Data Sheet

YD and YS Valves
D100031X012
Product Bulletin
51.1:YD
June 2014
17
Table 7. Maximum Allowable Fisher YS (Converging Service) 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 IV Seat Leakage (Continued)
ENVIRO-SEAL
Graphite ULF
70
(4)
--- --- ---
25
(9-24)
1N1287
39
(10-22)
1N1284
---
99
(14-29)
1N1287
Graphite Ribbon/
Filament (CL300)
45 --- --- ---
4
(8-24)
1E8266
--- ---
25
(11-31)
1E8272
46
5
(5.5-11.5)
1F1773
--- ---
10
(6-26)
1E8271
26
(7.5-21)
1E8272
--- ---
76
(4)
(667 Only)
--- --- ---
17
(8-24)
1N1284
48
(11-22)
(3)
1N1286
---
90
(15-26)
(3)
1N1286
70
(4)
7
(5-13)
1N1286
--- ---
22
(6-26)
1N7193
66
(9-24)
1N1287
81
(10-22)
1N1284
139
(14-29)
1N1287
NPS 6, 7-Inch Port, Cl ass IV Seat Leakage
(5)
Standard
Single or
Double PTFE
60 --- --- ---
5
(7.5-21)
1E8272
--- --- ---
76
(667 Only)
--- --- ---
7
(8-24)
1N1284
19
(11-22)
(3)
1N1286
---
35
(15-26)
(3)
1N1286
70
3
(5-13)
1N1286
--- ---
8
(6-26)
1N7193
26
(9-24)
1N1287
31
(10-22)
1N1284
54
(14-29)
1N1287
80
(4)
10
(5-13)
1H7477
--- ---
25
(7-26)
1H7476
39
(8-24)
1H7473
47
(9-22)
1H7475
77
(13-29)
1H7473
ENVIRO-SEAL PTFE
76
(667 Only)
--- --- ---
15
(11-22)
(3)
1N1286
--- ---
31
(15-26)
(3)
1N1286
70 --- --- ---
5
(6-26)
1N7193
22
(9-24)
1N1287
28
(10-22)
1N1284
51
(14-29)
1N1287
80
(4)
5
(5-13)
1H7477
--- ---
20
(7-26)
1H7476
34
(8-24)
1H7473
42
(9-22)
1H7475
103
(13-29)
1H7473
ENVIRO-SEAL
Graphite ULF
76
(667 Only)
--- --- --- --- --- ---
10
(15-26)
(3)
1N1286
70 --- --- ---
7
(10-22)
1N1284
--- ---
30
(14-29)
1N1287
80
(4)
--- --- ---
7
(9-22)
1H7475
--- ---
36
(13-29)
1H7473
Graphite Ribbon/
Filament (CL300)
76
(667 Only)
--- --- ---
10
(11-22)
(3)
1N1286
--- ---
27
(15-26)
(3)
1N1286
70 --- --- ---
17
(9-24)
1N1287
23
(10-22)
1N1284
---
46
(14-29)
1N1287
80
(4)
--- --- ---
13
(7-26)
1H7476
27
(8-24)
1H7473
35
(9-22)
1H7475
65
(13-29)
1H7473
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. Oversize yoke boss required.
5. Special Class 4 seat load (40 lb/lineal inch) used for YS, 7-inch port.