PULSAR
®
III-P/III-PE and VI-P/VI-PE PRESSURE CABINETS
Page 33
© 2019 CLEMCO INDUSTRIES CORP.
www.clemcoindustries.com
Manual No. 21527, Rev. I, 02/19
Figure 36
8.16.4
Check alignment of pulse-valve cam follower:
With the exhauster running and with blast pressure
adjusted to 0 psi, hold the foot pedal in hand and fully
press the pedal top. The collector should pulse as the
cam follower rides over the lobe on the pedal top when
the pedal is pressed, and again when the pedal is
released, as shown in Figure 36. NOTE: The pedal
should be rapidly pressed and released so the cam
follower quickly rides over the lobe; prolonged
engagement of the pulse valve will lengthen the pulse,
which does not clean the cartridge and wastes
compressed air.
The lobe on the pedal top should press the cam follower
IN to engage the 3-way pulse valve, and disengage the
switch when the pedal is fully pressed and again when
the pedal is released. If the switch is not aligned to
function as described, align as follows:
If the switch does not disengage the pulse when the
cam follower rides off the lobe, the switch assembly
is too close to the lobe. Loosen the two screws on
the bottom of the pedal, slide the switch away from
the lobe as needed, and recheck alignment.
If the switch does not engage the pulse when the
cam follower rides onto the lobe, the switch assembly
is too far from the lobe. Loosen the two screws on the
bottom of the pedal, slide the switch toward the lobe
as needed, and recheck alignment.
When the alignment is set correctly, tighten the screws
to prevent movement.
When the pedal is operating correctly, a spurt of air
should be heard as the cam follower rides off the lobe
when the pedal is pressed and again when it is
released. If the cam follower is working correctly, and
there is no spurt of air when the pedal is pressed and
released, it is likely a problem with the 3-way valve;
replace the 3-way valve.
8.16.5
Check the diaphragm pulse valve and actuator
assembly. Refer to Figure 37.
8.16.5.1
Remove the pilot actuator from the 3-way
pulse valve. With the exhauster running and with blast
pressure adjusted to 0 psi, press in on the 3-way valve
plunger; the cartridge should pulse when the plunger is
pressed and stop when it is released.
If the cartridge does pulse, the diaphragm pulse
valve and 3-way valve are functioning; proceed to
Section 8.16.5.2.
If it does not pulse, listen for a spurt of air coming
from the 3-way exhaust port when the plunger is
pressed.
If it does spurt air, the problem is likely in the
diaphragm pulse valve. Inspect the diaphragm for
wear or damage.
If it does not spurt air, the 3-way valve is not
functioning. Replace the 3-way valve.
Figure 37
Foot Pedal Top
Cam follower rests off
the bottom of the lobe
(no pulse).
Cam follower rests off
the top of the lobe
(no pulse).
Lobe
Cam Follower
Pulse Valve Plunger
3-Way
Pulse Valve
Pedal Base
The lobe pushes cam
follower in, pushing
pulse switch plunger in,
which pulses cartridge.
Roll Pins
Keeps follower upright.
Loosen screws and slide bracket as necessary to
pulse when the follower is on the lobe, and not pulse
when follower is off the lobe (when the pedal is fully
pressed or fully released).
Foot pedal top up in the nonblast position.
Foot pedal top partially pressed down.
Foot pedal top fully pressed down.
Mounting Bracket
Diaphragm Pulse Valve
3-Way Air Valve
Pilot Actuator
Urethane Tubing
Plunger
Bracket Screws
Exhaust Port
(At bottom of valve)
