PulseGuard Pulsation Dampeners

Fluid Flow Control Animations
PulseGuard Pulsation Dampeners
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PipeHugger LP HP and Lined Pulsation Dampener Maintenance

Service, disassembly and re-assembly of PipeHugger HP Pulsation Dampeners
PulseGuard Pulsation Dampeners PipeHugger Pulsation Dampeners
Part Number and identification: Dampener Type/Volume /Design Pressure/Membrane Diameter – Material / Connection / Metal

Cushion Prefill Drive Bonnet End Cushion Prefill Valve part number 2581, shown below the bonnet, can only be replaced from inside the prefill drive bonnet by disassembly. Needs chuck part number 5560 Liquid in bladder When liquid is inside a membrane we say “bladder” as opposed to balloon or “gas bag”. With liquid inside, nitrogen is in the drive bonnet or “vessel”, the vessel does not have to be from exotic material. The pip of incompressible elastomer inside center of the rolling diaphragm shown above, is located within the undercut of the anti-extrusion plate below. A blunted and smoothed prodder and hollow ended pusher are used to push at “A” and feed pip into “B”. 1. Nitrogen Prefilling Valve 2. Nitrogen Bonnet 3. Bonnet Head 4. Segmental (spiral) Lock Rings 5. Liquid end plug 6. Diametral “O” seal Anti-extrusion plate Anti-extrusion plate Bladder (liquid inside) anti-extrusion plate bladder (liquid inside) The following materials are normal inventory or short lead time: N = Butadiene Acrylo Nitrile E = EthylenePropylene TerPolymer V = Fluoro Carbon elastomer Low & high temperature and food/drug versions available Corner filling ring (if required) Retaining plates To order spares: SK = spares kit including seals and pre-fill valve PulseGuard Inc. wishes to review its products; we will install a spares kit and recertify your dampener for the same cost as a spares kit. IF only $40.00 has been saved on the original purchase price, by using a “pin core valve”, you may want to have the factory convert your dampener to the “strut valve”. Please call for a return material authorization number – an “RMA” or “RGA” Pin core valves are just check valves and provide no control. They require a $250 precharging assembly and a $500 cylinder regulator. And you cannot stop what’s in the hose going into the dampener. Cushion Prefill Drive Bonnet End Requires no special tool to open or close. The 9019-c valve has been proven by 25 years use on the landing gear of every aircraft on which you have flown. Use this valve. Do not attach anything, always put the seal cap back on. Use of other valves invalidates warranty. In common with valves that have a “core pin” M28xM8 valve requires special pre-filling (charging) tool. Part number 001stp28. The cost often far exceeds that of the dampener. For use to 6000 psi: 9019-c nitrogen prefill valve made of 304 stainless steel For use to 15000psi: Eurovalve Liquid in bladder When liquid is inside a membrane we say “bladder” as opposed to balloon or “gas bag”. With liquid inside, nitrogen is in the drive bonnet or “vessel”, the vessel does not have to be from exotic material. Bladder stabilization webs for anti-extrusion plate alignment The pip of incompressible elastomer inside center of the rolling diaphragm shown above, is located within the undercut of the anti-extrusion plate below. A blunted and smoothed prodder and hollow ended pusher are used to push at “A” and feed pip into “B”. Slashing the cost of exotic specifications Elastomer liner same material as bladder but harder End Plug only is made of high cost material such as tantalum, etc.

 



Fluid Flow Control Pulsation Dampeners