Brochure

Parker Hannifin Corporation
Climate & Industrial Controls Group
Cleveland, OH
Catalog CIC-2003-1/US
350
Industrial Refrigeration Products: Pressure Regulators
Type A2 Compact Regulators
●
Compact, direct diaphragm operated
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Maximum rated pressure (MRP): 27.6 bar (400 PSIG)
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Flanged connections: FPT, SW, WN, ODS
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Available with close coupled strainer
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Stainless steel diaphragm
Description
The A2 type pressure regulators are compact, direct
diaphragm operated, for use with refrigerant liquid or vapor.
The regulators can be used with ammonia, R-22, R-134a,
R-404A, R-507, certain other refrigerants, oil and other
approved fluids with similar pressure, temperature and
corrosion characteristics. The regulators are for use in
systems where a small inlet or outlet pressure regulator is
needed.
Materials
Body ....................................................................... Gray iron
Seat ...............................................................Chrome plated
Diaphragm .................................. Stainless steel preformed
Specifications
Maximum Fluid Temperature ........................ 105°C (220°F)
Minimum Fluid Temperature ...........................-45°C (-50° F)
Design Pressure (MRP)....................... 27.6 bar (400 PSIG)
Application Guide
Type Function Operation Typical Applications
A2B Control inlet pressure Regulate at preset inlet pressure 1. Small capacity back pressure regulator
A2A Inlet regulator, greater capacity
Field adjustable 2. Small capacity defrost relief regulator
Open on rise in inlet pressure
Regulate at preset outlet pressure 1. Gas pressure reducing regulator
A2BO Control outlet pressure Field adjustable 2. Liquid or oil pressure reducing regulator
Open on drop in outlet pressure
Selection Guide
Ranges Available Connections Available Flow Coefficient
➂
Type Description (Std. is Bold) Style: FPT, SW, WN
Kv Cv
A2B Small Capacity Back Pressure Regulator V, A, D 0.43 0.5
A2BK➀ Relief, Give pressure setting A, D ¼",
3
⁄8", ½", ¾" 0.34 0.4
A2BP Differential Regulator for ext. connection A, D 0.43 0.5
A2BM Electrically Compensated V, A, D
A2BT Temperature Operated Regulator 1, 2 ¼",
3
⁄8", ½", ¾"
A2A Small Capacity Back Pressure Regulator A, D ¼",
3
⁄8", ½", ¾" 1.28 1.5
A2BO1➁ 0.09 0.1
A2BO2➁ Small Capacity Outlet Pressure Regulator V, D ¼",
3
⁄8", ½", ¾" 0.17 0.2
A2BO4➁ 0.43 0.5
➀ The A2BK Reseating Relief Regulator can be used for various
relief to low side applications including cold liquid line sections
where buildup of dangerous hydrostatic pressure is possible.
See “Safe Operation”.
➁ For external pressure connection, specify A2BO1E, A2BO2E or
A2BO4E.
➂ Flow coefficients are for standard range.
CAUTION:
When ordering a Type A2 regulator to be used as a pilot
regulator for an A4R, the size of the A4R main regulator
must be considered. For 20-50mm (¾" - 2") A4R, order an
A2B2 or A2BO2E. For 65-200mm (2½" - 8") A4R, order an
A2B or A2BO4E.
WARNING!
ODS flanges not suitable for use with ammonia.
!
!
Technical Information