Type 457, 458. Facts. Flanged Safety Relief Valves spring loaded. The-Safety-Valve.com. Metirc Units LWN E

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1 Type 457, 458 Flanged Safety Relief Valves spring loaded Metirc Units Facts The-Safety-Valve.com LWN E

2 40 Cap H2 19 Lock nut 18 Adjusting screw 16 Upper spring plate 12 Spindle 9 Bonnet 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 88

3 Materials Item Component Type 4572 / 4582 Type 4577 / 4587 Type Body 5 Nozzle 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 217 WC6 SA 351 CF10M stellited stellited stellited 316L stellited 316L stellited 316L stellited Hardened stainless steel Hardened stainless steel 316L , Chrome or carbon steel tenifer Chrome steel (Open bonnet ), Ductile Gr , SA 216 WCB Modifications reserved by LESER. LESER can upgrade materials without notice. Every part can be replaced by other material acc. to customer specification , Chrome or carbon steel tenifer Chrome steel (Open bonnet ), Ductile Gr , SA 216 WCB L , , SA 351 CF8M, SA L, 316Ti L 316L 316L Chrome steel Chrome steel 316L Steel Steel 316L PTFE PTFE PTFE Chrome steel PTFE Chrome steel PTFE 316L PTFE Steel Steel 316L L 316L 316L SA L 316L , , , , Carbon steel Carbon steel Stainless steel Stainless steel Stainless steel B8M B8M B8M 8M 8M 8M Graphite / Graphite / Graphite / Graphite / 316L Graphite / 316L Graphite / 316L Hardened stainless steel Hardened stainless steel 316 B8M B8M B8M 89

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 22 Lift stopper 15 Bellows 66 Screw 57 Ball 61 Ball 7 Disc 5 Nozzle 1 Body 90

5 Balanced bellows design Materials Item Component Type 4572 / 4582 Type 4577 / 4587 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 SA 216 WCB SA 217 WC6 SA 351 CF10M stellited stellited stellited 316L stellited 316L stellited 316L stellited Hardened stainless steel Hardened stainless steel 316L , Chrome or carbon steel tenifer Chrome steel , Chrome or carbon steel tenifer Chrome steel or or Ductile Gr or SA 216 WCB Ductile Gr or SA 216 WCB L , , SA 351 CF8M, SA L, 316Ti Carbon steel Carbon steel 316L L 316L 316L Chrome steel Chrome steel 316L Ti 316Ti 316Ti Steel Steel 316L PTFE PTFE PTFE Chrome steel PTFE Chrome steel PTFE 316L PTFE Steel Steel 316L L 316L 316L SA L 316L , , , , Carbon steel Carbon steel Stainless steel Stainless steel Stainless steel B16 B16 B8M M 7M 8M Graphite / Graphite / Graphite / Graphite / 316L Graphite / 316L Graphite / 316L Hardened stainless steel Hardened stainless steel 316 B8M B8M B8M Bitte beachten: LESER behält sich Änderungen vor. LESER kann, ohne vorherige Benachrichtigung, höherwertige Materials einsetzen. Jedes Bauteil kann entsprechend der Kundenspezifikation in einem anderen Werkstoff ausgeführt werden. 91

6 Article numbers DN I+O 25 x x x x x x 100 Valve size 1" x 2" 1" x 2" 2" x 3" 2" x 3" 3" x 4" 3" x 4" Actual Orifice diameter d 0 [mm] Actual Orifice area A 0 [mm 2 ] Body material: (WCB) Bonnet H2 Art. No H3 Art. No H4 Art. No open H3 Art. No Body material: (WC6) Bonnet H2 Art. No H3 Art. No H4 Art. No open H3 Art. No Body material: (CF10M) Bonnet H2 Art. No H4 Art. No DN I+O 100 x x x x x 250 Valve size 4" x 6" 4" x 6" 4" x 6" 4" x 6" 6" x 10" Actual Orifice diameter d 0 [mm] Actual Orifice area A 0 [mm 2 ] Body material: (WCB) Bonnet H2 Art. No H3 Art. No H4 Art. No open H3 Art. No Body material: (WC6) Bonnet H2 Art. No H3 Art. No H4 Art. No open H3 Art. No Body material: (CF10M) (CF8M) Bonnet H2 Art. No H4 Art. No Type 457 Plain lever H3 Open bonnet Type 458 Cap H2 Closed bonnet Type 458 Packed lever H4 Closed bonnet Type 458 Plain lever H3 Closed bonnet Type 458 Cap H2 Closed bonnet Balanced bellows design 92

