Herz Valves UK Ltd
Herz will be displaying our in house manufactured range of UFH products for the UK market, complete with HERZ Pro-Plan, our bespoke UFH design service. We will also have the new Dynamic UFH Manifold, which is a pressure independent control system designed for UFH, to increase the efficiency and control of the UFH.
- Heating systems
- Pipes, fittings and valves
- Underfloor heating
The HERZ COMPACTFLOOR enables individual heating of rooms and is a ready-to-connect control station that includes a high-efficiency circulation pump. The HERZ COMPACTFLOOR is available in different models: for direct connection of underfloor heating to a high temperature system (either with or without high temperature outlets), for direct connection using a separating heat exchanger and with all the equipment required for the secondary low temperature circuit (expansion tank, safety valve...)
For the distribution of heat and cold, we recommend the modular manifolds made of brass, stainless steel and plastic from HERZ. They are designed as standard with a drain and vent valve in the flow and return manifold as well as sound-insulated fastening brackets. For connection to the manifolds, cone-sealing compression fittings are available for different pipe dimensions. The flow meter versions up to 3 l / min or up to 6 l / min are also available. In the product variant with thermostat upper parts (M 28 x 1.5) in the return manifold, the distributors can optionally be equipped with thermal actuators for individual room temperature control.
The right connection PIPEFIX, the pipe and connection system certified in accordance with ÖNORM EN ISO 21003, is made of dezincification-resistant and drinking water hygienic brass. The tightness is guaranteed by 2 O-rings. The pressing is carried out using a stainless steel press sleeve. In the unpressed state, the system is leaky (up to Ø 40 mm) - so unpressed areas can be reliably found during the leak test. The press fittings are available in all common designs (angle, coupling, reduction, T-piece, etc.) and are available up to dimension 75mm. To check the correct insertion depth of the pipe, viewing windows are attached to the compression sleeves. The aluminium layer and fitting are galvanically separated with a centring ring.
Dynamic UFH Control
The HERZ 4012 VS-TS differential pressure control valve with integrated throttle is designed to be used for dynamic balancing, regulation and control of heating and cooling circuits, in particular such circuits, where flow limiting from outside the circuit is desirable. Examples of such circuits include: • Underfloor heating manifold. As the pressure is approximately constant inside each of the manifold bars, all loops see the same differential pressure. Just the value of this pressure difference needs to be maintained using the 4012 VS-TS. This is a more cost effective and more dirt resistant solution as compared to fitting pressure independent thermostatic valve inserts at the individual loops. • When the manifold serves a single zone, the whole zone can be controlled by a single actuator mounted to the HERZ 4012 VS-TS. • A circuit of radiators within a single zone, where no control device (no thermostatic valves) is fitted to the radiators and the entire zone is controlled by a room thermostat. • Dynamic regulation of flats, where an external flow limitation is of an advantage. • A circuit of radiators fitted with radiator valves lacking the presetting functionality. The HERZ 4012 VS-TS can be regarded as an external presetting for limiting of the maximum flow through all control valves within the circuit. In applications where the flow can be throttled within the circuit, for example by means of pre- settable TRV’s, the flow limitation device integrated within the 4012 VS-TS is of little importance and a HERZ 4002/4202 differential pressure control valve may be used instead. The HERZ 4012 VS-TS can also be fitted with an actuator. The valve can thus be used as a zone valve or to control the flow through the circuit. Alternatively, the valve can be fitted with a shut-off cap to close the valve manually. It is recommended that the control valves within the circuit, such as the thermostatic valves, be appropriately sized for their respective design flow. Otherwise, these control valves may lose their authority to the throttling valve built into the HERZ VS-TS, if the presetting on the VS-TS is applied..
Herz presents Dynamic UFH
The Herz Dynamically Controlled UFH Manifold