The Solenoid Quick Release Mechanism MKI is designed to provide a simple electro-mechanical release mechanism for gravity-operated devices such as the Landon Kingsway free fall fire valve.
There are many instances when it is desirable that the oil/gas supply to a burner should be capable of being shut off by electrical means rather than purely mechanical means.
It may be necessary that the duel supply should be severed through the medium of an elctro-thermal link, recording an excessive air temperature, or by a float switch indicating that an oil pipe has fractured allowing oil to flood into a boiler house. There are also cases where is it more convenient to use electro-thermal links and electrical cable rather than tension cables and fusible links, which can be unsightly and difficult to run.
The Solenoid Quick Release Mechanism MKI holds open a weight-operated fire valve whilst current is flowing to the unit which releases the weight-operated fire valve, allowing it to fall into the closed position when the current to the unit is interrupted.
The solenoid-operated quick release mechanism consists in essence of cable wound onto a drum and the drum is attached to a toothed gear wheel. A solenoid within the box is fitted with an extension, so arranged that it will lock the toothed gear when the solenoid is energised. If the electrical supply to the solenoid is interrupted the toothed gear and the drum are free to rotate which allows the weight-operated fire valve to shut and close the oil/gas supply to the boiler house. The maximum direct weight the unit will carry is 30lbs, but, of course, by using mechanical advantage far greater weight can be supported.
The advantages of the SQR are; it is absolutely positive and immediate in its action, the device is considerably cheaper than the use of a solenoid valve directly in an oil/gas line, and it fails ‘safe’ as any interruption in electrical supply will result in the oil/gas supply line being closed.
The MKII unit is as above but incorporates two switched power outputs, one normally on and turns off, the other is normally off and turns on in the event of an emergency.
SQRM MKl 24v DC
SQRM MKl 110v AC
SQRM MKl 230v AC
SQRM MKll 24v DC c/w Aux Switches
SQRM MKll 110v AC c/w Aux Switches
SQRM MKll 230v AC c/w Aux Switches