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类型
外径(mm)
螺纹类型
内径(mm)
最大密封压力
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
 TIANHE Arrow Type Back Pressure valve is an important tool preventing of blowout.The design of the Arrow Type Back Pressure valve  allows for an on-site determination of back pressure to be set at surface.It has the advantages of high strength, large overflow area, high temperature resistance, high pressure resistance, corrosion resistance of drilling fluid and convenient maintenance etc.
一、Arrow type back pressure valve
?Diameter of the Arrow type back pressure valve
?thread connection of Arrow type back pressure valve
?Working pressure of Arrow type back pressure valve
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Tianhe Oil Group Huifeng Petroleum Equipment CO. ltd.