851A
851A
Specifications:
- Sizes –2", 2-1/2", 3", 4", 6", 8", 10", 12", 14", 16", 18", 20", 24"
- Ductile iron body and cover
- Epoxy coated interior & exterior for corrosion resistance
- Certified to ANSI/NSF 61
- Stainless steel bolts
- Buna encapsulated steel flexible disc with nylon fabric reinforcement
- Vertical or horizontal (flow upwards) installation
- 250 psig (1725 kPa/17 barg) maximum working pressure, 500 psig (3450 kPa/35 barg) test pressure
- Optional EPDM disc
Valve Size* | A | B | C | D |
2" | 8.00 | 2.00 | 3.38 | 8.38 |
2-1/2" | 8.50 | 2.50 | 3.38 | 8.38 |
3" | 9.50 | 3.00 | 3.88 | 9.00 |
4" | 11.50 | 4.00 | 4.63 | 9.63 |
5" | 13.75 | 5.00 | 5.13 | 10.25 |
6" | 15.00 | 6.00 | 5.88 | 11.00 |
8" | 19.50 | 8.00 | 7.63 | 13.75 |
10" | 24.50 | 10.00 | 9.88 | 16.00 |
12" | 27.50 | 12.00 | 11.38 | 18.50 |
14" | 31.00 | 14.00 | 13.38 | 20.50 |
16" | 32.00 | 16.00 | 15.38 | 23.50 |
18" | 36.00 | 18.00 | 17.13 | 25.25 |
20" | 40.00 | 20.00 | 19.13 | 29.25 |
24" | 18.00 | 24.00 | 22.75 | 32.75 |
**All dimensions are in inches. All weights are in pounds and are approximate.
▼ Material strength ASTM A536 65-45 minimum
Valve Size* | Weight** |
2" | 22 |
2-1/2" | 30 |
3" | 40 |
4" | 71 |
5" | 120 |
6" | 125 |
8" | 222 |
10" | 372 |
12" | 514 |
14" | 696 |
16" | 987 |
18" | 1,340 |
20" | 1,670 |
24" | 2,147 |
Part Number | Description | Material | Material Standard |
1 | Body | Ductile Iron | ASTM A536 ▼ |
2 | Bonnet | Ductile Iron | ASTM A536 ▼ |
3 | Gasket | Rubber | ASTM D2000 BK 807 |
4 | Disc | Steel/Buna or EPDM | ASTM A36/D2000 |
5 | Bonnet Bolts | Steel | SAE Grade 5 |
6 | Interior Lining | Epoxy | - |
7 | Plug | Ductile Iron | ASTM A536 ▼ |