Schmidt AmphiBlast 120 Operation And Maintenance Manual Download

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5.1

Closure (abrasive inlet)

The blaster is filled with abrasive through the closure abrasive inlet at the top of the pressure
vessel. The closure is a manually operated 10” hinged opening that is opened only when the
blast vessel is depressurized. Refer to Section 6.2 for depressurization procedure. The closure is
opened and closed by following the procedures detailed in Sections 6.3 and 6.4.

Note:

Bulk Abrasive Blasters manufactured after January 2010 are equipped with the Halok®

System (#6) that guides the operator through the proper opening procedure. See Sections 6.2
and 9.13.

The closure is part of a Pressurized Vessel. Propelled objects will cause serious injury or death.
Depressurize vessel before opening closure. See Section 6.2.

5.2

Air Supply Connection

Air is supplied to the abrasive blaster through a hose connection at the air inlet. The air supply
hose connected to the abrasive blaster must be the same diameter as the air supply piping and
rated at a minimum of 150 psi operating pressure. See the drawings and parts lists in Section
9.0 and refer to Sections 3.4 and 5.14.

5.3

Air Inlet Ball Valve (pressurize)

The air inlet ball valve (#3) is used to turn on and turn off the air flow to the abrasive blaster.
Air enters the blaster through a hose connection at the air inlet ball valve (#3). The air then
passes through the moisture separator (#7) and into the blast vessel (#1). When the air inlet ball
valve is opened the air flow will pressurize the blast vessel (#1 & #7).

Note:

Units manufactured after November 2013 include a lockout feature on the inlet ball valve

to stop air flow into the bulk abrasive blaster. Then depressurize per Section 6.2 to disable.

5.4

Moisture Separator (optional)

Air flow into the blaster passes through the moisture separator (#7) which removes moisture, oil
and dirt particles from the inlet air. The water that is removed by the separator is drained by
opening the ball valve (#8) at the bottom of the separator. This ball valve should be left slightly
opened anytime the blaster is in operation. This allows water to be drained as it is filtered from
the blast air.

5.5

Blowdown Ball Valve (depressurize)

The  blowdown  ball  valve  (#4)  is  used  to  release  all  the  compressed  air  (depressurize)  from
inside  the  abrasive  blaster.  The  abrasive  blaster  must  be  depressurized  before  filling  with
abrasive  or  before  performing  any  maintenance.  The  air  inlet  ball  valve  (#3)  must  be  closed
before depressurizing the abrasive blaster.

Note:

Bulk Abrasive Blasters manufactured after January 2010 are equipped with the CEN

Exhaust System. The CEN nozzle (#30) controls the exhaust air flow and minimizes freezing of
the blowdown ball valve (#4). The system also includes a muffler to reduce the noise level of
the exhaust air.

Airborne particles and loud noise hazards from blowdown exhaust air can cause serious injury
and loss of hearing. Wear approved eye and ear protection. Stay clear of blowdown air path.
DO NOT place hands or other body parts in the blowdown air path. Make sure no personnel are
in the blowdown air path.