The FJarrow back pressure valve is an important tool in preventing of blowing out in drilling operation. Comparing to other structural valves, it posses some advantage such as high strength , big flow area, high temperature resistant, high pressure resistant, fluid flush resistant and easily maintemance。
Technical parameters and specifications
| Type |
O.D.(mm) |
Thread connection
(API) |
I.D.(mm) |
Max.Sealing Pressure
Mpa |
| FJ178(190) |
178(190) |
5 1/2FH |
Φ70 |
70; 35 |
| FJ165(168) |
165(168) |
NC50(4 1/2IF) |
Φ70 |
70; 35 |
| FJ159 |
159 |
NC50(4 IF) |
Φ70 |
70; 35 |
| FJ121(127) |
121(127) |
NC38(3 1/2IF) |
Φ50 |
70; 35 |
| FJ105 |
105 |
NC31(2 7/8IF) |
Φ40 |
70; 35 |
| FJ89 |
89 |
NC26(2 3/8IF) |
Φ35 |
35 | |
