Pipe Shock Guard
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Fluid Flow Control Animations
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International Information Shock Alleviators Pulsationsdaempfer Surge Alleviators

Shock, Surge, and Water Hammer Other Devices that address surge shock and water hammer 316L Stainless Steel Air N2 Nitrogen Process Liquid Carbon Steel Elastomer Cold Forged PVC or Polypropelyne Liquid in bladder Air in huge sacks Flow-thru flex-tube Nitrogen in gas bag PTFE - Flexflon diaphragm and 316 stainless steel shell No diaphragm, no bladders, all metal parts flow through rolling bladder no moving parts metal membrane Shock Suppressor Shock Preventor Shock Alleviater Shock Preventer Shock Arrester Shock Absorber Shock Alleviator Shock Suppresser Shock Attenuater Shock Attenuator Surge Alleviators

Shock preventors smooth damaging pressure spikes in liquids

Installing piping shock preventors

Absorbing the shock and water hammer from rapid valve shut off

Shock Preventors

SHOCK PREVENTORS for suppressing surges in pipes with surging liquids,
are needed to suppress a SHOCK.

SHOCK preventors for smoothing the SHOCK when a pump starts;
these SHOCK preventors are installed down stream of the discharge check valve.

SHOCK preventors dampen the system overpressure from a fast start-up; required
when there is no flow back bypass to suction.

SHOCK preventors stop the shock from quick valve closure and isolator slam;
and work best, when mounted as close to the isolating valve as possible.

SHOCK preventors attenuate bang from reverse flow when pumping system stops,
by being placed immediately after the delivery outlet.

SHOCK preventors arrest the flow gently preventing water hammer;
it is the increase in time for deceleration that counts.

SHOCK preventors suppress the surges from centrifugal fast motor spin-up.
when a loop back to source, with metered restriction was not provided.

SHOCK preventors also used for volume compensation with temperature change, by
functioning as an accumulator.

Fast pump start up, with less surge and pipeline shock

Shock Preventor

SHOCK preventor for leveling the SHOCK when pumps are started;
this SHOCK preventor is piped in, just after of the discharge check valve.

SHOCK preventor suppresses a SHOCK in a pipe having liquids that are surging,
by stabilizing the mass oscillation with their cushioning.

SHOCK preventor stopping shocks from quick valve closure, isolator slam,
is most efficient, when positioned adjacent the isolation valve.

SHOCK preventor dampening system overpressure with instant start-up,
is by substituting for a flow back bypass going to source of supply.

SHOCK preventor attenuates hammer from reverse flow when stopping pumps;
catching the weight of the returning fluid, with progressive resistance.

SHOCK preventor suppresses the SHOCK on fast motor spin-up of centrifugals,
when a metered resistance, looping back to inlet, has not been provided.

SHOCK preventor arresting the flow gradually, so preventing water hammer,
by prolonging the period of slow down.

SHOCK preventor are used for compensating volume on temperature variations,
giving excess volume somewhere to go without a large pressure increase.

Sudden pump shut down and no "bang" from the back flow implosion

request for quotation

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Shock preventors reduce the chance of loss of seal integrity



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Surge Arresters / Pipeline Water Hammer | Contact Information
absorbing the hammer from rapid valve shut off provide a soft volume for the flow to go into, so that time is increased is which deceleration can occur air or N2 pad, Bar or PSI Mass flow kg/sec or volume flow plus SG head, supply length, diameter delta p of restriction, viscosity cP valve opening time after pump turn off pump spin down time after valve closure centrifugal compressibility in parts of a liter per bar, pressure change average diameter pipe length elasticity of pipe wall impeller diameter valve closure time pressure resistance at end steel, concrete, PVC this is not pressure pulsation, the "repeat" of the pressure wave, is just the time that it takes to go the end of the pipe and reflect back rapid valve closure hammer graphics, oscillograph plots, full data requirements, courtesy pulsation analysis and valve slams in 0.1 secs / 100ms fast pump startup, with less surge & shock reduce the force required to accelerate the mass in the pipe system. by providing an accumulator to enable a "soft start" air or N2 Nitrogen Pad, Bar or PSI Mass flow kg/sec or volume flow and SG head, supply length, diameter delta p of restriction, viscosity cP centrifugal impeller diameter Compressibility in parts of a liter per bar, pressure change. Valve opening time after pump turn off Pump spin down time after valve closure Average Diameter Pipe Length Elasticity of pipe wall Steel, Concrete, PVC Pressure resistance at end Again this is not pressure pulsation. If this was pressure pulsation, then the height of each pressure peak, would be near identical. The 5 Hz. frequency is the signature from the length of the pipe with this compressibility of the liquid. Pump Start-up Surge into a pipe that is full graphics, oscillograph plots, full data requirements, courtesy pulsation analysis and pipeline surge/shock prediction service. sudden pump shut-down and no "bang" from the back flow implosion when pump is stopped, momentum continues the flow, making a void after the pump, which causes back-flow; provide a catchment for this to prevent instant arresting from damaging the pump, valves, and pipe air or N2 Nitrogen pad, bar or PSI mass flow kg/sec or volume flow from pump and SG head, supply length, diameter delta p of restriction, viscosity cP centrifugal valve opening time after pump turn off pump spin down time after valve closure RPM impeller diameter compressibility in parts of aliter per bar, pressure change. average diameter pipe length elasticity of pipe wall pressure resistance at end graphics, oscillograph plots, full data requirements, courtesy pulsation analysis and pipeline surge/shock prediction service. Liquid Dynamics Int. Inc. & Ltd. Dissipative is: The pipe being small enough to scrub energy out of the pressure wave, and then to give it up to the atmosphere in the form of heat. From this we learn that it is unwise to oversize the pipes if we need pressure stability. Shut-down back-flow bang flows away from pump momentum pulls a vacuum accelerates back to fill the void comes to a halt to email the minimum essental details to 1 of the shockguards below, please click here ShockGuard Limited ShockGuard USA NOTA BENE: Equipment offered will probably not be suitable for your particular purpose unless all the major parameters of your system are stated in order to enable a selection suction side these times have an exponential effect Air or N2 nitrogen pad, Bar or PSI head + feer or lift - meters supply length supply diameter delta p of any supply restrictions valve opening time after pump turn off pump spin down time after valve closure fast closing block valve closure time average diameter pipe length pressure resistance at end elasticity of pipe wall compressibility in parts of a liter per bar mass flow kg/sec or volume flow from pump and SG viscosity cP grams cm/3 mdmt compatible materials Metel, Elastomer