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Fluid Flow Control Animations
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Pulsation Dampeners - Double Layer, 2 Sheet PTFE, Diaphragm Metering Pumps

Pulsation Dampeners - Diaphragm Metering Pumps



Pulsation-Dampeners.com
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Click on the picture of the damper below to see how it works and is assembled, animated.
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Double Layer, Sandwich, 2 sheet PTFE Diaphragm Metering Pumps For Hazardous & High Pressure, matched with double layer flexflon dampeners that have secondary containment sealing, and hazard alert port option between the layers. A common problem with diaphragm heads Warm liquids, and liquids with low SG and low cP are compressible. The liquid in the pump head has to expand down from system discharge pressure as does the diaphragm drive fluid until both, about 8 times the stroke volume, have reached near atmospheric pressure before the suction check valve can even begin to open. Damping these pumps require a pressure shock wave interceptor. Do they tell you to use a packed plunger pump if possible? The expansion process with diaphragm head pumps uses up to 40% of suction stroke before the pump can start to fill. In that lost time the pump plunger has accelerated to near 3 or more times its average speed. Therefore, when the check valve does open the suction system has to jump from zero velocity up to three times the mean velocity on soft liquids. Contrary to manufacturers recommendations the pump performs well for years running at near twice the stroke rate - twice the flow rate fitted with FLEXORBER-LP suction dampener (A) and FLEXORBER-HP (B) discharge dampener. Although the dampeners (A) & (B) are 15 times larger volume than the pump head and very similar in construction, they cost less than a pump head. Dampeners are Close Coupled Shock Wave and flow fluctuation free with FlexOrber HP (FLo) and LP (SoG) dampener interceptors Hazard class tell tale port from between primary seal and secondary containment seal Huge dead volume of compressible drive fluid 4 times pumped volume of compressible system liquid, causes lost motion, resulting in shocks This is called velocity jump from low volumetric efficiency compressibles causes massive & instant pressure fall producing negative waves - shock. A negative pressure wave - shock - travels back up the supply system - at about 3000 miles per hour. They break the liquid column into slugs of liquid spaced with air and gas pockets. Now the supply line feeds the pump intermittently, liquid-gas-liquid-gas-bubbles, slush. The pump efficiency further, has no chance to maintain any metering accuracy. keep it simple, use plunger pumps, & simple dampeners. Pump Discharge After compressing and compressing the liquid, the velocity jump results in shock from jerking the mass from zero up to 3 times normal velocity, plus instantaneous decompression into the system. Shocks traveling faster than a bullet. The shocks may also amplify by resonation cracking the pipe. The High Value Answer: Shocks can not bypass – the FlexOrber dampener range FLO, & FL-LP for suction Remarkable low cost results 1) Immediate return to the pump vendors 1% metering accuracy and often better. 2) Higher flow rates. The pump can now run 50% faster & transfer far more liquid. 3) Instruments and control systems function and the pipe system stops fracturing. Direct supply, unfiltered information, the right data, save 80% markup with open communication Dampeners that do, flow goes through, pressure pulses do not.