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ADAPTOMODE
PRESSURE REGULATORS
Types: A4AO, A4AOE, A4AOS and
A4AOSE
Port Size 20 - 100 mm (3/4" - 4")
FOR AMMONIA, R-12, R-22, R-502
OTHER REFRIGERANTS AND OIL
FEATURES
• Pilot operated characterized Modulating Plug
precise control
• Suitable for all common refrigerants and oil
• 27.6 bar (400 psig) design pressure (MRP)
• Flanges for threaded or welded steel pipe and
copper tube (copper not for ammonia)
• Interchangeable parts
• Easy to service
• Close coupled strainers, optional
• Many control variations are possible with the
use of a few Modules and kits. (See Adaptomode
Pressure Regulator Bul. 23-06)
• Stainless Steel Diaphragm
• Chrome Plated Pilot Seat
• Manual Opening Stem
Description
These compact, heavy duty, pilot operated, iron alloy (ASTM A126 Class
B) Outlet Pressure regulators are suitable for Ammonia, R-12, R-22,
R-502 and other common refrigerants and fl uids approved for use in
refrigerant valves. All A4 Regulators are pilot operated using upstream
Refrigerating Specialties Division
050321
®
OUTLET
PILOT PLUG
BULLETIN 23-07B
Type A4AO, A4AOE, A4AOS, A4AOSE
August 2006
Installation, Service and Parts Information
pressure for the opening force and requires a minimum 0.14 bar (2 psig)
pressure drop to fully open.
These valves are generally ordered with close coupled strainer to
prevent entrance of foreign material into the valve and the rest of the
system. (See current Bulletin 00-10 for strainer information.)
The fl uid temperature range for the A4 Series of Regulators is -45°C
to 105°C (-50°F to 220°F).
Purpose
Modulates fl ow of refrigerant gas or liquid to maintain a constant down-
stream pressure as set-for, despite fl uctuations in load. The regulator
will gradually close when downstream pressure begins to rise above the
setting and will gradually open when pressure begins to fall below the
setting. The regulator cannot maintain set-for pressure if uncontrolled
branch pipe lines feed into the main pipeline downstream of the A4AO
Regulator. Typical uses are as follows:
Protect Compressor Motor from Overload (Hold-back): See capacity
ratings in Condensed Catalog CC-11. Select at design parameters i.e.,
tons, evaporator temp./press and pressure drop.
Hot Gas Bypass Capacity Control: See Bulletin BYG-4, Condensed
Catalog CC-11.
Limit Refrigerant Pressure in a Liquid Line: Contact factory for selec-
tion assistance.
Prevent Deep Vacuum in Booster Suction: See capacity ratings Con-
densed Catalog CC-11 "Compressor Suction Loading". For selections
other than those shown, contact factory.
Prevent Pressure Rise in Suction Main: Select valve based on mass fl ow
requirements. Valve Cv and pressure drop across regulator. Contact
factory for proper selection assistance, if required.
Hot Gas Defrost Control: Refer to Condensed Catalog CC-1 1 and
Bulletin 90-10 for ratings and application information.
1
I S O
9 0 0 0 - 2 0 0 0 C E R T I F I E D
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Related Manuals for Parker ADAPTOMODE A4AO
Summary of Contents for Parker ADAPTOMODE A4AO
- Page 1 ADAPTOMODE ® OUTLET BULLETIN 23-07B Type A4AO, A4AOE, A4AOS, A4AOSE PRESSURE REGULATORS Types: A4AO, A4AOE, A4AOS and A4AOSE Port Size 20 - 100 mm (3/4” - 4”) FOR AMMONIA, R-12, R-22, R-502 OTHER REFRIGERANTS AND OIL FEATURES • Pilot operated characterized Modulating Plug precise control •...
- Page 2 Principles of Operation (See Fig. 1 & 1A) Installation The outlet pressure is sensed under the diaphragm through the sensing tube, All regulators are packed for maximum protection. Unpack carefully. Check which is part of the Flange Ring-tube assembly. When the force created by the carton to make sure all flanges and other items are unpacked.
- Page 3 Disassembly and Assembly adapter in place. Before assembling the bonnet be sure the Adjusting Stem (continued) 6 is turned all the way out and that the Bonnet 8 and Diaphragm Follower 15 Disassembly - Take care when removing Seal Caps 1 and 44 in case some are properly aligned, otherwise damage to the diaphragm and pilot seat may refrigerant may be trapped inside.
- Page 4 Disassembly and Assembly (continued) Modudapter (See Figs. 1, 2 and 3) The Modudapter 28 will accommodate the Modular Pilot Solenoid and Moduplate. When assembling make sure the Modudapter gauge port is directly lined up with the inlet of the regulator. Passage N must communicate upstream pressure through the hole in the Adapter Gasket 29 as well as into Modudapter 28 and thence to the pilot modules.
- Page 5 Maintenance and Service (continued) Electrical The Refrigerating Specialties Division molded water resistance Class “B” coil is designed to operate with line voltage from 85% to 110% of rated solenoid coil is designed for long life and powerful opening force. The coil voltage.
- Page 6 Repair Kits for A4AO, A4AOE, A4AOS and A4AOSE 20mm (3/4”) 25mm (1”) Item No. Description Kit No. Kit No. Seal Cap Only Avail. with Kit Only Avail. with Kit Seal Cap Gasket Only Avail. with Kit Only Avail. with Kit Cap Kit, Seal 202110 202110...
- Page 7 Repair Kits for A4AO, A4AOE, A4AOS and A4AOSE 32mm (1-1/4”) 40mm (1-5/8”) 50mm (2”) 65mm (2-1/2”) 75mm (3”) 100mm (4”) Item No. Kit No. Kit No. Kit No. Kit No. Kit No. Kit No. Only Avail. with Kit Only Avail. with Kit Only Avail.
- Page 8 Repair Kits for A4AO, A4AOE, A4AOS and A4AOSE 20mm (3/4”) 25mm (1”) Item No. Description Kit No. Kit No. Plug/Stem Assembly Only Avail. with Kit Only Avail. with Kit Washer, Flat Only Avail. with Kit Only Avail. with Kit Packing, Stem Only Avail.
- Page 9 Repair Kits for A4AO, A4AOE, A4AOS and A4AOSE 32mm (1-1/4”) 40mm (1-5/8”) 50mm (2”) 65mm (2-1/2”) 75mm (3”) 100mm (4”) Item No. Kit No. Kit No. Kit No. Kit No. Kit No. Kit No. Only Avail. with Kit Only Avail. with Kit Only Avail.
- Page 10 Repair Kits for A4AO, A4AOE, A4AOS and A4AOSE 20mm (3/4”) 25mm (1”) Item No. Description Kit No. Kit No. Flange Bolt Package includes bolts and nuts; no gaskets 50,52-54 Moduplate Kit “MP” 200518 200518 Moduplate Only Avail. with Kit Only Avail. with Kit O-Ring, “B”...
- Page 11 Repair Kits for A4AO, A4AOE, A4AOS and A4AOSE 32mm (1-1/4”) 40mm (1-5/8”) 50mm (2”) 65mm (2-1/2”) 75mm (3”) 100mm (4”) Flange Bolt Package includes bolts and nuts; no gaskets (cont’d from page 9) Item No. Kit No. Kit No. Kit No. Kit No.
- Page 12 Flanges with ODS connections are not suitable for ammonia service. Parker Hannifin Corporation • Refrigerating Specialties Division 2445 South 25th Avenue • Broadview, IL 60155-3891 Telephone: (708) 681-6300 • Fax (708) 681-6306...
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