VB80-310-SS | 4500 PSI 316SS Stainless Unloader Valve Body

VB80-310-SS – Unloader Valve – 4500 PSI – 316 Stainless Steel, BSP Connections

The Annovi Reverberi VB80-310-SS is a high-performance stainless steel unloader valve
built for heavy-duty contractor, industrial, and marine cleaning systems that demand
maximum reliability under continuous use. With a pressure rating of 4,500 PSI and a
flow capacity of 21 GPM, this top-of-the-line VB80 Series model is one of the most
durable and versatile unloader solutions in its class.

Constructed from premium 316 stainless steel, the VB80-310-SS provides excellent
resistance to chemical attack, saltwater exposure, and high-temperature detergents.
It is the preferred choice for facilities where corrosion resistance is non-negotiable,
including shipyards, food and beverage processing plants, petrochemical facilities,
and industrial wash bays. Precise internal machining delivers smooth, repeatable
pressure regulation even in harsh environments.

Built to Withstand Harsh Environments

• 316 stainless steel body and internals outperform brass or plated unloaders in corrosive conditions.
• Superior chloride resistance for marine and offshore applications.
• Compatible with caustic cleaning agents, solvents, and acidic wash solutions.
• Supports sanitary and hygienic requirements in food and beverage processing.
• Extended service life reduces replacement frequency and total cost of ownership.

The VB80-310-SS is frequently specified for coastal contractor rigs, chemical
processing plants, and industrial wash systems where fail-safe durability under
heavy workloads is essential.

Automatic Bypass Protection

• Automatic bypass diverts water when the trigger gun is released.
• Prevents dangerous overpressure spikes that can rupture hoses or damage pumps.
• Reduces pump strain and heat buildup during idle operation.
• Improves operator safety by eliminating sudden pressure surges.
• Extends the service life of pumps, seals, hoses, and accessories.

This smooth transition to bypass is critical for high-flow contractor systems and
continuous industrial setups where pressure stability and pump protection matter.

BSP Connections for International Compatibility

• BSP-threaded ports integrate easily with European and international systems.
• 1″ inlet and outlet connections support high-flow circuits up to 21 GPM.
• Ideal for OEMs and service centers needing drop-in compatibility without adapters.

Precision Machining & Serviceability

• Each valve is factory-tested to verify consistent pressure regulation.
• Adjustable mechanism allows quick fine-tuning of working pressure.
• Fully rebuildable design; seal kits and internal parts are readily available.
• Serviceable construction lowers lifetime cost and extends component value.

Shipping & Availability

• Stocked throughout the AR North America distribution network.
• Typical orders ship via UPS Ground within 24 hours.
• Allow 2–3 business days for delivery during peak seasons.

Key Advantages of the VB80-310-SS

• Extreme durability: Full 316 stainless steel construction for maximum corrosion resistance.
• High pressure rating: Up to 4,500 PSI for heavy-duty contractor and industrial systems.
• High flow capacity: Handles 21 GPM for large-volume rigs and multi-gun stations.
• Automatic bypass: Protects pumps and components from overpressure and heat-soak.
• BSP connections: International compatibility for OEMs and global installations.
• Serviceable design: Easy maintenance with available rebuild kits.

Key Features & Applications

• Pressure rating: 4,500 PSI
• Flow capacity: 21 GPM
• Construction: 316 stainless steel body with reinforced internals
• Connections: BSP-threaded 1″ ports for professional integration
• Function: Automatic bypass with adjustable pressure regulation

Typical Applications

• Marine cleaning systems and shipyard facilities
• Industrial chemical wash stations
• Contractor high-flow rigs and multi-gun setups
• Food and beverage processing CIP (Clean-In-Place) systems
• Heavy industrial maintenance and facility cleaning