44
Control systems Control valves
Materials Type
No. Part
Material
3 4 5
Stem lock-nut
Stainless steel
AISI 316
Bonnet gasket
Graphite/stainless steel
Seat retainer
Stainless steel with the exception of the full peek option
Seating version T
Stainless steel
AISI 431 S29
Seating versions P and K PEEK Seating version W Stainless Steel 316L + Stellite 6 All others Stainless steel 316L
6
Valve seat ring
7
Seat gasket
Graphite/stainless steel
Stainless steel with the exception of the Nitronic bush option
Body stainless steel
8
Valve plug and stem
All others
Stainless steel 431
DN15 - DN100 ( ½ " - 4") PTFE DN125 - DN200 (5" - 8") Stellite 6
9 *
Lower stem guide
10
DN15 - DN100 ( ½ " - 4") PTFE
Lower stem wiper
11
Packing guard washer
Stainless steel
AISI 316L
4.1 4
All versions using PTFE seals
12
Spring
Stainless steel
BS 2056 316 S42
13 * Packing spacer
Stainless steel
AISI 316
14 * Chevron packing set
PTFE
15
Outer 'O' ring
Viton
16
Inner 'O' ring
Viton
17 * Gland flange
Stainless steel
AISI 304
18 * Gland follower
Stainless steel
19
Gland nut
Stainless steel
A2-70
20
Gland stud
Stainless steel
21
Actuator clamp nut
Plated carbon steel
JE43 and JEA43 JE63 and JEA63 JE83 and JEA83 JE43 and JEA43 JE63 and JEA63 JE83 and JEA83
Carbon steel
Grade 2H
22
Bonnet nut
Stainless steel
Grade 8M
Alloy steel
Grade 7
Carbon steel
Grade B7
23
Bonnet stud
Stainless steel
Grade B8M2
Alloy steel
Grade B16
* Graphite packing Type
* Graphite packing Type
No. Part
Material
No. Part
Material
9
Lower stem guide Stellite 6
15
Not used
13 14 18
Packing spacer
Stainless steel
16
High temperature packing
High temperature packing
Graphoil packing
Graphite ring
Extension gasket (only used with part 2c)
24
Graphite
Gland follower
Stainless steel
11
Extension bolting (only used with part 2c)
Stainless steel
Not used
25
12
TI-S24-60 CTLS Issue 7
Page 4 of 15
Spira-trol TM Two-port Control Valves EN Standard JE, JF and JL DN15 to DN200 and ASME Standard JEA, JFA and JLA ½" to 8"
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