4
MANUAL - SANDBLASTERS - U100-U103
Revised 2018-12
PREPARATION
IMPORTANT: OPERATOR SHOULD WEAR PROTECTIVE CLOTHING
Note: Item numbers given below refer to the parts listing on page 4.
1. On removal of sandblaster from carton, check for any transportation damage and make sure all parts
and accessories are included.
2. Make sure the Air Shut Off Valve (Item 8) is closed.
3. Make sure the Sand Flow Control Valve Item 11) is closed (handle in horizontal position).
4. Make sure the Nozzle End Shut Off Valve at the end of the Blast Hose is closed.
5 The choice of nozzle size is limited by the CFM air capacity of the compressor. For fast cutting or
cleaning, the nozzle should be no larger than necessary to permit the compressor to maintain 80
pounds of pressure when blowing continuously. Thus, 1/8” nozzles are supplied as standard parts for
the ½” sand hoses. This hose can be used for sand, steel grit and shot.
6. All sand should be dry and uniformly graded to about #30 screen size for use with 1/8”, 3/32’ or 7/64”
nozzles. With larger nozzles, coarser grade grit, shot or beads may be used.
7. TO FILL THE SANDBLASTER – Make sure the Sand Flow Control Valve (Item 11) is closed, then:
a) Remove Filler Valve (Item 4) to make fi lling easier
b) Fill the tank from the top, making sure the abrasive is dry and running freely
c) Connect the air hose to the Air Shut Off Valve (Item 8)
d) Replace the Filler Valve and hold in place while you open the air valve and allow the tank to fully pres-
surize (about 20-30 seconds). The air pressure will then hold the Valve in place.
OPERATING INSTRUCTIONS
1. WHEN YOU ARE READY TO SAND BLAST: Open the Nozzle End Shut Off Valve at end of the Blast
Hose, then gradually open the Sand Flow Control Valve (Item 11). The valve fi rst passes air only, then
increasing amounts of sand. When you have enough sand for the desired cutting eff ect, operate with the
Nozzle End Shut Off Valve if one is supplied. This valve is not for mixing and should be used either wide
open or closed. NOTE: You can tell when a good operating level has been reached by the cutting eff ect of
the abrasive when it hits the surface and by the “feeling” of the abrasive rebound force.
2. TO RELIEVE PRESSURE IN THE TANK: To refi ll or change nozzles etc, shut off the Air Shut Off Valve
(Item 8). Open the Pressure Relief Valve (10-251F) by inserting a fi nger into the ring and pulling down-
ward. IMPORTANT: It is recommended that the pressure be relieved whenever the unit is not being used
because air held in the tank under pressure can cause moisture condensation which can clog the sand
control valve. If the valve does get clogged, open the square-headed Drain Plug (Item 13) or the Filler
Valve and agitate the abrasive with a rod or wire.
3. TO EMPTY THE SANDBLASTER: Relieve the pressure as above, remove the Filler Valve (Item 4) and
open the Sand Control Valve (Item 11). Then remove the square-headed Drain Plug (Item 13) from the
bottom of the tank to drain the abrasive. NOTE: With the Filler Valve removed, abrasive may be vacu-
umed out through the top of the tank.
