Description
This is a straightforward thermostatic radiator valve and lockshield pack intended for domestic central‑heating radiators. The kit combines a liquid‑filled thermostatic head and a matching chrome valve body with a lockshield, giving individual-room temperature control so you can set a radiator to a steady comfort level while the boiler and other controls do the heavy lifting.
In practice this sort of pack is used either when fitting a new radiator or when replacing worn manual valves. The chrome finish keeps the look tidy and neutral; functionally it behaves like most two‑way TRVs in the trade — you select a number on the head (the manufacturer maps those numbers to approximate temperatures) and the valve modulates flow to hold the room temperature within a few tenths of a degree of that setting.
Key specifications
- Temperature range (approx): 7°C to 28°C
- Pipe compatibility: 10mm–15mm
- Radiator connection / tail: 1/2″ BSP
- Maximum working pressure: 10 bar
- Maximum differential pressure: 1 bar
- Maximum water flow temperature: 110°C
- Sensor: liquid‑filled element; hysteresis ~0.2K
- Kv (flow coefficient): ~1.0 m3/h (at ΔP = 1 bar)
- Finish: chrome‑plated valve body and TRV head
Where this pack fits
The pack is aimed at standard domestic radiator installations: it supplies a TRV body intended for 15mm compression connections with the option to suit 10mm pipework (reducers are referenced by the manufacturer). The body is reversible so it can be mounted for either flow or return, and the head will work both vertically and horizontally. That makes the set a good, low‑complexity choice for most living rooms, bedrooms and other spaces where independent radiator control is wanted.
How it behaves day‑to‑day
The liquid sensor inside the TRV’s head reacts to room air temperature and moves the valve spindle to reduce or increase hot‑water flow, keeping the area close to the chosen setting. The pack provides frost protection and a graduated 0–5 scale (commonly mapped to isolation → 7°C and 5 → 28°C on this range), so you can leave radiators switched on at a low setting when a property is unoccupied, or dial rooms down individually for energy saving.
Installation and compatibility notes
Technically the pack is supplied with standard 1/2″ BSP tailpieces and 15mm compression fittings. If you have 10mm pipework you should verify whether a reducer is supplied with the merchant’s item — the product documentation references a 10mm reducer kit, which is normally available as a separate component. The valve body is bidirectional and fully reversible, and mounting can be horizontal or vertical; those features make it flexible for tight or unusual pipe runs.
Maximum working pressure is 10 bar and the valve’s differential pressure and hysteresis figures are typical for a trade TRV; this means it will give stable control in fully pumped systems but very high pressure or aggressive system imbalances may reduce accuracy. As with any radiator control, avoid fitting TRVs directly under an extractor fan, behind heavy curtains or on the same wall as a fixed room thermostat — local temperature distortions will affect control.
Practical advantages and limitations
- Advantages: simple, robust and inexpensive way to add per‑room control; chrome finish is unobtrusive; reversible body and vertical/horizontal head make fitting easier.
- Limitations: basic mechanical TRV — no remote/programming features; if your pipe run is 10mm you’ll need to confirm reducer inclusion; the connection is 1/2″ BSP tail so check your radiator’s tailpiece type before purchasing.
Finally, the manufacturer documentation explicitly recommends that valve installation be carried out by a competent person. That’s partly to ensure the correct sealing and alignment of compression fittings and partly because radiator balancing (lockshield adjustment) is a small but necessary follow‑up task if you want even heat distribution across a system.
