Pump works are what

manual gas pump: The engine crankshaft via two belt-driven air pump, which drives the piston pump, hit the gas through a pipeline to import gas cylinder. On the other hand accumulator and through a gas pipeline to the gas introduced into the gas cylinder is fixed to the pump's pressure regulator to control the gas cylinder pressure. When the gas pressure within the regulator set-Jane's pressure is not reached, the gas enters the regulator from the gas cylinder pressure regulator valve can not open items; when the gas cylinder pressure regulator adjusted to achieve the predetermined pressure when entering the regulator from the gas cylinder gas pressure regulator valve to open the top, into the pump in communication with the regulator airway and controls the pump inlet through the airway normally open, so that the pump empty load operation , to reduce power consumption, pump protection purposes. When the gas cylinder pressure regulator due to wear and tear and it is set lower than the pressure within the regulator valve return spring to return, disconnect pneumatic air pump control, mechanical pump. My personal solution is crooked between accumulator and catheter valve, cheer when the gas pressure to the inside because the outside world opened up when mentioning the reason because the intake is closed, so accumulator sucked outside air rather then playing into the air sucked out.