1．strictly according to API 6A, NACE MR-0175 standard.
2．compact structure and reliable operation.
3．offer 35 MPa, 70MPa, 105MPa different pressure products
4．can offer all metal seal from Tubing Hanger to Christmas
Tree.
5．flange connection
6．with Valve remove-reinstall "VR" screw thread, which can
change the outlet valve simply and fast under pressure
7．with series of tubing hangers which can meet any well
requirement.
8．offer Counter Balance Valve with Running-in/off-take
Tool.