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MANUFACTURE of the Ejectric water ejector valve hitherto made in America and imported into the UK is announced by Leeway Engineering Ltd. In taking on the manufacturing of the valve Leeway has succeeded in reducing the price and claims to be producing a better unit.
The Ejectric valve is claimed to overcome the incidences of moisture freezing in air-pressure braking systems and is becoming extremely popular with users of rear-engined buses. It comprises a magnetically-operated shuttle-valve which is affixed to the underside of the air reservoir and it traps moisture formed in the system in an accumulator section.
The unit is electrically coupled to some suitable source of intermittent power—for instance, the stop lights—which will at regular intervals cause the shuttle to lift away from the exhaust seat, so blowing down the accumulator section and dispersing its contents to atmosphere.
Where vehicle operations are such that long periods may elapse before the unit is operated—such as on motorways—the valve can be linked into a normally closed intermittent circuit. Thus the current is continuously applied to the magnetic coil and heat generated here will ensure that the valve cannot remain closed through freezing.
The I2V coil draws only 1 amp., and by isolation through the starting switch it will not cause a current drain when the vehicle is standing. Intermittent breaking of the circuit in which the valve is included will cause it to operate in the same way as before.
The unit requires no maintenance and the only moving part is the shuttle valve or plunger. This can easily be replaced without disturbing the unit. Valves produced in the UK will be equipped with insulated earth return connections and 24V coils.
By stOpping the accumulation of moisture in braking systems the Ejectric valve reduces the chance of clogged and rusted pipelines, corroded relay valves and brake valves and ensures that clean and dry air is supplied at all times to the units powered by it.
Made by: Leeway Engineering Ltd., 63 Stirling Road, Glasgow C4. Price: £5 6s. Normally closed relay, £1 15s. extra.