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About Backflow-Prevention Valves
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Pipeline Fluid Blockers
Also known as paddle blinds, these fit between two flanges to temporarily block the flow while you work downstream.
304 stainless steel blinds are more corrosion resistant than steel blinds.
Steel
- Specifications Met: ASTM A36
Handle | ||||||||
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| For Pipe Size | OD | Max. Pressure | Thick. | Lg. | Wd. | Temp. Range, °F | Each | |
| 1 | 2 1/2" | 150 psi @ 70° F | 1/4" | 7" | 1" | -20° to 100° | 0000000 | 000000 |
| 1 1/2 | 3 1/4" | 150 psi @ 70° F | 1/4" | 7" | 1" | -20° to 100° | 0000000 | 00000 |
| 2 | 4" | 150 psi @ 70° F | 1/4" | 7" | 1" | -20° to 100° | 0000000 | 00000 |
| 2 1/2 | 4 3/4" | 150 psi @ 70° F | 1/4" | 7" | 1" | -20° to 100° | 0000000 | 00000 |
| 3 | 5 1/4" | 150 psi @ 70° F | 1/4" | 7" | 1" | -20° to 100° | 0000000 | 00000 |
| 4 | 6 3/4" | 150 psi @ 70° F | 1/4" | 7" | 1" | -20° to 100° | 0000000 | 00000 |
| 6 | 8 5/8" | 150 psi @ 70° F | 1/2" | 7" | 1" | -20° to 100° | 0000000 | 00000 |
| 8 | 10 7/8" | 150 psi @ 70° F | 5/8" | 7" | 1" | -20° to 100° | 0000000 | 000000 |
| 10 | 13 1/4" | 150 psi @ 70° F | 5/8" | 7" | 1 1/2" | -20° to 100° | 0000000 | 000000 |
| 12 | 16" | 150 psi @ 70° F | 5/8" | 7" | 1 1/2" | -20° to 100° | 0000000 | 000000 |
PTFE-Coated 304 Stainless Steel
- Specifications Met: ASTM D4894, FDA Compliant 21 CFR 177.1550
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| For Pipe Size | OD | For Orifice Flange ANSI Class | Max. Pressure | Thick. | Lg. | Wd. | Temp. Range, °F | Each | |
| 1/2 | 1 7/8" | 150 | 150 psi @ 250° F | 1/8" | 2" | 3/4" | -100° to 400° | 0000000 | 000000 |
| 3/4 | 2 1/4" | 150 | 150 psi @ 250° F | 1/8" | 2" | 3/4" | -100° to 400° | 0000000 | 00000 |
| 1 | 2 5/8" | 150 | 150 psi @ 70° F | 1/8" | 2 3/4" | 3/4" | -100° to 400° | 0000000 | 00000 |
| 1 1/2 | 3 3/8" | 150 | 150 psi @ 70° F | 1/8" | 2 3/4" | 3/4" | -100° to 400° | 0000000 | 00000 |
| 2 | 4 1/8" | 150 | 150 psi @ 70° F | 1/8" | 3" | 3/4" | -100° to 400° | 0000000 | 00000 |
| 3 | 5 3/8" | 150 | 150 psi @ 70° F | 1/8" | 3" | 3/4" | -100° to 400° | 0000000 | 00000 |
| 4 | 6 7/8" | 150 | 150 psi @ 70° F | 1/8" | 3" | 3/4" | -100° to 400° | 0000000 | 00000 |
| 6 | 8 3/4" | 150 | 150 psi @ 70° F | 3/16" | 5" | 3/4" | -100° to 400° | 0000000 | 000000 |