Data Sheet

YD and YS Valves
D100031X012
Product Bulletin
51.1:YD
June 2014
19
Table 8. Maximum Allowable Fisher YS (Diverging Service) Shutoff Pressure Drops with 657 and 667 Actuators
(ON-OFF) application only–No throttling service
(1)
(continued)
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
3.4375 Inch Port, Class IV Seat Leakage
Standard
Single or
Double PTFE
40 --- ---
125
(8-32)
1E8058
45
65
(5-12)
1F1773
150
(6-26)
1E8268
---
46
110
(4-14)
1E8272
225
(6-26)
1E8267
---
ENVIRO-SEAL PTFE
45
55
(6-11)
(3)
1E9215
140
(6-26)
1E8268
---
46
100
(4-14)
1E8272
215
(4-28)
1E8257
---
ENVIRO-SEAL
Graphite ULF
45 ---
95
(10-22)
1E8266
---
46 ---
170
(7-25)
1E8263
---
Graphite Ribbon/
Filament (CL300)
45 ---
130
(7-25)
1E8265
---
46
90
(5-13)
1E8266
210
(6-26)
1E8267
---
4.375 Inch Port, Class IV Seat Leakage
Standard
Single or
Double PTFE
45
40
(6-12)
(3)
1E9215
90
(6-26)
1E8272
---
46
65
(5-13)
1E8269
140
(6-26)
1E8271
---
ENVIRO-SEAL PTFE
45 ---
85
(7-25)
1E8270
---
46
60
(5-13)
1E8269
135
(6-26)
1E8271
---
ENVIRO-SEAL
Graphite ULF
45 --- ---
55
(11-31)
1E8272
46 ---
50
(7.5-21)
1E8272
---
70
(4)
---
135
(9-24)
1N1287
---
Graphite Ribbon/
Filament (CL300)
45 ---
80
(8-24)
1E8266
---
46
55
(5-13)
1E8269
130
(6-26)
1E8271
---
-continued-