44
Control systems Control valves
Materials - Stainless steel valves
Material designation ASTM/DIN STD
Type
No.
Part
Material
1
Body
Stainless steel
1.4552
Standard bonnet
Stainless steel
1.4552
2
Extended bonnet
Stainless steel
ASTM A182 F316
3 4
Valve plug
Stainless steel
ASTM A351 CF8M
Valve seat
Stainless steel
ASTM A276 316L
Valve stem
Stainless steel
ASTM A276 316L
5
Bellows
Stainless steel
AISI 316 L
6 7 8 9
Spacer
Stainless steel
AISI 316
Stuffing box gasket
Stainless steel
AISI 304
Lock-nut
Stainless steel
AISI 316
Stuffing box
Stainless steel
AISI 316
10
Mounting nut
Zinc plated steel
NFA 35553 XC 18S
Stainless steel
11
Packing
PTFE/graphite
PTFE/graphite
4.1 118
12 13 14 15 16
Spring
Stainless steel
BS 2056 316 S42
Bonnet gasket
Graphite
Stud
Stainless steel
A193 B8
Nut
Stainless steel
A194 Gr. 304
Lock-nut
Stainless steel
AISI 316
17
Guide bush
PTFE
18 19 20
Stem guide bush
Stainless steel
Hard faced AISI 316
Lock-nut
Stainless steel
AISI 316
Pin
Stainless steel
AISI 316
21
Gasket
Graphite
22
Anti-rotation screw
Stainless steel
AISI 304
TI-P359-14 CTLS Issue 8
Page 6 of 11
QLM and QLD Three-port Control Valves
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