Description
The Sanhua RFKH Series Thermostatic Expansion Valves regulate refrigerant flow into the evaporator while controlling refrigerant superheat at the evaporator outlet. They are designed for refrigeration and air conditioning applications, including freezers, ice makers, dehumidifiers and heat pumps.
The series features replaceable valve orifices, stainless steel sensing bulbs and capillary tubes, and a choice of internal or external pressure equalisation. Different models are available for specific refrigerants and evaporating temperature requirements.
WHAT IS THIS PRODUCT USED FOR?
The Sanhua RFKH Series Thermostatic Expansion Valves are used to meter refrigerant entering an evaporator and maintain the required superheat. They help refrigeration and air conditioning systems control refrigerant flow as operating conditions change.
FEATURES
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Thermostatic refrigerant flow control with superheat regulation
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Replaceable valve orifice for capacity selection and servicing
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Stainless steel sensing bulb and capillary tube
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Cross-charge sensing bulb technology for consistent superheat control
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Internal and external pressure equalisation options
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3/8″ flare inlet with different outlet connection configurations
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1.5 m capillary tube
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Available for different refrigerants and evaporation temperature ranges
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MOP (Maximum Operating Pressure) options available on selected models
OPTIONS
RFKH01 Series – R22
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SAN-RFKH01-6.0-22 – Internal Equalisation, 1/2″ Flare Outlet
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SAN-RFKH01E-6.0-08 – External Equalisation, 1/2″ Solder Outlet
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SAN-RFKH01E-6.0-13 – External Equalisation, 1/2″ Flare Outlet
RFKH03 Series – R404A / R507A
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SAN-RFKH03-4.8-09 – Internal Equalisation, 1/2″ Solder Outlet
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SAN-RFKH03-4.8-21 – Internal Equalisation, 1/2″ Flare Outlet
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SAN-RFKH03-4.8-215 – Internal Equalisation, 1/2″ Solder Outlet, MOP +15°C
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SAN-RFKH03E-4.8-10 – External Equalisation, 1/2″ Solder Outlet
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SAN-RFKH03E-4.8-15 – External Equalisation, 1/2″ Flare Outlet
RFKH04 Series – R134a
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SAN-RFKH04-2.9-30 – Internal Equalisation, 1/2″ Solder Outlet
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SAN-RFKH04E-2.9-19 – External Equalisation, 1/2″ Flare Outlet
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SAN-RFKH04E-2.9-224 – External Equalisation, 1/2″ Solder Outlet, MOP +15°C
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SAN-RFKH04E-2.9-31 – External Equalisation, 1/2″ Solder Outlet
RFKH07 Series – R407A / R407F
- SAN-RFKH07E-6.0-46 – External Equalisation, 1/2″ Solder Outlet
RFKH08 Series – R448A / R449A
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SAN-RFKH08-6.1-49 – Internal Equalisation, 1/2″ Flare Outlet
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SAN-RFKH08E-6.1-48 – External Equalisation, 1/2″ Flare Outlet
Additional SKUs – Product Type Requires Verification
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SAN-RFKH-023-02
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SAN-RFKH-023-03
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SAN-RFKH-023-04
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SAN-RFKH-023-0X
SPECIFICATIONS
| SKU | Refrigerant | Equalisation | Outlet Connection | MOP |
|---|---|---|---|---|
| SAN-RFKH01-6.0-22 | R22 | Internal | 1/2″ Flare | No |
| SAN-RFKH01E-6.0-08 | R22 | External | 1/2″ Solder | No |
| SAN-RFKH01E-6.0-13 | R22 | External | 1/2″ Flare | No |
| SAN-RFKH03-4.8-09 | R404A / R507A | Internal | 1/2″ Solder | No |
| SAN-RFKH03-4.8-21 | R404A / R507A | Internal | 1/2″ Flare | No |
| SAN-RFKH03-4.8-215 | R404A / R507A | Internal | 1/2″ Solder | +15°C |
| SAN-RFKH03E-4.8-10 | R404A / R507A | External | 1/2″ Solder | No |
| SAN-RFKH03E-4.8-15 | R404A / R507A | External | 1/2″ Flare | No |
| SAN-RFKH04-2.9-30 | R134a | Internal | 1/2″ Solder | No |
| SAN-RFKH04E-2.9-19 | R134a | External | 1/2″ Flare | No |
| SAN-RFKH04E-2.9-224 | R134a | External | 1/2″ Solder | +15°C |
| SAN-RFKH04E-2.9-31 | R134a | External | 1/2″ Solder | No |
| SAN-RFKH07E-6.0-46 | R407A / R407F | External | 1/2″ Solder | No |
| SAN-RFKH08-6.1-49 | R448A / R449A | Internal | 1/2″ Flare | No |
| SAN-RFKH08E-6.1-48 | R448A / R449A | External | 1/2″ Flare | No |
| SAN-RFKH-023-02 | Verify | Verify | Verify | Verify |
| SAN-RFKH-023-03 | Verify | Verify | Verify | Verify |
| SAN-RFKH-023-04 | Verify | Verify | Verify | Verify |
| SAN-RFKH-023-0X | Verify | Verify | Verify | Verify |
GENERAL TECHNICAL SPECIFICATIONS
| Specification | Details |
|---|---|
| Brand | Sanhua |
| Series | RFKH |
| Product Type | Thermostatic Expansion Valve |
| Valve Design | Angle-Shaped |
| Inlet Connection | 3/8″ Flare |
| Outlet Connection | 1/2″ Flare or Solder, depending on model |
| Pressure Equalisation | Internal or External |
| External Equalisation Connection | 1/4″ Flare or 6 mm Solder, depending on model |
| Capillary Tube Length | 1.5 m |
| Maximum Working Pressure | 4.6 MPa (46 bar) |
| Ambient Temperature | −35°C to +55°C |
| Medium Temperature | −40°C to +70°C (standard models) |
| Replaceable Orifice | Yes |
| Applications | Refrigeration, Air Conditioning and Heat Pumps |
**Limited Returns – Electrical & Electronic Components**
Electrical and electronic components are eligible for return only if they have not been on-sold, installed, or used, and remain in their original, saleable condition.
All returns are subject to the customer’s existing trading agreement and standard returns terms.
Faulty or incorrectly supplied products remain covered by applicable manufacturer warranties and statutory rights.
