The flow meter converts the flow of petrol sent from the pump to the rotating movement with a crankshaft by means of piston's reciprocating movement for display on the counter. The flow meter can measure the flow of petrol very accuracely.
(1) Petrol sent from the pump enters the cylinder through the slide valve,pressing the piston at A side inward.
(2) Then the B side piston is pushed outward and petrol in the cylindar B is sent to C through the slide valve opening and discharged from the nozzle. The pipe and hose are fitted to the discharge port of the flow meter and connected with the nozzle.