Data Sheet

YD and YS Valves
D100031X012
Product Bulletin
51.1:YD
June 2014
18
Table 8. Maximum Allowable Fisher YS (Diverging Service) Shutoff Pressure Drops with 657 and 667 Actuators
(ON-OFF) application only–No throttling service
(1)
PACKING TYPE ACTUATOR SIZE
NOMINAL (ACTUAL) AIR TO DIAPHRAGM, PSIG
(2)
3-15 (0-18) 6-30 (0-33) 3-40 (0-43)
nP
(6)
, PSID/(Bench Set, PSIG)
(7)
/Spring Drawing Number
1.3125 Inch Port, Class IV Seat Leakage
Standard
Single or
Double PTFE
30
195
(5-13)
1F1768
450
(4.5-28.5)
1E7924
---
34
315
(3-15)
1E8058
600
(4.5-28.5)
1E8052
---
ENVIRO-SEAL PTFE
30
145
(7-11)
(3)
1J1722
385
(8-24)
1J2581
---
34
265
(5-13)
1E8053
600
(6-26)
1E8051
---
ENVIRO-SEAL
Graphite ULF
34 ---
400
(10-22)
1E8058
---
Graphite Ribbon/
Filament (CL300)
30 ---
330
(8-24)
1J2581
---
34
210
(6-12)
1E8056
570
(6-26)
1E8051
---
2.3125 Inch Port, Class IV Seat Leakage
Standard
Single or
Double PTFE
40
50
(6-12)
1F1771
210
(6-26)
1E8054
---
45
155
(4-14)
1E8270
330
(4-28)
1E8264
---
ENVIRO-SEAL PTFE
40 ---
190
(7-25)
1E8058
---
45
120
(5-12)
1E8269
310
(6-26)
1E8263
---
ENVIRO-SEAL
Graphite ULF
45 ---
225
(9-24)
1E8268
---
46
120
(6-12)
1E8266
380
(7-25)
1E8257
---
Graphite Ribbon/
Filament (CL300)
40 ---
280
(9-24)
1E8057
---
45
105
(6-11)
1F1773
295
(6-26)
1E8263
---
-continued-