Curtiss-Wright 2600 Series, Maintenance Manual

Page: 7 / 48

7
ANSI Nominal
Inlet Flange Class
0 150
1
300 lightweight
valve
2
300 heavyweight
valve
3 600
4 900
5 1500
6 2500
Designation
Prefix 26 D A 1
(if applicable)
Series Number Orifice Areas Construction Temperatures & Materials
H
*
Set Pressure
Above API 526
SJ
Steam Jacket
HTF
Heat Transfer Fluid
* Available Only on
Q, R, T and U
Orifices
26
A Conventional construction
B
BalanSeal construction
C Conventional with
O-ring seat pressure seal
D BalanSeal with O-ring seat
pressure seal
E
BalanSeal with auxiliary
balancing piston
F BalanSeal with auxiliary
balancing piston and
O-ring seat pressure seal
T Teflon seat, conventional
U Teflon seat, BalanSeal
2 L - 1 2 0 /S4
Inlet Class
Special
Construction (if applicable) Inlet Facing Cap Construction Test Gag
Special
Material
A Expanded API sizes: air, steam
and gas service *
B Expanded API sizes: ASME liquid valve *
C
Expanded API sizes: ASME Code Section
VIII exposed spring design *
D Valve suitable for heat transfer
service-vapor
E Valve suitable for heat transfer
service-liquid
F Expanded API size valves suitable for heat
transfer service-vapor *
G Expanded API size valves suitable for heat
transfer service-liquid
*
H Integral steam jacket expanded API Sizes
– Vapor Service
J Integral steam jacket Vapor Service
K Integral steam jacket – Liquid Service
L ASME Code certified for liquid, air and
steam service
S ASME Code Section VIII exposed
spring design
X Integral steam jacket expanded API sizes
– Liquid Service
* Letter suffixes for expanded API sizes where
2-1/2" inlet or outlet has been replaced by 3" size.
0 Special
2
1 Raised Face, ANSI Std.
(125 to 160 AARH)
2 Large Female, ANSI Std.
3 Small Male, ANSI Std.
4 Small Female, ANSI Std.
5 Large Tongue, ANSI Std.
6 Large Groove, ANSI Std.
7 Small Tongue, ANSI Std.
8 Small Groove, ANSI Std.
9 Ring Joint (octagonal),
ANSI Std.
A
125 AARH Smooth Finish
B
125 AARH (Outlet Only)
C
125 to 160 AARH (Inlet & Outlet)
(now indicated by a ‘1’)
H 63-83 AARH Smooth Finish RF
The following designation can apply to
inlet and/or outlet:
J 63 to 83 AARH (outlet only)
K 63 to 83 AARH (inlet & outlet)
X High pressure hub style connection
2 Screwed Cap
3
Bolted Cap
4 Packed Lever
5
L Type Packed
Lever
6 R Type Packed
Lever
7 Open Lever
8
Remoter
(with Packed
Lever)
0 Without
Gag
1 With Gag
See “Materials
for Corrosive
Service”
Table below.
1. Spring adjusting screw in standard material
2. The springs shown assume bellows construction. For conventional construction, use Inconel X750.
Materials for Corrosive Service
Designation
Special Material Description
Body Bonnet, Cap
Internal Parts
Nozzle & Disc Other Springs & Buttons
/S1 Standard 316 316
1
316 buttons, Chrome Alloy or High Temperature Alloy Nickel Plated spring
/S2 Standard 316 316 316 buttons, Chrome Alloy or High Temperature Alloy Nickel Plated spring
/S3 316 316 316 316 buttons, Chrome Alloy or High Temperature Alloy Nickel Plated spring
/S4 316 316 316 316
/S5 Standard (NACE) 316 316 & Monel w/Inconel 625 bellows Standard
2
/S6 Standard (NACE) 316 316 SAS w/standard bellows Standard
2
/S7 Standard (NACE) 316 316 & Monel w/standard bellows Standard
2
/H1 Standard Hastelloy C Standard Standard
/H2 Standard Hastelloy C Hastelloy C & Monel 316 buttons, Chrome Alloy or High Temperature Alloy Nickel Plated spring
/H3 Hastelloy C ® Hastelloy C Hastelloy C 316 buttons, Chrome Alloy or High Temperature Alloy Nickel Plated spring
/H4 Hastelloy C Hatelloy C Hastelloy C Hastelloy C
/M1 Standard Monel Standard Standard
/M2 Standard Monel Monel 316 buttons, Chrome Alloy or High Temperature Alloy Nickel Plated spring
/M3 Monel Monel Monel 316 buttons, Chrome Alloy or High Temperature Alloy Nickel Plated spring
/M4 Monel Monel Monel Inconel spring, Monel buttons
/N1 Carbon Steel (NACE) 316 (NACE) 316
1
Standard
2
/N4 316 (NACE) 316 (NACE) 316
1
316
2