This week, we customized a dual-plunger grout pump station for a client in Vietnam, integrating two duplex plunger grout pumps onto a single skid base. The design addresses the client's site layout requirements by centralizing the pump units, thereby facilitating equipment transport, on-site positioning, and connection to the grouting preparation system.

For grouting projects, equipment selection must consider not only pressure and flow rate but also grout characteristics, conveying distance, and construction methodology. This integrated dual-pump solution combines the individual pump's capacity with an optimized station layout, allowing for the precise determination of piping connections and control configurations based on specific project needs.

The hydraulic duplex plunger grout pump utilizes a hydraulically driven, positive-displacement mechanism, achieving grout intake and discharge through the reciprocating motion of the plungers. Both pressure and flow rate are adjustable to meet construction requirements, making the unit ideal for cement-based grouting operations that demand precise control over the injection process.

The reference output range for a single pump unit is 0–90 L/min, with a pressure range of 0–100 bar. The actual output of the dual-pump station depends on the operating mode, piping layout, and working pressure; the maximum flow rates of the individual pumps cannot simply be summed to determine the total capacity for all operating conditions.

Fully hydraulic duplex plunger grout pump features:

1. Centralized dual-pump layout for easy installation

Sharing a common skid base reduces the layout complexity associated with separate pump placement. The station design allows for the integrated planning of operating space, maintenance access, and piping routes, ensuring the equipment configuration aligns well with the construction site.

2. Adjustable pressure and flow to match grouting stages

Formation grout absorption rates may fluctuate during the grouting process. The adjustable hydraulic pump allows operators to modify delivery parameters based on the construction plan, pressure changes, and injection volume, balancing injection efficiency with process control.

3. Delivery configuration based on grout characteristics

The reference single-pump model utilizes a ball valve structure with a maximum permissible particle size of 8 mm. Actual selection requires a comprehensive assessment of particle gradation, sand content, grout viscosity, and setting time. For applications involving two-component grouting (e.g., cement and sodium silicate), specific requirements regarding separate delivery lines, mixing points, and flushing procedures must be confirmed.

4. Balancing Continuous Operation with Routine Maintenance

The alternating action of dual plungers enables continuous delivery, though the switching process may still cause flow and pressure pulsations. Proper piping configuration, slurry supply management, and routine cleaning/maintenance help ensure stable operation and minimize the impact of slurry sedimentation or hardening on the equipment.

Applicable Engineering Fields of Plunger Cement Grout Pumps:

1. Tunneling and Underground Engineering: Used for engineered ground reinforcement, back-filling behind linings, and seepage control; equipment specifications must align with the slurry formula and permissible grouting pressures.

2.Foundation and Piling Engineering: Used for ground improvement and post-grouting at pile bases; injection pressure, flow rate, and termination criteria are determined based on subsurface conditions.

3. Slope Stabilization and Anchoring: Supplies cement grout for anchor rod and cable holes; operating parameters are selected based on hole depth, delivery distance, and slurry specifications.

4. Water Conservancy and Rock Mass Grouting: Used for curtain grouting and consolidation grouting under suitable conditions; the ability of the slurry to penetrate fine fissures depends on fissure characteristics, material fineness, and the mix formula, rather than pump pressure alone.

Gaode Equipment is a professional manufacturer and supplier of grouting equipment, offering dual-plunger grout pumps and integrated pumping station solutions tailored to project needs. If you are looking for a duplex plunger grout pump, please contact us with details regarding the slurry type, required flow rate, working pressure, and site layout requirements to receive configuration recommendations and a quotation. Email address: info@gaodetec.com

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