OVIKO Forged trunnion mounted ball valve is developed by the engineering technical personnel from the factory with more than 30 years experience in design and manufacture of high-pressure valve and international latest technical standard,The valve is mainly used for the long distance pipeline transportation of petrol,natural gas and gas pipeline system in cities.For the special characteristics in use of the valve by long distance pipeline transportation,full consideration is given in the design to capability in bearing pipe stress,safety,weather resistance and reliability in long time used.The design of sealing and structure belong exclusively to the factory..Various kinds of operation are available included manual,worm gear,pneumatic,electricity,pneumatic-hydraulic,electrically-hydyaulic,computer controlled,as well as various special control models.

For the purpose of preventing the stem from flying off resulting in abnormal rising of the inner pressure of valve,shoulder is fixed at the lower part of the stem.In addition,in order to prevent leakage resulting from burnout of packing set of the stem in a fire,thrust bearing is set at the contact position of the shoulder at lower part of the stem and valve body.Thus an inverse seal seat is formed which will prevent leakage and avoid accident.