragm
Volume
Inlet connection

17 items

Part no. MaterialMax. flowPressureDiaphragmVolumeConnection Add to request list
703400 Steel45 l/min210 barNBR0.16 l1/2" NPT(M)
703401 Steel45 l/min210 barNBR0.16 l3/8" NPT(M)
709608 Stainless steel / steel15 l/min200 barNBR0.075 l3/8" G(F)
703404 Stainless steel / steel45 l/min200 barNBR0.16 l3/8" NPT(M)
703403 Stainless steel / steel45 l/min200 barNBR0.16 l1/2" NPT(M)
703402 Stainless steel / steel45 l/min200 barNBR0.16 l3/4" NPT(M)
2550 Stainless steel / steel45 l/min500 barNBR0.25 l1/2" G(F)
703414 Stainless steel / steel150 l/min200 barNBR0.72 l1" NPT(M)
703411 Stainless steel / steel265 l/min100 barNBR2 l1 1/4" NPT(M)
703407 316 stainless steel45 l/min180 barNBR0.16 l3/8" NPT(M)
703406 316 stainless steel45 l/min180 barNBR0.16 l1/2" NPT(M)
703408 316 stainless steel45 l/min180 barFPM0.16 l1/2" NPT(M)
703418 316 stainless steel90 l/min160 barNBR0.32 l1/2" NPT(M)
704740 316 stainless steel90 l/min160 barNBR0.32 l3/4" NPT(M)
703415 316 stainless steel150 l/min140 barNBR0.72 l1" NPT(M)
703416 316 stainless steel150 l/min140 barFPM0.72 l1" NPT(M)
703412 316 stainless steel265 l/min100 barNBR2 l1 1/4" NPT(M)
  • All versions are rechargeable.
  • (M) = male thread, (F) = female thread.