Type 455, 456. Facts. Flanged Safety Relief Valves spring loaded. The-Safety-Valve.com. US Units
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1 Type 455, 456 Flanged Safety Relief Valves spring loaded US Units Facts The-Safety-Valve.com LWN E D
2 40 Cap H2 19 Lock nut 18 Adjusting screw 16 Upper spring plate 9 Bonnet 12 Spindle 54 Spring 14 Split ring 17 Lower spring plate 55 Stud 56 Nut 8 Guide with bushing 22 Lift stopper 66 Screw 57 Ball 61 Ball 7 Disc 5 Nozzle 1 Body 74
3 Materials Item Component Type 4552 / 4562 Type Body 5 Seat 7 Disc 8 Guide with bushing 9 Bonnet 12 Spindle 14 Split ring 16 / 17 Spring plate 18 Adjusting screw with bushing 19 Lock nut 22 Lift stopper 40 Cap H2 54 Spring standard Spring optional 55 Stud 56 Nut 57 Ball 61 Ball 66 Screw Please notice: SA 216 WCB SA 351 CF10M Hardened stainless steel , Chrome or carbon steel tenifer Chrome steel (Open bonnet ), Ductile Gr , SA 216 WCB , , SA 351 CF8M, SA 479, 316Ti Chrome steel Steel PTFE PTFE Chrome steel PTFE PTFE Steel SA , , Carbon steel Stainless steel Stainless steel 8M 8M Graphite / Graphite / Graphite / 316 Graphite / Hardened stainless steel 316 Modifications reserved by LESER. LESER can upgrade materials without notice. Every part can be replaced by other material acc. to customer specification. 75
4 Balanced bellows design 40 Cap H2 19 Lock nut 18 Adjusting screw 16 Upper spring plate 9 Bonnet 12 Spindle 54 Spring 14 Split ring 17 Lower spring plate 55 Stud 56 Nut 8 Guide with bushing 11 Bonnet spacer 15 Bellows 22 Lift stopper 66 Screw 57 Ball 61 Ball 7 Disc 5 Nozzle 1 Body 76
5 Balanced bellows design Materials Item Component Type 4552 / 4562 Type Body 5 Nozzle 7 Disc 8 Guide with bushing 9 Bonnet 11 Bonnet spacer 12 Spindle 14 Split ring 15 Bellows 16 / 17 Spring plate 18 Adjusting screw with bushing 19 Lock nut 22 Lift stopper 40 Cap H2 54 Spring Standard Spring Optional 55 Stud 56 Nut 57 Ball 61 Ball 66 Screw Please notice: SA 216 WCB SA 351 CF10M Hardened stainless steel , Chrome or carbon steel tenifer Chrome steel or , , Ductile Gr or SA 216 WCB SA 351 CF8M, SA 479, 316Ti Carbon steel Chrome steel Ti 316Ti Steel PTFE PTFE Chrome steel PTFE PTFE Steel SA , , Carbon steel Stainless steel Stainless steel B M 8M Graphite / Graphite / Graphite / 316 Graphite / Hardened stainless steel 316 Modifications reserved by LESER. LESER can upgrade materials without notice. Every part can be replaced by other material acc. to customer specification. 77
6 Article numbers DN I+O 25 x x x x 150 Valve size 1" x 2" 2" x 3" 3" x 4" 4" x 6" Actual Orifice diameter d 0 [mm] Actual Orifice area A 0 [mm 2 ] Body material: (WCB) Bonnet H2 Art. No closed H3 Art. No H4 Art. No open H3 Art. No Body material: (CF10M) Bonnet H2 Art. No closed H4 Art. No Type 455 Plain lever H3 Open bonnet Type 456 Cap H2 Closed bonnet Type 456 Packed lever H4 Closed bonnet Type 456 Plain lever H3 Closed bonnet Type 456 Cap H2 Closed bonnet Balanced bellows design 78
