DN32 Thermostatic Valve HFT65001
The Legom HFT65001 DN32 Thermostatic Valve is a mid-size commercial thermostatic mixing valve with G1½ internal thread connections, delivering precisely temperature-controlled mixed hot water for commercial water heater installations. Positioned between the domestic HFT30001 series and the larger DN40/DN50 commercial models, the HFT65001 suits commercial applications with moderate hot water demand — offices, small hotels, schools, and care facilities — where DN20 flow capacity is insufficient but the full DN40 or DN50 bore is not required.
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 HFT65001 is distinguished by its white ABS silk-screen handwheel, providing a clean, neutral aesthetic suited to visible plant room installations. Manufactured from 57-3 copper with nickel plating, compatible with hot water inlet temperatures of 30–99°C covering all standard water heater types.
Key Benefits
- DN32 bore for mid-range commercial flow – Sized between the DN20 domestic models and the DN40/DN50 commercial range, the HFT65001 serves commercial systems where hot water demand exceeds what DN20 can provide without requiring the larger valve body of the DN40 or DN50 variants
- White handwheel for clean installation aesthetic – The white ABS silk-screen handwheel provides a neutral appearance suited to visible installations in plant rooms, utility spaces, and locations where a white finish coordinates better with surrounding equipment
- Temperature control accuracy of ±2°C – Consistent mixed water delivery within ±2°C of the set point regardless of supply pressure and temperature fluctuations
- 20–60°C adjustment range – Full-range handwheel adjustment for commissioning flexibility, with factory-preset narrower ranges available for safety-restricted applications
- No electricity required – Self-acting thermostatic operation requiring no electrical connection or control signal
- 57-3 copper body with nickel plating – Corrosion-resistant construction for long-term service in continuous commercial hot water applications
- Wide pressure range of 0.03–1 MPa – Suitable from low-pressure gravity-fed commercial systems through standard mains pressure
- Compatible with all commercial water heater types – 30–99°C hot inlet range covers electric, gas, solar thermal, and heat pump commercial systems
- Customizable preset temperature ranges – OEM orders can specify factory-preset ranges for restricted-adjustment applications
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | HFT65001 |
| Body Material | 57-3 copper, nickel plated |
| Handwheel | ABS white silk-screen, 40mm |
| Connection | G1½ 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 Series — Full Range Overview
| Model | Connection | Bore | Handwheel | Typical Use |
|---|---|---|---|---|
| HFT30001 | G1/2 internal | DN15 | Black | Small domestic / single fixture |
| HFT30001 | G3/4 internal | DN20 | Black silk-screen | Standard domestic heater |
| HFT65001 | G1½ internal | DN32 | White silk-screen | Mid commercial |
| HFT65002 | G1½ union | DN40 | Black silk-screen | Commercial — easy service |
| HFT70001 | G2 internal | DN40 | Black silk-screen | Mid-large commercial |
| HFT70002 | G2 internal | DN50 | Black silk-screen | Large commercial / industrial |
Application & Use Cases
- Small commercial buildings and offices – Office buildings, small hotels, and retail premises where hot water demand exceeds residential scale but does not require the DN40 or DN50 bore of the larger commercial models
- Schools and education facilities – Delivering safe mixed water temperature to staff and student washrooms across a facility where simultaneous demand from multiple outlets requires more flow than DN20 can provide without excessive pressure drop
- Care homes and supported accommodation – Where precise temperature control and restricted adjustment are required for vulnerable residents, with the preset range option limiting operator adjustment to the safe delivery range
- Commercial solar thermal systems – Mid-size solar thermal installations in guesthouses, bed and breakfasts, and small apartment blocks where storage temperature regularly exceeds safe delivery limits
- Gym and sports facility changing rooms – Shower facilities with moderate simultaneous demand requiring more flow capacity than domestic TMVs can deliver
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
- G1½ internal thread connections require male G1½ fittings. Use appropriate thread sealant on all connections
- Install isolation valves on both hot and cold inlets upstream of the HFT65001 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 using a calibrated thermometer before commissioning for occupant use
- To adjust the set temperature, turn the white handwheel — allow the system to stabilise for at least 1 minute after each adjustment before measuring outlet temperature
Frequently Asked Questions
How does the HFT65001 differ from the HFT65002?
Both valves share G1½ thread size and identical thermostatic performance specifications. The key differences are bore size and connection type. The HFT65001 is DN32 with standard internal thread, while the HFT65002 is DN40 with union connections. The HFT65001’s DN32 bore provides lower flow capacity than the HFT65002’s DN40, making it better suited to smaller commercial systems with moderate flow demand. The HFT65002’s union connections make future cartridge service easier in confined spaces. Choose HFT65001 when DN32 flow capacity matches the system demand. Choose HFT65002 when higher DN40 flow is needed or when easy serviceability is a priority.
Why does this model have a white handwheel when all other HFT models are black?
The white handwheel provides a visual differentiation that can be useful in multi-valve plant room installations where different valve functions need to be quickly identified, or simply where the installation environment and surrounding equipment have a white or light-coloured finish that the white handwheel coordinates with better than black. All other performance characteristics are identical regardless of handwheel colour.
Can the temperature range be factory-preset for safety applications?
Yes. OEM and project orders can specify a factory-preset range of 35–55°C, 40–50°C, or 30–60°C that mechanically limits handwheel travel, preventing users from setting the outlet above the preset maximum. Contact the Legom team to specify the required preset range when ordering.
What maintenance does the HFT65001 require?
Inspect the thermostatic cartridge annually in commercial installations. Clean the cold inlet strainer periodically depending on local water quality. In hard water areas, cartridge descaling may be required annually. Consider full cartridge replacement every 3–5 years in continuous commercial service. Contact the Legom team for cartridge replacement specifications for the DN32 model.
OEM & ODM Customization
Legom supports OEM and ODM services for the HFT65001 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.
