3.5 cu ft K-Series Portable Sandblast Pot – Pneumatic Pressure Hold System with MPV Metering Valve & #400 Pinch Valve, 1" Piping with Moisture Separator & 55' Twin-Line Control Handle #2

Part Number: 41-300-MPV-A
Compatible With: KEY HOUSTON #40300
Weight: 437.04 lbs
Warranty: 5-Year Limited / 10-Year Vessel Warranty

Overview

The 3.5 cu ft K-Series Portable Sandblast Pot with MPV Metering Valve and #400 Pinch Valve is designed for industrial contractors who demand reliability, efficiency, and control.
Its Pneumatic Pressure Hold System keeps the vessel pressurized between cycles—reducing abrasive waste, improving restart response, and minimizing moisture intrusion.
Compact yet powerful, this unit delivers consistent, high-performance abrasive blasting in both field and shop environments.

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 Canadian provinces

B. Pressure Hold System

• Vessel remains pressurized when control handle is released

• Enables smoother starts and stops than pressure-release systems

• Reduces media consumption and moisture buildup

C. Emergency Air Tank

• Backup reservoir keeps the pinch valve closed if compressor fails or runs out of fuel

• Enhanced safety and operational continuity

D. Heavy-Duty Moisture Separator

• Filters compressed air to protect media from clumping and ensure steady flow

E. 1″ Galvanized Piping

• Corrosion-resistant construction for durability and smooth airflow

F. Heavy-Duty Full-Port Ball Valves

• Maximizes air delivery while maintaining pressure stability

G. Schedule 80 Heavy-Duty Nipples

• Thick-wall design extends service life under abrasive conditions

H. JIC-Fitted Pusher Line

• Eliminates gasket issues and simplifies field maintenance

I. MPV Metering Valve / #400 Pinch Valve

• MPV Valve: Manual plunger design for precise, adjustable abrasive flow

• #400 Pinch Valve: Controls air and media flow for smoother blast operation

J. Bag-Breaker & Screen

• Prevents foreign material from entering during abrasive refilling

K. Blow-Down Muffler

• Reduces noise during depressurization for operator comfort

L. 6″ FAST-FILL™ Pop-Up

• Speeds up abrasive filling and reduces downtime

Specifications

Applications

• General industrial blasting and surface preparation

• Tank and pipe maintenance projects

• Heavy-equipment restoration and coating removal

• Shipyard and marine applications

Compatibility

• OEM Replacement For: KEY HOUSTON #40300

• Fully compatible with K-Series Pressure Hold systems and legacy MPV /#400 valve configurations