44
Control systems Control valves
Materials - ½" to 4" (continued) 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 + Stellit TM 6
Seat option C and P
PEEK
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 + Stellit TM 6
Stainless steel 316L for Stainless steel valve and Stainless steel 431 for all other materials
Seat option C and P
Bonnet option P
PTFE glass filled
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
4.1 60
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 A194 Gr8M for Stainless Steel valve and A194 2H for others valves Stainless steel A193 GrB8M2 for Stainless Steel valve and A193 B7 for others valves
27 Nut
28 Stud
TI-S24-72 CTLS Issue 7
Page 4 of 23
Spira-trol TM Two-port Control Valves ASME Standard K and L Series ½" to 4"
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