Generant RVA ASME Coded Relief Valve, 1/2" MNPT, 22 and 100 PSI

Generant RVA relief valve, 1/2 in MNPT male, ASME coded and National Board certified, with the UV and NB stamps on the valve itself. Two set pressures, 22 psi (1.5 bar) and 100 psi (6.9 bar), both $269.00. This is the valve to fit when the jurisdiction, the AHJ or the insurer asks for an ASME stamp. The brass CRV we also stock is not coded and will not satisfy an inspector who asks for one. The short version Code: ASME BPVC Section XIII, National Board certified, UV and NB stamps on the valve Connection: 1/2 in MNPT male, port code 500B Seal: Fluorosilicone, which is what Generant fits from 20 to 149 psi (1.4 to 10.3 bar), so on both pressures we stock Orifice area: 0.062 sq in (40 sq mm), derated Kd of 0.667 Full rated flow at 110 percent of set pressure. Back pressure to 10 percent has no effect on the setting Temperature: -320 F to 392 F (-196 C to 200 C), per Generant RVA datasheet SA.SL.RVA001.D.6914 Gas service only. On cryogenic media it needs vapor barrier piping upstream Set pressure is factory preset and permanently locked. It is not adjustable Cleaned and packaged for oxygen service per CGA G-4.1 Set pressures and price Set pressure Price Stock 22 psi (1.5 bar) $269.00 Usually in stock 100 psi (6.9 bar) $269.00 Usually in stock We try to always stock these, can sometimes be out of stock due to Generant build schedule. Figure one to two weeks, and the longest we have ever seen is 12 weeks. Generant builds the RVA across a wider range, so email info@nboler.com for a setting we do not list. One installation requirement worth reading twice The RVA is rated for gas service only. On cryogenic media it must be installed with vapor barrier piping upstream, the candy cane. Plumb it straight into liquid and it will not do what the datasheet says, and an inspector will ask. RVA or the brass CRV Generant RVA Generant brass CRV ASME coded Yes, UV and NB stamps No Connection 1/2 in MNPT 1/4 in or 1/2 in MNPT Set pressures 22 and 100 psi (1.5 and 6.9 bar) 10 to 350 psi (0.7 to 24.1 bar) Seal Fluorosilicone Fluorosilicone below 50 psi, PCTFE at 50 psi and above Temperature -320 F to 392 F (-196 C to 200 C) -320 F to 165 F (-196 C to 74 C) Service Gas only, vapor barrier piping on cryogenic media Liquid or vapor at 50 psi (3.4 bar) and above Price $269.00 $84.00 If nobody is asking for a stamp, the CRV is the cheaper part and does the same job. For the high flow relief on a solvent tank or recovery vessel top, the part is the Conrader SRV530 instead. Accuracy, testing and service life Set tolerance: plus or minus 1.45 psi (0.10 bar) below 49 psi (3.4 bar), plus or minus 3 percent at 49 psi (3.4 bar) and above, to EN ISO 4126-1 Every valve is 100 percent factory tested for crack and reseat before it ships Replace every 12 months. An ASME relief on a large vessel should not be lifting at all If yours has vented, look at it now rather than at its next interval Background: Cryogenic relief valve selection and ASME vs non-ASME extraction equipment All published ratings on this page are transcribed from Generant RVA datasheet SA.SL.RVA001.D.6914. Ships from Bend, Oregon.