• Performance characteristics of JTM hydraulic diaphragm metering pump

A larger displacement of 7000L/h,
High pressure of 64MPa;
Can transport various corrosive media such as strong acids and alkalis;
Unique diaphragm detection to prevent hazardous material leakage;
The pump head can be made of stainless steel or lined (F4, F46, F3);
It can be equipped with a dedicated PLC stroke controller for automatic control, and can also achieve 4-20mA signal automatic control through frequency conversion.

Performance and structural characteristics of JTM hydraulic diaphragm metering pump

1. Constructed using an N-shaped crankshaft machine
2. The pump can adjust the flow rate in both running and stopping states, with an accuracy of ± 1% and no leakage
3. The pump head and power box are correctly separated, and the cast iron gearbox is reinforced to ensure long-term service life
4. Hydraulic driven diaphragm pump, dual diaphragm and diaphragm rupture alarm optional, diaphragm life ≥ 8000 hours or more
5. PTFE composite diaphragm, with better anti-corrosion performance and more durable use
6. Reasonable structure, reliable performance, smooth operation, easy adjustment, and simple maintenance.

Structural principle of hydraulic end hydraulic diaphragm metering pump

The hydraulic end of a hydraulic diaphragm metering pump consists of a plunger, cylinder body, cylinder head, inlet and outlet valves, diaphragm, three valves (relief valve, limit valve, compensating valve) or a built-in oil replenishment valve. During diaphragm operation, hydraulic oil and medium are separated, so diaphragm metering pumps have the advantage of no leakage and are an ideal tool for transporting flammable, explosive, volatile, highly corrosive, radioactive, highly toxic, and expensive media.
The hydraulic end plunger of the hydraulic diaphragm metering pump is driven by the reciprocating motion of the crank connecting rod mechanism at the transmission end. The plunger moves back and forth in the hydraulic chamber, causing the pressure of the hydraulic oil to change and causing the diaphragm to bend and displace to transport the medium. The relative stability of hydraulic oil volume in the hydraulic chamber is maintained by the function of the three valves. The air release safety valve can release the gas entering the hydraulic chamber from the hydraulic oil, ensuring smooth operation and avoiding the adverse reaction of excessive hydraulic oil or blocked drainage pipes causing overpressure and automatic oil discharge. The limit compensation device uses a diaphragm to push the opening of the limit valve, and replenishes the oil at any time according to the vacuum degree in the hydraulic chamber to ensure the filling of the hydraulic oil in the hydraulic chamber.

Installation requirements for JTM hydraulic diaphragm metering pump

1. The pump should be installed on a dedicated spare concrete foundation or iron casting platform, and fixed with anchor bolts after calibration. The concrete foundation should be at least 50-100 millimeters above the ground.
2. The diameter of the suction and discharge pipes should not be less than the diameter of the inlet and outlet pipes, and the suction pipeline should be shortened as much as possible. If the suction pipeline is too long or there are too many elbow joints, NPSHa calculation should be carried out to meet the required net positive suction head.
3. The connecting pipeline should be equipped with measuring instruments, such as pressure gauges (to be provided by the user).
4. The end of the suction pipeline should be equipped with a filtering device (to be provided by the user).
5. The discharge pipeline should be equipped with a safety valve or a safety relief valve (to be provided by the user). To reduce outlet pressure pulsation, a stabilizing device can be installed near the pump discharge pipeline.
6. Electrical control equipment should be installed at the working location of the pump as much as possible according to the usage situation. Electrical control equipment should be equipped with control switch protection devices corresponding to the conveying medium to ensure safety.
7. For multi combination pumps (plunger or diaphragm) with the same base and specifications, the piping should be arranged according to the process pressure level, starting from the motor as the basic point, and the pressure should be arranged in descending order; For combinations of different machine bases and specifications, they have been installed from large to small, and users only need to connect the pipes.