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Accessories and OptionsSoft seal selectionSoft seal selectionAbbrevationASTM 1418Trade name(Designation)Codeletter1)OptionCodeTminTmax[°C] [°F] [°C] [°F]Application 2)O-ringCR Neoprene ® K J21 -40 -40 100 212Parafin oil, silicone oil and grease, water andwaterbased solvents, refrigerants, ozoneNBRBuna-N ®(Nitrile-Butadiene)N J30 -25 -13 100 212 Hydraulic oil, vegetable and animal grease and oilEPDMBuna-EP ®(Ethylene-Propylene-Dine)D J22 -45 -49 150 302Hot water and superheated steam up to 150 °C,302 °F, some organic and inorganic acids,silicone oil and grease, FDA compliantFKMViton ®(Fluorocarbon)L J23 20 -4 180 356High temperature service (no superheated steam),mineral oil and grease, silicone oil and grease,vegetable and animal grease and oil, ozone, FDAcompliant compound available on requestFFKMSealing plateSPPCTFEPTFEKalrez ®(Perfluo)VESPEL SP-1 ®(Polyimide)KEL-F ®(Polychlorotrifluoroethylene)Teflon ®(Polytetrafluoroethylene)Other than listedC J20 0 32 250 482T J49 -270 -454 300 572G J48 -270 -454 204 400A J44 -184 -300 150 302 Nearly all chemicalsXFor other materials please contact yourlocal representative or sales@leser.comNearly all chemicals, standard compound isKalrez ® 6375 with steam resistance, FDA compliantcompound available on requestHigh temperature and high pressure applications(no steam), for chemical resistance refer tomanufacturers guideCryogenic and refrigeration applications, flammablemedia applications, (e.g. gaseous oxygen) up to50 bar, 725 psig at 60 °C, 140 °F1)The code letters will be stamped on the disc (Item 1).2)Pressure and temperature service must be considered in any case.Chemical resistance information is supplied by the O-ring manufacturer. LESER can not take any warranty.Options99/10 LWN 480.01-E
Accessories and OptionsSoft sealSoft seal discMaterialSet pressure and size limitsPressure rangePressure rangemin.max.[bar] [psig] [bar] [psig]OrificeCRNBREPDMFKMFFKM102 1480 D – K75,8 1100 L – M0,3 4 68,9 1000 N – P41,3 600 Q20,6 300 R – TVESPELSP-1 ® 10 150 400 5800 D – GKel-F ® 1 15 300 4350 D – TTeflon ® 1 15 10 145 D – TMaterial selectionSealing plateSet pressure p[bar g][psig]J49VespelSP-1J48PCTFEKel-FJ44PTFE-FDATeflon350300250200150100507643513626290021751450[°F]-508-418-328 -238 -148 -58 50 725 122 212 302 392 482[°C]-300 -250 -200 -150 -100 -50 0 50 100 150 200 250Temperature tTrademarksSoft sealRegistered trademarksCompanyBuna-N ® , Teflon ®Viton ® , VESPEL SP-1 ®Neoprene ® , Kalrez ®Buna EP ®Kel-F ®DuPontBayer3MOptionsLWN 480.01-E99/11
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APIFlanged Safety Relief ValvesSeri
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ContentsChapter/PageGeneral 00/01Ap
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General InformationGeneralApplicati
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Valve finderHow to find the right A
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How to useSelection chartsGeneralTh
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How to useGeneral8Base of calculati
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LEOLGeneralThis table is based on t
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TypeType 526Type 526Packed lever H4
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Type 526Conventional designItemMate
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Type 526Balanced bellows designMate
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Type 5264 5 6Options Documentation
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Type 526Article numbers - OverviewA
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d 0 = Actual orifice diameterA 0 =
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d 0 = Actual orifice diameterA 0 =
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Type 526WeightsUS UnitsBonnetallLif
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Type 526Orifice DArticle numbers, d
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Type 526Orifice DPressure temperatu
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Type 526Orifice EArticle numbers, d
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Type 526Orifice EPressure temperatu
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Type 526Orifice FArticle numbers, d
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Type 526Orifice FPressure temperatu
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Type 526Orifice GArticle numbers, d
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Type 526Orifice GPressure temperatu
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Type 526Orifice HArticle numbers, d
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Type 526Orifice HPressure temperatu
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Type 526Orifice JArticle numbers, d
Page 53 and 54:
Type 526Orifice JPressure temperatu
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Type 526Orifice KArticle numbers, d
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Type 526Orifice KPressure temperatu
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Type 526Orifice LArticle numbers, d
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Type 526Orifice LPressure temperatu
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Type 526Orifice MArticle numbers, d
Page 65 and 66: Type 526Orifice MPressure temperatu
Page 67 and 68: Type 526Orifice NArticle numbers, d
Page 69 and 70: Type 526Orifice NPressure temperatu
Page 71 and 72: Type 526Orifice PArticle numbers, d
Page 73 and 74: Type 526Orifice PPressure temperatu
Page 75 and 76: Type 526Orifice QArticle numbers, d
Page 77 and 78: Type 526Orifice QPressure temperatu
Page 79 and 80: Type 526Orifice RArticle numbers, d
Page 81 and 82: Type 526Orifice RPressure temperatu
Page 83 and 84: Type 526Orifice TArticle numbers, d
Page 85 and 86: Type 526Orifice TPressure temperatu
Page 87 and 88: Type 526Flange facingsIndication St
Page 89 and 90: Orifice900 x 300 1500 x 300 2500 x
Page 91 and 92: Type 526Spare parts - Disc (Item 7)
Page 93 and 94: Type 526Spare parts - Stainless ste
Page 95 and 96: Type 526Spare parts - Gasket Body /
Page 97 and 98: Type 526Spare parts recommendations
Page 99 and 100: Type 526ApprovalsApprovalsOrifice D
Page 101 and 102: Type 526Capacities - SteamCapacitie
Page 103 and 104: Type 526Capacities - AirCapacities
Page 105 and 106: Type 526Capacities - WaterCapacitie
Page 107 and 108: Accessoriesand OptionsContentsChapt
Page 109 and 110: Accessories and OptionsCaps and lev
Page 111 and 112: Accessories and OptionsCaps and lev
Page 113 and 114: Accessories and OptionsMetal seat -
Page 115: Accessories and OptionsSoft seal di
Page 119 and 120: Accessories and OptionsBalanced bel
Page 121 and 122: Accessories and OptionsLift indicat
Page 123 and 124: Accessories and OptionsHeating jack
Page 125 and 126: Accessories and OptionsO-ring dampe
Page 127 and 128: Fax OrderPlease send your request t
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