Pulsation Dampeners

Pulsation dampers are mandatory accessories for metering pumps to eliminate pulsation of the lines. Pulsation dampers smooth pulsation and water hammer caused by positive displacement pumps such as plunger pumps and diaphragm pumps. It isolates the gas from the liquid in the line by a corrosion-resistant diaphragm, smoothing the pulsation of the line through changes in the volume of the gas chamber.

1. Positive displacement pumps cause flow and pressure pulsation due to its structural and working characteristics, and adversely affect the pump and process flow. When the damper is installed in the pipeline system, the flow pressure pulsation can be effectively reduced.

2. The Pulsation Dampener shell material is UPVC、PVDF or SS316, and the diaphragm materials are FKM, NBR, and PTFE to meet the needs of different media.

1. Reduce the harm of the water hammer on the system.
2. reduce the peak of the flow rate fluctuation.
3. protect the pipeline, elbow, joints from pressure fluctuations.
4. Create a good working environment for the metering pump and improve the working performance of the pump.
5. allowing the system to use smaller pipe diameters and reduce costs.
6. use with the back pressure valve can make the pressure fluctuation of the pipeline close to zero.
7. reduce the energy consumption of the system.

Operational Principle
According to Boyle’s law P1V1=P2V2, the pulsation of the pipeline is smoothed by the volume of the gas. For systems with sinusoidal curve characteristics of flow rate, when the wave peak, the volume of the air chamber becomes smaller, the Pulsation Dampener absorbs the excess flow of liquid, and during the trough, the volume of the air chamber becomes larger, and the stored liquid is released, so as to achieve the effect of smooth pulsation.

It can be pre-inflated, and the effect of smooth pulsation after inflation is better than that of air-type pulsation dampers.
The gas does not come into contact with the liquid in the pipeline; the gas is not lost by dissolving into the liquid.
A limit device is provided to prevent excessive deformation of the diaphragm.

Pulsation Dampers Design Drawing
Pulsation Dampeners Design Drawing
Pulsation Dampener Design Drawing
Main Data
Model Body Material Size
DAP11ST 316L 0.15L
DAP21ST 316L 0.2L
DAP31ST 316L 0.5L
DAP41ST 316L 1.0L
DAP51ST 316L 1.5L
DAP61ST 316L 3.0L
L1 L2 A B C D1 D2 D3 N
179 140 27 94 / 90 90 / 1/2″Rc
208 169 86 63 / 121 100 / 1/2″Rc
231 192 86 88 / 121 100 / 1/2″Rc
265 226 106 100 / 151 125 / 1″Rc
344 305 106 50 130 151 125 151 1″Rc
499 460 106 205 130 151 125 151 1″Rc
509 470 130 175 145 203 168 203 1.5″Rc
178 139 35 85 / 67 70 / 1/2″NPT
200 161 42 100 / 75 87 / 1/2″NPT
224 185 73 92 / 100 86 / 1/2″NPT
247 208 86 103 / 126 110 / 1″NPT
329 290 86 83 102 126 112 126 1″NPT
495 456 86 249 102 126 112 126 1″NPT
Body Material PVC, PVDF, 316L Stainless Steel (SS), additional materials may be available on request
Diaphragm BIIR, FPM
Pressure Range Plastic ≤10bar, Metal ≤24bar
Max Temperature Plastic 45℃, Metal 60℃
Back Pressure Valve, Pressure Relief Valve, Pulsation Dampers, Metering Pump - Typical Installation
Typical Installation
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