Brochure

Catalog CIC-2003-1/US
Refrigeration Solenoid Valves
Parker Hannifin Corporation
Climate & Industrial Controls Group
Cleveland, OH
255
Refrigeration
Solenoid Valves
Design Terminology, Identification and Agency Approvals Technical Information
Design Terminology
Continuous Duty – A rating given to a valve that can
be energized continuously without overheating.
Correction Factor – A mathematical relationship re-
lated to a fluids specific gravity used to convert specific
flows from a standard media to the media in question.
Current drain – The amount of current (expressed in
amperes) that flows through the coil of a solenoid valve
when it is energized.
Cv Factor – A mathematical factor that represents the
quantity of water, in gallons per minute, that will pass
through a valve with a 1 psi pressure drop across the valve.
Flow – Movement of fluid created by a pressure differential.
Flow Capacity – the quantity of fluid that will pass
through a valve under a given set of temperature and
pressure conditions.
Manual Stem – A mechanical device that permits the
manual opening or closing of a valve in the case of
emergency or power failure. A manual stem is available
on all normally closed valves.
Maximum Operating Pressure Differential (MOPD) –
The maximum pressure difference between the inlet
and outlet pressures of the valve must not be ex-
ceeded, allowing the solenoid to operate in both the
energized and de-energized positions.
Minimum Operating Pressure Differential – The
minimum pressure difference between the inlet and
outlet pressures required for proper operation. This
minimum operating pressure differential must be main-
tained throughout the operating cycle of pilot operated
valves to assure proper shifting from the closed posi-
tion to the open position and visa versa. In the absence
of the minimum operating pressure, the valve may
close or will not fully open.
Orifice – The main opening through which fluid flows.
Safe Working Pressure – The maximum pressure a
valve may be exposed to without experiencing any
damage. The valve does not have to be operable at this
pressure, but merely withstand the pressure without
damage.
Identification
Valve Identification
All Parker valves are identified with a valve nameplate.
The nameplate indicates the valve type and size, maxi-
mum operating pressure differential (MOPD) and safe
working pressure (SWP). In addition, the nameplate
also specifies the appropriate electrical specifications
for agency compliance.
Example (shown at right):
R20E84 ......................................... Valve Number
MOPD...................................Maximum Operating
Pressure Differential (psi)
SWP ........................ Safe Working Pressure (psi)
Agency
Requirement ....................... Assembly consists of
“R” body and “R” Coil
Coil Identification
All Parker coil enclosures are identified with a label.
The label indicates the coil part number, voltage and
frequency.
Example (shown below):
RK1U3 ..................... Coil Enclosure Part Number
208 / 60 ............................... Voltage & Frequency
and ............................... Agency Approved
Agency Approvals
The Parker Refrigeration Valves are approved by
Underwriter’s Laboratories (UL) and certified by the
Canadian Standards Association (CSA). Agency
approval is specified based on assembly of an
approved valve and coil enclosure assembly.
UL File Number: MH15507
CSA File Number: LR64702 legacy file
Valve Identification Coil Identification
ASTM
Designation
Commercial Designations
and/or Trade Names
PTFE Rulon
®
AR
R Series Seal Material Designations
Rulon
®
AR is a Furon-Advanced Polymers
Division trademark.