Pilot Type Descriptions; Pilot Pressure Ratings - Fisher EZR Instruction Manual

Type EZR
Table 2. Outlet (Control) Pressure Ranges, Proportional Bands, and Pilot Control Spring Information
OUTLET (cOnTROL)
TYPE
PRESSURE RAnGE
6 to 15-inches w.c.
0.5 to 1.2 psig
161AY or
1.2 to 2.5 psig
161AYM
2.5 to 4.5 psig
4.5 to 7 psig
5 to 15 psig
10 to 40 psig
161EB or 30 to 75 psig
161EBM 70 to 140 psig
130 to 200 psig
200 to 350 psig
161EB 30 to 300 psig (2,1 to 20,7 bar)
(4)
OUTLET (cOnTROL)
TYPE
PRESSURE RAnGE
14.5 to 26 psig
23 to 44 psig
41 to 80 psig
PRX/120
73 to 123 psig
PRX/125
116 to 210 psig
203 to 334 psig
319 to 435 psig
PRX/120-AP
435 to 1000 psig (30,0 to 69,0 bar)
PRX/125-AP
1. Proportional band and Accuracy Class include outlet pressure drop plus hysteresis (friction), but do not include lockup.
2. Proportional band was determined with a pressure drop ranging from 50 to 150 psig (3,5 to 10,3 bar). Approximately double the proportional band if the pressure drop is less
than 50 psig (3,5 bar).
3. With Type 112 restrictor set on 2. With Type PRX restrictor turn the restrictor screw one turn counterclockwise from fully seated.
4. Should only be used as the intermediate reduction pilot on the Type EZR worker/monitor systems.
MAXIMUM INLET
TYPE PRESSURE,
PSIG (bar)
161AY 150 (10,3)
161EB 1500 (103)
161AYM 150 (10,3)
161EBM 1500 (103)
PRX Series 1480 (102)
1. Maximum pressure to prevent the casings from bursting during abnormal operation (leaking to atmosphere and internal parts damage may occur).
As the outlet pressure rises toward the outlet pressure
setting, it compresses the pilot diaphragm against the
pilot control spring and allows the pilot valve plug or
disk close. Loading pressure begins building on the
Type EZR diaphragm and plug assembly. The loading
pressure, along with force from the main spring,
pushes the diaphragm and plug assembly onto the
tapered-edged seat, producing tight shutoff.

Pilot Type Descriptions

Type 161AY—Low-pressure pilot with an outlet
pressure range of 6-inches w.c. to 7 psig
(15 mbar to 0,48 bar). Pilot bleeds (exhausts)
downstream through the sense (control) line.
4
PROPORTIONAL BAND
(15 to 37 mbar) 1-inch w.c.
(34 to 83 mbar) 1-inch w.c.
(83 mbar to 0,17 bar) 0.5 psig
(0,17 to 0,31 bar) 0.5 psig
(0,31 to 0,48 bar) 0.5 psig
(0,35 to 1,0 bar) 0.5 psig
(0,69 to 2,8 bar) 0.5 psig
(2,1 to 5,2 bar) 0.6 psig
(4,8 to 9,7 bar) 1.3 psig
(9,0 to 13,8 bar) 1.5 psig
(13,8 to 24,1 bar) 3 psig
6 psig (0,41 bar)
AccURAcY cLASS (Ac)
(1,00 to 1,8 bar) 2.5%
(1,6 to 3,0 bar) 2.5%
(2,8 to 5,5 bar) 2.5%
(5,0 to 8,5 bar) 2.5%
(8,0 to 14,5 bar)
(14,0 to 23,0 bar)
(22,0 to 30,0 bar)
Table 3. Pilot Pressure Ratings
MAXIMUM EMERGENCY
OUTLET PRESSURE OR
MAXIMUM EMERGENCY
SEnSE PRESSURE , PSIG (bar)
(1)
150 (10,3)
1200 (82,7)
150 (10,3)
1200 (82,7)
1480 (102)
PILOT CONTROL SPRING INFORMATION
(1)(3)
Part Numbers
(3 mbar) 1B653927022
(2)
(3 mbar) 1B537027052
(2)
(34 mbar) 1B537127022
(2)
(34 mbar) 1B537227022
(2)
(34 mbar) 1B537327052
(2)
(34 mbar) 17B1260X012
(2)
(34 mbar) 17B1262X012
(2)
(41 mbar) 17B1259X012
(2)
(90 mbar) 17B1261X012
(2)
(0,10 bar) 17B1263X012
(2)
(0,21 bar) 17B1264X012
(2)
15A9258X012
PILOT CONTROL SPRING INFORMATION
(1)
Part Numbers
GD25524X012
GD25523X012
GD25518X012
GD25522X012
1% GD25521X012
1% GD25520X012
1% GD25586X012
1% GD27379X012
MAXIMUM OUTLET
(ExHAUST) PRESSURE
PRESSURE,
FOR MONITOR PILOTS,
PSIG (bar)
150 (10,3)
750 (51,7)
- - - -
1480 (102)
Type 161AYM—The monitor version of the Type 161AY
pilot. The pilot bleed (exhaust) is isolated from the sense
(control) line. This pilot is used in monitoring systems
requiring an isolated pilot bleed (exhaust).
Type 161EB—High accuracy pilot with an outlet
pressure range of 5 to 350 psig (0,34 to 24,1 bar).
Pilot bleeds (exhausts) downstream through the sense
(control) line.
Type 161EBM—The monitor version of the Type 161EB
pilot. The pilot bleed (exhaust) is isolated from the sense
(control) line. This pilot is used in monitoring systems
requiring an isolated pilot bleed (exhaust).
Type PRX/120—Outlet pressure range of 14.5 to
435 psig (1,00 to 30,0 bar). The Type PRX/120 can be
wire Diameter,
Color Code
Inches (mm)
Olive drab 0.105 (2,67)
Yellow 0.114 (2,90)
Light green 0.156 (3,96)
Light blue 0.187 (4,75)
Black 0.218 (5,54)
White 0.120 (3,05)
Yellow 0.148 (3,76)
Black 0.187 (4,75)
Green 0.225 (5,71)
Blue 0.262 (6,65)
Red 0.294 (7,47)
Green 0.243 (6,17)
wire Diameter,
Color Code
Inches (mm)
Yellow 0.110 (2,79)
Green 0.126 (3,20)
Blue 0.138 (3,50)
Black 0.157 (3,99)
Silver 0.177 (4,50)
Gold 0.197 (5,00)
Aluminum 0.236 (5,99)
Clear 0.335 (8,51)
MAXIMUM BLEED MAXIMUM SENSE
(cOnTROL) PRESSURE
FOR MONITOR PILOTS,
PSIG (bar)
- - - -
150 (10,3)
1500 (103)
1480 (102) 1480 (102)
Free Length,
Inches (mm)
3.75 (95,2)
4.31 (109)
4.13 (105)
3.94 (100)
4.13 (105)
3.75 (95,2)
3.75 (95,2)
4.00 (102)
3.70 (94,0)
3.85 (97,8)
4.22 (107)
1.88 (47,7)
Free Length,
Inches (mm)
2.16 (54,9)
2.16 (54,9)
2.00 (50,8)
2.00 (50,8)
3.93 (99,8)
PSIG (bar)
- - - -
150 (10,3)
750 (51,7)