Parker SC Series Service Bulletin

Service Bulletin 33-00C
SOLENOID Valve -- Type SC
Port Size 9 - 66mm (3/8" - 2-5/8")
For , R12, R22, R502 and other common refrigerants
FEATURES
• Pilot Operated
• Interchangeable Capacity Cartridges Same
as Used on (S)PORT EPR's
• Low Pressure Drop
• Manual Opening Stem
• All Service from the Top
• Sweat-in-place Without Disassembly
• Maximum Opening Pressure Difference
(MOPD): 20.7 bar (300 psig)
• Design Pressure (MRP): 31.0 bar (450 psig)
• Molded Class "F" Coil Construction
•
Pilot Light Available
DESCRIPTION
The new SC suction solenoid for commercial applications
was developed by the Refrigerating Specialties Division
of Parker Hannifin as an alternative low pressure drop
shut off valve in a wide range of both port and connection
sizes. With cartridge (port) sizes available as large as 2-
5/8", SC solenoids are capable of handling greater flow
rates than other commercially available valves for suction
applications in a non-flanged design. In addition, this
unique design incorporates the same concept of cartridge
interchangeability as found in Parker's popular (S)PORT
evaporator pressure regulators.
This innovative design actually utilizes the same capacity
cartridges (and valve bodies) as those used with the
(S)PORT regulator series, as well as the same solenoid
actuator, solenoid coil, and splice box coil housing.
Capacity cartridges can be changed by simply unscrewing
the valves' four bonnet bolts in order to remove the
adapter and cartridge assemblies. With this flexible line
of solenoid valves now supplementing the existing line of
050414
Figure 1
August 2005 Installation, Service and Parts Information
(S)PORT regulators having these same characteristics, a
single reliable source for all suction line components is
now available This ductile iron-bodied solenoid valve with
.
brazed copper couplings is suitable for most common
refrigerants, certain oils and other fluids approved for use
in refrigeration. This valve may be opened by means of a
manual opening stem for servicing or in case of electrical
power failure. These solenoids are an integrated assembly
of (3) three modules: 1) A body containing no moving
parts; 2) A capacity cartridge, which contains both piston
and modulating plug, and 3) an adapter on which the pilot
solenoid is mounted and which incorporates a manual
opening stem which bypasses the pilot pressure around
the solenoid and directs it to the top of the valve piston.
ORDERING GUIDE
Parker's SC solenoid series can be ordered using the
same numbering system which is used with (S)PORT
pressure regulators. The first two digits following the
"SC" valve type designate the valve's port size in eighths
of an inch, while the second two digits designate the
connection also in eighths of an inch. For example, an
size,
SC-07-09 would call for a 7/8" Port (or cartridge) size and
a 1-1/8" ODS connection. Both (S)PORT regulators and SC
solenoids are frequently ordered less coil and coil housing
for inventory purposes. Should a solenoid coil be desired
however, please indicate the voltage requirement when
ordering.
PRINCIPLES OF OPERATION
The R/S Type SC is a pilot operated solenoid. The valve
in its closed position, with the solenoid coil de-energized
and the plunger and piston plug in the seated position, is
shown in Figure 1. Electrical energizing of the solenoid
coil forms a magnetic field, pulling up the plunger, lifting
it off its seat. Upward motion of the plunger permits
entrance of the fluid from the valve inlet
ISO 9001-2000 CERTIFIED