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Carefully read and follow all the recommendations regarding the abrasive blast system installation
requirements. Improper installation can result in equipment malfunction and significant lost time
expenses.

Consult an authorized Schmidt® distributor or Axxiom Manufacturing, Inc.

3.1 Abrasive Blast System Installation Location

i. Portable

units:

Units equipped with handles and wheels are portable and can be rolled to

locations  where  blast  jobs  are  performed.  Locate  the  unit  to  allow  accessibility  to  the
handway and for ease of abrasive filling.  Pay close attention to objects that may be in the
path  of  the  pressure  vessel  exhaust  air  (depressurization).  See  Section  5.4  for  system
depressurization.

ii. Stationary units

: Units that will be installed in permanent locations require careful

consideration.  Stationary  units  can  be  installed  below  an  abrasive  hopper  with  a  support
structure that can limit access to the abrasive blast system. Install stationary blast systems in
a position that will allow access to the handway and the blaster piping. These areas must be
accessible to perform required maintenance. Pay close attention to objects that may be in the
path  of  the  pressure  vessel  exhaust  air  (depressurization).  See  Section  5.4  for  system
depressurization.  An  exhaust  hose  assembly  can  be  installed  on  TVII  Blast  Systems  to
direct  the  exhaust  air  into  the  blast  room.

Note:

A long blowdown exhaust hose can

lengthen the blowdown time and also presents the possibility of blockage.

iii

. Abrasive blasters 3.5cf and larger are provided with mounting holes in the bottom legs.

These holes can be used for securing the blaster to the floor or mounting structure.

3.2 Compressed Air Requirements (blast nozzle)

The blast nozzle size and blast pressure determine the compressed air requirements. Available
air flow capacity and/or air compressor size must be considered before selecting the blast
nozzle size. An air source dedicated to the abrasive blast system is preferred to reduce system
pressure drops and back flow of air. If an existing air compressor will be used or a limited air
supply is available, then the blast nozzle must be selected based on these conditions. Be aware
that as the blast nozzle wears the air demand will increase. See Table 1 in Section 13.0 for air
consumption by nozzle size at various pressures.

Note:

10cf and 20cf units can be upgraded to

two blast outlets and therefore, this option should be considered when determining compressed
air requirements.

3.3 Air Compressor Size

Air compressor size is crucial to the operation of the abrasive blast system. Blast nozzle
selection and desired productivity must be evaluated to determine the air flow requirements
prior to selecting the air compressor size. Sufficient air supply capacity is necessary to maintain
the system air pressure. Insufficient air flow capacity will result in reduced blast nozzle pressure
and lost productivity. The air compressor must be large enough to supply:

The sum of blast air requirements for each nozzle at the highest pressure that will be
used (see Section 13.0, Table 1).

ii.

The 12 CFM breathing air supplied to each blast operator respirator.

Note

: Reference

OSHA regulations regarding requirements for breathing air, especially when an oil-
lubricated air compressor is used.

3.0 Installation Requirements and Personnel Protective Equipment