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Machines & equipment for sale

Schmidt Mfg Inc / Axxiom Armex SX12 Accustrip Soda Blast Pot

Used / Second Hand

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In stock now
From a working environment, Excellent Condition, Ex demonstration
Stock No
Schmidt Mfg Inc / Axxiom
Year of Manufacture
From a working environment, Excellent Condition, Ex demonstration
Work Envelope (WxDxH mm)
57 litres capacity
Other Info
Ex Demo Soda Blasting Machine
Our Central Warehouse, Aldridge, UK
Weight (kgs)
External Dimensions (WxDxH mm)
635 x 635 x 1525


Schmidt Accustrip SX12  

The SX12 model Accustrip refers to an air driven abrasive portable blasting machine, specifically designed for delivery of sodium bicarbonate blast media. 

This high quality machine formed part of the demonstration and testing facility at Walther Trowal UK’s Surface Technology Centre. As such this machine is in great condition. Riley Surface World staff have seen this machine working in a well maintained and serviced environment, prior to professional de-commissioning.

The SX line of Accustrips are designed for multi-purpose use and have specific features which differentiate them from other machines. The primary difference is a single regulator control system, (as opposed to dual regulator units) large piping, and Media Valve, features which enhance reliability, performance and ergonomics.

Process description

Air enters the SX System through the inlet air filter. Opening the inlet air valve allows air to pass through the blast pressure regulator and enter the media tank. As the tank pressurises, the pop-up valve is lifted to seal the media loading area containing air within the tank causing it to pressurize.

Resulting tank pressure is set by the blast pressure regulator.  Once the deadman valve is pressed, control air activates the automatic air valve and media valve causing them to open allowing blast air and media to mix at the media valve and exit the system through the blast nozzle. Releasing the deadman valve returns the media valve and automatic air valve to the closed position stopping the blasting action.


  • Versatile system used for general maintenance, cleaning, degreasing, graffiti removal, depainting and other surface preparation
  • Gentle but effective process safe for use on virtually any surface: brick, limestone, concrete, granite, metal, glass and tiles
  • Uses Baking Soda which is nontoxic, nonhazardous* and nonsparking media
  • Streamlined piping provides more efficient air usage and ease of maintenance
  • Moisture separator, moisture eliminator and water trap pop-up valve keep blast media flowing smoothly. Optional AirPrep system (air dryer or aftercooler) available
  • 45º cone provides optimum media flow
  • Gauge console allows for easy monitoring of all blast parameters

Process controls

Blast pressure is controlled by the blast pressure regulator with operating pressures ranging from 10 psi to approximately 120 psi. Ideal blast pressure is determined by application requirements or available air volume.

Media flow is controlled by a coarse adjustment media orifice contained within the media valve and a fine adjustment media flow control valve. Once an orifice size has been selected, the media flow control valve can be adjusted to deliver media at a rate of 100 grams to approximately 3.5kg/min. Media flow is increased by closing the media flow control valve slightly to create and air flow restriction in the blast air piping resulting in a head pressure within the tank.

Head pressure (differential pressure) assists media flow from the tank through the orifice in the media valve where it is mixed with the blast air stream. An optional differential pressure indicator gauge is available to allow repeatable and consistent media flow adjustment.

Deadman control circuit

Air pressure exists in the deadman supply hose whenever the inlet air valve is open and the blast hose harness in connected. When the deadman valve is pressed and maintained, air travels from the deadman supply hose through the 

deadman valve and back through the deadman return hose to the actuator side of the control valve causing the internal control valve spool to slide (turn on).

Air pressure existing at port 1 of the control valve is then allowed to exit the control valve at port 4. Air pressure from port 4 pressurizes the diaphragm in the automatic air valve causing it to open and also opens the piston actuator on the media valve. Simultaneously, air pressure in the return (close) side of the media valve actuator is allowed to vent from the control valve at port 2 through port 3 allowing the media valve to open.

When the deadman valve is released, air pressure in the deadman return hose (black hose) is vented through the deadman valve relieving pressure on the control valve actuator causing the internal control valve spool to slide closed (off). With the control valve in the off position, air pressure at port 4 holding the automatic air valve and media valves open is vented through port 5 causing the automatic air valve to spring return closed (turn off).

Simultaneously, air pressure existing at port 1 is allowed to pressurize the media valve piston actuator on the closed side from port 2 causing the media valve to turn off (spring assisted).

Media cut off control circuit

The media cut off option separates control of the automatic air valve and media valve requiring a separate switch and control valve to operate each function.

The deadman valve operates only the automatic air valve turning blast air on or off. A separate media cut off switch and control valve operate the media valve turning it on or off. The media cut off switch is interlocked to operate the media valve only when the deadman valve is actuated.

Dust suppression system

Water can be added at the nozzle to suppress dust generated from blasting. The unit does not provide a water pump, so only nozzles utilizing utility pressure water supplies (30 to 100psi) for dust suppression can be used. Water supply to the dust suppression device can be throttled using a petcock valve near the nozzle.

SX12 specification 

  • Model 12SX
  • Capacity litres 57
  • Dry Weight 122 kg
  • Approx.  Run Capacity 2 hr.
  • Media Capacity: 45 kg.
  • Piping System: 1 1/2" diameter
  • Blast Pressure: 30-90 psi typical
  • Dimensions: 635 L x 635 W x 1525 mm H


Walther Trowal Support

Walther Trowal

This machine formed part of the demonstration and testing facility at Walther Trowal UK’s Surface Technology Centre. Walther Trowal is a world leader in surface preparation technology.

Riley Surface World staff have seen this machine working in a well maintained and serviced environment, prior to professional de-commissioning.

Walther Trowal UK is available to provide technical information, engineering / service support, process trials and processing advice, finishing media, compounds / chemicals and spare parts, details on request.

pdf icon Print / Download Schmidt Mfg Inc / Axxiom Armex SX12 Accustrip Soda Blast Pot Datasheet

Additional files

Photographs taken prior refurbishment. Our refurbishment service is not available on all machines.