Table of Contents
Advertisement
Quick Links
ADAPTOMODE
PRESSURE REGULATORS
Types: A4AO-DN, A4AOE-DN,
A4AOS-DN and A4AOES-DN
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
• 28 bar (406 psig) design pressure (PS)
• Flanges for threaded or welded steel pipe and
copper tube (copper not for ammonia)
• Interchangeable parts
• Easy to service
• Close coupled strainers, optional
• Stainless Steel Diaphragm
• Stainless Steel Pilot Seat
• Manual Opening Stem
• Complies with Pressure Equipment Directive
97/23/EC
Description
These compact, heavy duty, pilot operated, Outlet Pressure regulators
are
suitable
for
R-502 and other common refrigerants and fluids approved for use in
refrigerant valves.
Refrigerating Specialties Division
310215
®
OUTLET
PILOT PLUG
Ammonia,
R-12,
R-22,
BULLETIN DN23-07B
Type A4AO-DN, A4AOE-DN,
A4AOS-DN, A4AOES-DN
A4AO-DN
January 2007
Installation and Service Information
All A4 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.
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 DN00-10 for strainer information.)
The fluid temperature range for the A4 Series of Regulators is -45°C to
105°C (-50°F to 220°F).
Purpose
Modulates flow of refrigerant gas or liquid to maintain a constant
downstream pressure as set-for, despite fluctuations 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 selection
assistance.
Prevent Deep Vacuum in Booster Suction: See capacity ratings
Condensed 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
flow 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-11 and
Bulletin 90-10 for ratings and application information.
1
I S O
9 0 0 1
A4AOS-DN
C E R T I F I E D
Advertisement
Table of Contents
Related Manuals for Parker ADAPTOMODE Series
Summary of Contents for Parker ADAPTOMODE Series
- Page 1 ® ADAPTOMODE OUTLET BULLETIN DN23-07B Type A4AO-DN, A4AOE-DN, PRESSURE REGULATORS A4AOS-DN, A4AOES-DN Types: A4AO-DN, A4AOE-DN, A4AOS-DN and A4AOES-DN 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 All regulators are packed for maximum protection. Unpack carefully. Check tube, which is part of the Flange Ring-tube assembly. When the force the carton to make sure all flanges and other items are unpacked.
- Page 3 the Adapter Gasket 29 carefully with the proper holes in the adapter Disassembly and Assembly and valve body and fasten adapter in place. Before assembling the Disassembly - Take care when removing Seal Caps 1 and 44 in case bonnet be sure the Adjusting Stem 6 is turned all the way out and that some 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 SERVICE POINTERS (Check General Procedure) SYMPTOM PROBABLE REASON CORRECTION Regulator does not shut off flow. Diaphragm or seat dirty, damaged or frozen. Clean or replace. Clean strainer. Diaphragm follower stuck or damaged. Clean or replace. Install follower carefully. Piston jammed with excess dirt. Remove and polish piston and bore with crocus cloth.
- Page 6 For replacement parts and prices, consult Item Description PARTS KITS LIST PRICE SCHEDULE INDUSTRIAL AND FLO-CON (PK) Seal Cap Gasket, Seal Cap Nut, Stuffing Box Packing Ring Packing Washer Adjusting Stem Fitting, Bonnet Bonnet Nameplate Screw, Name Plate Screw, Bonnet Spring Rest, Upper Spring, Range Spring Rest, Lower...
- Page 7 A4AO, A4AOE ALLOW 75mm (3") ABOVE VALVE TO OPERATE ADJUSTING STEM WELD NECK FLANGE ODS SOLDER FLANGE SUBTRACT 13mm ALLOW 25mm (1") 1/2" FOR OE BELOW VALVE TO OPERATE ADD FOR MANUAL OPENING STEM (FPT FLANGES) STRAINER (SW FLANGES) A4AOS, A4AOSE WELD NECK FLANGE ODS SOLDER...
- Page 8 Refrigerating Specialties, any other liability in connection with any of Flanges with ODS connections are not suitable for ammonia service. its products. Parker Hannifin Corporation • Refrigerating Specialties Division 2445 South 25th Avenue • Broadview, IL 60155-3891 Telephone: (708) 681-6300 • Fax (708) 681-6306...
Need help?
Do you have a question about the ADAPTOMODE Series and is the answer not in the manual?
Questions and answers