Instruction Manual
3
REF. NO. PART NAME MATERIAL
1 Body ASTM A126-B (Grey Iron)
2 Bonnet ASTM A126-B (Grey Iron)
3 Nozzle ASTM B26 (Bronze)
4 Nozzle Ring ASTM B584-844 (Bronze)
5 Disc ASTM B62 (Bronze)
6 Guide Ring ASTM B584-844 (Bronze)
7 Adjusting Bolt ASTM B16 (Brass)
8 Adjusting Bolt Locknut Steel (Zn Plate)
9 Nozzle Ring Set Screw Brass
10 Guide Ring Set Screw Brass
11 Spindle ASTM A108 Grade 1212
12 Spindle Nut ASTM A108 Grade 1212
13 Spindle Nut Lock nut Steel AISI (Zn Plate)
14 Lifting Cap A126-B Cast Iron
15 Lifting Cap Pins Steel 1020 (Zn Plate)
16 Pivot Post Steel AISI
17 Post Pin Steel AISI 1070 (Zn Plate)
18 Spring Washer Steel AISI 1212
19 Spring Steel (Zn Plate)
20 Stud Steel ASTM A193 B7
21 Stud Nut Steel ASTM A194 2H
22 Name Plate SST AISI 304
23 Name Plate Screws SST 18-8
24 Lead Seal Lead Commercial
25 Seal Wire SST AISI 304
26 Lifting Lever A126-B Cast Iron
27 Clevis Pin Steel (Zn)
28 Cotter Pin Steel
29 Liftcap Lockscrew Steel
Dimensions — Weights
Watts Cast Iron Safety Relief Valves
Figure 41A
Materials
VALVE SIZE ORIFICE SIZE DIMENSIONS WEIGHT
Inlet & Outlet (in.) A B C D E
in. mm in. mm in. mm in. mm in. mm in. mm lbs. kgs.
1
1
⁄2-250# x 2
1
⁄2 NPT 40 x 65 J 15 381 3
1
⁄4 83 4
1
⁄4 108 3 76 – – 24 11
1
1
⁄2 NPT x 2
1
⁄2 NPT 40 x 65 J 14
1
⁄2 368 3
1
⁄4 83 4
1
⁄4 108 3 76 2
3
⁄4 70 20 9
2-250# x 3 NPT 50 x 80 J,K 15
3
⁄4 400 4 102 4
5
⁄8 117 3
1
⁄2 89 – – 42 19
2 NPT x 3 NPT 50 x 80 K 15
3
⁄4 400 4 102 4
5
⁄8 117 3
1
⁄2 89 3
5
⁄8 92 36 16
2
1
⁄2-250# x 3 NPT 65 x 80 K 15
3
⁄4 400 4 102 4
3
⁄4 121 3
1
⁄2 89 – – 45 20
2
1
⁄2-250# x 4 NPT 65 x 100 L 23 584 5
1
⁄8 130 5
1
⁄2 140 6 152 – – 105 48
2
1
⁄2 NPT x 4 NPT 65 x 100 L 23 584 5
1
⁄8 130 5
1
⁄2 140 6 152 4
1
⁄2 114 97 44
3-250# x 3 NPT 80 x 80 K 15
3
⁄4 400 4 102 5 127 3
1
⁄2 89 – – 48 22
3-250# x 4 NPT 80 x 100 L,M 23 584 5
1
⁄8 130 5
1
⁄2 140 6 152 – – 107 49
3-NPT# x 4 NPT 80 x 100 M 23
1
⁄8 587 5
1
⁄8 130 5
5
⁄8 143 6 152 4
1
⁄2 114 99 45
4-250# x 6-125# 100 x 150 N,P 28
1
⁄2 724 7
1
⁄4 184 6
3
⁄4 171 6 152 – – 212 96
6-250# x 8-125# 150 x 200 Q,R 45
5
⁄16 1151 10 254 9
1
⁄4 235 10
1
⁄2 267 – – 675 306