Page 1
- 244 -
FIGURE 760/765
SERIES
APPLICA TION
DATA
●Especially recommended where corrosive or expensive
gases benefit from stainless steel construction.
● Overpressure relief of tanks, pipelines, vessels, pumps
●Stationary Cryogenic storage tanks
●Dual Safety relief systems
●Air and gas compressors
A
PPLICABLE CODES
●CGA S-1.2 and S-1.3.
●V-4301 (Cryogenic Non-Oxygen)
●V-4401 (Oxygen)
●ASME sec.VIII
●API 527
●AD-Merkblatt A2
●CRN 0G0591.9C
OPTIONS
●Large and Extra Large Capacity
●BSP threads are available on most sizes.
●Lever operation
● Electropolish
●Test Reports available
MODELS
●760
Stainless Steel ASME w/O2cleaning
●765 Stainless Steel PED
w/O2cleaning
FIGURE 760/765 SERIES
RXSO-S STAINLESS STEEL
SIZES 1⁄2" – 1"
PRESSURES to 400 PSIG at 400ºF
●Special Teflon® seat, making bubble-tight seals
possible to over 90% of set pressures per spec
API 527; not applicable to steam.
●Adjustable blowdown ring
●Cleaned and packaged for use in O2
service in compliance with the CGA
specification G-4.1
Additional cleaning specifications:
●
4WPI-SW70003 ● ES.660.503
● GS-38 ● GS-40
Max
Dimensions
Inlet Orifice Outlet Part # PSI
ABC
Wgt.
(barg)
1/2 A 3/4 760NACD 400 5 7⁄8 2 9⁄16 1 5⁄16 2
(15) (20) (27.6) (150) (65) (34) (.91)
3/4 A 3/4 760NADD 400 5 7⁄8 2 9⁄16 1 5⁄16 2
(20) (20) (27.6) (150) (65) (34) (.91)
1/2 A 1 760NACE 400 6 1⁄2 2 13⁄16 1 11⁄16 3
(15) (25) (27.6) (166) (71) (43) (1.36)
3/4 A 1 760NADE 400 6 1⁄
2 2
13
⁄
16 1
11
⁄
16 3
(20) (25) (27.6) (166) (71) (43) (1.36
1/2 B 1 760NBCE 400 7 3⁄
8 2
7
⁄
8 1
11
⁄
16 4
(15) (25) (27.6) (188) (74) (42) (1.82)
3/4 B 1 760NBDE 400 7 3⁄8 2 7⁄8 1 11⁄16 4
(20) (25) (27.6) (188) (74) (42) (1.82)
1 B 1 760NBEE 400 7 3⁄8 2 7⁄8 1 11⁄16 4
(25) (25) (27.6) (188) (74) (42) (1.82)
1/2 B 1 1⁄4 760NBCF 400 7 1⁄2 31
7
⁄8 5
(25) (32) (27.6) (190) (76) (48) (2.27)
3/4 B 1 1⁄4 760NBDF 400 7 1⁄2 31
7
⁄8 5
(20) (32) (27.6) (190) (76) (48) (2.27)
1B1
1
⁄4 760NBEF 400 7 1⁄2 31
7
⁄8 5
(25) (32) (27.6) (190) (76) (48) (2.27)
DIMENSIONS inches (mm) AND WEIGHTS pounds (kg)
NOTE: 765 (PED) Valve Combinations are the same as the 760’s listed above.
760NBDE-A025
CODE SELECTION CHART
1234567891011
Model Cap Orifice Inlet Outlet – Valve Set Pressure
Size Size Service
Orifice -
Position 5
A
B
Inlet Size -
Position 6
C=
1
⁄2
D= 3⁄4
E= 1
Model - Position 1, 2 & 3
760 = ASME w/O
2
cleaning
765 = PED w/O2cleaning
Cap - Position 4
N = Plain Cap
E = Open Lever
Outlet Size -
Position 7
D=
3
⁄4
E= 1
F= 1
1
⁄4
Valve Service - Position 8
A = Air/Gas Sect. VIII
E = Air/Gas PED
Z = Other
Set Pressure - Position 9, 10 & 11
__ __ __ = Actual Setting
Page 2
- 245 -
FIGURE 760/765
SERIES
FIGURE 760/765 SERIES
RXSO-S STAINLESS STEEL
SPECIFICATION
The valve shall meet the ASME Section VIII code for air and gas
services. It shall be “UV” National Board Certified. The valve shall
have an adjustable blowdown ring. The valve shall have a Teflon(r)
seat and conform to API 527. The valve shall be cleaned and
packaged for use in Oxygen service in compliance with CGA
specification G-4.1. The valve shall be 316SS except the spring (177PH SS).
MATERIALS OF C
ONSTRUCTION
Shell …………………Investment Cast 316SS, ASME SA-351
Base…………………Investment Cast 316SS, ASME SA-351
Trim ……………………………………316SS, ASME SA-479
Spring ……………………………………………StainlessSteel
17-7 PH ASTM A-313, Type 631
AIR CAPACITY TABLE
Discharge capacities in cubic feet per minute of air at 10% or 3 PSI, whichever is greater, overpressure.
Inlet Sizes
1/2
Inches
1/2 3/4
3/4 1
Outlet Sizes
3/4
Inches
11
1
⁄
4
Seat Diameter
AB
Inches
0.750 1.000
Flow Area
0.118 0.204
Set Pressure
10 36 63
15 43 74
20 48 85
25 55 96
30 62 108
35 70 120
40 77 133
45 84 145
50 91 157
55 98 170
60 105 182
65 113 195
70 120 207
75 127 220
80 134 232
85 141 244
90 149 257
95 156 269
100 163 282
105 170 294
110 177 307
115 184 319
120 192 331
125 199 344
130 206 356
135 213 369
Inlet Sizes
1/2
Inches
1/2 3/4
3/4 1
Outlet Sizes
3/4
Inches
11
1
⁄
4
Seat Diameter
AB
Inches
0.750 1.000
Flow Area
0.118 0.204
Set Pressure
140 220 381
145 228 393
150 235 406
155 242 418
160 249 431
165 256 443
170 264 456
175 271 468
180 278 480
185 285 493
190 292 505
195 299 518
200 307 530
205 314 543
210 321 555
215 328 567
220 335 580
225 343 592
230 350 605
235 357 617
240 364 629
245 371 642
250 378 654
255 386 667
260 393 679
265 400 692
Inlet Sizes
1/2
Inches
1/2 3/4
3/4 1
Outlet Sizes
3/4
Inches
11
1
⁄
4
Seat Diameter
AB
Inches
0.750 1.000
Flow Area
0.118 0.204
Set Pressure
270 407 704
275 414 716
280 422 729
285 429 741
290 436 754
295 443 766
300 450 779
305 458 791
310 465 803
315 472 816
320 479 828
325 486 841
330 493 853
335 501 866
340 508 878
345 515 890
350 522 903
355 529 915
360 537 928
365 544 940
370 551 952
375 558 965
380 565 977
385 990 989
390 580 1002
395 587 1015
400 594 1027
Loading...