Application
Trunnion ball valves are suitable for use on various kinds of pipelines of Class150~Class2500,PN16~PN160,JIN 10K~ JIN 20K to cut off or turn on the pipeline medium,of which the operation types include worm gear,manual,pneumatic or electric actuators,being in general of flange connection,and butt welding ends connection as well.
1.Urgent grease injection device
According to customer'requirement,the trunnion ball valves made by lianggong company are provided with devices for urgent grease injection,which are on both the stem and seat for the trunnion Ball valves of DN>150mm(NPS6),and in the body cavity for the valve of DN<125mm.When the O ring of stem or the body seat ring is damage due to accident,the medium leakage between body and stem can be prevented by injecting the sealing grease though the device
2.Double-block and bleed functions
In general,lianggong turnnion ball valve features the front ball sealing design structure. Each seat of the ball valve can separately cut off the medium at both inlet and outlet of the valve to realize double-block functions.When the ball valve is closed,body cavity and two of the body ends can be blocked with each other even if both the inlet and outlet are under pressure,when the medium left in the body cavity might be blet through the relief valve
3.Blow-out proof stem
Blow-out proof structure is provited with for the stem,which is positioned by the up-end cap and screw,being guaranteed not to be blow-out by the medium event if at abnormal risen pressure in the cavity
4Anti-static design
The ball of the trunnion ball valve gets close contact with each other through the trunnion,adjusting cushion,and doen end cap,the passage of static electricity thusforms together with the valve,which may lead the static electricity caused by sparks generated by friction between the ball and seat during on and off performance to the ground to prevent the possible risk of fire or explosion.
5.Self-relief in the body cavity
As the liquid medium left in the body cavity gasifies due to increased temperature,the pressure in the body cavity becomes abnormally higher,when the medium itself in the cavity would propel the seat and self-relieves the pressure to ensure the safety of valve.
Trunnion ball valves are suitable for use on various kinds of pipelines of Class150~Class2500,PN16~PN160,JIN 10K~ JIN 20K to cut off or turn on the pipeline medium,of which the operation types include worm gear,manual,pneumatic or electric actuators,being in general of flange connection,and butt welding ends connection as well.
1.Urgent grease injection device
According to customer'requirement,the trunnion ball valves made by lianggong company are provided with devices for urgent grease injection,which are on both the stem and seat for the trunnion Ball valves of DN>150mm(NPS6),and in the body cavity for the valve of DN<125mm.When the O ring of stem or the body seat ring is damage due to accident,the medium leakage between body and stem can be prevented by injecting the sealing grease though the device
2.Double-block and bleed functions
In general,lianggong turnnion ball valve features the front ball sealing design structure. Each seat of the ball valve can separately cut off the medium at both inlet and outlet of the valve to realize double-block functions.When the ball valve is closed,body cavity and two of the body ends can be blocked with each other even if both the inlet and outlet are under pressure,when the medium left in the body cavity might be blet through the relief valve
3.Blow-out proof stem
Blow-out proof structure is provited with for the stem,which is positioned by the up-end cap and screw,being guaranteed not to be blow-out by the medium event if at abnormal risen pressure in the cavity
4Anti-static design
The ball of the trunnion ball valve gets close contact with each other through the trunnion,adjusting cushion,and doen end cap,the passage of static electricity thusforms together with the valve,which may lead the static electricity caused by sparks generated by friction between the ball and seat during on and off performance to the ground to prevent the possible risk of fire or explosion.
5.Self-relief in the body cavity
As the liquid medium left in the body cavity gasifies due to increased temperature,the pressure in the body cavity becomes abnormally higher,when the medium itself in the cavity would propel the seat and self-relieves the pressure to ensure the safety of valve.
6.Fire safe design
With the valve heated in a fire application,the nonmetal material parts such as seat sealing ring of PTFE,O ring for the stem,and sealing gasket for body and bonnet,might be damaged due to high temperature,lianggong's special desigh of auxiliary metal to metal or the graphite seal is provited for the trunnion ball valve to effectively prevent both internal leakage of the valve.As required by customers,Zhedong's fire safe design for the trunnion ball valve meets the requirement of API 607,API 6Fa,BS 6755 and JB/T 6899.
With the valve heated in a fire application,the nonmetal material parts such as seat sealing ring of PTFE,O ring for the stem,and sealing gasket for body and bonnet,might be damaged due to high temperature,lianggong's special desigh of auxiliary metal to metal or the graphite seal is provited for the trunnion ball valve to effectively prevent both internal leakage of the valve.As required by customers,Zhedong's fire safe design for the trunnion ball valve meets the requirement of API 607,API 6Fa,BS 6755 and JB/T 6899.
Standard criteria: ASME/ANSI/API
Connection Standard :ANSI B 16.5
Test Standard :API598 ,API6D
Design Standard :API608, API6D
Face to Face :ANSI B 16.10,API6D
Connection Standard :ANSI B 16.5
Test Standard :API598 ,API6D
Design Standard :API608, API6D
Face to Face :ANSI B 16.10,API6D