Brochure

Parker Hannifin Corporation
Climate & Industrial Controls Group
Cleveland, OH
Flo-Con Pressure Regulators and Valves
300
Catalog CIC-2003-1/US
A9 Pressure Regulators
Features and Benefits
• Pilot operated for precise control of set point.
• External or internal equalizer.
• Available with integral electric shut-off.
• Sweat-in place without disassembly.
• Molded class H coil construction.
• DIN coil assemblies available.
Specifications
• Two pressure ranges:
Range A = 10" Hg vacuum to 120 psig
(250 mm hg to 8.3 bar)
(hot gas bypass range).
Range B = 80 psig to 220 psig (5.6 to 15.2 bar)
(typical application - receiver pressure regulator).
• Minimum fluid temperature: -40° F (-40° C).
• Design pressure (M.R.P.): 450 psig (31.0 bar)
• All models UL listed, file # SA5473.
• CSA certified A9S & A9SE, file # LR20991-14.
A9 Port/Connection Size Combinations
A9 Valve Nomenclature
Technical Information A9 Pressure Regulators
Description: The A9 family of pilot operated outlet
pressure regulators are ductile iron bodied valves with
brazed copper couplings. The A9 is “internally equal-
ized” to outlet pressure by means of a small channel or
passage drilled through the outlet of the adapter which
effectively communicates downstream pressure to the
pilot section of the valve. The regulator therefore reacts
to and controls the immediate outlet pressure of the
control valve. When used as a receiver pressure regula-
tor, range “B” should be designated when ordering.
The A9E is an “externally equalized” outlet pressure
regulator and is usually applied as a hot gas bypass
regulator. For those applications where the discharge
gas is introduced into the inlet of the evaporator, an
A9E is typically used with a small pilot line connected
Valve
Family
A9
Integral Solenoid/
Electric Shut-Off
S
Externally
Equalized
E
Port Size
in Inches
5/8"
Connection Size
in Inches
7/8"
from the compressor suction to the external fitting on
the regulator. Installed in this manner the valve senses
and responds to compressor suction pressure while
piped to feed discharge gas to the inlet of the evapora-
tor. Since it is the suction pressure that the regulator is
responding to and ultimately controlling, a range “A”
regulator should be designated when ordering an A9E
or A9SE for this application.
Installation: A9 regulators can be mounted either in a
vertical or horizontal line with the refrigerant flow in the di-
rection of the arrow on the body. These regulators may be
soldered into the line without disassembly. A wet cloth
should be wrapped around the valve and the soldering
flame should be directed away from the valve body.
Adjustment: Loosen the adjusting stem seal nut and
turn the adjusting stem clockwise to raise the set point
of the regulator. Turn the adjusting stem counter clock-
wise (into the bonnet) compresses the range spring and
subsequently raises the valve's set point. Conversely,
turning the adjusting stem counterclockwise will de-
crease the valve's set point. For a range “A” valve, one
complete turn of the adjusting stem will result in a
change in set point of about 16 psi (1.1 bar). One com-
plete turn of the adjusting stem on a range “B” regulator
will change the set point approximately 25psi (1.7 bar).
The set point adjustment of an A9S or A9SE must be
made with the pilot solenoid energized.
Electrical: A9S and A9SE regulators utilize a molded
water resistant Class “H” solenoid coil with a general
purpose coil housing which meets NEMA 3R and 4
requirements. A class “H” DIN coil is also available with
certain voltages. Power consumption during normal
operation will be 11 watts or less. The coils are designed
to operate with a line voltage from 85% to 110% of rated
coil voltage. Operating with a line voltage above or be-
low these limits may result in coil burn out.
Ordering Guide: Specify valve type, range, port and
connection size. If shut off (“S”) variation is included,
specify voltage and frequency.
Standard Voltages
• 120V/60Hz, 110V/50Hz
• 240V/60Hz, 220V/50Hz
• 208V/60Hz
• 240V/60Hz, 220V/50Hz
(DIN)
• 240V/50Hz (DIN)
Port Size Available Connection Sizes
3/8” (9mm) 5/8”, 7/8” , 1-1/8” (15mm, 22mm, 28mm)
5/8” (15mm) 5/8”, 7/8” , 1-1/8” (15mm, 22mm, 28mm)
7/8” (22mm) 5/8", 7/8”, 1-1/8” (15mm, 22mm, 28mm)
1-1/8” (28mm) 1-1/8” (28mm)
A9 Outlet Pressure Regulator
A9S
Outlet Pressure Regulator
with Electric Shut-Off Feature
A9E Externally Equalized Outlet Pressure Regulator
A9SE
Externally Equalized Outlet Pressure Regulator
with Electric Shut-Off Feature