AR21394 | Mini-Matic Unloader Valve TSS 2600 PSI Shutdown Ready

AR21394 | Mini-Matic Unloader Valve TSS 2600 PSI Shutdown Ready

The Annovi Reverberi AR21394 Mini-Matic 4/B TSS Unloader Valve combines two
critical functions—precise pressure regulation and automatic shutoff—into one compact, reliable
unit. Rated for up to 2,600 PSI, this valve protects the pump, improves operator
safety, and increases overall system efficiency. Its TSS (Total Stop System) design not only
diverts water to bypass when the trigger is released, but also shuts the pump off completely,
eliminating idle run time, noise, and unnecessary wear.

Key Features

• Pressure rating: Adjustable up to 2,600 PSI for light- to medium-duty commercial use.
• Valve type: Mini-Matic 4/B unloader with integrated Total Stop System (TSS).
• Bypass function: Automatically diverts flow when the spray gun trigger is released.
• TSS shutoff: Sends a stop signal to the pump so the motor stops instead of idling in bypass.
• Durable build: Heavy-duty body, quality seals, and precision internals for frequent cycling.
• Applications: Commercial cleaning, contractor rigs, energy-conscious and rental fleets.

Total Stop System (TSS) Advantage

The integrated TSS function takes pump protection a step beyond standard unloaders that only
recirculate water in bypass:

• Energy savings: Prevents the motor from running while the gun is closed, reducing power consumption and operating costs.
• Extended equipment life: Less idle run time means reduced wear on pumps, seals, and valves.
• Improved safety: With the pump off, stored system pressure is reduced, lowering the risk of accidental discharge.
• Noise reduction: Eliminates idle pump noise for a quieter work environment.
• Automatic restart: System restarts when the trigger is pulled, keeping operation smooth and intuitive.

Construction & Durability

• Materials: Heavy-duty metal housing engineered for frequent start/stop cycles.
• Seals: High-quality O-rings and gaskets to resist leaks and maintain stable pressure.
• Precision internals: Machined components provide smooth transitions between spray, bypass, and TSS shutoff modes.
• Designed for: Compact commercial and contractor-grade pressure washer systems.

Installation & Adjustment

• Connections: Standard Mini-Matic 4/B AR21394 porting for easy integration with compatible AR pumps and frames.
• Pressure setting: Simple adjustment screw lets you dial in working pressure within the rated range (do not exceed 2,600 PSI or pump limits).
• TSS wiring: Requires proper electrical hookup to the pump motor or control box for automatic stop/start operation.
• Bypass routing: Route bypass line back to pump inlet or a supply tank—never restrict or cap the bypass line.
• Maintenance: Periodic checks of seals, fittings, and electrical connections keep the system operating reliably.

Applications

• Commercial cleaning contractors: High-frequency start/stop work where pump life and energy savings matter.
• Facility maintenance teams: Schools, hospitals, warehouses, and plants needing quieter, safer operation.
• Energy-conscious systems: Operators looking to lower utility costs and reduce carbon footprint.
• Rental fleets: Built-in protection that reduces misuse-related damage and maintenance costs.

AR21394 | Mini-Matic Unloader Valve TSS 2600 PSI Shutdown Ready

Specifications

• Model: AR21394 Mini-Matic 4/B TSS Unloader Valve
• Maximum pressure: 2,600 PSI
• Typical flow range: Matches Mini-Matic 4/B systems (up to approx. 4.0 GPM; verify with pump datasheet).
• Valve type: Mini-Matic unloader with integrated Total Stop System.
• Bypass function: Automatic diversion of flow with complete pump shutoff via TSS.
• Construction: Heavy-duty body with reinforced internal components.
• Primary applications: Commercial cleaning, light industrial systems, rental equipment, and energy-efficient wash setups.

Bottom line: The AR21394 Mini-Matic 4/B TSS Unloader Valve is both
a safety device and an efficiency upgrade—combining proven Mini-Matic pressure regulation with
energy-saving Total Stop technology to extend pump life, reduce operating costs, and improve
operator safety in modern commercial and contractor-grade cleaning systems.