Mortar Sprayer Model Comparison: 311, 318, 417, 511, 711, 711X, 850 and M-11 Compared

Eight machines, four questions: how much surface do you cover, how high do you need to push material, what power do you have, and how will you feed the hopper. The table below lists the real specifications of our mortar spraying range so you can shortlist without opening eight separate pages.

Specification comparison

How to read the table

Output ranks the machines, but treat it as a ceiling measured under ideal continuous conditions. Pressure is what actually moves material up and along the hose. Conveying height is the vertical limit — exceed it and you will fight blockages rather than gain speed. Motor power tells you what electrical supply you need. Hopper volume determines refill frequency. Weight determines whether two people can move it.

Which model for which job

• 311 Mortar Spraying Machine — 50 m²/h, 3 MPa, 10 m lift, 150 kg. Small interior jobs, tight access, single-phase supply available.
• 318 Mortar Spraying Machine — 60 m²/h, 4 MPa. A step up where slightly higher pressure is needed without moving to a large machine.
• 417 Mortar Spraying Machine — 80 m²/h. Mid-size contractor work where a compact machine runs out of pace but a 7.5 kW unit is not yet justified.
• 511 Mortar Spraying Machine — 150 m²/h at 7.5 kW. Daily contractor use on walls and ceilings; the most common all-round choice.
• 711 Mortar Spraying Machine — 200 m²/h, 5 MPa, 20 m lift and a 130 L hopper. Large sites with a crew big enough to keep it fed.
• 711X Mortar Spraying Machine — 200 m²/h. The 711 platform with the variations required for heavier continuous duty.
• 850 Double-Speed Mortar Spraying Machine — 150 m²/h (low speed) / 250 m²/h (high speed). Double-speed drive lets you drop output for ceilings and finishing, then raise it for open wall areas.
• M-11 High-Lift Mortar Spraying Machine — 400 m²/h, 6 MPa, 50 m vertical and 100 m horizontal. Multi-storey façades and long hose runs.

Three specification mistakes to avoid

1. Checking height but not distance

Every model quotes a vertical and a horizontal limit. A site that needs 15 m of lift but 40 m of hose from the parking point can exceed the horizontal rating of a machine whose height rating looks sufficient.

2. Ordering the wrong voltage

Several models are offered at 380 V or 220 V. Confirm your supply before ordering — this is the most common cause of a machine arriving and not being usable.

3. Ignoring how the hopper is fed

A high-capacity machine with a small hopper stops often unless you have a mixer discharging into it. Match hopper volume to your supply method: hand-bagged material needs more hopper, or a slower machine.

Not sure between two models?

Send us the surface type, daily square metres, maximum height and available power. We will tell you which of these eight fits and, just as usefully, which ones are more machine than you need.

Standards that apply to the work

The models differ, but the compliance requirement does not: whichever machine you choose, the finished coating has to satisfy the same specification.

• EN 998-1 classifies rendering and plastering mortars by use and declared performance. This matters because a one-coat (OC) product and a general-purpose (GP) product place different demands on a machine's throughput and pressure.
• EN 13914-1 governs preparation and application, including the number of coats and the substrate conditions that must be met before spraying starts. A machine that cannot hold a controlled output will struggle to meet a specified coat thickness consistently.
• EN 1015 is the test-method family for masonry mortar, including the fresh and hardened mortar tests your supplier's product data sheet will quote against.
• ASTM C926 is the equivalent application standard used on many North American specifications.

Ask your client which of these their specification names, then match the machine's output and pressure to the coat build-up rather than to the floor area alone.

What goes wrong on site

• Under-specifying pressure to save cost. The symptom is not a slow machine — it is repeated blockage at height. If a job is near the conveying limit, choose the next model up rather than relying on a thinner mix to compensate.
• Choosing a hopper too small for the crew. A large-capacity machine with a small hopper spends its time waiting to be filled. If material arrives by the bag, either size the hopper up or size the machine down.
• Forgetting that weight is a specification. A 550 kg high-lift unit needs a loading plan and floor capacity; a 150 kg compact unit can be carried through a standard doorway. On scattered small sites, portability often beats capacity.
• Buying capacity you cannot feed. The bottleneck is nearly always material supply, not spraying. Pair a high-output machine with a mixer discharging into it, or accept a lower-output model.