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

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

• The VB80-170-SS-NPT Unloader Valve from Annovi Reverberi is a
  professional-grade stainless steel pressure control device designed for safe, consistent
  performance in medium- to heavy-duty cleaning systems.
• Rated for 2,450 PSI with a maximum flow capacity of
  21 GPM, it protects pumps, hoses, and accessories from damaging
  pressure spikes while maintaining stable cleaning power.
• Premium 316 stainless steel construction paired with
  NPT-threaded connections delivers outstanding corrosion resistance
  and easy integration with North American high-pressure systems.
• Ideal for contractors, marine operators, and industrial facilities where safety,
  reliability, and compatibility are top priorities.

Built for Corrosive & Demanding Environments

• Fabricated from 316 stainless steel, providing superior resistance
  to chloride corrosion, chemical attack, and pitting compared to brass unloaders.
• Engineered for marine cleaning rigs exposed to salt spray and
  harsh weather.
• Suitable for chemical processing plants using aggressive
  detergents, solvents, and caustic solutions.
• Meets sanitary expectations in food and beverage facilities where
  stainless components are preferred.
• Heavy-duty stainless housing and reinforced internals deliver long service life
  under frequent start–stop cycles in demanding contractor and commercial use.

Automatic Bypass for Pump Protection

• Utilizes Annovi Reverberi’s proven VB80-170-SS-NPT unloader design to automatically divert
  water into bypass mode the instant spray flow is interrupted.
• Prevents overpressure conditions that can crack pumps, rupture hoses, or damage
  guns and accessories.
• Reduces system strain during idle time, lowering wear on seals, pistons, and
  bearings.
• Extends pump service life, reduces maintenance costs, and enhances operator safety
  by keeping system pressure under control.
• Smooth bypass transitions support high-duty cleaning crews that depend on
  repeatable performance shift after shift.

NPT Connections for North American Systems

• VB80-170-SS-NPT Equipped with NPT (National Pipe Thread) fittings instead of BSP,
  eliminating the need for thread adapters in U.S. and Canadian installations.
• 1″ inlet and outlet ports support flows up to 21 GPM,
  making the valve suitable for larger pumps and multi-gun setups.
• Integrates seamlessly into fixed wash bays, mobile contractor
  trailers, and industrial CIP (Clean-In-Place) loops.
• Simplified plumbing and direct-thread compatibility make replacements faster and
  easier for service centers and repair shops.

Precision Engineering & Serviceability

• Each VB80-170-SS-NPT is precision-machined and factory-tested for
  pressure accuracy, flow performance, and durability.
• Integrated pressure adjustment mechanism allows technicians to
  fine-tune system pressure to match job requirements and protect pump life.
• Serviceable design enables easy replacement of seals, springs, and seats
  without discarding the entire valve.
• Lower lifetime operating costs make it a practical, long-term investment for
  professional cleaning and process systems.

Shipping & Availability

• Part of AR’s professional product catalog and widely stocked by
  distributors across North America.
• Typical orders ship via UPS Ground within 24 hours, with delivery
  in approximately 2–3 business days during peak season.
• Compact packaging and clear labeling make it both
  service-center friendly and suitable for retail distribution.

Key Advantages of the VB80-170-SS-NPT

• Corrosion Resistance: 316 stainless steel body and internals for
  harsh or sanitary environments.
• Medium–High Pressure Capability: Rated to 2,450 PSI with flow
  capacity up to 21 GPM.
• NPT Connections: Designed for North American systems, simplifying
  installation and replacement.
• Pump Protection: Automatic bypass prevents overpressure and helps
  avoid overheating during idle cycles.
• Precision Adjustment: Easily dial in the exact working pressure
  needed for each application.
• Serviceable Design: Long-life components with readily available
  spare parts reduce total cost of ownership.

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

Key Features & Applications

• Pressure Rating: 2,450 PSI.
• Flow Capacity: Up to 21 GPM.
• Construction: 316 stainless steel body with reinforced internals.
• Connections: NPT-threaded ports for U.S. and Canadian systems.
• Function: Automatic bypass with adjustable pressure regulation for
  pump and system protection.
• Applications: Marine cleaning and shipyard wash systems; food and
  beverage processing with sanitary CIP loops; contractor and fleet washing rigs;
  chemical plant washdown stations; facility maintenance requiring corrosion-resistant
  safety components.