Principle: Pulsation dampener PD

Operation
The pulsation dampener is a vessel filled with compressed gas. The gas is entrapped by the elastomeric bladder, which prevents contact between the process fluid and compressed gas. When a pulse is created, fluid enters the wetted chamber of the dampener, displacing the bladder,compressing the gas and absorbing the shock. When the liquid pressure decreases, the gas expands pushing the fluid back to the process line. The pump’s discharge will produce an almost steady fluid flow.

Advantages

• Dampeners avoid vibrations of the pipeline, which cause material fatigues and pipe breaks.
• Compensation of hydraulic surge (”water hammer”) protects integrated fittings.
• Create a nearly steady and continuous fluid flow, which increases the accuracy of the flow meter systems.
• Explosion proof models in comliance with ATEX Directive 94/9/EC.

Installation
Mount pulsation dampener as close to the pump as possible. For models with automatic air control it is not necessary to regulate the dampener pressure and to adjust the dampener if there are pressure variations. They regulate themselves in dependence on the system pressure. The air supply of the dampener and of the air operated double diaphragm pump are parallel.