Discount-Heating Circuit Controls (Zone valves Y/S Plan)

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Online Catalogue > Heating and Climate Control > Thermostats, Valves and Heating Controls > Circuit Controls (Zone valves Y/S Plan)

Horstmann (Motorised Valves)

ACL-Drayton (Invensys)

Myson

Honeywell

Danfoss Randall

Discounted Heating 'Easy Pick Heating 3Port & Zone Valves'

Port Diverter Valves - Valves that only permit flow through one outlet port at a time.

Port Mid Position Valves - Valves that allow flow through any combination of outlet ports at the same time.

Port Zone Valves - Valves that are either open or closed to the flow.

Both 2 and 3 port valves are commonly used and the choice depends on the application, pipework layout and preference.

3 port valves are suitable for providing separate heating and hot water circuits. There are two types of 3 port valves, one type only diverts the full flow of water whilst the other provides a mid position so that shared flow is possible.
For more than one heating zone, in addition to a hot water zone, use a separate 2 port valve for each additional zone.
22mm valves are usually suitable for boilers up to around 20kW. For larger boilers and when fitting a motorized valve on a gravity hot water circuit, 28 mm or larger should be used

Auxiliary switches on valves should be wired to switch the boiler/pump off when there is no demand for heat or hot water.

Boiler Management - Specialist control sets that provide a wide range of functions that non of the above can offer. Often seen to be of energy saving value as well as enhancing the quality of the installation.

Diverter - Where one heating and one hot water circuit is controlled using one valve only and where only one of the circuits can be in use at any time.

Mid Position - Where one heating and one hot water circuit is controlled using one valve only and where both circuits can be in use at the same time.

Multi Zone - Where there are two or more heating and one or more hot water circuits. This system can also be used on heating only installations.

Semi Gravity - For use on pumped heating and gravity hot water installations. Both parts of the system can be in use at the same time.

Zoned - Where one heating and one hot water circuit is controlled using two zone valves. This system can be used on heating only installations.

ACL-Drayton (Invensys) Individual 679 H308-30L1 22mm 2-port motorised valve

ACL-Drayton (Invensys) MA1/679 22mm Mid-Position Valve

ACL-Drayton (Invensys) Individual 779 H335-30L10 28mm 2-port motorised valve

ACL-Drayton (Invensys) Individual 779 H340-30L0 28mm 3-port mid position valve

ACL-Drayton (Invensys) Cyltrol 1" Straight