DN32 Thermostatic Valve HFT47001
The Legom HFT47001 DN32 Thermostatic Valve is a mid-size commercial thermostatic mixing valve with G1¼ internal thread connections and a white ABS silk-screen handwheel, delivering precisely temperature-controlled mixed hot water for commercial water heater installations. Sharing the same thermostatic performance as the wider HFT range — temperature adjustment range 20–60°C, control accuracy ±2°C, working pressure range 0.03–1 MPa — the HFT47001 is the standard-thread counterpart to the HFT47002 union model at the same DN32 bore and G1¼ thread size.
Manufactured from 57-3 copper with nickel plating, compatible with hot water inlet temperatures of 30–99°C and cold water inlet temperatures of 5–29°C, covering all standard domestic and commercial water heater types. Factory-preset temperature ranges are available for OEM and project orders requiring restricted operator adjustment.
Key Benefits
- G1¼ internal thread — direct pipework connection – Standard internal thread connects directly to male G1¼ fittings in the pipework without requiring separate union tail pieces, simplifying initial installation in new pipework where union fittings are not already in place
- DN32 bore for mid commercial flow demand – Provides higher flow capacity than the DN20 domestic HFT30001 models while remaining more compact than DN40 and DN50 commercial variants, suited to small-to-medium commercial hot water systems
- White handwheel for visual identification – White ABS silk-screen finish distinguishes the valve in multi-valve plant room environments and suits installations where a white or light-coloured finish is preferred
- ±2°C temperature control accuracy – Consistent mixed water delivery within ±2°C of the set point across varying supply conditions
- 20–60°C adjustment range – Full-range handwheel adjustment for commissioning flexibility, with factory-preset narrower ranges available for safety applications
- No electricity required – Self-acting thermostatic operation requiring no electrical connection or control signal
- 57-3 copper with nickel plating – Corrosion-resistant body for long-term commercial hot water service
- Wide pressure range 0.03–1 MPa – Covers gravity-fed and mains-pressure commercial systems
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | HFT47001 |
| Body Material | 57-3 copper, nickel plated |
| Handwheel | ABS white silk-screen, 40mm |
| Connection | G1¼ internal thread (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 G1¼ DN32 Pair — Thread vs Union
| Model | Connection Type | Best For |
|---|---|---|
| HFT47001 | G1¼ internal thread | New installations with accessible pipework |
| HFT47002 | G1¼ union | Confined spaces, frequent service, retrofit |
Application & Use Cases
- Small commercial and office buildings – Where hot water demand requires more than DN20 domestic capacity and G1¼ threaded connections are already specified in the pipework design
- New construction commercial installations – In new builds where pipework is being designed around the valve specifications, the simpler internal thread connection reduces fitting count and cost compared to union installations
- Schools, care homes, and small hotels – Mid-size commercial facilities requiring precise temperature control, with the preset range option available for vulnerable user environments
- Solar thermal and heat pump commercial systems – Where storage temperatures regularly exceed safe delivery limits and a G1¼ connection point is available in the existing system design
- Commercial electric and gas storage water heaters – Installed on the mixed water outlet to limit delivery temperature while maintaining high storage temperature for Legionella control
Installation Notes
- Connect hot water supply to the hot inlet (H), cold water supply to the cold inlet (C), and mixed water outlet (M) to the distribution pipework using male G1¼ fittings with appropriate thread sealant
- Install isolation valves upstream of both hot and cold inlets to enable servicing without shutting down the building water supply
- Install a strainer on the cold inlet to protect the thermostatic cartridge from grit and debris
- The valve performs optimally at 0.1–0.5 MPa — verify inlet pressure is within this range at peak flow conditions
- After installation, verify outlet temperature at the furthest fixture with a calibrated thermometer before commissioning for occupant use
- To adjust set temperature, turn the white handwheel and allow 1 minute stabilisation time before measuring outlet temperature
- If future serviceability in a confined space is anticipated, consider the HFT47002 union variant at the same G1¼ / DN32 specification
Frequently Asked Questions
When should I choose the HFT47001 over the HFT47002?
Both valves are G1¼ DN32 with identical thermostatic performance and white handwheels. The HFT47001 uses standard internal thread while the HFT47002 uses union connections. Choose the HFT47001 for new installations where pipework is being designed around the valve and accessible pipe runs make future valve removal straightforward. Choose the HFT47002 when the valve will be installed in a confined plant room, when cartridge access is anticipated regularly, or when retrofitting into existing pipework where rotating the valve body for removal is impractical.
Can the temperature range be factory-preset?
Yes. OEM and project orders can specify factory-preset ranges of 35–55°C, 40–50°C, or 30–60°C that mechanically restrict handwheel travel. Contact the Legom team to specify the required preset range when ordering.
What maintenance does the HFT47001 require?
Inspect the thermostatic cartridge annually in commercial installations. Clean the cold inlet strainer periodically. In hard water areas, descaling of the cartridge may be required annually. Full cartridge replacement should be considered every 3–5 years in continuous commercial service. Contact the Legom team for cartridge replacement specifications for the G1¼ DN32 model.
OEM & ODM Customization
Legom supports OEM and ODM services for the HFT47001 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.
