diaphragm pump, as its name implies, is to use a piston to drive
hydraulic oil, and then by hydraulic oil to drive the material of the
other side of the diaphragm of the metering pump.
Mechanical diaphragm metering pump is a mechanical drive, a direct role
in the reciprocating movement of the diaphragm, the mechanical force to
drive the diaphragm reciprocating pumping liquid, so the subject to the
diaphragm strength, in general, the use of mechanical diaphragm pump
pressure is no more than 1MPa, some do good may reach 1.2MPa. Hydraulic diaphragm pump can be used in high pressure occasions, 32MPa even above the problem.