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Lifting Levers

Lifting Levers

Lifting Levers

We're having a discussion about requirements for lift levers on RVs.  ASME BPVC Sec VIII Div 1 para UG-136(a)(3) states "Each pressure relief valve on air, water over 140°F (60”C), or steam service shall have a substantial lifting device . . .".  We interpret the "air" fluid as being ambient air with potential high humidity, and condensate in an air receiver tank.  Our service is research air, filtered and dried to a -90F dewpoint.  We  have never lifted lift levers in our system; we remove RVs and bench test periodically either in-house, or at a VR shop for Code valves.  Lift levers make valves expensive.  I noted in an API RP520 task force meeting (4/20/2005) that "Nobody in room understands the technical justification for the lifting levers. "  Since we are testing valves on the unit or on the bench (per NBIC 23, RB3550), should we require lifting levers?


RE: Lifting Levers

I guess the simple answer is, if you need to meet ASME requirement, you need a lift lever for air service (and hot water and steam).

"Do not worry about your problems with mathematics, I assure you mine are far greater."   
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RE: Lifting Levers

Thanks.  That's exactly what I'm looking for.  Much appreciation!


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