Pulsation dampeners are a kind of housing for the transmission system. The main function is to isolate and absorb mechanical energy from the operation of the powertrain, such as gears, bearings, pumps,…or prevent it in the first place.
Pumps that use reciprocating positive displacement, such as reciprocating centrifugal pumps, have devices called pulse dampeners to control their output pulses. Through control of flow and pressure, they extend the life of hydraulic pumps. You can use pulsation dampeners to improve the overall performance and reliability of your pumping systems.
What do pulsation dampeners do?
A positive displacement pump’s reciprocating nature can cause pulsations and pressure gaps that affect the entire system at some point over time. Additionally, pressure gaps can be caused by pump check valves opening and closing. As with shock absorbers on a car, pulse dampeners minimize pipe rattle and pressure fluctuations by dampening hydraulic shocks. By reducing the energy in the pumped media, a solid pulsation dampener can increase the performance of the system’s additional tools.
Pulsation dampeners reduce the risk of damage to system components, particularly pipe welds and supports, by minimizing shock and excess movement. Pump efficiency, reliability, safety, and maintenance costs are all improved.
How do they do their work?
When used with reciprocating pumps, pulsation dampeners may use compression or exchange to reduce the energy being generated. In the old-fashioned gas-charged dampeners, either a liquid or gas is over a diaphragm, a bladder, or a cartridge to compress the gas. By compressing the gas associated with a reciprocating pump, the gas absorbs pressure spikes and smooths the flow of pumped media. Energy exchange dampeners are maintenance free.
Maintainable pulsation control devices are commonly misunderstood as the pumped medium can absorb pressure spikes generated by reciprocating pumps. There is no truth to this. The pulsation dampeners, however, utilize the kinetic energy exchange mechanism. As kinetic energy is exchanged, the dampener from the reciprocating pump must have a large enough volume for dissipation to reduce adverse effects. For pulsation devices to be effective, they must have large amounts of fluid.
Positive displacement pumps that discharge flow irregularly, and where the piping system does not want the pulses, are commonly dampened by pulse dampeners. The pulsation dampener is typically useful for double diaphragms, metering pumps, and hose/peristaltic pumps.
Typically, pulsation dampeners are categorised depending on their location within the system, and what they’re designed to do. Pulsation dampeners, for example, are located downstream of the pump, inlet stabilizers are located on the inlet side of the pump, and surge suppressors are located next to valves or other devices that restrict the flow.
Since they will work with virtually all pressurized systems (pump systems), pulsation dampeners are used in a range of applications. Electronics or mechanical devices can be based on them, provided there is a need to:
- Vibrations or hammering from pipes should be avoided.
- To protect downstream instrumentation, minimize pulsations.
- As a matter of process, minimize pulsations.
- Ensure that the pump is not overloaded.
- The use of pulsation dampeners is suitable for any industry that deals with fluid flow. High-pressure, high-temperature, corrosive, abrasive, and elevated pressure are just a few of the extreme environments in which they are engineered to perform.
- Manufacturing of chemicals and pharmaceuticals
- Manufacturing food and beverages
- Refining and prospecting for oil
- Production of petrochemicals
- Treatment of wastewater and distribution of water
- Generation of electricity
Best ways to select a pulsation dampener?
It Is Critical to Size Pulsation Dampeners for Effectiveness
- Determine the Adequate Size.
- Identify the Tolerable Variation in Pressure.
- Do a Pressure Fluctuation Calculation.
- Reduce the acceleration head’s size.
- Styles of pulse dampeners.
- Make a calculation of pressure changes.
- Pump constant should be determined.
The pump displacement per stroke is 1,717-mL or 0.187-l, calculated by multiplying the piston cross-sectional area by the stroke length. A rate of 80 percent of system pressure is recommended for the gas precharge.
In-line dampeners should be installed as close as possible to the pump discharge/inlet or quick closing valves. Pump discharge/inlet or quick closing valve should not be more than ten pipe diameters away from the dampener installation. The dampener should be isolated from the system piping by an isolation valve.
Flow and pressure are stabilized in circuits with pumps using pulse dampeners (also known as pulsation dampeners). There are many applications for them. Pulsation dampeners contain dry nitrogen, which is normally used to dampen vibrations.
To achieve optimal performance, pulsation dampeners must be sized correctly. The key to dampener sizing is determining and using the correct pump constant factor. The pulsation dampener will sufficiently dampen pulsations, protecting equipment and keeping pressure pulses within design parameters as long as it is sized, positioned, and charged properly.
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