44
Control systems Control valves
Materials
NC (Normally Closed)
NO (Normally Open)
8
8
9 10
10
9
2
2
6 11 and 12
5 3
5 3 4
6 11 and 12
4
4.1 148
1
1
BD (Bi-Directional normally closed)
8
10
9
2
5
6 11 and 12
3
4 1
No.
Part
Material
No.
Part
Material
1 2 3 4 5 6
Body
Bronze
EN 1982 CC491K
Stem 'O' ring ( not shown)
7*
Viton
Bonnet
Bronze ½" and 1" EN 1982 CC491K
8 9
Actuator housing Glass filled polyamide
Plug
Stainless steel
AISI 316L
Piston
Glass filled polyamide
Valve plug seal
PTFE
10
Piston lip seal
Viton
Valve stem Stainless steel
AISI 316
11
Gasket
PTFE
Stem seals
PTFE chevrons
TI-P373-14 CMGT Issue 7
Page 4 of 12
PF51G BronzePiston Actuated On/Off Valves
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