HONGSEN TH and THW Thermostatic Expansion Valve Bodies Without Orifice
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HONGSEN TH and THW Thermostatic Expansion Valve Bodies Without Orifice
Product Description
Product Overview
HONGSEN TH and THW Series thermostatic expansion valves are designed to regulate the flow of liquid refrigerant into dry-expansion evaporators according to the refrigerant superheat.
The series features a replaceable orifice design, allowing one valve body to be matched with different orifice sizes according to the refrigerant, cooling capacity and operating conditions.
TH models use internal pressure equalization, while THW models use external pressure equalization. Valve bodies are available for R22, R134a and R404A refrigeration systems.
Important: These variants are supplied as valve bodies only. The No. 1 to No. 6 replaceable orifice assembly must be selected and ordered separately.
Key Features
- Thermostatic refrigerant flow control
- Designed for dry-expansion evaporators
- Replaceable orifice construction
- Internal or external equalization options
- Adjustable superheat setting
- Standard 1.5 m capillary tube
- SAE threaded refrigerant connections
- Models available for R22, R134a and R404A
- Different capacities available by changing the orifice
- Special capillary lengths available on request
Technical Specifications
| Item | Specification |
|---|---|
| Product Type | Thermostatic Expansion Valve Body |
| Refrigerants | R22, R134a, R404A |
| Inlet Connection | 3/8 in SAE |
| Outlet Connection | 1/2 in SAE |
| External Equalizer Connection | 1/4 in SAE on THW models |
| Superheat Adjustment Range | 2–8 K |
| Factory Static Superheat Setting | 3.5 K |
| Maximum Working Pressure | 2.0 MPa |
| Maximum Test Pressure | 3.0 MPa |
| Standard Capillary Length | 1.5 m |
| Orifice | Replaceable; sold separately |
| Available Orifice Sizes | No. 1 to No. 6 |
Refrigerant Temperature Range
| Refrigerant | Applicable Refrigerant Temperature |
|---|---|
| R22 | −40°C to +10°C |
| R134a | −30°C to +10°C |
| R404A | −40°C to +10°C |
Available Valve Body Variants
| Variant | Stock No. | Refrigerant | Equalization | Connections | Nominal Capacity Range |
|---|---|---|---|---|---|
| TH22-00 | 01.32.237 | R22 | Internal | 3/8 in × 1/2 in SAE | 0.7–4.5 TR / 2.5–15.5 kW |
| TH22W-00 | 01.32.252 | R22 | External | 3/8 in × 1/2 in × 1/4 in SAE | 0.7–4.5 TR / 2.5–15.5 kW |
| TH134-00 | 01.32.254 | R134a | Internal | 3/8 in × 1/2 in SAE | 0.5–3.0 TR / 1.8–10.5 kW |
| TH134W-00 | 01.32.253 | R134a | External | 3/8 in × 1/2 in × 1/4 in SAE | 0.5–3.0 TR / 1.8–10.5 kW |
| TH404-00 | 01.32.255 | R404A | Internal | 3/8 in × 1/2 in SAE | 0.45–2.6 TR / 1.6–9.1 kW |
| TH404W-00 | 01.32.256 | R404A | External | 3/8 in × 1/2 in × 1/4 in SAE | 0.45–2.6 TR / 1.6–9.1 kW |
Applications
- Cold rooms and freezer rooms
- Refrigerated display equipment
- Commercial refrigeration systems
- Dry-expansion evaporators
- Food storage and processing refrigeration
- Refrigeration equipment requiring adjustable superheat control
Selection Information
Before ordering, please confirm:
- Refrigerant
- Required cooling capacity
- Evaporating and condensing temperatures
- Internal or external equalization
- Required orifice number
- Connection sizes
- Required capillary length
Nominal capacities are based on the manufacturer’s published rating conditions: 5°C evaporating temperature, 35°C condensing temperature, 3.5 K superheat and 4 K liquid subcooling. Actual capacity varies with system conditions.
| Model |
TH22-00, TH22W-00, TH134-00, TH134W-00, TH404-00, TH404W-00 |
|---|