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1 Type Flanged Safety Relief Valves spring loaded Metric Units Facts The-Safety-Valve.com LWN E

2 Conventional design 40 Bolted Cap H1 18 Adjusting screw 19 Lock nut 69 Needle bearing 16 Upper spring plate 9 Bonnet 12 Spindle 54 Spring 14 Split ring 17 Lower spring plate 55 Stud 56 Nut 60 Gasket 8 Guide with bushing 22 Lift stopper 21 Lift stopper 57 Pin 61 Ball 7 Disc 5 Seat 1 Body 88 Spacer 87 Plug 52

3 Conventional design Materials Please notice: - Modifications reserved by LESER. If several materials are specified LESER defines the material. - LESER can upgrade materials without notice. - Every part can be replaced by other material acc. to customer specification. Bolted cap H1 only available for DN 200 and DN 250. Item Component Type 4412 / 4422 Type Body 5 Seat 7 Disc 8 9 DN : Guide with bushing DN : Guide Bonnet casted Bonnet welded 12 Spindle 14 Split ring 16/17 Spring plate 18 Adjusting screw with bushing 19 Lock nut 21/22 Lift stopper 40 Bolted cap H1 Ductil Gr , DN DN 250: , Flange Flange SA Spring standard Spring optional 55 Stud 56 Nut 57 Pin 60 Gasket 61 Ball 69 Needle bearing 87/88 Plug / Spacer Inlet: Outlet: / Inlet: 316Ti Outlet: Carbon steel 316Ti stellited, stellited Carbon steel, stellited 316Ti Ductile Gr / Chrome steel Ductile Gr DN 200 / DN 250: () / (316Ti) / (Steel) DN 300 / DN 400: / (316Ti) / (Steel) The welded construction may consist of additional materials / Ti / Chrome steel or Steel or PTFE PTFE Chrome steel PTFE PTFE DN DN 400: CF8M , , Carbon steel Stainless steel Stainless steel B8M B8M 8M 8M Stainless steel Stainless steel Graphit e/ Graphite / Graphite / 316 Graphite / Hardened stainless steel / / / 316Ti 316 / 316Ti 53

4 Balanced bellows design 40 Bolted Cap H1 18 Adjusting screw 19 Lock nut 69 Needle bearing 16 Upper spring plate 9 Bonnet 12 Spindle 54 Spring 14 Split ring 17 Lower spring plate 55 Stud 56 Nut 60 Gasket 8 Guide with bushing 15 Bellows 22 Lift stopper 57 Pin 61 Ball 7 Disc 5 Seat 1 Body 88 Spacer 87 Plug 54

5 Balanced bellows design Materials Please notice: - Modifications reserved by LESER. If several materials are specified LESER defines the material. - LESER can upgrade materials without notice. - Every part can be replaced by other material acc. to customer specification. Bolted cap H1 only available for DN 200 and DN 250. Item Component Type 4412 / 4422 Type Body 5 Seat DN DN Disc 8 Guide 9 Bonnet casted Bonnet welded 12 Spindle 14 Split ring 15 Bellows 16/17 Spring plate 18 Adjusting screw with bushing 19 Lock nut 22 Lift stopper 40 Bolted cap H1 Ductil Gr , DN DN 250: , Flange Flange SA Spring standard Spring optional 55 Stud 56 Nut 57 Pin 60 Gasket 61 Ball 69 Needle bearing 87/88 Plug / Spacer Inlet: Outlet: / Inlet: 316Ti Outlet: Carbon steel 316Ti stellited Carbon steel, stellited 316Ti stellited Carbon steel, stellited 316Ti Ti 316Ti Ductile Gr DN 200 / DN 250: / () / (316Ti) / (Steel) DN 300 / DN 400: / (316Ti) / (Steel) 316Ti / The welded construction may consist of additional materials Chrome steel Ti 316Ti or Steel or PTFE PTFE Chrome steel PTFE PTFE DN DN 400: CF8M , , Carbon steel Stainless steel Stainless steel B8M B8M 8M 8M Stainless steel Stainless steel Graphite / Graphite / Graphite / 316 Graphite / Hardened stainless steel / / / 316Ti 316 / 316Ti 55

6 Article numbers DN I+O 200 x x x x 500 Valve size 8" x 12" 10" x 14" 12" x 16" 16" x 20" Actual Orifice diameter d 0 [mm] Actual Orifice area A 0 [mm 2 ] Body material: / (Carbon steel) Bonnet H1 Art. No closed H3 Art. No H6 Art. No open H6 Art. No Body material: (316Ti) Bonnet H1 Art. No closed H6 Art. No Bolted cap H1 and bolted lifting device H6 only available for DN 200 and DN 250. DN 300 and DN 400 available with cap H2 and lifting device H4. Type 441 Bolted cap H1 Closed bonnet Conventional and balanced bellows design Type 441 Bolted lifting device H6 Closed bonnet Conventional and balanced bellows design Type 441 Bolted lifting device H6 Open bonnet Conventional and balanced bellows design 56

7 Dimensions and weights Metric Units DN I+O 200 x x x x 500 Valve size 8" x 12" 10" x14" 12" x 16" 16" x 20" Actual Orifice diameter d 0 [mm] Actual Orifice area A 0 [mm 2 ] Weight [kg] with bellows Center to face Inlet a [mm] Outlet b Height (H6) Standard H max [mm] Bellows H max Support brackets A [mm] B (drilled only on request, C Ø 18 Ø 18 Ø 24 Ø 28 Option code H42) D E Body material: / (Carbon steel) DIN Flange 2) Inlet PN 25 PN 16 Body material: (316Ti) Outlet PN 10 DIN Flange 2) Inlet PN 25 PN 16 Outlet PN 10 For pressure rating outlet higher than PN 10 centre to face dimension will change 2) Standard flange rating. For other flange drillings and facings please refer to page 61. E C B D A Conventional and balanced bellows design Support brackets 57

8 Pressure temperature ratings Metric Units DN I+O 200 x x x x 500 Valve size 8" x 12" 10" x 14" 12" x 16" 16" x 20" Actual Orifice diameter d 0 [mm] Actual Orifice area A 0 [mm 2 ] Body material: / (Carbon steel) DIN Flange Inlet PN 25 PN 16 Outlet PN 10 Minimum set pressure ] S/G/L Min. set pressure ] S/G/L standard bellows Min. set pressure low press. bellows Maximum set pressure Max. set pressure with special spring ] S/G/L ] S/G/L ] S/G/L Temperature min. [ C] -85 acc. to DIN EN max. [ C] +420 Temperature min. [ C] -29 acc. to ASME max. [ C] +427 Body material: (316Ti) DIN Flange Inlet PN 25 PN 16 Outlet PN 10 Minimum set pressure ] S/G/L Min. set pressure ] S/G/L standard bellows Min. set pressure low press. bellows Maximum set pressure Max. set pressure with special spring ] S/G/L ] S/G/L ] S/G/L Temperature min. [ C] -196 acc. to DIN EN max. [ C] +550 Temperature min. [ C] -184 acc. to ASME max. [ C] +427 Min. set pressure standard bellows = Max. set pressure low pressure bellows. 59

9 Available options Drain hole J19: G 1 / 2 Open bonnet See article number Disc stellited J25 Stainless steel bellows J68: Open bonnet J78: Closed bonnet Bolted cap H1 H1 Bolted lifting device H6 H6 Test gag J69: Bolted lifting device H6 J70: Bolted cap H1 Lift indicator J39: Adaptor for lift indicator H6 J93: Lift indicator 63

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