25 Relief Spring Seat (For Type 627R or
627MR only), Steel 10B7446X012
26 Guide Retainer (For Type 627R, 627LR or
627MR only), Stainless steel 10B7450X012
27 Relief Spring (For Type 627R or 627MR only),
Plated steel 10B6757X012
For Type 627LR 1B541327022
28* Relief Seal O-ring
Nitrile (NBR)
For Type 627R, 627LR or 627MR only 1J108506992
Fluorocarbon (FKM)
For Types 627R, 627LR and 627MR only 1J1085X0042
29 Spring Case
For Type 627, 627R or 627LR
Aluminum 40B3086X012
Ductile iron 30B3055X012
Steel 30B3102X012
Stainless steel (Types 627 and 627R only) 30B3102X092
29 Spring Case (continued)
For Type 627M or 627MR
Ductile iron 30B3055X012
Steel 30B3102X012
For Type 627H or 627HM
Steel 30B3102X012
Stainless steel (Type 627H only) 30B3102X092
30 Screened Vent Assembly, Plastic 10B3093X012
31 Lower Spring Seat, Plated steel
For Type 627 or 627M 1D666625072
For Type 627R, 627LR or 627MR 20B3073X012
32 Control Spring, Plated steel
5 to 20 psig / 0.34 to 1.4 bar, Yellow 10B3076X012
15 to 40 psig / 1.0 to 2.8 bar, Green 10B3077X012
35 to 80 psig / 2.4 to 5.5 bar, Blue 10B3078X012
70 to 150 psig / 4.8 to 10.3 bar, Red 10B3079X012
140 to 250 psig range / 9.7 to 17.2 bar, Blue,
used for Type 627H or 627HM 10B3078X012
240 to 500 psig range / 16.5 to 34.5 bar, Red,
used for Type 627H or 627HM 10B3079X012
33 Upper Spring Seat, Plated steel 1D667125072
34 Locknut, Plated steel 1D667728982
35 Adjusting Screw, Plated steel
For Type 627, 627M, 627H or 627HM 10B3081X012
For Type 627R, 627LR or 627MR 10B3080X012
36 Adjusting Screw Cap, Plastic 20B3082X012
37 Spring Case Cap Screw, Plated steel
(8 required)
For Aluminum or ductile iron diaphragm case 1A391724052
For Steel diaphragm case 1A368324052
For Stainless steel case and body 1A3683X0062
For Aluminum case and SST body 1A3917X0062
For Type 627H/HM, steel diaphragm case 1A346424052
For Type 627H, Stainless steel case and body 1A3464X0022
43 Blocked Throat (For Type 627M, 627HM or
627MR only), Stainless steel 10B3085X012
44* Blocked Throat O-ring
Nitrile (NBR) For Type 627M, 627HM or
627MR only (2 required) 1E264306992
Fluorocarbon (FKM)
For Types 627M and 627MR only 1E2643X0022
45* Blocked Throat Back-up Ring (For Type 627M,
627HM or 627MR only), PTFE (2 required) 10B3106X012
46 Diaphragm Head Cap Screw, Steel
For Type 627 or 627M 1B290524052
For Type 627H or 627HM 1C379124052
47 Relief Seal Retainer (For Type 627R, 627LR or
627MR only), Stainless steel 10B7445X012
48* Guide Retainer O-ring
Nitrile (NBR)
For Type 627R, 627LR or 627MR only 1D682506992
Fluorocarbon (FKM)
For Types 627R, 627LR and 627MR only 1N423906382
49 Relief Indicator (For Type 627R, 627LR or
627MR only), Rubber (not shown) 30B3100X012
50 Diaphragm Limiter
(For Types 627H and 627HM only) 22B0176X012
51* Diaphragm Limiter O-ring
For Types 627H and 627HM only 1K877606992
52* Pusher Post O-ring (2 required)
For Types 627H and 627HM only 1C853806992
58 Pipe Plug, Zinc 1D8293T0022
67 Drive Screw, 18-8 Stainless steel 1A368228982
72 Pipe Plug, Zinc-plated steel 1A767524662
75* Slam-shut seat ERAA32884A0
76* O-ring GE29958X012
Key Description Part Number Key Description Part Number
*Recommended spare part.
16
627 Series
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