Application: -, , petrol below 90#.The slim shape of the - fer and the balanced weight of the fer body make the operation easy and labor-saving.With high strength, light weight, wear resistance, resistance and excellent sealing properties.The fer is equipped with a bright color plastic sheath, comfortable. The self-sealing fer has the function of automatically shutting down the fer after the oil fills the container, which is a modernization support for the metering tanker. It is especially suitable for unmanned gas stations, which can prevent oil or foam from overflowing, keep the station clean, and reduce air pollution. Working principle:The nozzle is equipped with a thin vacuum tube. When the pressure lever is in the "on" position, the liquid flowing from the fer sucks air through the small hole in the nozzle into the vacuum tube. As long as air passes through the vacuum tube, the liquid continue to flow, when the tank When the liquid level rises to cover the height of the hole in the nozzle, the air stops flowing and the fer closing device automatically starts. Designed for factories, gas station and househood use Auto-off when the oil is fulfilled,Easy to clean, install and maintain. Install the connector: (1)If the fer inlet is a NPT ()tapered thread, with a suitable sealant. (2)If the fer inlet is BSPT (British standard)straight thread,it must be sealed with a rubber O-ring. (3)Connect the connector to the inlet of the fer with care.Do not overtighten the threads to prevent the fer body from cracking. Operation: (1)The fer switch shall be set with 3 fixed gears,which can be refueled according to the flow size. (2)During the refuelingprocess,when the oil or foam submerges the air hole at the lower end of the ,the fer automatically close.If or foam causes the fer to close,the foam can disappear a