Features: 
 1, advanced seat: poly many years of experience in manufacturing ball valve seat designed to ensure that the valve seal, low friction coefficient, the operating torque, a variety of seat materials, wide. 
 2, the switch correctly handle: using flat head stem, and handle the connection is not misplaced, in order to ensure the handle indication of switch state and the valve of a speech. 
 3, the locking device: To prevent misuse valve switch, the valve is fully open, fully closed position with a lock hole, make sure the valve is in the right place. 
 4, anti-fly structure of stem: the stem as the download type, to prevent pressure on flying, while after the fire, and the body to form the metal contact, to ensure that stem seal. 
 Medium: 
 Water, gas, oil, gas and acid-base corrosive media. 
 Temperature: 
 -196 ~ 350 ℃ 
 Drive: 
 Manual, pneumatic, electric, hydraulic, and so on.