DN32 Thermostatic Valve HFT47002
The Legom HFT47002 DN32 Thermostatic Valve is a mid-size commercial thermostatic mixing valve featuring G1¼ union connections and a white ABS silk-screen handwheel, combining the easy-service advantage of union fittings with DN32 flow capacity for commercial water heater installations. Like the HFT65002, the union connection design allows the valve body to be disconnected and reconnected without rotating it in the pipework — making cartridge inspection and replacement significantly faster in confined plant room environments.
Manufactured from 57-3 copper with nickel plating, the HFT47002 delivers the same thermostatic mixing performance as the wider HFT range: temperature adjustment range 20–60°C, control accuracy ±2°C, working pressure range 0.03–1 MPa, hot water inlet 30–99°C, cold water inlet 5–29°C. Factory-preset temperature ranges are available for OEM and project orders requiring restricted operator adjustment.
Key Benefits
- G1¼ union connections for fast service access – Union fittings allow the valve body to be disconnected and reconnected without rotating it or disturbing surrounding pipework, reducing plumber time on site for cartridge inspection and replacement
- DN32 flow capacity for mid commercial demand – Sized between the domestic DN20 HFT30001 and the larger DN40 commercial models, matching systems where hot water demand requires more than DN20 can provide without necessitating DN40 bore
- White handwheel for visual differentiation – White ABS silk-screen finish distinguishes the HFT47002 from black-handwheel models in multi-valve installations and coordinates with light-coloured plant room environments
- ±2°C temperature control accuracy – Consistent mixed water delivery within ±2°C of the set point across varying supply pressure and temperature conditions
- 20–60°C adjustment range – Full-range commissioning flexibility with factory-preset narrower ranges available for safety-restricted applications
- No electricity required – Self-acting thermostatic operation with no electrical connection needed at the valve
- 57-3 copper with nickel plating – Corrosion-resistant body construction for continuous commercial hot water service
- Wide pressure range 0.03–1 MPa – Covers gravity-fed low-pressure systems through standard mains pressure
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | HFT47002 |
| Body Material | 57-3 copper, nickel plated |
| Handwheel | ABS white silk-screen, 40mm |
| Connection | G1¼ union (DN32) |
| Temperature Adjustment Range | 20–60°C (standard); 35–55°C / 40–50°C / 30–60°C (preset options) |
| Temperature Control Accuracy | ± 2°C |
| Working Pressure Range | 0.03 MPa – 1 MPa |
| Ideal Working Pressure | 0.1 MPa – 0.5 MPa |
| Cold Water Temperature Range | 5°C – 29°C |
| Hot Water Temperature Range | 30°C – 99°C |
| Primary Use | Commercial water heater systems |
HFT DN32 Models — Comparison
| Model | Connection | Thread | Handwheel | Service Ease |
|---|---|---|---|---|
| HFT65001 | Internal thread | G1½ | White | Standard — rotate valve to remove |
| HFT47002 | Union | G1¼ | White | Fast — loosen union nuts only |
Application & Use Cases
- Commercial installations requiring regular cartridge maintenance – The union connection is particularly valuable where cartridge inspection is expected annually or more frequently — in hard water areas, high-usage facilities, or systems serving vulnerable users where TMV performance must be verified regularly
- Confined plant rooms and utility spaces – Where surrounding pipework makes rotating a valve body for removal difficult, union connections allow the HFT47002 to be disconnected and serviced without touching adjacent pipe runs
- Schools, care homes, and healthcare facilities – Mid-size commercial facilities requiring precise temperature control with restricted adjustment, where the serviceability of union connections reduces maintenance downtime and cost
- Retrofit TMV installations – Replacing an existing valve in an established pipework layout is significantly easier with union connections, as the new valve does not need to be threaded into the pipework — only the union nuts need tightening
- Solar thermal and heat pump commercial systems – Installations where storage temperatures are high and regular verification of TMV performance is a maintenance requirement benefit from the fast access that union connections provide
Installation Notes
- Install the union tail pieces onto the hot (H), cold (C), and mixed (M) pipe ends first using appropriate thread sealant. Once fixed, the valve body connects and disconnects by tightening or loosening the union nuts — no rotation of the valve body required
- Ensure union sealing washers or O-rings are correctly seated before tightening. Hand-tight plus a quarter turn is typically sufficient for a leak-free union joint
- Install isolation valves upstream of both hot and cold inlets to allow valve disconnection without draining the system
- Install a strainer on the cold inlet to protect the thermostatic cartridge from debris
- The valve performs optimally at 0.1–0.5 MPa — verify inlet pressure is within this range at peak flow
- After installation, verify mixed outlet temperature at the furthest fixture with a calibrated thermometer before commissioning
Frequently Asked Questions
How does the HFT47002 compare to the HFT65001?
Both are DN32 thermostatic valves with white handwheels and identical thermostatic performance. The key difference is the connection type: the HFT65001 uses G1½ internal thread requiring the valve to be rotated for removal, while the HFT47002 uses G1¼ union connections allowing the valve body to be disconnected by loosening union nuts alone. Choose the HFT47002 when serviceability is a priority — in confined spaces, high-maintenance environments, or retrofit installations. Choose the HFT65001 when existing pipework has G1½ male threaded connections and ease of removal is not a primary concern.
Can the temperature range be factory-preset?
Yes. OEM and project orders can specify a factory-preset temperature range of 35–55°C, 40–50°C, or 30–60°C to mechanically restrict handwheel travel. This is commonly required in healthcare, aged care, and education facilities. Contact the Legom team to specify the required preset range when ordering.
What maintenance does the HFT47002 require?
Inspect the thermostatic cartridge annually. The union connections make this process straightforward — loosen the union nuts, remove the valve body, and the cartridge is accessible for inspection or replacement without disturbing the surrounding pipework. Clean the cold inlet strainer periodically. Contact the Legom team for cartridge replacement specifications for the G1¼ DN32 model.
OEM & ODM Customization
Legom supports OEM and ODM services for the HFT47002 DN32 Thermostatic Valve. Customization options include preset temperature range, connection size, body finish, and handwheel color. Contact us via WhatsApp or info@legomsmart.com.
Product information last reviewed by the Legom Technical Team. For the most current specifications, refer to the official datasheet or contact our sales team.
Custom OEM & ODM Solutions
Legom is a direct manufacturer offering end-to-end OEM and ODM services. With our in-house engineering and production capabilities, we work closely with distributors and system integrators to deliver fully customized solutions under strict NDA.
