MR-450 Refractory Concrete Repair Machine

MR-450 Refractory Concrete Repair Machine – Available for Sale

The MR-450 is one of the most versatile Refractory concrete repair pumps manufactured by Allentown. It’s ideal for Wet Process Shotcrete in Refractory sprayed concrete applications. The MR-450 has a powerful 30 hp (22kW) electric motor and conveys low slump Refractory concrete and packaged high-performance materials over long distances.

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The MR-450 Refractory Concrete Repair Machine also features its unique 3-inch swing-tube, which cycles in one-tenth of a second to provide smooth flow into the pipeline. This machine’s hopper design insures excellent cylinder fillage and is very easy to clean out through a bottom drop door. The MR-450 is now supplied with the Lincoln Quicklub Automatic Greasing system as standard.


  • Lister LP3W, 3-cylinder, 29 hp (22kW) @ 3,000 rpm, water-cooled diesel engine
  • Remote on-off control pendant with 100′ (30m) cable
  • Chemical dosing pump (mounted)
  • Pressure washer
  • Pneumatic tire (third wheel) on front
  • Four-way forklift frame

Technical Data

Industries: Refractory
Process Type: Wet Process Shotcrete & Sprayed Concrete
Output: 2 – 3 tons/hr (2 – 3 tonnes/hr)
Maximum Material Pressure: 1,750 psi (25,382 bar)
Power: 30 hp (22kW) 3/60/460, TEFC electric motor with 1.15 SF and across-the-line starter
Dimensions: 70″ x 132″ x 53″ (51″ loading height)
Hopper: 11 cu ft (.31m³) with grate and easy cleanout door
Mixer: 10 cu ft (.28 m³) hydraulic paddle-type with hydraulic lift and dump (bottom cleanout door)
Mounting: Trailer with Torq-flex axle and 205/75D15 tires, electric brakes and lights, pintle hook hitch and lifting eyes
Weight: 3,200 lbs (1,451kg)


We’ve put together some useful information on this product available for download

MR-450 Operating Instructions
MR-450 Flyer
MR-450 Parts List

Markham Sheffield Ltd 01909 730861