44
Control systems Control valves
Spare parts Spare parts are available as indicated. No other parts are supplied as spares.
Available spares Set of sealing rings
3 and 4
2 , 3 , 4 , 5 , 6 , 7 , 8 , and 11
Bonnet assembly
How to order spares Always order spares by using the description given above and state the size and type of valve. Example: 1 - Bonnet assembly for a Spirax Sarco ½ " PV4 piston valve.
7
11 8
6
2
4.1 178
10
Not an available spare
4
5
3
Recommended tightening torques Screwed, socket weld and butt weld
Bolting size
Torque
Item Valve size
No. of bolts
Carbon steel body
Nm
lbs ft
10
½"
5/16"-18 UNC
2
12
8.8
Caution: the torque of the studs is calculated to optime the use of the product. An excessive torque can damage the valve internals (particulary if the product is open). The studs of valve can be retightened to extend the life of it, but only when it is closed and not more than the recommended torque.
TI-P118-06 CMGT Issue 7
Page 4 of 4
PV4 Piston Valve
Powered by FlippingBook