{"product_id":"generant-rva-asme-relief-valve-half-inch-mnpt","title":"Generant RVA ASME Coded Relief Valve, 1\/2\" MNPT, 22 and 100 PSI","description":"\u003cp\u003eGenerant 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 and 100 psi, both $269.00.\u003c\/p\u003e\n\u003cp\u003eThis 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.\u003c\/p\u003e\n\n\u003ch3\u003eThe short version\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCode: ASME BPVC Section XIII, National Board certified, UV and NB stamps on the valve\u003c\/li\u003e\n\u003cli\u003eConnection: 1\/2 in MNPT male, port code 500B\u003c\/li\u003e\n\u003cli\u003eOrifice area: 0.062 sq in (40 sq mm), derated Kd of 0.667\u003c\/li\u003e\n\u003cli\u003eFull rated flow at 110 percent of set pressure. Back pressure to 10 percent has no effect on the setting\u003c\/li\u003e\n\u003cli\u003eTemperature: -320 F to 200 F (-196 C to 93 C)\u003c\/li\u003e\n\u003cli\u003eGas service only. On cryogenic media it needs vapor barrier piping upstream\u003c\/li\u003e\n\u003cli\u003eSet pressure is factory preset and permanently locked. It is not adjustable\u003c\/li\u003e\n\u003cli\u003eCleaned and packaged for oxygen service per CGA G-4.1\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSet pressures and price\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSet pressure\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003cth\u003eStock\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e22 psi\u003c\/td\u003e\n\u003ctd\u003e$269.00\u003c\/td\u003e\n\u003ctd\u003eBuilt to order\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100 psi\u003c\/td\u003e\n\u003ctd\u003e$269.00\u003c\/td\u003e\n\u003ctd\u003eBuilt to order\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eWe do not hold these on the shelf. 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.\u003c\/p\u003e\n\n\u003ch3\u003eOne installation requirement worth reading twice\u003c\/h3\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\n\u003ch3\u003eRVA or the brass CRV\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth\u003eGenerant RVA\u003c\/th\u003e\n\u003cth\u003eGenerant brass CRV\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eASME coded\u003c\/td\u003e\n\u003ctd\u003eYes, UV and NB stamps\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection\u003c\/td\u003e\n\u003ctd\u003e1\/2 in MNPT\u003c\/td\u003e\n\u003ctd\u003e1\/4 in or 1\/2 in MNPT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSet pressures\u003c\/td\u003e\n\u003ctd\u003e22 and 100 psi\u003c\/td\u003e\n\u003ctd\u003e10 to 350 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eService\u003c\/td\u003e\n\u003ctd\u003eGas only, vapor barrier piping on cryogenic media\u003c\/td\u003e\n\u003ctd\u003eLiquid or vapor at 50 psi and above\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e$269.00\u003c\/td\u003e\n\u003ctd\u003e$84.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eIf 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.\u003c\/p\u003e\n\n\u003ch3\u003eAccuracy, testing and service life\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSet tolerance: plus or minus 1.45 psi below 49 psi, plus or minus 3 percent at 49 psi and above, to EN ISO 4126-1\u003c\/li\u003e\n\u003cli\u003eEvery valve is 100 percent factory tested for crack and reseat before it ships\u003c\/li\u003e\n\u003cli\u003eReplace every 12 months. An ASME relief on a large vessel should not be lifting at all\u003c\/li\u003e\n\u003cli\u003eIf yours has vented, look at it now rather than at its next interval\u003c\/li\u003e\n\u003cli\u003eBackground: \u003ca href=\"\/blogs\/tech\/cryogenic-relief-valve-selection\"\u003eCryogenic relief valve selection\u003c\/a\u003e and \u003ca href=\"\/blogs\/tech\/asme-vs-non-asme-extraction-equipment-what-owners-and-operators-need-to-know\"\u003eASME vs non-ASME extraction equipment\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eShips from Bend, Oregon.\u003c\/p\u003e","brand":"Generant","offers":[{"title":"22 psi","offer_id":50870312992967,"sku":"RVA-500B-FS-22","price":269.0,"currency_code":"USD","in_stock":true},{"title":"100 psi","offer_id":50870329802951,"sku":"RVA-500B-FS-100","price":269.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/www.nboler.com\/products\/generant-rva-asme-relief-valve-half-inch-mnpt","provider":"N.B.Oler","version":"1.0","type":"link"}