Pirate Brand Pressure Release 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.

Our experts are standing by to help you select the right product for your application. With more than 30 years of industry experience Total Finishing SUPPLIES has the right expertise. Please call or text us at 503-545-3176 with any questions. We're on standby to help!

How Pressure Release 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
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 flows through the Moisture Separator and reaches the Combination Valve where it is stopped. When the control handle is activated, the Combination Valve pinches the Blow-down Hose and air flows through the Combination Valve into the pressure vessel causing the Pop-up (located internally) to seal against its seat. The pressure vessel is now sealed and pressurized. Air will also continue past the Choke Valve to the Metering Valve where it is mixed with abrasive. The mixture of compressed air will now exit the Abrasive Blaster through a blast hose and nozzle connected to the coupling on the Metering Valve and blasting begins. It is important to note that in SPR abrasive blasters equipped with MPV Metering Valves, some abrasive will collect at the base of the valve causing the blast hose to pulsate and spray abrasive erratically for a short time when blasting is started. This is normal and will not hurt the Abrasive Blaster.
DEPRESSURIZATION (BLOW-DOWN)
When the control handle is released in a pressure release (SPR) system, the Combination Valve automatically closes stopping the flow of compressed air and releasing the Blow-down Hose. The compressed air remaining in the pressure vessel is released through the Blow-down Hose and blasting ends.

Strengths

• Automatically blows down vessel when control handle is released
• Low maintenance design
• Simple troubleshooting for in field repairs
• Manual Plunger Valve is a simple reliable design that provides a wide range of adjustment of abrasive flow to the nozzle
• Great for eliminating premature blow down failure that is common with other manufacturers

Common Applications

• Stationary blasters for blast rooms
• Great starter blaster for first-timers
• A favorite of rental houses
• Use when automatically filling from an overhead hopper

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.