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.

Locks can be used to lock the manual valve when it is fully open or closed so as to prevent non-working 

personnel from pulling the handle which may result in misoperation of valve.It can also avoid opening or 

closing of valve resulting from the shock from pipelines or unpredictable factors that may cause an accident.

For working pipelines such as combustible and explosive oil,gas and chemical medium,or for field piping site,

the locking mechanism is especially useful.

When the trunnion ball valve be used normally,its sealed by seat and ball surface,seat retainer sealed by 

O-ring and body,this is soft sealed and reliable sealing.When the seat and O-ring are burnt,the seat retainer 

and body will be sealed by expanded graphite.Thus act anti-fire safe purpose.

In order to prevent friction among ball,stem and PTFE that generates static electricity which may light the 

combustibles and explosives that cause an accident,in this ball valve,static-conduction spring is set between 

the stem and the ball,the stem and the body.Thus static electricity is conducted to ground and system safety 

is secured.

The self-lubricated bearings are installed at the friction of stem,resulting in wear resistance,fiexibility of 

operation and low torque.

When the body pressure going up un-normally as the unstable factor,the trunnion ball valve downstream 

seat will be pushed by un-normally pressure,and the release the unnormal pressure automatically,it doesn't 

damage to the sealing of upstream seat.The un-normally pressure which in the floating ball valve body will 

release the pressure into the upstream pipe directly,it doesn't damage to the sealing of the downstream seat.

The top pad of valve designed according to ISO 5211,which is convenient for connection and exchange of 

various drivers.The common driving types are manual,electrical,pneumatic and pneumatic/hydraulic.

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the following enquiry form. Our sales representative will contact you within 24 hours. Thank you for your interest in our products.