Trunnion ball
valve is the new generation of high-performance ball
valve,applicable to long-distance pipelines and general industrial
pipelines,it take special consider about it's strength ,safty
and resistant to bad environment when in designing,applicable
to various corrosive and the non-corrosive medium.It compared
with floating ball
valve ,,when working ,Before the valve in the sphere fluid
pressure produced all the forces to bearing,can't make the ball
move toward seat ,so the seat will not bear overlarge pressure
,So the trunnion ball valve have small torque,Seat distortion
small,Sealing performance is stable,Long service life,applicable
to high voltage, large diameter.Advanced spring and seat module,have
tight seal, realize upstream sealing.Each valve has two seats,ach
direction can be sealed,Therefore, install havn't flow direction
limitation,is two-way.This valve is usually horizontal installed.
Five feature of trunnion ball valve
1.Operation save effort:ball support by fluctuation bearing
,reduce the friction,Eliminate the inlet pressure due to push
the spheroid and seal seat sealing load of the torque caused by
excessive.
2.Sealing is reliable:PTFE unisexual sealing materials embedded
in stainless steel seat, The metal valve seat end with spring
ensure sealing enough pre-tightening force, sealing wear when
the valve is in using , the valve to ensure good sealing under
the spring action .
3.Fire structure:To prevent fire or the heat appear,Make PTFE
seals burned,happen large leakage,so help the fire,set the safe
sealing ring between ball and seat ,when the sealing ring burning
,ueder the action of spring ,make the seaing ring push to ball
quickly, forming metal to metal seal,Have certain degree of sealing
effect.refractory testing accord with APl6FA and APl607 standard
.
4.Automatic relief function:When the stagnation medium pressure
in valve lumen anomalies higher than the pre-tightening force
of spring ,Seat back from the ball,achieve automatic relief effect,seat
automatic reset after pressure relife.
.5.Drain pipe:it is all set drainboles up and down of body, It
can check seat whether occurs leakage,when in working ,valve in
full open or full close,relife the lumen pressure,can replace
the packing directly£»can discharge the lumen's stickers,reduce
the medium make pollution to valve.
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