Swagelok LPRS4 Series, User Manual, Page: 9 / 24

9
Assembly Reference Data
Item Component Name Kit Type(s)
Torque
lbf·ft (N·m)
Recommended Lubrication
(included in kit per Table 1)
1 Body plug
C1, C2
37 (50)
Lubricate threads
2 Body plug backup ring B1, B2, C1, C2
3 Body plug O-ring B1, B2, C1, C2
4 Poppet spring C1, C5
5 Poppet backup ring A1, A2
①
, B1, B2, C1
6 Poppet O-ring A1, A2
①
, B1, B2, C1 Lubricate
7 Poppet A1, A2
①
, B1, C1
8 Seat A1, A2
②
, B1, C1
9 Seat O-ring A1, A2
②
, B1, B2, C1
10 Body N/A
11 Diaphragm plate C1, C3
③
12 Diaphragm B1, B2, C1, C3
13 Bottom spring guide C1
14 Piston C1, C3
15 Piston plate O-ring B1, B2, C1, C3
16 Piston plate C1, C3
17 Piston O-ring
B1, B2, C1, C3 Lubricate
18 Piston backup ring B1, B2, C1, C3
19 Piston guide ring B1, B2, C1, C3
20 Set spring C1, C4
21 Spring guide
C1
Lubricate central recess
22 Ball C1 Lubricate
23 Spring housing N/A
24 Washer E1
25 Cap screw E1
RS(H): 20 (27)
Lubricate threads
LPRS: 11 (15)
26 Knob assembly D1 Lubricate threads
27 Anti-tamper set screw D1 Lubricate threads
28 Anti-tamper cover O-ring B1, B2, C1, D1
29 Anti-tamper cover D1 Lubricate threads
30 Blind plug N/A
NPT:
15 (20)
Wrap threads in 2 layers of
PTFE tape. Lubricate tape.
BSP: 26 (35) Lubricate threads
31 BSP blind plug O-Ring B1, B2, C1
32 Self-vent seat A1, A2, B1, B2, C1
33 Self-vent seat O-ring A1, A2, B1, B2, C1
34 Diaphragm screw C1, C3
③
7 (10) Lubricate threads
35 Self-vent plate
C1, C3
36 Spring housing nut E1
37 Diaphragm washer
C1
38 Diaphragm nut
C1
7 (10)
①
RS and LPRS series only
②
RSH series only
③
RS(H) series, self-venting option only
Table 2