BNP
®
55 SUCTION BLAST CABINET
Page 15
© 2019 CLEMCO INDUSTRIES CORP.
www.clemcoindustries.com
Manual No. 23350, Rev G, 02/19
5.6.3
If a manometer is not available, use the gloves
as an indicator. With the exhauster ON, the gloves
should be inflated but not elevated off the grate.
5.7
Door Interlocks ‒ Figure 18
WARNING
Never attempt to override the interlock system.
Doing so can result in serious injury from
unexpected blasting.
5.7.1
The door interlocks disable the blasting control
circuit when the doors are open. To enable blasting, the
door-interlock switches must be engaged when the
doors are closed. The interlocks are set at the factory
and do not normally require field adjustment unless
parts are replaced. When adjustment is required,
proceed as follows.
5.7.2
Close cabinet doors.
Figure 18
5.7.3
Loosen the actuator bracket screws and adjusting
screw nut. Move the actuator bracket up or down, and the
adjusting screw sideways, to center the adjusting screw
on the over-travel stop. Tighten the bracket screws.
5.7.4
Turn the adjusting screw in or out as required to
engage the switch without applying excessive pressure
on it. Tighten the adjusting screw nuts.
5.7.5
Test the operation with the doors open and then
closed. Negative pressure inside the cabinet may cause
the doors to flex inward. Tests should be performed with
the exhauster running. Point the nozzle away from the
door during the tests and open the door only enough to
disengage the interlock switch. The interlocks should
stop the blasting when either door is opened and permit
blasting when the doors are closed.
5.8
Optional Manometer
These instructions show several methods of taking
static-pressure readings (negative pressure) on
reclaimers by using a flexible-tube manometer. Use the
method best suited for the application. The instructions
explain the processes for taking periodic readings and
show how to permanently install the manometer for
taking frequent readings. A fitting should be installed when
the manometer installation is permanent, per Paragraph
5.8.6.3. Use silicone or other sealant around the fitting to
prevent leaks. The fitting should be capable of being
capped when the manometer tube is removed. A cap
will prevent leaks that alter the reclaimer’s separation
efficiency. Taking readings at different locations could
produce different readings. Static-pressure readings at
the door are generally 0.5" to 1" lower than readings
taken above the reclaimer. The readings are reference
points, so readings should be taken using the same
method each time a reading is taken.
5.8.1
Refer to instructions packed with the manometer
for preparing and operating the manometer.
5.8.2
Connect one end of the 3/16" ID tubing to one of
the tubing connectors (elbows) at the top of the
manometer by pushing it over the barbed adaptor.
5.8.3
Leave the needle protector on the needle and
insert the needle into the other end of the tubing. The
ends of the tubing must fit tight on the manometer and
needle; leaks will cause inaccurate readings.
5.8.4
Open both manometer valves (elbows), per
manometer instructions.
5.8.5
Magnets on the manometer hold it in position on
the reclaimer or dust-collector body. The manometer
must be vertical so the fluid is level on both sides.
5.8.6
Needle placement:
Figure 19 shows the
manometer setup for taking both periodic and frequent
static-pressure readings.
5.8.6.1
Taking readings in the flex hose:
Remove the
needle protector and insert the needle into the flex hose,
approximately 8" above the top of the reclaimer.
Cabinet Door
Detent Sleeve
Over-Travel Stop
Loosen nut and move adjusting
screw sideways to center the
screw on the over-travel stop.
Adjusting Screw Nut
Loosen the bracket screws and
move the bracket up or down to
center the adjusting screw on the
over-travel stop.
Actuator Adjusting Bracket
Bracket Screws
Adjust the screw to push the
valve stem (over-travel stop)
in when door is closed.
Adjusting Screw
