Top entry ball valves are developed upon the advanced technology and through many years of design and manufacturing experience,with our technology and design capabilties,our valves can compete with international counterparts.Besides the features borne by the side entry fixed ball valve(see fixed ball valve),they are also given the features below:
1,one-piece valve body,top entry trunnion,flanged or butt welded structure.
2,Inconel seat springs maintain consistent force to keep the metal seat in contact with the ball,providing the two way seal function.
3,Adopting distinctive technology of retractable valve seats,on side replace stem,valve stem sealing ring,metal seat and bellow spring,and torque down to the minimum for the ease of operation.
4,ease of repair and installation and long preformance life.Access for repair and replacement of trims can be done without removing the valve from the pipline,thus to lengthen the service life and reduce down time.
5,Low torque,reliable sealing,and spherical seat different from ordinary ball valves,which can automatically adjust the position of seal.
6,Actuator mounting flange for drive device to ISO 5211.Drive device can be installed according to user's different requirements.
7, DBB(double block and bleed) function.
8,Hand operated top entry ball valve adopts high strength one-piece stem structure to ensure the precise positioning of the ball.
9,Anti-blowout proof structure of valve stem to enhance the operational safety of the valve.
Top entry ball valve,Size:2"~36"(DN50~DN900),Class:150~1500,Material:LCB,CF8,CF8M,304,316,Alloy steel Temperture ℃ 200~250,Applied standard:ISO17929,ANSI B16.34,ANSI B16.10,B16.25,Flange teyp:RF,RTJ,BW,Structure:Top entry,Operation:Manual(worm gear),Pneumatic,Electric,Suitable Medium:water,steam,oil,acids,chloride.
Dependable seating design:The flexible two-way sealing structure embodies years of our manufacturing experience in ball valves.the internationally advanced flexible seal technology can release the pressure in the valve cavity while maintaining a reliable seal under high or low pressures or vacuum.when the media pressure is low,the contact area between flexible seat and the ball is relatively small providing a dependable seal without seat deformtion or high wear load.in the same way,when the media pressure is high,the contact area between flexible seat and the ball increases providing proper support while maintaining a dependable seal,again without seat deformation or high wear load.the flexible seat design in our floating ball valves maintains proper seat to ball contact so that even in very low pressure
application,a proper seal is maintained.we can also furnish a Bellville spring assisted seat to assist in conditions of low pressures and high wear to ensure a dependable seal.valves to be used in medium and high temperature applications can utilize PPL or PEEK as a seat material and can be used in temperatures of 300℃.ball valves with metal seal and high temperature resisting materials can be used to deal with even higher temperature and pressures.
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