Pirate Brand Pressure Hold Blast Pots

Browse our inventory of Pirate Brand blast pots used for abrasive blasting. Pirate Brand Abrasive Blasting provides high quality sandblasting equipment and parts that are used to remove surface coatings, clean rust and grease, and prepare surfaces for paint and coatings.

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How Pressure Hold Systems Work

ADDING ABRASIVE
Abrasive is added through the hole in the top of the Abrasive Blaster where the Pop-up and its seat are located. When abrasive is added, it flows down through the hole, around the Pop-up and, down to the bottom of the pressure vessel where it will exit through the Metering Valve when blasting is started.
PRESSURIZATION

Before pressurization can take place in a pressure hold system, the Blow-down Valve must be closed. Then, when a compressed air source (such as an air-compressor) is connected to the inlet of the Abrasive Blaster and the Inlet Valve is opened, compressed air can flow through the Moisture Separator and into the pressure vessel causing the Pop-up (located internally) to seal against its seat allowing the pressure vessel to become pressurized. When the control handle is activated, the Auto Air Valve and Metering Valve open allowing compressed air & abrasive to flow and mix. The mixture of compressed air and abrasive will now exit the Abrasive Blaster through a blast hose and nozzle connected to the coupling on the Metering Valve and blasting begins.

DEPRESSURIZATION (BLOW-DOWN)
When the control handle is released in a pressure hold (SPH) system, the pressure vessel remains filled with compressed air. The compressed air remaining in the pressure vessel is released when the inlet valve is manually closed and the blow-down valve is manually opened.

Strengths

• Reduced abrasive consumption
• Reduces moisture problems
• Smoother starts & stops
• Heavy Duty Filtered Control Valve reduces stopping time when control handle is released
• Included Blow Down Muffler reduces unnecessary loud noise
• Abrasive cut-off option for high velocity blow off

Common Applications

• One-shot premium media blasting
• Corn cob blasting
• Precision blasting applications
• Short blast cycles

Pressure Release vs. Pressure Hold

Release- Automatically blows down vessel when control handle is released.
• Commonly used in blast room applications where an overhead hopper will automatically fill the blaster when it blows down.
• Good choice for first time blasters & rental houses.

Hold- Stays pressurized until manually blown down.
• Reduces abrasive consumption • Reduces moisture problems
• Smoother starts & stops • Stands up to short blast cycles
• Commonly used in one-shot media blasting, corn cob blasting, precision blasting applications & when short blasting cycles.