44
Control systems Control valves
Materials - DN15 to DN100 (½" to 4") continued
3 Stem lock-nut
Stainless steel A2-70
4 Bonnet gasket
Graphite and stainless steel
5 Seat retainer
Duplex stainless steel ASME A994 CD4MCuN
Seat option
T
Stainless steel 431
Seat option
S
Stainless steel 316L
6 Valve seat ring
Seat option
W
Stainless steel 316L + Stellite TM 6
Seat option
C and P
PEEK
Seat option
G
Stainless Steel 316L + PTFE
7 Seat gasket
Graphite and stainless steel
Seat option
T
Stainless steel 431
Seat option
S
Stainless steel 316L
8 Valve plug and stem
Seat option
W
Stainless steel 316L + Stellite TM 6
Stainless steel 316L for stainless steel valve and Stainless steel 431 for all other materials
Seat option
C/G/P
Bonnet option
P
PTFE glass filled
4.1 20
9 Lower stem guide
Bonnet option
N
Nitronic TM 60
Bonnet option
H
Stellite TM 6
10 Lower stem wiper
Bonnet option
P - N
PTFE
11 Packing guard washer
Stainless steel 316L
12 Spring
Bonnet option
P - N
Stainless steel 316L
13 Packing spacer
Stainless steel 316L
Bonnet option
P - N
PTFE chevron
14 Packing set
Bonnet option
H
Graphite rings
15 Outer 'O' ring
Bonnet option
P - N
VITON TM
Bonnet option
P
PTFE glass filled
16 Upper stem guide
Bonnet option
N
Nitronic TM 60
Bonnet option
H
Stellite TM 6
17 Inner 'O' ring
Bonnet option
P - N
VITON TM
Stainless steel 316L for stainless steel valve and stainless steel 431 for all others materials
18 Gland nut
19 Scrapper ring
Bonnet option
P - N
PTFE
Stainless steel valve
Nickel plated carbon steel
20 Actuator clamp nut
All others
Zinc plated carbon steel
22 Bonnet extension gasket
Graphite and stainless steel
26 Spindle lock and anti-rotation nut
Stainless steel
Stainless steel A2-70 for stainless steel valve and carbon steel Gr.8 for all others
Bolting option
S
27 Nut
Bolting option
H
Stainless steel A2-70
Stainless steel A2-70 for stainless steel valve and carbon steel 8.8 for all others
Bolting option
S
28 Stud
Bolting option
H
Stainless steel A2-70
TI-S24-71 CTLS Issue 20
Page 4 of 23
Spira-trol TM Two-port Control Valves EN Standard K&L Series DN15 to DN100 (½" to 4")
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