Positive displacement pumps use a mechanical force such as gears, bladders, pistons, plungers or diaphragms to push liquid through and out of the pump.
Walchem Corporation of Holliston, Massachusetts, is a leading manufacturer of analytical instruments, sensors, and metering pumps. Walchem has the unique ability to integrate its advanced sensing, instrumentation, fluid pumping, and communications technologies to deliver reliable and... (more)