Brochure

Parker Hannifin Corporation
Climate & Industrial Controls Group
Cleveland, OH
123
Catalog CIC-2003-1/US
Service and Check Valves
Service and
Check Valves
Backseating Valves
Parker’s Backseating Valves are used as service valves
in air-conditioning and heat-pump systems. The valves
isolate sections of a system for servicing and provide a
means for charging refrigerant into a unit.
Application
• Residential split-system air conditioners and heat
pumps
Technical Information Backseating Valves
Features and Benefits
• Precision machining of the stem and valve seats,
as well as composite packing or o-ring stem
seals, translates into reliable and repeatable
sealing.
• Isolated chargeport minimizes refrigerant loss
during servicing.
• Brass body and copper connection tubes virtually
eliminate corrosion-related problems.
• Copper-sweat connections provide basic ends
for brazing and eliminate the need for flux,
simplifying the installation process.
• Multiple end configurations are available, along
with assemblies, to meet the unique needs and
flow patterns of a unit.
Valox® is a federally registered trademark of the General Electric
Company.
+
Frontseat maximum operating temperature for 1-3/8" valve body
is +210°F (+99C)
* Brass Bar per ASTM-B16, Alloy C36000.
** Due to the numerous manufacturers of refrigerant oils and
continuous changes of additives, compatibility can not be
guaranteed. Please contact Parker for compatibility of
refrigerants and refrigerant oils not listed.
PRODUCT Backseating Valves
Operating Temperature Range
+
-40° F to +250°F (-40° C to +121° C)
Operating Pressure Range Vacuum to 750 psi
Minimum Burst Pressure 3,000 psi (207 bar)
MATERIALS
Valve Body
Machined Brass* or Forged
Valve Stem Nickel-Plated Carbon Steel or 316L
Stainless Steel
Valve Stem Cap
Valox
®
Cap with Neoprene™ "W" Gasket or
Brass* Cap
Gauge Port Cap
Valox
®
Cap with Neoprene™ "W" Gasket or
Brass* Cap
VALVE STEM SEAL MATERIALS
Packing Nut Brass*
Packing Composite (Arimid, Neoprene™ and TFE)
O-Ring Neoprene™ "W"
CONNECTION TYPES AND MATERIALS
Sweat Brass* or Wrought Copper per ASTM-B75,
Alloy C12200
SAE 45° Flare Brass*
RTS Brass* or 316L Stainless Steel
Vibration Resistance Complies with UL 109
Corrosion Resistance Complies with ASTM B117
External Leak Rate < 0.1 ounce of R22 refrigerant per year at
Operating Pressure Range
MATERIAL COMPATIBILITY**
All components, including valve stem seal packaging and o-rings are
compatible with these refrigerants and refrigerant oils:
R22 & mineral oil, alkylbenzene oil or polyolester oil
R134a, R404a, R407c, R-410a or R507 & polyolester oil