Brochure

Parker Hannifin Corporation
Climate & Industrial Controls Group
Cleveland, OH
Catalog CIC-2003-1/US
358
Industrial Refrigeration Products: Pressure Regulators
A4 Adaptomode
®
Series
Dimensions
Basic Inlet Regulators, 20-100mm (¾" - 4")
A4 inlet regulators open on a rise in inlet pressure above
the set point and close on a drop in inlet pressure below the
set point. The inlet pressure set point is not appreciably
affected by variations in outlet pressure.
Regulators are pilot operated using upstream pressure for
the opening force and requires a minimum 0.14 bar (2 psig)
pressure drop to fully open. They modulate the flow of
refrigerant gas or liquid to maintain constant upstream (or
inlet) pressure as set-for, despite load fluctuations.
A4B
A4S
A4Z
A4D
The A4D dual pressure regulator is capable of regulating
at two different set points using a pair of pilot regulators
controlled by a solenoid valve. A4DD regulates three set
points (low/mid range/high).
The A4K reseating relief regulator is factory set and
sealed at a specified set-point.
The A4AR is a main valve only and will control pressures
as determined by the remote pilot(s) piped to it.
See Pages 370-371 for weld end body regulators.
A4
A4E
A4K
OVERALL VALVE DIMENSIONS
Port Size 20mm & 25mm 32mm 40mm & 50mm 65mm 75mm 100mm
(3/4" & 1") (1-1/4") (1-5/8" & 2") (2-1/2") (3") (4")
DIMENSION mm inches mm inches mm inches mm inches mm inches mm inches
A4 Basic 392 15.4 410 16.1 464 18.2 483 19.0 597 23.5 653 25.7
A A4R 241 9.5 254 10.0 307 12.1 325 12.8 432 17.0 478 18.8
A4S, B, Z 392 15.4 410 16.6 484 16.2 483 19.0 597 23.5 653 25.7
A4D 429 16.9 447 17.6 500 19.7 513 20.2 632 24.9 685 27.0
B 148 5.8 162 6.3 177 6.9 181 7.1 273 10.7 292 11.5
C 164 6.2 203 8.0 251 9.9 252 9.9 311 12.2 359 14.1
H 117 4.6 117 4.6 140 5.5 159 6.2 176 7.0 222 8.8
J 98 3.9 178 7.0 251 9.9 314 12.4 314 12.4 363 14.3
K 112 4.4 112 4.4 117 4.6 124 4.9 142 5.6 157 6.2
L 122 4.8 122 4.8 135 5.3 133 5.2 122 4.8 152 6.0
M 138 5.4 138 5.4 140 5.5 150 5.9 170 6.6 190 7.7
OVERALL LENGTH DIMENSIONS WITH FLANGE
FPT & SW 3/4" 216 8.5 1-1/4" 256 10.1 1-1/2" 307 12.1
D* FOR PIPE 1" 216 8.5
1-1/2" 256 10.1 2" 307 12.1
2-1/2" 331 13.0 3" 389 15.3 4" 450 17.7
SIZES 1-1/4" 216 8.5
WN FOR 3/4" 254 10.0 1-1/4" 300 11.8 1-1/2" 364 14.3
E* FOR PIPE 1" 261 10.3
1-1/2" 304 12.0 2" 371 14.6
2-1/2" 401 15.8 3" 478 18.8 4" 571 22.5
SIZES 1-1/4" 261 10.3
ODS FOR 7/8" 239 9.4 1-3/8" 269 10.6 1-5/8" 358 14.1
2-5/8" 348 13.7 3-1/8" 414 16.3
F* TUBE 1-1/8" 239 9.4 1-5/8" 279 11.0 2-1/8" 338 13.3
4-1/8" 503 19.8
SIZES 1-3/8" 231 9.1
2-1/8" 305 12.0 2-5/8" 358 14.1 3-1/8" 389 15.3 3-5/8" 432 17.0
1-5/8" 239 9.4
H
K
L
A4D
Only
E
F
Weld Neck
Flange
ODS
Flange
B
C
D
A
(A4S,
A4B,
A4Z)
J
Add for Strainer
FPT
SW
A
(A4D)
H
A
J
Add for Strainer
C
D
FPT
SW
Add for removal of
Cover and Piston
N
B
A
B
C
D
J
Add for Strainer
H
E
F
Weld Neck
Flange
ODS
Flange
A4R
Technical Information