Samson 3251-E - Page 24

3-8 EB 8052-E EN
Design and principle of operation
Table 3-2: Materials
Standard version
Body
Cast steel
A216 WCC
Cast stainless steel
A351 CF8M
Valve bonnet A216 WCC A351 CF8M
Plug or piston stem 316/316L or XM-19-H
Seal ring for balanced plug PTFE with carbon
Guide bushing 430F nitrated 316/316L nitrated
Packing
PTFE packing loaded by internal or external springs or adjustable
graphite packing
Body gasket Spiral wound gasket, graphite/316L
Version with
screwed-in seat
and plug
Plug
3)
4102
2)
420
1)
316/
316L
2)
316/316L
2)
Seat 4102
2)
420
1)
316/
316L
2)
316/316L
2)
Fastening
of the seat
4102 316/316L
Version with
clamped-in seat
and plug
Plug
3)
4102
2)
420
1)
316/
316L
2)
316/316L
2)
Seat 4102
2)
420
1)
316/
316L
2)
316/316L
2)
Fastening
of the seat
A217WC9 A351 CF8M
Version with piston
and cage
Piston 4102
1)
420
1)
316/
316L
4)5)
316/316L
4)5)
Cage 4102
1)
420
1)
316/316L 316/316L
Seat 4102
1)
420
1)
316/
316L
2)
316/316L
2)
Cylinder 4102
1)
420
1)
316/316L
1)
Heat treated
2)
Also Stellite
®
-faced facing
3)
Plug made of Stellite
®
6 (up to C
V
420) available
4)
Guiding surface with hard chrome plating
5)
Guiding surface also Stellite
®
faced when the facing is Stellite
®
-faced