Replacement Parts List

28
MODEL 950
Double Check
Backow Preventers 2-1/2” to 10”
a company
®
ITEM
NO.
DESCRIPTION 2-1/2” 3” 4” 6” 8” 10”
1 GATE VALVE, NRS 212-48 3-48 4-48 6-48 8-48 10-48
GATE VALVE, OS&Y 212-48OSY 3-48OSY 4-48OSY 6-48OSY 8-48OSY 10-48OSY
2 BOLT, FLANGE 558-11D 558-11D 559-11 5510-11 9511-11B 9512-11B
3 NUT, FLANGE 558-9 558-9 558-9 5510-9 5510-9 9512-9A
4 GASKET, FLANGE 557-13 558-13 559-13 5510-13 9511-13 9512-13
5 STUD, FLANGE 959-11A 959-11A 959-11A 9511-11A 9511-11A N/A
6 O-RING, SMALL 022N 022N 022N 022N 022N 022N
7 O-RING, LARGE 033N 033N 033N 033N 036N 036N
8 COVER PLATE 957-3A-010F 957-3A-010F 957-3A-010F 957-3A-010F 9511-3A-010F 9511-3A-010F
9 BOLT, COVER PLATE 554-11A 554-11A 554-11A 554-11A 554-11A 554-11A
10 COVER 957-3C 957-3C 959-3C 9510-3C 9511-3C 9512-3C
11 O-RING, COVER 248N 248N 264N 374N 452N 457N
12 BOLT, COVER 957-11 957-11 959-11 9510-11 9511-11 9512-11
13 NIPPLE, SHORT N/A N/A N/A 102-21B 102-21B 102-21B
14 BALL VALVE, MALE 12-850M 12-850M 12-850M N/A N/A N/A
BALL VALVE, FEMALE 12-850 12-850 12-850 34-850XL 34-850XL 34-850XL
15 O-RING, SEAT 238N 238N 252N 366N 374N 379N
16 SEAT 957-18-010F 957-18-010F 959-18-010F 9510-18-010F 9511-18-010F 9512-18-010F
17 BOLT, SEAT 5752-11 5752-11 959-11B 959-11B 959-11B 959-11B
18 LOWER STEM GUIDE N/A N/A 959-2 957-2 9511-2 9512-2
19 NUT, STEM 957-9 957-9 959-9 9511-9 9511-9 9512-9
20 RETAINING PLATE 957-31-010F 957-31-010F 959-14-010F 9510-14-010F 9511-14-010F 9512-14-010F
21 SEAL RING 558-12 558-12 959-12 9510-12 9511-12 9512-12
22 POPPET ASSEMBLY 957-300 957-300 959-300 9510-300 9511-300 9512-300
23 UPPER STEM GUIDE 957-2 957-2 957-2 9510-2 9511-2A 9512-2A
24 NIPPLE, LONG 558-21B 558-21B 558-21B 5510-21B 5510-21B 5510-21B
25 PLUG 558-7 558-7 558-7 5510-7 5510-7 5510-7
26 LIFTING LUG N/A N/A N/A 9510-24 9510-24 N/A
RK4-950
REPAIR KIT
MODELS 950/975, 4”
RK8-950
REPAIR KIT
MODELS 950/975, 8”
PART NO. QTY. DESCRIPTION PART NO. QTY. DESCRIPTION
959-12 2 SEAL RING 9511-12 2 SEAL RING
264N 2 O-RING, COVER 452N 2 O-RING, COVER
REPAIR KITS
RK212-950
REPAIR KIT
MODELS 950/975
2-1/2” & 3”
RK6-950
REPAIR KIT
MODELS 950/975, 6”
RK10-950
REPAIR KIT
MODELS 950/975, 10”
PART NO. QTY. DESCRIPTION PART NO. QTY. DESCRIPTION PART NO. QTY. DESCRIPTION
558-12 2 SEAL RING 9510-12 2 SEAL RING 9512-12 2 SEAL RING
248N 2 O-RING, COVER 374N 2 O-RING, COVER 457N 2 O-RING, COVER