Sanhua Thermostatic Expansion Valve (RFGD)

Thermostatic Expansion Valve Series RFGD

RFGD series thermostatic expansion valves are used to adjust the mass flow of refrigerant into the
evaporator while controlling the refrigerant superheat at the outlet of the evaporator. They can be used
for various refrigerants under all working conditions. Typical applications are refrigerations systems
like commercial refrigerators and freezers, icemakers, dehumidifiers as well as air conditioners at
various evaporation temperatures.

Features

 Compact design with built-in orifice
 Warm thermo head construction
 All connections pipes are completely in copper
 Valves with MOP function can be provided to assure reliable compressor operation
 Applicable to a wide evaporation temperature range
 Reliable and consistent performance of superheat control
 Balanced Port - suitable for reversible cycles
 Thermal bulb utilizes cross charge technology, providing consistent superheat degree over 
  the whole evaporation temperature range

General Specification

 Applicable for all common HCFC and HFC refrigerants such as : R22, R134a, R404A, R407C,
  R410A, R507
 Ambient temperature min./max. : -35^oC/+55^oC
 Medium temperature TS min./max. : -40^oC/+70^oC -60^oC/+70^oC
 Maximum operating pressure PS: 2,1 ... 4,5 Mpa (21...45 bar) 
 Maximum operating pressure is related to the used refrigerant
 Installation position: - Preferably valve head upwards
 Main flow direction from inlet A to outlet B
 Certifications: UL/CSA and PED declaration

Technical parameters

 RFGD valves are available in a straight shape with adjustable superheat on site
 RFGD valves are available with the following solder connections
 Metric:    Inlet 10mm ODF/ Outlet 16mm ODF    or
        Inlet 12mm ODF/ Outlet 22mm ODF    or
Inlet 16mm ODF/ Outlet 22mm ODF
 Imperial:      Inlet 3/8” ODF/ Outlet 5/8” ODF or
        Inlet 1/2” ODF/ Outlet 7/8” ODF or
Inlet 5/8” ODF/ Outlet 7/8” ODF
 RFGD valves are available with 3 different temperature ranges:
 from -40°C to +10°C
 from -40°C to -5°C
 from -60°C to -25°C
 Equalization port available as an option:  
 Metric:    6mm ODF    (available for models with metric solder connections)
 Imperial:      1/4” ODF    (available for models with imperial solder connections)
 Capillary tube length 1500mm as standard. Different length customizable on request.
 Standard MOP values:
 T. range -40°C to +10°C:    MOP: +15°C or MOP not present
 T. range -40°C to -5°C:     MOP: 0°C
 T. range -60°C to -25°C:    MOP: -20°C

                       

Thermostatic Expansion Valve Catalogue
Thermostatic Expansion Valve Instruction