China Factory Free sample Taper Mill - Throw-Type Back Pressure Valve Type HY – Gaofeng Manufacturer and Supplier

Factory Free sample Taper Mill - Throw-Type Back Pressure Valve Type HY – Gaofeng

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Throw-Type Back Pressure Valve Type HY Model “HY” Throw-Type Back Pressure Valve is an internal preventer. When blowout is going to happen, the Kelly rod should be removed immediately and the back pressure valve assembly should be put into the I.D. and then pumped downward to the required place. Thus, the blowout can be prevented. Specifications Product Code O.D mm（in） Connection Pressure grade （Mpa） NFQ105 105(4 1/8) NC31 70、105 NFQ127 127(5) NC38 70、105 NFQ159 159(...

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Factory Free sample Taper Mill - Throw-Type Back Pressure Valve Type HY – Gaofeng Detail:

Throw-Type Back Pressure Valve Type HY

Model “HY” Throw-Type Back Pressure Valve is an internal preventer. When blowout is going to happen, the Kelly rod should be removed immediately and the back pressure valve assembly should be put into the I.D. and then pumped downward to the required place. Thus, the blowout can be prevented.

Specifications

Product Code	O.D mm（in）	Connection	Pressure grade （Mpa）
NFQ105	105(4 1/8)	NC31	70、105
NFQ127	127(5)	NC38	70、105
NFQ159	159(6 1/4)	NC46	70、105
NFQ168	168(6 5/8)	NC50	70、105
NFQ178	178(7)	5 1/2FH	70、105
NFQ184	184(7 1/4)	5 1/2FH	70、105

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