Screw-type vs. Plunger-type Mortar Spraying Machines: What's the Difference and How to Choose the Right Equipment?

Screw-Type Mortar Spraying Machine: Continuous Delivery, Ideal for Fine Finishing Work

A screw-type mortar spraying machine relies primarily on a rotor and stator forming a continuous sealed cavity, with the screw rotating to convey the mortar steadily forward. Its biggest characteristic is continuous output with minimal pulsation, making the spraying process relatively stable. This makes it suitable for ordinary cement mortar, mixed mortar, thermal-insulation mortar, and some decorative materials. Published product literature also shows that screw pumps are typically better suited to medium-to-low-flow, continuous-delivery applications.

Screw-type equipment is usually compact in structure and easy to operate, making it especially suitable for plastering interior and exterior walls of residential buildings, local repairs, and thermal-insulation layer installation. However, because the rotor and stator are wear parts, material particle size, viscosity, and mix ratio all affect pumping performance, so the selection must be based on the actual mortar formulation.

Twin-Cylinder Plunger Type: Higher Pressure, Better Suited to Long-Distance Delivery

A plunger-type mortar spraying machine generates pressure through the reciprocating motion of the plunger. Among these, the biggest advantage of the twin-cylinder design is that the two pump cylinders work alternately: while one draws in material, the other pumps it out, allowing the mortar to be delivered continuously. Compared with single-cylinder designs, the twin-cylinder configuration reduces material interruption and improves continuous construction capability.

Twin-cylinder plunger machines can achieve higher pressure and longer-distance delivery and can handle ordinary cement mortar, coarse-sand mortar, and some high-viscosity materials, making them better suited to large-area projects such as high-rise buildings, factories, tunnels, and slope protection works.

So there is no simple "which is better" between the two types. If a project prioritizes continuous, stable spraying and equipment flexibility, screw-type machines have a clear advantage; if a project needs greater delivery capacity, higher pressure, or longer distance, the twin-cylinder plunger type deserves the most consideration.

For professional construction teams, choosing a mortar spraying machine should not be based only on price and theoretical flow rate. More importantly, it requires considering the material type, particle size, delivery distance, construction area, and on-site power supply conditions. Anke High-Tech Research Institute continues to focus on the mechanized and intelligent application of construction equipment and can provide corresponding mortar spraying equipment solutions for different construction environments, helping customers achieve an integrated match from equipment selection and material adaptation to construction application—so that mechanized spraying truly serves more efficient and more stable construction.