7 Dimensions and weights Metric Units DN I+O 25 x x x x x x x x x x x 250 Valve size 1" x 2" 1" x 2" 2" x 3" 2" x 3" 3" x 4" 3" x 4" 4" x 6" 4" x 6" 4" x 6" 4" x 6" 6" x 10" Actual Orifice diameter d 0 [mm] Actual Orifice area A 0 [mm 2 ] Weight [kg] with bellows Center to face 1) Inlet a [mm] Outlet b PN Outlet b PN Outlet b PN Measure [mm] PN s Used to find bolt PN 250 s length for inlet flange PN 400 s Height (H4) Standard H max [mm] Bellows H max Support brackets A [mm] B (drilled only on request, C Ø 14 Ø 14 Ø 14 Ø 14 Ø 18 Ø 18 Ø 18 Ø 18 Ø 18 Ø 18 Ø 18 Option code H42) D Body material: (WCB) E DIN Flange 2) Inlet PN PN PN 40 Body material: (WC6) Outlet PN PN 40 PN 16 DIN Flange 2) Inlet PN PN Outlet PN PN 40 Body material: (CF10M) (CF8M) DIN Flange 2) Inlet PN PN PN 40 Outlet PN PN 40 PN 16 1) Please note: For design with welding flanges attention should be paid to differing center to face dimensions. 2) Standard flange rating. For other flange drillings please refer to page 97. E D C E D DN 25, Valve size 1" C B A s DN , Valve size 2" 6" A s Support brackets Balanced bellows design 93

8 Pressure temperature ratings Metric Units DN I+O 25 x x x x x x x x x x x 250 Valve size 1" x 2" 1" x 2" 2" x 3" 2" x 3" 3" x 4" 3" x 4" 4" x 6" 4" x 6" 4" x 6" 4" x 6" 6" x 10" Actual Orifice diameter d 0 [mm] Actual Orifice area A 0 [mm 2 ] Body material: (WCB) DIN Flange Inlet PN PN PN 40 Outlet PN PN 40 PN 40 Minimum ] S/G/L Min. 1) standard bellows ] S/G/L Min. low press. bellows ] S/G/L on request Maximaler ] S/G/L Max. with special spring ] S/G/L Temperature min. [ C] -85 acc. to DIN EN max. [ C] +450 Temperature min. [ C] -29 acc. to ASME max. [ C] +427 Body material: (WC6) DIN Flange Inlet PN PN Outlet PN PN 40 Minimum ] S/G/L Min. 1) standard bellows ] S/G/L Min. low press. bellows ] S/G/L on request Maximaler ] S/G/L Max. with special spring ] S/G/L Temperature min. [ C] -85 acc. to DIN EN max. [ C] +550 Temperature min. [ C] -29 acc. to ASME max. [ C] +538 Body material: (CF10M) (CF8M) DIN Flange Inlet PN PN PN 40 Outlet PN PN 40 PN 16 Minimum ] S/G/L Min. 1) standard bellows ] S/G/L Min. low press. bellows ] S/G/L on request Maximaler ] S/G/L Max. with special spring ] S/G/L Temperature min. [ C] acc. to DIN EN max. [ C] Temperature min. [ C] acc. to ASME max. [ C] ) Min. standard bellows = Max. low pressure bellows. 95

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 Butt-welded connection S05 O-ring disc J20: FFKM C J21: CR K J22: EPDM D J23: FKM L Stainless steel bellows J68: Bonnet open J78: Bonnet Conversion kit for stainless steel bellows on request High temperature equipment J88 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 100