New Products

Hattersley launches it's MultiComm, a multi-terminal, centrally located commissioning system for maximum convenience and minimal disruption.

The MultiComm provides one easy access point for commissioning and maintenance of multiple heating/chilled water terminal units.

The MultiComm is an exceptionally efficient, practical and versatile system:

• Depending on flow rates, up to six terminals can be served from a single MultiComm unit.
• All units are custom built to suit site specification.
• All site connections can be made without the need to access the internal components.
• CommPac is suitable for variable flow or constant flow systems.
• All connections are BSPT female, enabling standard pipe or specialist adaptors to be used.
• Fan coil units can be flushed, vented and balanced without the time-consuming 'looping out' procedure. This can be carried out by one commissioning engineer instead of a team.
• A single strainer serves all circuits, eliminating the need for individual strainers.
• All systems can be flushed through the unique Hook-Up II 'H' body.
• The single DPCV maintains constant differential pressure between manifolds.

Hattersley has launched a new range of Hook-Up II flow management modules for HVAC terminal unit applications such as fan coils and chilled beams.

The units provide flow control, flow measurement, flushing and isolation capabilities from a single compact and lightweight unit. Built from bronze and DZR brass the complete range is PN16 rated in three sizes – 0.5 inch, 0.75 inch and 1.0 inch – and includes versions suitable for use in chilled water, low temperature heated water and medium temperature heated water systems from –10 oC to +120oC.

The newly designed Hook-Up II features a number of design improvements. A single- casted H-body reduces the number of extra connections and reduces the weight and size of the unit. Any combination of components can be selected to attach to the H-body, depending on site specifications.

Using a single, pre-tested unit, containing all the necessary components, ensures a predictable performance and minimal design involvement.

For the contractor, the fact that there are only four connections offers significant reductions in installed cost compared with alternatives.

Benefits for users include operation which is maintenance-free apart from occasional cleaning of the integral strainer which filters the flow into the connected terminal unit.

A centralised isolation ball valve allows easy back flushing, forward flushing and isolation while a separate isolation ball valve permits flow to the terminal unit to be shut off. The integral commissioning set adjusts and sets the flow rate with a high level of accuracy using either a manual or a motorised valve.

Three built-in pressure test points allow monitoring of the pressure drop across the load and the orifice for flow measurement.

Hattersley - has launched a range of Differential Pressure Control Valves (DPCVs).

A new addition, to the Hattersley range of commissioning valves, the DPCV is compact and modern in design and is available for both flow (F300) and return (R300) configurations in sizes DN15 to DN50. The DPCV operates across a temperature range of -10 to 100°C and is PN16 rated.

The stem position is controlled by the differential pressure acting across the diaphragm. The stem closes on rising differential pressure and opens on falling differential pressure. The valve will continue to move in this way until equilibrium of pressure is achieved.

The DPCV can be set on installation to a maximum differential pressure limit of 20 to 100 kPa. Under dynamic balancing conditions, the valve can then be adjusted easily on commissioning as conditions dictate. This ensures that differential pressure cannot exceed the set control limit thus maintaining the control authority of the two port control valve.

Installing DPCVs into a system brings numerous benefits - they control the differential pressure and therefore flow rate, and also help reduce pump energy consumption, when using a variable system. In fact, BSRIA figures suggest that DPCVs help reduce the pump energy consumption of a typical heating system by 60-70%. In addition, the risk of noise is lower and a consistent circuit performance is maintained.

A system which contains a DPCV remains balanced independent of any changes in other areas of the circuit, allowing commissioning to be carried out in sections. This means the entire system does not need to be commissioned at the same time which greatly simplifies the balancing and commissioning procedure.

An impulse tube is supplied with the DPCV to link and transport pressure between flow and return pipework. It plays an essential role in allowing the DPCV to open and close depending on system conditions.

When paired with the Hattersley (DP1732) companion valve, the DPCV can be used to set and maintain a flow rate. By using the DP1732 Fixed Orifice Double Regulating Valve to measure, the DPCV can be adjusted to set the required design flow rate. Any variations in other areas of the system will therefore not impact on the flow rate to the sub-circuit.

Hattersley has launched a new range of WRAS (Water Regulations Advisory Scheme) approved DZR brass ball valves. The range includes six compression sizes from 15 to 54 mm and eight threaded sizes from 1/4" to 2"

The units provide flow control, flow measurement, flushing and isolation capabilities from a single compact and lightweight unit. Built from bronze and DZR brass the complete range is PN16 rated in three sizes – 0.5 inch, 0.75 inch and 1.0 inch – and includes versions suitable for use in chilled water, low temperature heated water and medium temperature heated water systems from –10 oC to +120oC.

With the aim of reducing the risk of installation damage, Hattersley have added extra seals to the new ball valves. A metal to metal primary seal on the body seat retainer joint, combined with loctite 648 seal provides greater strength and sealing capabilities. An O ring seal in the main joint provides additional protection against leakage for the threaded versions.

A waterproof and tear-resistant tag attached to each valve gives installation instructions, including the number of wrench turns needed to give positive sealing without over-tightening. Hattersley valves also fully comply with thread length as specified in BS EN 10266.

The DZR brass used in their construction means they are suitable for use over a temperature range from –10 to 120 degrees Celcius, making them ideal for HVAC applications. Their WRAS approval means they can also be used with potable water supplies.