3.5 cu ft K-Series Portable Blast Pot – Electric 12 VDC Pressure Hold System with MPV Metering Valve & #400 Pinch Valve, 1″ Piping with Moisture Separator

3.5 cu ft K-Series Portable Blast Pot – Electric 12 VDC Pressure Hold System with MPV Metering Valve & #400 Pinch Valve, 1″ Piping with Moisture Separator

Part Number: 40-300-MPV-A
Compatible With: KEY HOUSTON #40300
Weight: 439.32 lbs
Warranty: 5-Year Limited / 10-Year Vessel Warranty

Overview

The 3.5 cu ft K-Series Electric (12 VDC) blast pot delivers precise abrasive control and consistent performance in compact form.
Using an MPV Metering Valve and #400 Pinch Valve, it allows wide-range adjustment of abrasive flow and instant on/off air control.
Its Pressure Hold System maintains vessel pressure between trigger cycles—reducing air consumption, moisture build-up, and downtime—making it ideal for professional contractors who require reliability and easy operation in the field.

Key Features & Benefits

A. Pressure Vessel

• 3.5 cu ft (100 L) capacity rated for 150 PSI (10.3 BAR)

• Built to A.S.M.E. Section VIII Division 1 standards

• C.R.N. Certified for all provinces

B. Pressure Hold System

• Vessel remains pressurized when the control handle is released

• Enables smoother starts/stops and reduces air loss

C. Emergency Air Tank

• Supplies backup air to keep the pinch valve closed if compressor fails

• Enhances safety and ensures steady operation

D. Heavy-Duty Moisture Separator

• Removes condensation to prevent clogging and abrasive bridging

E. 1″ Galvanized Piping

• Corrosion-resistant for long-term durability

F. Full-Port Ball Valves

• Heavy-duty design for maximum air flow and minimal pressure drop

G. Schedule 80 Heavy-Duty Nipples

• Thick-wall construction extends wear life in abrasive environments

H. JIC-Fitted Pusher Line

• Eliminates gasket issues and simplifies maintenance

I. MPV Metering Valve / #400 Pinch Valve

• MPV Valve: Manual plunger type offering precise, reliable abrasive adjustment

• #400 Pinch Valve: Controls on/off flow of air and media for responsive blasting

J. Bag-Breaker & Screen

• Prevents foreign debris during abrasive loading

K. Blow-Down Muffler

• Significantly reduces noise during pressure release

L. Improved Electric Connection

• Weather-proof lock-out/tag-out box

• Rubber-sealed plug boot prevents dust and insect intrusion

• More reliable than older electrical connector styles

M. 6″ FAST-FILL™ Pop-Up

• Allows rapid abrasive refill to minimize downtime

Specifications

Applications

• Surface preparation for fabrication shops and contractors

• Rust, paint, and coating removal on metal structures

• Equipment maintenance and refinishing operations

• Industrial projects requiring precise abrasive control

Compatibility

• OEM Replacement For: KEY HOUSTON #40300

• Fully compatible with K-Series Electric #400 Pinch Valve and MPV Metering Valve systems