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

Part Number: 41-300-MPV-C
Compatible With: KEY HOUSTON #40300
Weight: 525.04 lbs
Warranty: 5-Year Limited / 10-Year Vessel Warranty

Overview

The 3.5 cu ft K-Series Portable Sandblast Pot (Silver Package) is a high-efficiency pneumatic blasting system engineered for performance, safety, and durability.
Featuring an MPV Metering Valve for precise abrasive control and a #400 Pinch Valve for reliable on/off operation, this unit delivers consistent media flow and smooth cycling under demanding field conditions.
Its Pneumatic Pressure Hold System keeps the vessel pressurized during pauses, minimizing air and abrasive loss while ensuring fast restarts and superior operational control.

Designed for contractors, fabrication shops, and industrial service crews, the Silver Package adds premium protective gear and accessories for professional blasting environments.

Silver Blasting Package Includes

• (1) 10-100BLK-050-3AL – 1″ Blast Hose Assembly Kit with Couplings (50′)

• (1) 1201-1173 – #4 Tungsten Carbide, All-Poly Nozzle

• (1) 122-9150 – Blast Suit, Lightweight, Large

• (1) 407701 – Luxury Double-Palmed Gloves (Pair)

• (1) 407000-PFC – RPB® NOVA 2000™ Respirator Package

Key Features & Benefits

A. Pressure Vessel

• 3.5 cu ft (100 L) capacity, 150 PSI (10.3 BAR) working pressure

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

• C.R.N. Certified for all provinces in Canada

B. Pressure Hold System

• Keeps vessel pressurized when control handle is released

• Smoother starts and stops than pressure-release systems

• Reduces abrasive use and minimizes downtime

C. Emergency Air Tank

• Backup air supply maintains pinch valve closure during compressor failure

• Ensures safe and reliable shutdown under emergency conditions

D. Heavy-Duty Moisture Separator

• Removes condensation and moisture to maintain clean, dry air flow

E. 1″ Galvanized Piping

• Corrosion-resistant construction ensures longer life and steady airflow

F. Heavy-Duty Full-Port Ball Valves

• Unrestricted airflow for maximum blasting efficiency

G. Schedule 80 Heavy-Duty Nipples

• Thick-wall construction resists abrasive wear, extending system lifespan

H. JIC-Fitted Pusher Line

• Eliminates gasket leaks and simplifies maintenance in field environments

I. MPV Metering Valve / #400 Pinch Valve

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

• #400 Pinch Valve: Smooth start/stop control of air and media for steady operation

J. Bag-Breaker & Screen

• Integrated design prevents debris entry during abrasive refilling

K. Blow-Down Muffler

• Reduces noise output during depressurization for a safer workspace

L. 6″ FAST-FILL™ Pop-Up

• Enables quick abrasive refills for continuous operation

Specifications

Applications

• Industrial and field sandblasting operations

• Equipment and tank restoration

• Bridge, shipyard, and structural steel maintenance

• Surface prep for painting, coating, and corrosion control

Compatibility

• OEM Replacement For: KEY HOUSTON #40300

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