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Fig.1
Fig.2
Fig.3
10. ASSEMBLY OF THE VALVE
For the assembly it is suggested to place the valve in
vertical position clamped on the work bench.
1.
Insert the first seat (fig.1 - 6)
2.
Lubricate stem thread and place internal packing
ring
(even spring and ball if antistatic design required);
3.
Insert the stem through the side of the valve, be
careful not to damage the sealing surface; guide it
up to the stem bore;
4.
Holding up the stem, insert external packing rings,
the gland ring
5.
Place locking clip if any;
6.
Thread the stem nut onto the stem. Tighten the stem
nut;
7.
Place the lever and the stem nut; tight the nut;
8.
Place levers in closed position;
9.
Place the ball and maintaining the lever in close
position to prevent the ball from falling;
10.
Place second seat (fig.1 – 4) and then the spacer (if
any);
11.
Place closure gasket ring on closure fitting and put
a small quantity of lubricant on thread to help its
insertion on body;
12.
Place closure on its body housing and tight;
13.
Leave the valve in open position for line flushing.
14.
Repeat from p.1 for the other ball
For bonnet:
1.
Prepare the new bonnet with needle in open
position;
2.
Screw the bonnet on its body housing and tight;
3.
Place the red cap pushing it on the packing gland;
4.
Place T bar on stem and the screw from the side of
T bar;
5.
Place new seal ring on body and then screw the
body bonnet into the valve body.
