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Wednesday, 19 June 2013 Cast trunnion ball valve
Cast trunnion ball valve
1.Blow-out proof stem
For the purpose of preventing the trunnion ball valve stem from flying off resulting in abnormal rising of the inner pressure of valve,shoulder is fixed at the lower part of replica a lange & sohne watches the stem.In addition,in order to prevent leakage resulting from burnout of packing set of the stem in a fire,thrust air jordan bearing is set at the contact men shirts position of the shoulder at lower part of the stem and valve body.Thus an inverse seal seat is formed din check valve which will prevent leakage and avoid accident.
Locks can be used to lock the manual 304 stainless steel plate valve when it is fully open or mbt sale closed so as to prevent non-working personnel from pulling the handle purses wholesale which may result in misoperation vibram kso of valve.It can also avoid opening or closing of valve resulting from the shock from discount moncler jackets pipelines or ralph lauren polo shirts unpredictable factors that may cause an accident.For working pipelines such wholesale software as combustible and explosive oil,gas and moncler down jackets chemical medium,or for field piping site,the locking mechanism is especially useful.
3.Anti-fire safe design
When the trunnion ball valve be used normally,its adobe acrobat 9 sealed by seat and diesel clothing ball surface,seat retainer sealed by O-ring and body,this is soft sealed and reliable sealing.When jimmy choo sale the seat and O-ring are burnt,the seat nike air max retainer and body will be sealed by expanded graphite.Thus wholesale bags from china act anti-fire safe purpose.
In order to prevent friction among ball,stem coach handbags 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 nike shox r4 the stem and the ball,the stem and the body.Thus static electricity is conducted to ground and system safety is secured. 5.Free leakage of body Sealed construction
The connective position of valve body shoes nike basketball and bonnet is double sealed by men shirts gasket and O-ring,on this base,such factors as fire,high temperature,shock and leather handbags uneven opening or closing of the torque all cant induce external leakage.
6. Double block& bleed(DBB)
When ball is full open or close position,the transmitter cheap jordan shoes substance in center cavity of body can be released by drainage and emptying devices.In addition,the over loaded pressure in the center cavity of valve can be cheap international calls released to low pressure end by self relief seat.
Compound injection holes are designed and compound plastic bag injection valves are installed sex toys at locations of stem/cap and body support of side valve.When sealing of stem or seat is damaged to induce leakage,the compound can be used to do the second time sealing.A concealed check valve is installed in side of each compound injection valve to prevent compound from out flowing due to the action of biological microscope transmitter substance.The top of the compound injection valve is the connector for fast connection with compound injection jordan high heel shoes gun.
8.Automatic body cavity relief
When the body pressure going up un-normally as the cast steel unstable rubber grommet factor,the trunnion ball valve downstream seat will be seamless steel pipe pushed by unnormal pressure,and the release the un-normally pressure automatically,it doesn't damage to the sealing of upstream seat.
9.Various driving types
The top pad of valve designed according chain saw 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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