... gauge, and pup joint etc. Surface valve-group adopts gooseneck tee with compact structure, little fluid resistance and large power effectuality. ... into separator and burner after flowing through drilling rod or tubing, the assembly is named as control assembly, which can ... downwards.The working pressure includes 35MPa, 70MPa and 105MPa with appropriate test pressure of 70MPa,105MPa and 140MPa.3. ...