Arrow type check valve(drilling tool check valve)is a kind of important inside blowout tool,usually used in the oil and gas drilling and workover operation.It works with drilling tools enter into the well,during the process of drilling and workover in case of overflow, well kick,or positive circulation stops,the arrow type check valve will shut down rapidly under the action of reverse circulation pressure inside drill tools and spring force,cut off the inner channel of drilling tools,to prevent blowout purpose in the drilling tools.
| Model | OD | ID | Connection | Working Pressure |
| mm (inch) | mm(inch) | API | MPa(PSI) | |
| FJ78 | 78(3-1/16) | 25.4(1) | 2-3/8EUE | 35 (5,000) |
| FJ79 | 79 (3-1/8) | 25.4(1) | 2-7/8 HT PAC | |
| FJ86 | 86(3-3/8) | 25.4(1) | NC26 | |
| FJ93 | 93(3-43/64) | 25.4(1) | 2-7/8EUE | |
| FJ105 | 104.8(4-1/8) | 41.3(1-5/8) | NC31 |
35～70 (5,000～10,000) |
| FJ111 | 111 (4-3/8) | 41.3(1-5/8) | NC31 | |
| FJ114 | 114(4-1/2) | 41.3(1-5/8) | 3-1/2EUE | |
| FJ121 | 121(4-3/4) | 54 (2-1/8) | NC38 | |
| FJ124 | 124(4-7/8) | 50.8(2) | HT38 | |
| FJ127 | 127(5) | 54(2-1/8) | NC38 | |
| FJ141 | 141(5-9/16) | 54 (2-1/8) | 4-1/2EUE | |
| FJ159 | 159 (6-1/4) | 70(2-3/4) | NC46 | |
| FJ165 | 165(6-1/2) | 70(2-3/4) | NC50 | |
| FJ168 | 168(65/8) | 70(2-3/4) | NC50 | |
| FJ178 | 178(7) | 70(2-3/4) | 5-1/2FH | |
| FJ184 | 184(7-1/4) | 71.4(2-13/16) | XT54 | |
| FJ203 | 203(8) | 71.4(2-13/16 | 6-5/8REG | |
| FJ209 | 209 (8-1/4) | 70(2-3/4) | 6-5/8REG | |
| FJ229 | 229(9) | 76.2(3) | 7-5/8REG |
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