CONTROL MOTORS

In many industrial or commercial combustion installations the process temperature or pressure is controlled by an electronic instrument that senses temperature or pressure and relays to the burner the process heat input requirement.

The control instrument sends an electronic or electrical signal to the burner fuel input control equipment.

In many burner installations the control equipment comprises of a valve controlled by an electrical motor. The valves may be of the butterfly or ball type, and are generally connected to the control motor by means of a flexible, adjustable linkage.

Some ball type valves have the control motor fitted directly to the valve operator shaft.

Control motors normally use and operate with a 24v ac electrical supply, although motors that use 230v ac or 110v ac are available. Some motors are fitted with internal transformers to reduce the supply voltage down to the 24v ac required.

The conventional control method been to use a simple electrical balancing potentiometric system, although many modern burners are fitted with instrumentation that uses an electronic signal.

For more information regarding the design, structure and application of Control motors consult the Technical (controls) section of this web-site.

Honeywell Modutrol IV Motors

The Honeywell control motors specified (New release 2007) are suitable for operation with 50/60 HZ electrical supplies.
Motors are supplied with end switches as standard.

Joventa Control Motors

Joventa control motor, types DAS, DA and DAL are supplied suitable for 2 and 3 point control signal.
Motor types DMS, DM and DML are supplied suitable for 0-10v and 4-20ma control signals.

The Joventa motors are suitable for operation in ambient temperatures between -20C and +50C and as standard comply with IP44 protection requirements.
The protection ratings of the motors can be increased to IP54 when fitted with PG11 cable glands.
Some motor models are available for operation with 110v and 230v electrical supply.