 PDF PG139 pf-4 Pulsation Damper Operation Printable Version
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Pulsation Dampers - Pre-Filling With Nitrogen Gas at Elevated Pressures
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TO REDUCE THE OVERALL COST OF DAMPER + PRE-FILLING EQUIPMENT IN THE RANGE 2,000 psi (140 bar) up to 10,000 psi (690 bar), it is often less expensive to oversize the damper. |
For example, from a readily available N2 bottle at 2,000 psi in summer, or 1,900 in winter; to use in a 9,500 psi (650 bar) system:- You can oversize by the ratio of 1,900 to 9,500 psi, I.E. 5:1, make the damper 5x larger. When your system reaches 9-5K, the N2 will be 20% of its starting volume, but as the damper is 500% oversize, you will have the smoothness specified, but you will not need a gas intensifier pump as shown below.
ABOVE 10K psi THE METHOD SHOWN BELOW IS ALMOST ESSENTIAL. |
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NOTE:- The undercarriage "shock struts" of aircraft, are filled from 6000 psi nitrogen cylinders, as are BOP accs, on oil rigs, so HP N2 does exits.
THE EQUIPMENT PART NUMBERS AND SOURCES NOTED ABOVE ARE WHAT WE USE IN OUR SHOP. WE HAVE FOUND THEM TO BE SATISFACTORY, BUT AS THEY ARE NOT PRODUCED UNDER OUR QA SYSTEM, WE DO NOT WARRANT THEIR SAFETY OR LIFE. |
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