The A4A outlet family of regulators include valves that control outlet pressure. Each regulator is available with an assortment of additional variations which enable one regulator to preform several functions.
The A4A outlet family of regulators are compact, heavy duty, pilot operated, and have remarkable functionality. 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 regulator. The valve’s purpose is to modulate flow of refrigerant gas or liquid to maintain constant downstream pressure as set-for, despite load fluctuations.
Markets:
• Industrial Refrigeration
• Commercial Refrigeration
Features and Benefits:
• Pilot operated characterized Modulating Plug for precise control
• Suitable for all common refrigerants and oil
• 28bar (406psig) design pressure (MRP)
• Unique modular construction
• Flanges 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
• Stainless Steel Diaphragm
• Chrome Plated Pilot Seat
• Manual Opening Stem
Application:
• Depending on the specific variation of this valve, the application may include, but is not limited to;
• Compressor Motor overload prevention, Hot Gas Bypass Capacity Control, limiting refrigerant pressure in a liquid line, deep vacuum prevention in booster suction, Pressure Rise prevention in suction main, Hot Gas Defrost Control
Type
A4A0, A4A0B, A4A0BS, A4A0E, A4A0ES, A4A0M, A4A0MS, A4A0P, A4A0PS, A4A0S, A4A0Z, A4A0EP, A4A0ESX, A4A0SX, A4W0E, A4W0ES
Minimum Working Temperature (C)
-45°C or -50°C
Minimum Working Temperature (F)
-50°F or -60°F
Maximum Working Temperature (C)
105°C
Maximum Working Temperature (F)
220°F
Maximum Pressure (bar)
27.6bar or 28bar
Maximum Pressure (psig)
400psig or 406psig
Body Material
Gray Iron, Ductlie Iron, Cast Steel
Flow Coefficient (Kv)
1.0 to 310 Kv
Flow Coefficient (Cv)
1.2 to 360 Cv
Pressure Regulator Type
Please Configure Part for Pressure Regulator Type Specification
Pressure Range (bar)
5.2 to 19.3bar or 500mm Hg to 8.3bar
Pressure Range (psig)
75 to 280psig or 20″ Hg to 120bar
Port Size (mm)
20mm to 150mm
Port Size (inch)
3/4″ to 6″
Capacity Plug
Full Capacity, 50%, 35%, 17%, N/A
Pressure Set Point (bar)
1.0 to 11.4bar
Pressure Set Point (psig)
15 to 165psig
Flange Type
FPT, ODS, Socket Weld, No Flange, Weld Neck
Connection Size
None or 3/4″ to 3-1/8″
Coil Type
Please Configure Part for Coil Type Specification
Motor Type
None, Motor Assembly- 120 V 50/60 Hz~4-20 mA Standard CAM, Motor Assembly- 24V 50/60 Hz~0-135 Ohm Standard CAM, Mounting Kit- Standard CAM, N/A
Strainer Type
With Strainer or Without Strainer
Check Valve Type
None, With CK-4, N/A
Valve Material
Standard Valve Material or Meets Pressure Equipment Directive (PED)
Plating
No Plating
