Analyze and summarize the common faults, and then solve the problem.

First: small flow is not self-styled
The reason is that in the small gasoline flow meter, the flow rate is low, the suction effect is small, the pressure difference between the upper and lower chamber of the switch film is small, can not overcome the elasticity of the spring so that the self- To solve this problem, it is necessary to reduce the spring force of the spring.
Second: refueling guns are not self-styled
The reason for this is that the upper surface of the diaphragm is sealed with the outside, for example, the upper part of the plastic cap is not tightened, and the "O" type seal on the adapter and the sub-seat of the oil gun is damaged. The diaphragm can not form a pressure difference. To solve this problem need to tighten the plastic cover pressure wire, replace the "O" seal.
Third: refueling guns often self-styled
The reason is that the nozzle inside the electronic diesel fuel pump is blocked by foreign body, poor air intake or open the membrane on the cavity of the spring caused by the spring is too small. Solution: clear the foreign body in the intake pipe, stretch the spring to enhance the elasticity.

Analyze the precautions regarding the use of the dispenser valve.

   1, please do not apply fluid other than fluid.
   2, do not use the maximum use of pressure restrictions.
   3, do not use outside the use of temperature range, to prevent the sealing material caused by wear or leakage.
   4, do not carry out artificial hit, bending, stretching, to prevent damage caused.
   5, do not mix in metal powder or sand dust and other diesel fuel flow meter to use, to prevent poor work or leakage.
   6, the installation of the thread, do not exceed the maximum tightening torque installed to prevent damage caused.
   7, do not use cracks with the hose, to prevent leakage or fall off.
   8, such as for vibration, the impact of the machine will cause reduced durability.

What are the working materials for the tanker?

First, the oil marine fuel dispensers
1. Small tanker after the gun, the signal sent to the electrical room of the electromagnetic switch
2. Electromagnetic switch action, the 220V power supply to the sinking pump
3. After the oil pump moves, the oil is piped to the tanker
4. The oil of the small tanker is filtered by the filter and flows into the flowmeter when the solenoid valve is opened
5. After the oil flow meter:
(1) oil along the leather tube, from the device, oil gun out of oil. (2) flow meter action, the pulse generator to send signals to the electronic board measurement
Second, self-priming retail fuel dispensers
1. Small tanker after the gun, the signal sent to the tanker electronic board
2. Small tanker electronic board to send signals to the motor power board
3. Motor power supply (110V or 220V) to the motor
4. After the motor action to drive the pump, the pipeline will be oil from the tank to the tanker
5. After the oil is filtered through the filter, when the solenoid valve opens and flows to the flowmeter
6. After the oil flow meter: (1) oil along the hose, from the device, oil gun out of oil. (2) After the flowmeter moves, the signal is transmitted by the pulse generator
automatic fuel dispenser by the computer will be stuck ash processing after the boot signal to start the motor, and the measurement of the original data back to zero, while the motor drive pump rotation, the oil into the oil and gas separator, separated by oil and gas, into the The meter measures and delivers oil to the oil container through the hose and oil gun.

Tanker tanker used;
(1) on-board pump refiner Oil and gas separator is equipped with a filter, which consists of copper wire mesh and felt mesh sets, the separator side wall has a triangular cover can remove the filter. The filter of the combined pump refiner is installed in the inlet port. Submersible pump type tanker installed with a special filter box, open the end cap to remove the filter. The filter should be cleaned regularly (at least once a month) with gasoline to clean the copper mesh cover, damage should be replaced, and remove dirt from the oil machine to protect the pump and flow meter.
(2) gas station management software and the combination of the pump on the relief valve adjustment screw used to adjust the pump pressure, and then adjust the tanker's oil discharge. Factory has been adjusted. After long-term use, such as the amount of oil dropped, the adjustment screw can be tightened in order to increase the pressure of the pump, but not more than 0.3MPa, so that the amount of oil to meet the requirements.
(3) Combination of pump-type tanker is only suitable for underground tanks, such as the use of high oil tank, there will be exhaust pipe oil phenomenon, then be sure to block the exhaust pipe.
(4) the use of oil guns to avoid the oil gun with the oil pipe percussion by oil containers, press the switch and other abnormal operation, so as not to damage the electronic diesel fuel pump, causing oil spills. To check regularly, tighten the screw on the tubing to prevent the oil pipe root loose, damaged, underground storage tank regularly cleaned to keep the oil clean.
(5) the accuracy of the adjustment of the machine should be "JJG443-86 metering tanker test procedures," the relevant provisions.
(6) overhaul the electrical part of the power must be cut off, should not take electricity repair. Do not damage the explosion-proof surface when opening the explosion-proof case. When the explosion of dust inside the dust should be clean, the cable seal should be good, metal pads, gaskets can not be lost, the number of screws is not missing, tightened to ensure that the electrical components of the explosion-proof performance.

The actual work found in the tanker oil and gas separator common faults are:

First, oil and gas can not be separated
Oil and gas can not be separated from the main performance is the oil in the oil turbidity, a large number of small bubbles in the oil.
There are many reasons for the separation of oil and gas, oil and gas separator flexible pipe below the pipeline, valves, joints in any one lax, may be inhaled gas (pipe is negative pressure), when the amount of gas inhalation beyond the oil and gas separation The ability to separate the gas, it will produce oil and gas can not be separated from the phenomenon.
When there is no separation of oil and gas, first of all to check the tank to the tanker between the oil pipeline is leaking phenomenon, the method is to open the oil and gas separator filter cover, see the oil and gas separator low pressure chamber is oil, if no oil Or oil level slow down, you can initially determine the oil spill. After eliminating the reasons for the pipeline, and then check the oil and gas separator, the simple method is: the tanker in the boot state, with your fingers near the oil and gas separator exhaust pipe, such as the exhaust pipe suction finger, you can determine the cone The valve does not close the oil and gas can not be separated.
Second, the exhaust pipe spit oil
When the tank liquid level higher than the tank calibration software oil and gas separator height, can cause the exhaust pipe to spit oil. Therefore, in the face of exhaust pipe spit oil, the first to see whether the gas station is set up tank, if the elevated tank, the oil and gas separator exhaust pipe can be blocked.
Third, no oil or oil shortage, vibration and noise
Oil filter in the oil separator is too dirty will cause the tanker is not fuel or oil shortage, vibration and noise, and filter cover and very easy to dirty, so the tanker once the above situation, should first consider the cleaning filter Cover, followed by unloading the lower part of the oil valve spring seat, cleaning the oil valve.