7 Dimensions and weights US Units DN I+O 25 x x x x 150 Valve size 1" x 2" 2" x 3" 3" x 4" 4" x 6" Actual Orifice diameter d 0 [inch] Actual Orifice area A 0 [inch 2 ] Weight [lbs] with bellows Center to face Inlet a 4 13 / / / / 4 [inch] Outlet b (PN 40) 4 23 / / / / 4 Measure Used to find bolt length [inch] for inlet flange Outlet b (PN 63) 4 23 / / / / 16 s 1 3 / / / / 32 Height (H4) Standard H max / / / / 16 [inch] Bellows H max / / / / 4 Support brackets A 5 1 / / / / 32 [inch] B 4 11 / / / 32 (drilled only on request, C Ø 9 / 16 Ø 9 / 16 Ø 23 / 32 Ø 23 / 32 Option code H42) D 5 7 / / / / 32 Body material: (WCB) E 23 / / / / 4 ANSI Flange Inlet CL Class 1) Outlet CL CL150 Body material: (CF10M) ANSI Flange Inlet CL Class 1) Outlet CL CL150 1) Standard flange rating. For other flange drillings please refer to page 83. H E D H C a s b B A a b Support brackets Balanced bellows design s 80
8 Pressure temperature ratings US Units DN I+O 25 x x x x 150 Valve size 1" x 2" 2" x 3" 3" x 4" 4" x 6" Actual Orifice diameter d 0 [inch] Actual Orifice area A 0 [inch 2 ] Body material: (WCB) ANSI Flange Inlet CL Class 1) Outlet CL CL150 Minimum set pressure p [psig] S/G/L Min. set pressure 2) p [psig] S/G/L standard bellows Min. set pressure low press. bellows p [psig] S/G/L on request Maximum set pressure Max. set pressure with special spring p [psig] S/G/L p [psig] S/G/L Temperature min. [ F] -121 acc. to DIN EN max. [ F] +842 Temperature min. [ F] -20 acc. to ASME max. [ F] +800 Body material: (CF10M) ANSI Flange Inlet CL Class 1) Outlet CL CL150 Minimum set pressure p [psig] S/G/L Min. set pressure 2) p [psig] S/G/L standard bellows Min. set pressure low press. bellows p [psig] S/G/L on request Maximum set pressure p [psig] S/G/L Max. set pressure with special spring p [psig] S/G/L Temperature min. [ F] -121 acc. to DIN EN max. [ F] +842, > 842 F ---> Please use Type 457/458 Temperature min. [ F] -20 acc. to ASME max. [ F] +842, > 842 F ---> Please use Type 457/458 1) For flange rating class 150 the pressure temperature ratings according to ASME ANSI B16.34 apply. 2) Min. set pressure standard bellows = Max. set pressure low pressure bellows. 82
9 Available Options Heating jacket H29, H30: Couplings G 3 / 8, G 3 / 4 H31, H32: Flanges DN 15, DN 25 Drain hole J18: G 1 / 4 J19: G 1 / 2 Open bonnet See article number O-ring disc J20: FFKM C J21: CR K J22: EPDM D J23: FKM L Stainless steel bellows J68: Open bonnet J78: Closed bonnet Conversion kit for stainless steel bellows on request Screwed cap H2 H2 Plain lever H3 H3 Packed lever H4 H4 Test gag J69: H4 J70: H2 Lift indicator J39: Adaptor H4 J93: Lift indicator O-ring damper H2 J65 O-ring damper H4 J66 86
Type 441 ANSI 442 ANSI. Facts. Flanged Safety Relief Valves spring loaded. The-Safety-Valve.com. US Units
Type 441 ANSI 442 ANSI Flanged Safety Relief Valves spring loaded US Units Facts The-Safety-Valve.com LWN 462.05-E 462.01-D Conventional design 40 Cap H2 18 19 16 Adjusting screw Lock nut Upper spring
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