HYDROPNEUMATICS PULSE DAMPERS
Hydropneumatics pulsation dampeners use the compressibility of gas, to store peak flow volume. Nitrogen gas compression by the storage of liquid is the source of the word"Hydropneumatics". Hydro = liquid, Pneumatic = the pre-fill gas Nitrogen.
Flow fluctuation “pulsation” is smoothed by the stored volume returning to the system each time the liquid pressure falls.
Dampers are in essence accumulators that are designed to respond instantly to pressure change so that pump acceleration head change is accommodated without a flow velocity variation.
There are many types of Hydropneumatics damper, each is specific to the pump type and its application. Hydro-pneumatic pulsation dampers are therefore the interface between pumps and systems.
To select a suitable hydro pneumatic dampener please click on PULSEGUARD above.
The application of gas compressability to a hydraulic circuit, hydropneumatics, allows the selection of pumps based on average demand. This is the source of energy saving by Gas loaded hydraulic accumulators - aka and for short "Hydropneumatics accumulators".
The accumulator stores volume by pre-fill Nitrogen compression, and when peak demand occurs the nitrogen expands due to a pressure fall, from valve opening, so delivering the peak GPM/Liters per minute, hydro pneumatically.
Calculation for the size requirements of hydropneumatics accumulators are by the gas laws P1.V1.T1.=P2.V2.T2 T2 is to a power 1.3 to account for adiabatic expansion/compression.
There are many types of Hydropneumatics accumulator. Pump control units with storage amount indication; both external tail rod, and proximity switch telemetry, piston type for use with Back-up-bottles, and bladder types which when they fail, do so suddenly. For the choice selection please click on HYDROTROLE above.
|HYDROPNEUMATICS SHOCK ALLEVIATORS
Hydro-pneumatic surge attenuates for pipeline shock and water hammer provide pneumatic gas softness to water and other liquids piping.
The softness beginning at a pre set pressure - the "pre-fill" - allows a pump to start immediately without having to accelerate all of the fluid in the pipeline. This prevents start- up surge.
Similarly the Hydropneumatics water hammer preventor, installed just before a valve that has to be closed fast will provide a place for the liquid to go into against increasing resistance of cushion compression whilst the mass is decelerated. This prevents a water hammer from happening.
There are several types of Hydropneumatics shock absorbers. The choice depends on temperature, corrosive nature of the mass to be addressed, the pressure rating etc. To make your preliminary choice please click on SHOCKGUARD ABOVE.