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3 1/2" Nc 38 REG Arrow Type Check Valve Back pressure Valve
NC 38 Arrow type check valve
3 1/2" Nc 38 REG Arrow Type Check Valve Back pressure Valve
Arrow type check valve
Arrow type check valve description:
Arrow type check valve (drill check valve) is a kind of important inside blowout tool, usually used in the oil and
gas drilling and workover. It works with the drilling tool into the well,in the process of drilling and workover in
case of overflow, kick, or positive cycle to stop, the arrow type check valve will shut down rapidly under the
action of reverse circulation pressure inside drill tools and spring force, cutting the channel within drilling tools,
thus play a blowout purpose within drill tools.
1/2" Nc 38 REG Arrow Type Check Valve Back pressure Valve NC 38 Arrow type check valve
Arrow type check valve specifications:
| Type | O. D. (mm) | Connection | I. D. (mm) | Working Pressure(MPa) |
| FJ229 | 229 | 7 5/8 REG | 82 | 70(35) |
| FJ203 | 203 | 6 5/8 REG | 82 | 70(35) |
| FJ178 | 178 | 5 1/2 FH | 82 | 70(35) |
| FJ168 | 168 | NC50 | 82 | 70(35) |
| FJ165 | 165 | NC50 | 82 | 70(35) |
| FJ159 | 159 | NC46 | 70 | 70(35) |
| FJ121 | 121 | NC38 | 56 | 70(35) |
| FJ105 | 105 | NC31 | 44 | 70(35) |
| FJ89 | 89 | NC26 | 33 | 70(35) |
3 1/2" Nc 38 REG Arrow Type Check Valve Back pressure Valve
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