Below-the-line maintain of ball valve
The replacement of Seat2, and replacement of o-rings 6, sealing gaskets39.
Seat, ball valve, the valve stem, the seal of the replacement and repair to advance from the pipe valves will be removed to.
Two pieces of fractional ball valve
(1) close valves on the downstream, stop valve.which deflated unloading valve and the pressure piping.
(2) close valve is in full close state, make. Thus, the demolition of pneumatic device driver pneumatic pipe.
(3) will be removed from the valve and pipe placed so that the body connect body over 26 upward.
(4) shake off nut, remove the body after August 26 body.
(5) removed seat 2 and o-rings 63.
(6) from the valve body and connect in o-rings 6 and gasket.
(7) Remove the ball and.
(8) removed at the other end of the seat 2 and o-rings 63.
(9) check valve (1), 3 and body connect body and, if there is, will damage repair parts clean.
(10) lubrication seat sealing surface and installation installed slot.
(11) will be new o-rings 6, sealing gaskets and into the body after the installation slot.
(12) pre-segregation o-rings 63 into seat 2, 2 in the body seat and valve connect body 26 January.
(13) the ball into the body 1, 3, the valve stem must match the goal of 4 slot.
(14) will connect body on January 26 valve body, with eight solid tight. Nuts,
(15) mount pneumatic pipe (pneumatic actuator ball) and operating drives check flexibility.
(16) tightness test.
(17) on line by line, and required gas-tight test.
three piece ball valve
(1) close valves on the downstream, stop valve.which deflated unloading valve and the pressure piping.
(2) close valve is in full close state that.
(3) will be removed from the valve and pipeline to turn up the body place one body and upward.
(4) shake off nut, remove the body after August 26 body.
(5) removed, 20, the spring seat o-rings 17.
(6) from the valve body and connect in o-rings 6 and gasket.
(7) Remove the ball and.
(8) the other side body connect turned up, according to the body, 26 (4) to (6) order will be on the other side of the parts.
(9) check valve, valve, the ball up any injury, body and repair. Clean the part.
(10) lubrication seat sealing surface and installation installed slot, will the new o-rings 6, sealing gaskets and into the body connect body 26 installation slot.
(11) will be new o-rings 17 in the new seat, will spring 20 in related position.
(12) to the ball into the body 1, 3, the valve stem must match the four goals in three slot.
Stem and disc rotating 90o will open. 2 sets of seat on the ball, and then connect body of valve to July 26, studs and body connect body and insert the body and seat insert body connect body fitly 2 26.
(13) with (12) method into the other end of the seat and valve connect body 26 February.
(14) screw nut 8.
(15) operation drives check flexibility.
(16) tightness test.
(17) on line by line, and required gas-tight test
The valve fully decomposition, o-rings 21 and thrust washers 31and replacement.
(1) according to section 2.3 dismantling the ball decomposition.
(2) according to section 2.2 decomposition.
(3) remove stem 4, thrust washers 31 and o-rings 21.
(4) check each parts, such as damage repair, there will be various parts clean.
(5) lubrication, stem seal the besmear on a thin layer of grease.
(6) on new o-rings 21 and thrust washers, 31, loaded on the valve stem.
(7) according to section 2.2 assembly.
(8) according to section 2.3 assembly.
(9) operation drives check flexibility.
(10) Air tightness test.
(11) on line by line, and required gas-tight test.
