ShockGuard
Shock Guard
 Fluid Flow Control Animations
Fluid Flow Control Animations
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Surge Alleviators
Surge Preventers help prevent toxic spills
Surge Preventer Dimensional Drawing

Shock and Surge Preventers Installations
Pipeline Shock, Surge, and Water Hammer Device Installation

SURGE PREVENTERS

Surge preventers for evening out the surge when your pumps are switched on,
these preventers of surge are connected close after pump outlet check valve.

Surge preventers for suppression of a surge in piping with jerking fluids,
work by cushioning the mass oscillation to stabilize the reciprocation.

Surge preventers stop transient from valve slam, quick isolation,
are of greatest effect, put on a Tee in front of the slammer.

Surge preventers damping system over-pressure during quick start-up,
by being in place of flow back bypasses, normally returning to source.

Surge preventers attenuate hammer from reverse flow on sudden shut-down,
by being increasing resistances to the quantity of fluid coming back.

Surge preventers suppress the surge from fast motor spin-up of rotary pumps,
when a controlled throttle, returning to inlet, is not in circuit.

Surge preventers alleviates fluctuating flow gradually, preventing hammer,
by progressively arresting the liquid; IE over more time.

Surge preventers often used in compensation for falling temperatures,
so that there is a place for some to come from when the volume decreases.

SURGE PREVENTER

Surge preventer suppresses the surge from pump motor spin-up and pipe shake.
when there is no controlled throttle returning to inlet, in circuit.

Surge preventer alleviates fluctuating flow gradually, preventing hammer,
by progressively slowing the liquid; EX, a time increase reduces surge level.

Surge preventer applications compensating for liquid expansion by temperature
, so that there is a place for some to go into when system increases.

Surge preventer for suppressing a flow surge in pipe that is being shaken,
stops the vibration by de-tuning the nodes, softness lowering the frequency.

Surge preventer for prevention of surges if pumps are switched on suddenly. a
preventer of surges is placed close to the pump outlet .

Surge preventer dampens system peak pressures whilst quickly starting-up, when
placed instead of a back flow bypass, which would returning the instantaneous
excess.

Surge preventer reduces transients from quick valve closure, safety shut-down
are of greatest effect, put on a Tee in front of the slammer.

Surge preventer attenuates water hammer from reverse flow immediate stopping,
by increasing cushion resistances to the returning quantity of fluid.


Shock, Surge and Water Hammer Device Dimensional Drawings PVC or PP Polypropylene Cold Forged Elastomer Carbon Steel Process Liquid Air or N2 Nitrogen Dimensional Drawings for other devices that address shock, surge, and water hammer 316 L Stainless Steel Liquid in elastomeric bladder Air in huge sack Flow-Thru Flex-Tube Diaphragm Nitrogen in Gas Bag Flow through rolling bladder membrane PTFE Flexflon diaphragm and 316 stainless steel shell no moving parts metal membrane no diaphragm, no bladder, all metal parts ShockGuard Surge Alleviators Surge Alleviater Surge Preventer Surge Arrester Surge Absorber Surge Suppresser Surge Attenuater Surge Suppressor Surge Attenuator Surge Alleviator Surge Preventor
Accumulators, Pulsation Analysis, Surge Alleviators, and Pulsation Dampeners



