Häny ZMP 820 pump

The Häny ZMP series consists of low-wear piston pumps for grouting and conveying cement-based suspensions, microcement, bentonite and mortar. The pumps have a very simple design with only one seal in contact with the medium, and the piston diameter can be changed so that the same pump can be adapted to different combinations of flow and pressure. Valve balls and reversible valve seats in high-strength material give a very low-wear valve design that is optimised for access during cleaning and maintenance. Thanks to the large openings, suspensions with a low w/c ratio and high sand content can also be pumped without problems.

All ZMP pumps have hydraulic pressure and flow control: the maximum grouting pressure can be limited and the flow adjusted, and when the set pressure is reached, delivery stops while the pressure is held. The return stroke is twice as fast as the working stroke, which prevents deposits in the suction valve, and standard gravity valves let through aggregate up to 8 mm while also being easy to clean. The series covers pressures from 1 to 100 bar, is used for both high- and low-pressure grouting, and is supplied as single-, double- and triple-acting units. A recording system for pressure and flow is available as optional equipment.

The ZMP 820 is no longer part of Häny's current product range, which today comprises the ZMP 610/611/625, the ZMP 710/712/725/726 and the ZMP 936 triplex pump. Häny shows the ZMP 820 in two used mixing and grouting platforms from 2004, where each platform consists of an HCM 600 mixer, an HRW 800 agitator and four ZMP 820 pumps. Model-specific data for the ZMP 820 should be confirmed with the manufacturer.