VB80-170-SS | 2450 PSI 316SS Stainless Unloader Valve Body

VB80-170-SS – Unloader Valve – 2500 PSI – 316 Stainless Steel

The Annovi Reverberi VB80-170-SS Unloader Valve is a professional-grade,
corrosion-resistant pressure control component engineered for medium-to-heavy duty
pressure washer systems operating in harsh or regulated environments. Rated for
2,500 PSI (170 bar), this model is constructed entirely from
316 stainless steel, making it an ideal solution where traditional
brass unloaders suffer from corrosion, chemical attack, or premature wear.

Designed for reliability, safety, and long service life, the VB80-170-SS delivers
stable pressure regulation and dependable automatic bypass protection. It is widely
used in marine systems, food and beverage processing facilities, chemical plants,
and industrial wash operations where material compatibility and hygiene standards
are just as important as performance.

Heavy-Duty Stainless Steel Construction

Superior Corrosion Resistance

• Manufactured entirely from premium 316 stainless steel.
• Withstands constant exposure to saltwater, harsh detergents, and aggressive chemicals.
• Resists pitting, scaling, and chloride attack better than 303 stainless alternatives.
• Non-reactive, hygienic construction suitable for regulated and sanitary environments.

316 stainless steel is widely recognized for its superior corrosion resistance,
particularly in chloride-rich and chemically aggressive environments. This makes
the VB80-170-SS an excellent choice for installations where equipment is exposed to
salt spray, cleaning agents, caustics, or frequent washdown cycles. In applications
where brass components can dezincify or degrade over time, this stainless-steel
unloader maintains structural integrity and sealing reliability.

Engineered for Demanding Environments

• Marine cleaning systems with continuous saltwater exposure.
• Food and beverage facilities requiring sanitary, non-contaminating components.
• Chemical processing plants using aggressive cleaning solutions.
• Contractor and industrial wash operations demanding long-term durability.

These environments place unique stresses on pressure washer components. The
VB80-170-SS is engineered to thrive under these conditions, providing dependable
performance without the corrosion-related failures commonly seen in standard
brass unloaders.

Automatic Bypass Function for Pump Protection

Protects System Components

• Automatically diverts flow into bypass when the spray trigger is released.
• Prevents destructive overpressure spikes within the hydraulic system.
• Reduces system strain and heat buildup during idle cycles.
• Protects seals, pistons, hoses, and accessories from thermal and mechanical damage.
• Improves operator safety through stable, predictable pressure control.

In pressure washer systems, uncontrolled pressure during trigger release can
quickly lead to pump overheating, seal failure, or hose rupture. The VB80-170-SS
acts as a critical safety component by immediately redirecting flow into bypass,
relieving pressure before damage occurs. This function is especially important
in systems with frequent start-stop cycles or multiple operators.

Precision Engineering for Consistent Operation

Reliable Performance Under Load

• Precision-machined internal components ensure smooth, stable pressure regulation.
• Adjustable mechanism allows fine-tuning of system PSI for specific applications.
• Replaceable seals and springs support long-term serviceability.
• Factory-tested by Annovi Reverberi for accuracy and safe bypass performance.

Consistent pressure is essential for predictable cleaning results and system
protection. The VB80-170-SS is engineered to maintain steady output even during
extended run times and variable flow conditions. Once adjusted, it holds its
setting reliably, reducing the need for frequent readjustment or service.

Installation & Service

Professional-Grade Integration

• BSP-threaded stainless-steel connections for secure, leak-free installation.
• Compact footprint suitable for portable rigs and fixed wash systems.
• Easy access for technicians performing adjustments or routine maintenance.
• Replacement parts available quickly, typically shipping within 24 hours
  (2–3 days during peak season).

The VB80-170-SS integrates easily into professional pressure washer systems that
utilize BSP-threaded plumbing. Its compact design allows installation in tight
equipment bays while still providing access for adjustment and servicing. This
makes it a practical choice for both OEM equipment builds and retrofit applications.

Unique Advantages of the VB80-170-SS

What Makes This Model Stand Out

• Premium 316 stainless steel construction for maximum corrosion resistance.
• Rated to 2,500 PSI for medium-to-high pressure professional systems.
• Automatic bypass function extends pump and system lifespan.
• Operator-friendly adjustment for precise cleaning performance.
• Trusted in marine, chemical, food-processing, and industrial environments.

Key Features & Specifications

Performance & Build Details

• Pressure Rating: 2,500 PSI (170 bar)
• Construction: 316 stainless steel body and internals
• Function: Automatic bypass for pump protection
• Build: Precision-machined with heavy-duty seals
• Connections: BSP-threaded fittings

Applications

Ideal Use Cases

• Marine and offshore pressure washing systems
• Food and beverage processing facilities
• Contractor-grade daily cleaning rigs
• Chemical plants requiring corrosion-resistant components
• Industrial maintenance environments using harsh detergents or chemicals

For operators who require dependable pressure control in corrosive or regulated
settings, the VB80-170-SS Unloader Valve delivers a proven combination
of durability, safety, and precision. It is a reliable upgrade from brass unloaders
and a long-term investment in system protection, reduced downtime, and consistent
cleaning performance.