PULSAR® III-P/III-PE and VI-P/VI-PE PRESSURE CABINETS Page 5
© 2019 CLEMCO INDUSTRIES CORP. www.clemcoindustries.com Manual No. 21527, Rev. I, 02/19
1.9 Metering Valve Options
1.9.1 Unless specified at the time of purchase,
cabinets are supplied with a fine-mesh Sentinel
Metering Valve. The valve is for use with 50-mesh and
finer media, and #10 and finer glass bead. The optional
Sentinel Metering Valve is recommended when using
media coarser than 50-mesh. Conversions kits listed in
Section 9.1 easily convert the valves.
1.10 HEPA (high-efficiency particulate air) Filter
1.10.1 Optional HEPA afterfilter provides additional
filtration. A HEPA filter must be used when removing
lead coatings, Heavy metals, or any other toxic materials.
HEPA filter is listed in Section 9.1: Optional Accessories.
WARNING
All dust is hazardous to breath. Emissions can
occur from the dust collection system. Identify
all materials that are to be removed by blasting;
if any toxic materials such as lead dust or dust
from other heavy metals and corrosives, or any
other toxic materials are being removed, use a
HEPA afterfilter to assist in maintaining
inhalation hazards below the permissible
exposure limits (PELs). Prolonged exposure to
any dust can result in serious lung disease and
death. Short-term ingestion of toxic materials
can cause serious respiratory injury or death.
Filtration may not be adequate in reducing all
inhalation hazards. It remains the employer’s or
user’s responsibility to ensure all emissions
are safe to breath.
1.11 Blasting Media
Always use media specifically manufactured for blasting
and that are compatible with the surface being blasted.
Media produced for other applications may be inconsistent
in size and shape, contain particles that could jam the
metering valve, or cause irregular wear. Always obtain
the safety data sheet (SDS) for the blasting media prior to
blasting and identify material being removed by blasting,
paying particular attention to worker health risks and
presence of any hazardous/toxic substances.
1.11.1 Most common reusable media specifically
manufactured for blasting can be used in Pulsar®
cabinets. The listing of media sizes shown in this
section and in Figure 2 are provided as a guideline only.
The guideline is based on standard 3/16" nozzle and
average conditions with variables such as blast
pressure, media-air mixture, visibility inside the cabinet,
humidity, and reclaimer cleaning-rate.
Several variables that affect the reclaimer cleaning-rate
include blast pressure, media-air mixture, media
friability, contamination of parts being cleaned, damper
setting (static pressure), and dust-collector filter loading
(differential pressure across the dust filter cartridge).
When using larger nozzles, the maximum mesh size of
media will be smaller than those that are normally
recommended. Using media that is finer than those
recommended may decrease visibility and, at some
point, carry over to the dust collector. Media coarser
than those recommended may be too dense for the
reclaimer to recover from the cabinet hopper.
1.11.2 Sand and slag: Sand should NEVER be used
for abrasive blasting because of the respiratory hazards
associated with media containing free silica. Slags are not
recommended because they rapidly break down and are
not recyclable, making them unsuitable for cabinet use.
1.11.3 Silicon carbide, aluminum oxide, and garnet:
These are the most aggressive of the commonly used
media. Aggressive media may be used, but the service
life of any equipment components exposed to them will be
reduced. To avoid unscheduled downtime, periodically
inspect the reclaimer wear plate, exhauster housing and
paddle wheel, blast hose, and nozzle for wear.
When using aggressive media only occasionally, install
an optional aluminum oxide kit. The kit includes rubber
curtains for the cabinet interior and a boron carbide
lined nozzle. Nozzles lined with boron carbide extend
nozzle wear life. When using these media on a regular
basis, use a fully rubber lined reclaimer in addition to the
oxide kit. Rubber reclaimer liners are shown in Section
9.1: Optional Accessories, Figure 40.
1.11.4 Glass bead: Most beads are treated to ensure
free-flow operation, even in environments of moderately
high humidity. Glass beads subjected to excessive
moisture may be reused only after thorough drying and
breaking up of any clumps.
1.11.5 Steel: When the recovery hose diameter is
suitably sized, as shown in Figure 2, steel grit sized
between 80-mesh and 120-mesh and shot sized between
S-110 and S-70 may be used with a 1/4" or smaller nozzle.
Using steel media requires a smaller-diameter
conveying hose, usually reduced one size from
standard. Conveying hose on cabinets using steel media
should have a smooth durable lining. Rubber curtains
should be used to protect the cabinet walls from peening
and rapid wear. For these applications, cabinets can be
ordered with reduced-size flex hose appropriately sized
for steel grit, and with rubber curtains installed. They may
also be field installed later. See Section 9.1: Optional
Accessories.
