Mod-U-Blast MBM Series - How MBM-Series Systems Work (APV T-Valve & APV II)

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MBM-Series Owner’s Manual

How MBM-Series Systems Work Pressure Hold with APV T-Valve & APV II

Warning: This section of the manual is designed to give you a general understanding of how the

Abrasive Blaster functions. ALL sections of this manual must be read and understood before operat-

ing the equipment.

ADDING ABRASIVE

Abrasive is added through the hole in the top of the blaster

where the pop-up and seal are located. It ows down through

the hole, around the pop-up, and down the bottom of the

pressure vessel where it exits through the metering valve.

PRESSURIZATION

Before pressurization can take place in a pressure hold system,

the blow down valve must be closed. Then, when a com-

pressed air source (such as an air-compressor) is connected to

the inlet of the Abrasive blaster and the inlet valve is opened,

compressed air ows and into the pressure vessel causing the

Pop-Up (located internally) to seal against its seat allowing

the pressure vessel to become pressurized. When the control

handle is activated, the Auto Air Valve and Metering Valve

open allowing compressed air and abrasive to ow and mix.

The mixture of compressed air will now exit the Abrasive Blaster

through a blast hose and nozzle connected to the coupling on

the metering valve and blasting begins.

DEPRESSURIZATION (Blow - Down)

When the control handle is released in a pressure hold system,

(MBM Blast Pots with T-Valves) the pressure vessel remains lled

with compressed air. The compressed air remaining in the pres-

sure vessel is released when the inlet valve is manually closed

and the blow-down valve is manually opened.

Loaded Abrasive

Compressed

Air Inlet

Exhausted

Air