Data Sheet
YD and YS Valves
D100031X012
Product Bulletin
51.1:YD
June 2014
14
Table 6. Maximum Allowable Fisher YD Shutoff Pressure Drops with 657 and 667 Actuators
(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, PSID/(Bench Set, PSIG)/Spring Drawing Number
4.375 Inch Port, Class II Seat Leakage (High-Temperature Trim)
Graphite Ribbon/
Filament (CL600)
45
200
(6-12)
(3)
1E9215
--- ---
200
(6-26)
1E8272
720
(7-25)
1E8270
1250
(8-24)
1E8266
1500
(9-33)
1E8265
46
950
(5-13)
1E8269
--- ---
1500
(6-26)
1E8271
--- --- ---
ENVIRO-SEAL
Graphite ULF
45 --- --- ---
250
(8.5-24.5)
1E8266
--- ---
520
(9-33)
1E8265
46
70
(5.5-11.5)
1F1773
--- ---
470
(6-26)
1E8271
1260
(7-23)
1E8265
1500
(7.5-21)
1E8272
---
NPS 6, 7 Inch Port, Class IV Seat Leakage
(4)
Standard
Single or
Double PTFE
50 --- --- --- --- --- ---
370
(11-31)
1E8272
60 --- --- ---
405
(7.5-21)
1E8272
--- --- ---
70
250
(5-13)
1N1286
--- ---
750
(6-26)
1N7193
1500
(8-23)
1N1287
--- ---
ENVIRO-SEAL PTFE
50 --- --- --- --- --- ---
60
(11-31)
1E8272
60 --- --- ---
95
(7.5-21)
1E8272
--- --- ---
70 --- --- ---
430
(6-26)
1N7193
1450
(8-23)
1N1287
1500
(10-22)
1N1284
---
ENVIRO-SEAL
Graphite ULF
76
(667 only)
--- --- --- --- --- ---
200
(13-29)
1N1284
70 --- --- ---
590
(10-22)
1N1284
--- ---
1500
(13-28)
1N1287
NPS 6, 7 Inch Port, Class II Seat Leakage (High-Temperature Trim)
Graphite Ribbon/
Filament (CL600)
50 --- --- --- --- --- ---
125
(11-31)
1E8272
60 --- --- ---
160
(7.5-21)
1E8272
--- --- ---
70 --- --- ---
500
(6-26)
1N7193
1500
(8-23)
1N1287
--- ---
ENVIRO-SEAL
Graphite ULF
76
(667 only)
--- --- ---
490
(11-22)
(3)
1N1286
--- ---
1200
(13-29)
1N1284
70 --- --- ---
590
(8-23)
1N1287
1500
(10-22)
1N1284
--- ---
1. Spring and bench sets selected for use with either 657 or 667. Other acceptable configurations possible from Fisher Specification Manager for a specific actuator type.
2. The bench set values shown assume an actual supply pressure to the actuator of 0 to 18 psig for a nominal 3 to 15 psig signal, an actual 0 to 33 psig supply for a nominal 6 to 30 psig signal,
and an actual 0 to 43 psig supply for a nominal 3 to 40 psig signal. Any positioner or controller used with these actuators must be capable of delivering the appropriate slightly extended range.
3. Requires non-standard spring adjustor.
4. Special Class IV seat load (40 lb/lineal inch) used for YD with 7-inch diameter port.