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ShockGuard / Pipeline Surge Prevention | Contact Information
Graphics, ocillograph plots, full data requirements, courtesy pulsation analysis and pipeline surge/shock prediction service Liquid Dynamics Int. Inc and Ltd. To stop the hammer from rapid valve closings provide a soft volume for the flow to go into, so that time is increased in which decelaration can occur Air or N2 "Pad", Bar -OR- PSI Mass Flow Kg/Sec -OR- Volume Flow plus SG Head (2+), Supply Length (3), Diameter (4) Delta P of restriction Lift (2-) Valve Opening Time after pump turn off, -OR- Pump spin down time after valve closure. Rise Centrifugal RPM Impeller Diameter Compressibility in parts of a liter per bar, pressure change. Example: Water 50e-6, 19.6e-5, 11.39e-4 Average Diameter Pipe Length Elasticity of pipe wall Steel 2e+11, Concrete 4.2e+10, PVC 2.89e + 9 Valve Closure Time Pressure resistance at end This is not pressure pulsation, the "repeat" of the pressure wave is just the time that it takes to go to the end of the pipe and reflect back. Rapid Valve Closure Hammer Valve Slams in 0.1 Secs / 100ms Graphics, ocillograph plots, full data requirements, courtesy pulsation analysis and pipeline surge/shock prediction service Liquid Dynamics Int. Inc and Ltd Lower surge pressure, from fast pump start reduce the force required to accelerate the mass in the pipe system, by providing an accumulator to enable a "soft start" Air or N2 "Pad", Bar -OR- PSI Mass Flow Kg/Sec -OR- Volume Flow and SG Head (2+), Supply Length (3), Diameter (4) Lift (2-) Delta P of restriction Viscosity cP Centrifugal Pump RPM Impeller Diameter Valve opening time after pump turn off, -OR- Pump spin down time after valve closure Rise Average Diameter Pipe Length Elasticity of pipe wall Fall Pressure resistance at end Compressibility in parts of a liter per bar, pressure change. Example: Water 50e-6, 19.6e-5, 11.39e-4 Example: Steel 2e+11, Concrete 4.2e+10, PVC 2.89+9 Again, this is not pressure pulsation. If this was pressure pulsation, then the height of each pressure peak, would be near identical. The 5Hz 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, ocillograph plots, full data requirements, courtesy pulsation analysis and pipeline surge/shock prediction service Liquid Dynamics Int. Inc and Ltd. Enabling Sudden Pump Shut-Down without end of Back Flow SHOCK 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 form damaging the pump, valves, and pipe. Air or N2 "Pad" Bar -OR- PSI Mass Flow Kg/Sec -OR- Volume Flow from pump and SG Head (2+), Supply Length (3), Diameter (4) Centrifugal Delta P of restriction (10) Viscosity cP Lift (2-) RPM Impeller Diameter Valve Opening Time after pump turn off, -OR- Pump spin down time after valve closure Compressibility in parts of a liter per bar, pressure change. Example Water 50e-6, 19.6e-5, 11.39e-4 Pressure resistance at end Rise Average Diameter Pipe Length Elasticity of Pipe Wall Example: Steel 2e+11, Concrete 4.2e+10, PVC 2.89e+9 Shit-Down Back-Flow Bang in a 150 yard pipe momentum pulls a vacuum flows away from pump comes to a halt Accelerates back to fill the void 9.5 Seconds 1.0 Seconds The Pipe is Dissapative Dissapative 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 ShockGuard Limited ShockGuard USA Suction Side These have an exponential effect Air or N2 "Pad", Bar -OR- PSI Head + Feet 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, Ex. Steel 2e+11 Compressibility in parts of a liter per bar, change. Ex: Water 50e+6 Mass Flow Kg/Sec -OR- Volume Flow from pump & SG Viscosity cP grams/cm3 MDMT Compastible materials Metal Elastomer It is not probable that any equipment offered will be suitable for your desired purpose unless all the major parameters of your system are stated in order to enable a selection Request for quotation Guard against pulsation Guard against excess flow Analysis and Diagnostics Chemical Smooth Flow Pulsation Dampeners Surge Alleviators Flow Fuses and Breather Bags Pulsation Analysis Hydraulic Accumulators Special Pump Control Accumulators Guard against pipeline shock Surge-Preventers prevent pipe fatigue fracture and flange gasket extrusion SchockGard & ShockGuard Surge Preventers help prevent toxic spills Surge Attenuaters, Surge Absorbers, Surge Suppressors, Surge Alleviators, Surge Arrestors and more The JumboFlex range For low and higher temperatures beyond capability of synthetic rubbers and plastics These surge attenuaters smooth damaging pressure spikes in liquids and at temperatures where elastomers are incompatible Glide Ring Stainless Steel Liquid Carbon Steel Air N2 Nitrogen Connection ANSI B16.5 Pressure Gauge flat head boltings vessel open end flange gas bag loading ring tension strap anchor tension straps closure / manway for gas bag loading pre-fill cushion cock vessel body gas bag anti extrusion plate tension strap support loop anti-extrusion plate 2:1 SE Head Nozel and re-enforcement pipeline connection Pipe-line surge preventer typical gas bag of elastomer type for non-corrosive liquids at moderate temperatures Where to install pipe line shock and surge preventers installation positions apply to JUMBOFLEX, SURGEGUARD, FLOATOLATOR, and LIQUIBELLO