LGM90/100PLD-E high-pressure hydraulic grout pump features a dual-plunger (dual-cylinder) design, hydraulically driven to simultaneously or separately deliver two different slurries. This hydraulic grout pump mainly consists of an electric motor, a double-plunger pump (or gear pump), an overflow valve, a hydraulic directional valve block, hydraulic cylinders, a working cylinder, a mixer, and an electrical control box.



Working principle of LGM90/100PLD-E High pressure hydraulic grout pump:
The electric motor directly drives the pump to generate high-pressure hydraulic fluid, which flows through the overflow valve into the hydraulic directional valve block. The valve block controls the reciprocating motion of the hydraulic cylinders. Since the hydraulic cylinders and working cylinders move synchronously and have the same diameter and stroke, the displacement and pressure of the working cylinders are essentially similar to those of the hydraulic cylinders. Each end of the working cylinder has an independent suction valve and discharge valve, allowing the dual-cylinder pump to both suction and discharge the same slurry or two different slurries separately. The two slurries are finally mixed by the mixer and injected into the target location.
This high-pressure hydraulic plunger grout pump is widely used in engineering scenarios requiring seepage prevention, leak sealing, and consolidation of rock strata and soil, primarily including:
1. Mining and Shaft Construction: Pre-grouting for water sealing in coal mine working faces, grouting for leak sealing in rock tunnels and concrete shafts, high-pressure water injection into coal face walls, etc.
2. Tunneling and Subway Construction: Two-component tunnel grouting, subway tunnel grouting, pipe jacking grouting, and post-grouting (opening grouting), etc.
3. Foundations and Building Construction: High-pressure grouting projects for foundation treatment and settlement, ground subsidence, slope anchoring, high-rise building foundation treatment, and basement waterproofing and leak sealing.

LGM90/100PLD-E high-pressure hydraulic grout pump main applications: Tunneling: Face pre-grouting, waterproofing, rock consolidation
Mining: Coal seam grouting, roof bolt support
Foundation: Dam body grouting, pile base treatment
Construction: Crack sealing, basement waterproofing, grouting under pressure
Infrastructure: Bridges, high-rise buildings, subway stations

1. Hydraulic drive safely releases pressure when the pumping block;
2. Ball valve, up to 8mm particle size;
3. Stainless steel frame electric box with waterproof button;
4. Compared to the piston pump system, the plunger system does not require or tolerate components such as cylinders or precise piston seals. The plunger is sealed by a simple, maintenance-free
seal.