The hydraulic diaphragm metering pump is one of the piston diaphragm metering pumps. It is a new type of metering pump combined with the characteristics of the plunger metering pump and the diaphragm metering pump. The metering pump is in contact with the medium of the measured medium, and the driving part is a hydraulic plunger.

In the family members of diaphragm metering pump, the diaphragm diaphragm pump is driven by hydraulic oil to drive diaphragm evenly, which overcomes the disadvantage of too much stress on the diaphragm of the pump driven by mechanical direct drive, and improves the life of diaphragm and the upper limit of working pressure.

In order to overcome the failure of the single diaphragm metering pump may occur due to membrane damage caused by, some damaged diaphragm metering pump is equipped with sensors, to achieve automatic linkage diaphragm rupture protection; measurement with double membrane structure of the pump head to further improve its safety, for particularly sensitive applications for security protection.

The piston diaphragm metering pump is driven by the driving gear to drive the hollow plunger reciprocating and drives the measuring diaphragm through the hydraulic oil in the hollow plunger. The hollow plunger has a special design to adjust the air, so that the hydraulic oil inside and outside the plunger is the same. The piston outside the plunger has a adjustable slip ring for closing the regulating air. When the regulating hole is closed, the plunger pushes the hydraulic oil inside to drive the metering diaphragm. In each stroke, the amount of hydraulic oil that is driven by the plunger to drive the metering diaphragm is exactly equal to the quantity of the measured medium.

The flow of the metering pump can be adjusted by the manual knob on the plunger flange, and it can also be realized by the frequency converter and the servo motor. The metering pump with pressure change and change, can be carried out in the static state and 0100% linear regulation. The adjustment precision is high. The air plunger is not fixed on the eccentric wheel of the motor. In the suction stroke, the plunger is bounced back to the zero position by the spring, thereby effectively preventing the damage caused by the suction medium when it forms blockage in the metering head.

The suction valve is opened in the medium of the medium to inhale the medium into the metering head, and the suction valve is cut off when pressure is pressurized.

The pressure valve is opened during the medium pressure process and is closed during the inhalation to prevent the pressed medium from reflow into the metering head.

All series metering pumps produced by Huaian hydraulic diaphragm metering pump manufacturer are equipped with an overpressure safety valve that has been set up. The valve is installed at the pressure bearing end and is used together with the hydraulic system. If the pressure end of the pump is blocked, this safety will automatically jump, thus effectively protecting the pump and the whole pipeline system.