AXXIOM Manufacturing, Inc. SCHMIDT, Руководство по эксплуатации и обслуживанию

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© 2013 Axxiom Manufacturing, Inc.
5.4 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: The Mini blaster will automatically pressurize when the air inlet ball valve (#1) is
opened. The blaster must be manually depressurized thereafter. See Section 5.3 and 6.2.
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.
5.5 Choke Valve
The choke valve (#13) is used to clear any trash that may get into the blast vessel and block the
Thompson Valve
®
orifice. Whenever trash (paint chips, cigarette butts, etc.) blocks the
Thompson Valve orifice the procedure is to fully open the Thompson Valve by backing out the
knob, then press down the deadman lever (#12) to begin blasting. While blasting, have an
assistant close the choke valve completely for about one second. This creates differential
pressure at the Thompson Valve (high pressure above; low pressure below). The higher
pressure from the blast vessel should be enough to force the trash through the Thompson Valve
orifice. Keep the choke valve fully open at all other times while blasting to minimize excess
Thompson Valve wear.
Do not aim blast nozzle towards yourself or any person. System malfunction can cause
accidental start up and result in injury to personnel.
A secondary purpose of the choke valve is as a manual shut off valve for the blast air supply.
When the choke valve (#13) is closed it will shut off the blast air supply to the blast outlet.
5.6 Automatic Air Valve (blast air valve)
The automatic air valve (#9) is a normally closed valve that opens to supply blast air to the blast
hose (#10) and blast nozzle (#11). The automatic air valve (#9) opens when it receives air to its
signal port. This happens when the deadman lever (#12) is pressed down which sends an air
signal to the automatic air valve. When the deadman lever is released, the air signal in the
control line vents and the automatic air valve spring closes to stop blast air flow to the blast
hose and nozzle. See Section 9.3.
Note: An optional automatic air valve is the High Flow model which offers increased air flow
capacity for larger blast nozzles. Consult Axxiom Manufacturing or an authorized distributor.