Why pulsation dampeners matter

Pulsation dampeners are vital to protect pump system components, and minimise damage, especially to pipe welds and supports.

Pulsation dampeners (also called pulsation dampers) are used for stabilising the flow and the pressure in circuits with volumetric pumps or dosing pumps.

This vital component of reciprocating positive displacement pump performs the following functions:

  • Controls pipe hammer and vibration.
  • Reduces load on the pump.
  • Minimises pulsations to protect or enhance the accuracy of downstream instrumentation.
  • Lowers potential for pulsations as a dictate of the process.

Pulsation dampeners act much like a car’s shock absorber would, dampening resulting hydraulic shocks while controlling pipe rattle and pressure fluctuations in the system. By lowering the risk of shock and excess movement, they can minimise the damage to the pump system’s components, especially pipe welds and supports.

Pulsation dampeners act much like a car’s shock absorbers, dampening hydraulic shocks while controlling pipe rattle and pressure fluctuations.

Pulsation dampeners are applicable to the following industries:

  • Oil prospecting and refining
  • Chemical and pharmaceutical manufacturing
  • Food and beverage manufacturing
  • Petrochemical production
  • Wastewater treatment
  • Water distribution
  • Power generation

A pulsation dampener is a container containing gas, usually dry nitrogen. In every pulsation dampener there is a separator element between the gas it is charged with and the liquid of the circuit. Its basic function is to avoid leaking gas into the circuit. This separator element is basically made from two kinds of materials: Rubber (NBR, EPDM, FPM, butyl, silicone, etc.) or a thermoplastic material (normally PTFE). It can also be made in stainless steel.

When a rubber separator element is used, the dampener is called a bladder type. If the material is PTFE, we refer to them as a membrane type and bellows type dampener, depending on the shape of the separator element. The bellows can also be made of stainless steel, to suit special dampeners designed for working with high temperature liquids. Choosing between different types of dampeners depends on characteristics of the circuit like working pressure, temperature and chemical compatibility between the liquid and the material of the separator.


All HIDRACAR S.A. pulsation dampeners are made according to the European PED97/23/CE pressure vessels regulations, and their design meets the AD-2000 and ASME VIII Div.1 & 8 codes requirements (“U” stamp pending).

They can supply all of the dampeners with different circuit connections, gauges as well as fitted with whatever flange, either screwed on, welded or integrated, to suit the customer’s needs.

HIDRACAR S.A. are a leader in the field of pulsation dampers, oleo-pneumatic accumulators, shock absorbers, oleo-hydraulic starters for diesel engines and oleo-pneumatic suspensions for agricultural tanks and trailers.

Since 1974 their experience and knowledge has been fully available to their customers, whose confidence in their products has been the key factor in HIDRACAR worldwide success. Their facilities occupy land 7 000m2 in size. The facilities have a workshop area for the storage of raw materials, machining, welding and painting with an area of 1 200m2 ; another area is destined for the storage of elaborated product, assembly and vulcanization with a surface area of 1 100m2 and a space destined for offices is 520m2 in size.

Ask Air & Vacuum Technologies for assistance with your application and to find the right solution with the help of factory engineers.

Air & Vacuum Technologies

The leading provider of a wide range of equipment to all parts of South & Southern Africa, with our equipment being used in most industries.
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