Contact Information:
Parker Hannifi n Corporation
Refrigerating Specialties Division
2445 South 25th. Avenue
Broadview, IL 60155-3891
phone (708) 681-6300
fax (708) 681-6306
www.parker.com
Product Bulletin 22-05 A
Outlet Pressure Regulator
Type: A4WO, A4WOB, A4WOS, A4WOBS, A4WOK,
A4WOBK, A4WOE, A4WOES
Size: 20 - 50 mm (
3
⁄
4
” to 2”)
Design Pressure Rating: 32 bar (464 psig)
Purpose:
The A4WO outlet pressure
regulators modulate the fl ow of
refrigerant gas or liquid to maintain
a constant downstream pressure.
This improved design has a higher
working pressure, greater working
temperature range than competitive
products, and minimizes the effects
of system impurities for a more
durable operation. The A4WOs most
benefi cial features are its stainless
steel and aluminum construction,
which allows it to withstand corrosive
environments and its overall light
weight minimizes installation costs.
Product Features:
Suitable for Ammonia, CO
•
2
, R-22,
R-404a, and other common
refrigerants
Designed with corrosion resistant
•
material – 304 stainless steel and
aluminum
No body wearing surfaces
•
Stainless steel components are
•
resistant to wiredrawing
Improved performance at low loads
•
with a turn down ratio of 10% of
capacity
Design drastically reduces foreign
•
material to fl ow from inlet to
diaphragm/seat and piston cavity
Light weight
•
Can be mounted in a horizontal
•
and vertical position
Several control options available
•
Fluid temperature rating: -60
•
o
C to
116
o
C (-76
o
F to 240
o
F)
Ambient temperature rating: -40
•
o
C
to 60
o
C (-40
o
F to 140
o
F)
Complies with Pressure Equipment
•
Directive 97/23/EC
A4WOB
A4WOS
A4WO
A4WOB
A4WOBS
Patent Pending
