VRS3-250A | Unloader Valve, 3700 PSI, 3/8 NPT Without Knob

VRS3-250A | Unloader Valve, 3700 PSI, 3/8 NPT Without Knob

• The Annovi Reverberi VRS3-250A is a compact, preset
  unloader valve rated for
  250 BAR (≈3,700 PSI), designed for systems that require
  fixed, reliable pressure control without frequent operator adjustment.
• Features a no-knob design, making it ideal for OEM builds,
  rental fleets, and contractor rigs where tamper resistance and simplicity
  are critical.
• Automatically diverts flow into bypass mode when the spray
  trigger is released, protecting pumps, hoses, and seals from harmful
  overpressure conditions.
• Compact footprint with 3/8″ NPT ports integrates easily
  into North American plumbing standards and space-constrained systems.
• Balances rugged performance, preset safety, and space-saving
  installation for professional cleaning environments.

Simplified, Preset Regulation

• No-knob configuration provides factory-preset regulation,
  eliminating the need for on-site pressure adjustment.
• Reduces operator error by preventing accidental
  mis-adjustments that could overstress pumps or create unsafe working
  pressures.
• Enables standardized pressure control across multiple units,
  ideal for fleets, OEM systems, and rental equipment.
• Tamper-resistant design helps maintain compliance in systems
  where pressure settings must remain fixed and predictable.
• Simplifies daily operation by keeping the system within safe limits
  without requiring user intervention.

3/8″ NPT Compact Footprint

• Equipped with dual 3/8″ NPT ports for straightforward
  integration into North American pressure washer plumbing.
• Compact housing fits easily into cart-mounted units,
  trailer rigs, and tight mechanical rooms.
• Space-saving design is ideal for OEM layouts where every
  inch of frame or enclosure space matters.
• Supports flexible equipment configurations without sacrificing
  pressure control or safety.

Rugged Construction & Pump Protection

• Built with a reinforced housing and
  precision-machined internals to withstand continuous duty
  and frequent cycling.
• Automatic bypass function redirects water when the trigger
  is released, preventing damaging overpressure and heat buildup.
• Helps extend pump life by reducing stress on seals, pistons, and
  bearings during idle and stop/start operation.
• Contributes to overall system reliability, reducing
  unplanned downtime and repair frequency in demanding environments.

Key Specifications

• Model: VRS3-250A
• Type: Unloader valve (no-knob, preset regulation)
• Maximum Pressure: 250 BAR (≈3,700 PSI)
• Connections: 3/8″ NPT ports
• Function: Automatic bypass to protect pumps and components
• Design: Compact, tamper-resistant body with precision internal components

Typical Applications

• OEM Systems – standardized builds where preset regulation
  removes the need for field calibration.
• Mobile Wash Rigs – trailer and vehicle-mounted systems that
  benefit from compact, reliable unloader protection.
• Rental Fleets – tamper-resistant design keeps machines
  operating safely across multiple users.
• Facility Cleaning Systems – mechanical rooms and wash bays
  with limited space and fixed operating pressures.
• Contractor Equipment – high-cycle rigs requiring consistent,
  maintenance-light pump protection.

Operator & System Benefits

• Consistent preset pressure keeps systems operating within
  safe limits at all times.
• Error-proof operation – no external knob to misadjust,
  ideal for shared or rental equipment.
• Compact & lightweight design reduces installation
  footprint without compromising performance.
• Extended pump life through automatic bypass and reduced
  mechanical stress.
• Low maintenance – fewer external parts and rugged build
  translate into less upkeep and downtime.

SVRS3-250A

• The Annovi Reverberi VRS3-250A – Unloader Valve – 3700 PSI – 3/8″ NPT Without Knob
  is a compact, tamper-resistant unloader ideal for professional systems that
  demand simplicity, safety, and durability.
• With its preset regulation, 3/8″ NPT compatibility, automatic bypass
  protection, and rugged construction, it safeguards pumps, reduces downtime,
  and simplifies operation in OEM, rental, contractor, and facility
  cleaning applications.