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» Control Motors
» Electrical Controls
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» Safety Shut Off Valves
» Solenoid Valves

MULTI ACTUATOR VALVES - MULTI BLOCK VALVES

In order to comply with safety and process requirements, combustion equipment is normally fitted with a control valve assembly that includes various individual valves and controls having various functions.

The control valve assembly can take up considerable space and involves considerable labour time in its assembly and installation.
The space taken by valve assemblies is a particular problem in the case of industrial and commercial appliances such as water boilers, steam boilers and air heaters.

Several manufactures of controls have developed and introduced into the burner market what are referred to as ‘Multi Actuator Valves’ or ‘Multi Block valves’.

The simplest form of a multi actuator valve is a unit that includes two solenoid or safety shut off valves; however most units include a wire mesh filter and a gas governor/regulator. The safety shut off functions can be supplied fitted with on-off, high-low or even modulation control.

Manufacturers have extended the scope of the multi block concept by adding start gas valves, low fire start facilities and high and low gas pressure switches so that a complete valve system to suit almost all applications can be supplied as one integral unit.
Multi block valves can be supplied suitable for use with various types of gas and capable of operation with a wide range of electrical supplies.

Care should always be taken to ensure that the specification of the valve complies with the electrical requirements, gas operating pressure limits and the local gas authority quality and approval requirements.

For more information regarding the design, structure and application of Multi Actuator valves or Multi Block valves consult the Technical (controls) section of this web-site.

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MANUFACTURERS

» Dungs
» Gasteknic
» Johnson
» Kromschroder











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Dungs Multibloc Valves

The Dungs range of Multiblock valves are suitable for operation within an ambient temperature range of -15C to +70C.
The valves units are suitable for use with 50/60Hz electrical supply and can be supplied to operate with either 110v or 230v.
Although standard valve units are supplied to control with an outlet pressure range of 4 to 50 mbar; sizes 415 and 420 if required can be supplied with an oulet pressure controlrange of 20 to 50 mbar.

SINGLE STAGE OPERATION - Combined regulator and safety shut-off valves

Model Type Size Voltage Max. Inlet Pressure Outlet Range IP
MBDLE 405 B01 1/2" to 3/4" 230v 360 mbar 4 - 20 mbar IP54
MBDLE 407 B01 1/2" to 3/4" 230v 360 mbar 4 - 20 mbar IP54
MBDLE 410 B01 1" to 1.25" 230v 360 mbar 4 - 20 mbar IP54
MBDLE 412 B01 1" to 1.25" 230v 360 mbar 4 - 20 mbar IP54
MBDLE 415 B01 1.5" to 2" 230v 360 mbar 4 - 20 mbar IP54
MBDLE 420 B01 1.5" to 2" 230v 360 mbar 4 - 20 mbar IP54

TWO STAGE OPERATION - Combined regulator and safety shut-off valves

Model Type Size Voltage Max. Inlet Pressure Outlet Range IP
MBZRDLE 405 B01 1/2" to 3/4" 360 mbar 4 - 20 mbar IP54
MBZRDLE 407 B01 1/2" to 3/4" 360 mbar 4 - 20 mbar IP54 3.2 Kg
MBZRDLE 410 B01 1" to 1.25" 360 mbar 4 - 20 mbar IP54 6.5 Kg
MBZRDLE 412 B01 1" to 1.25" 360 mbar 4 - 20 mbar IP54 6.5 Kg
MBZRDLE 415 B01 1.5" to 2" 360 mbar 4 - 20 mbar IP54 8.1 Kg
MBZRDLE 420 B01 1.5" to 2" 360 mbar 4 - 20 mbar IP54 10.2 Kg


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Kromschroder Mult-actuator Valves

The Kromschroder range of Moduline valves are suitable for operation within an ambient temperature range of -15C to +60C.
The valves units are suitable for use with 50/60Hz electrical supply and can be supplied to operate with either 110v or 230v.

SINGLE STAGE OPERATION - Type CG Double safety shut-off valves

Model Type Size Voltage Max. Inlet Pressure   IP
CG1 20 3/4" 230v 100 mbar IP54
CG2 20 3/4" 230v 100 mbar IP54
CG2 25 1" 230v 100 mbar IP54
CG2 40 1.5" 230v 100 mbar IP54
CG3 25 1.5" 230v 100 mbar IP54

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Johnson and Gasteknic Multi Actuator Valves

The multi actuator valves once supplied by Johnson Controls Ltd., and Gasteknic Gmbh are no longer available. In order to replace these valves in the case of breakdown and system failure it will be necessary to replace the existing assembly with either a multi-actuator valve of a different manufacture, or with a special valve assembly. When replacing this equipment it is necessary to comply with all applicable regulations and standards. For further information regarding the costs and practical implications of replacing these items please contact us.

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Comtherm Limited accepts no responsibility or liability for the accuracy of information provided on this web-page. technical data and dimensions should be confirmed with the relevant Comtherm Limited Sales or Technical office.