VR56-250 | Unloader Valve, 3626 PSI, 3/8 NPT M-F

Overview

• The Annovi Reverberi VR56-250 is a professional
  unloader valve engineered for systems rated up to
  250 BAR (≈ 3,625 PSI).
• Designed for contractor fleets, facility managers, and heavy-duty
  commercial operators who need reliable pressure control and pump
  protection.
• Features a 3/8″ NPT male/female configuration that reduces
  the need for adapters and minimizes potential leak points.
• Compact, service-friendly layout delivers consistent pressure regulation,
  extends pump life, and supports safe operation in demanding environments.

Reliable Pressure Regulation

• Unloader valves are the safety backbone of high-pressure
  cleaning systems, preventing dangerous overpressure conditions.
• The VR56-250 automatically diverts water into bypass whenever
  the spray trigger is released.
• Pressure Relief: Eliminates harmful spikes that can damage
  seals, check valves, and hoses.
• Thermal Control: Reduces heat buildup during idle/bypass
  cycles, protecting pumps from overheating.
• Shock Absorption: Minimizes mechanical stress on internal
  pump components, extending overall service life.
• By stabilizing pressure and relieving stress, the VR56-250 helps operators
  maintain control while protecting critical equipment from costly downtime.

Construction & Design Advantages

• 3/8″ NPT Male-Female Configuration – Provides fast, secure
  installation, reduces adapter usage, and simplifies system plumbing.
• Durable Housing – Built to withstand repeated shocks,
  vibration, and heavy contractor handling.
• Precision-Machined Internals – Deliver smooth bypass
  operation and consistent pressure regulation during high-demand cycles.
• Compact Form Factor – Fits easily into tight equipment
  layouts, including portable and truck-mounted rigs.
• Service-Friendly Design – Straightforward access to
  internal components helps minimize downtime during maintenance.
• Balances rugged durability with ease of
  integration, making it a contractor-grade solution for field use.

Applications

• Contractor Fleets – Standardize across multiple rigs for
  consistent performance, safety, and simplified service.
• Heavy-Duty Commercial Washers – Stable operation in
  car washes, rental fleets, and industrial cleaning stations.
• Facility Maintenance – Supports large buildings,
  factories, and municipal systems where reliable equipment is critical.
• Agriculture & Equipment Cleaning – Protects pumps
  during extended cleaning of tractors, implements, and heavy machinery.
• Portable & Mobile Rigs – Compact size and NPT layout
  make it ideal for trailer- and truck-mounted wash systems.

Key Features & Specifications

• Model: VR56-250
• Type: Professional unloader valve
• Pressure Rating: 250 BAR (≈ 3,625 PSI)
• Connections: 3/8″ NPT
  male-female design (saves adapters and reduces leak points)
• Function: Automatic bypass for overpressure, heat, and pump
  protection
• Design: Compact, durable, service-friendly layout for field
  reliability
• Primary Applications: Contractor fleets, heavy-duty
  commercial washers, facility maintenance, agricultural and mobile wash systems

Benefits for Operators

• Extended Pump Life: Reduces mechanical stress, seal wear,
  and overheating by managing pressure and bypass cycles.
• Operator Safety: Prevents dangerous pressure spikes that
  can lead to hose failure or pump damage.
• Installation Efficiency: NPT male-female layout reduces
  plumbing transitions, fitting counts, and potential leak paths.
• Compact Size: Easy to integrate into tight system footprints
  without redesigning the rig.
• Durability: Built to withstand rough contractor use and
  daily industrial operation.
• Consistency Across Fleets: Standardizing on the VR56-250
  simplifies training, maintenance, and parts inventory.

Summary

• The Annovi Reverberi VR56-250 Unloader Valve is a
  medium-to-heavy duty, compact solution that combines smooth pressure
  regulation, durable construction, and simplified installation.
• Rated for 250 BAR (≈ 3,625 PSI), it automatically redirects
  flow into bypass whenever spray stops, preventing overpressure damage and
  maintaining stable system performance.
• Its 3/8″ NPT male-female configuration saves time,
  reduces adapter requirements, and minimizes leak risks for contractors and
  industrial crews.
• With a compact, service-friendly design and rugged build, the VR56-250 is a
  go-to choice for standardized fleets and heavy-duty cleaning
  systems that demand long-term reliability and safety.