VX3-310 | 4500 PSI 303SS Unloader Valve Black Spring Head Valve

VX3-310 – Unloader Valve – 4,500 PSI – 303 Stainless Steel, Black Spring

• The Annovi Reverberi VX3-310 is a professional-grade unloader valve engineered for
  consistent pressure regulation and reliable pump protection in high-demand cleaning systems
  rated up to 4,500 PSI.
• Manufactured from AISI 303 stainless steel, it offers superior resistance to
  corrosion and mechanical wear, making it ideal for contractors, fleet operators, and
  industrial cleaning crews.
• A precision-calibrated black spring delivers stable control at the upper end of
  the pressure spectrum for single-gun setups or contractor-grade multi-station systems.

Engineered for High-Pressure Performance

• Designed for systems up to 4,500 PSI, the VX3-310 handles heavy-duty cycles where
  pressure and heat can escalate quickly.
• Stable regulation at maximum pressure helps prevent dangerous fluctuations that
  compromise cleaning consistency and safety.
• Smooth bypass activation instantly diverts flow when the spray trigger is released,
  avoiding damaging pressure spikes and water hammer.
• Long-term pump protection reduces strain on seals, pistons, bearings, and hoses
  across extended cleaning sessions.
• By controlling both active spray and idle bypass conditions, the VX3-310 helps extend the life
  of pumps and connected accessories.

Durable 303 Stainless Steel Construction

• Built from AISI 303 stainless steel to withstand professional environments with
  moisture, detergents, and chemical exposure.
• Corrosion resistance makes it suitable for humid job sites, marine washdowns,
  and chemically intensive cleaning applications.
• Mechanical durability ensures the rugged housing and internals tolerate vibration,
  frequent cycling, and physical stress.
• Reduced maintenance thanks to stainless steel’s resistance to pitting and surface wear,
  extending service intervals and lowering total cost of ownership.
• Compact stainless construction balances strength and resilience without adding unnecessary bulk to the rig.

Automatic Bypass Protection

• Functions as a critical safety and protection device for pumps, hoses, and fittings.
• Automatically shifts into bypass mode when the spray trigger is released, relieving
  system pressure immediately.
• Overpressure protection helps prevent premature pump failures and catastrophic
  component damage.
• Thermal management reduces heat buildup during idle recirculation cycles, helping
  systems run cooler and more efficiently.
• Enhances operator and system safety by lowering the risk of hose blowouts, seal failures,
  or other pressure-related hazards.

Key Specifications

• Maximum Pressure: 4,500 PSI (≈ 310 BAR)
• Construction: AISI 303 stainless steel body and internal components
• Spring Calibration: black spring, tuned for high-pressure regulation
• Bypass Function: automatic bypass for pump safety and system efficiency
• Design: compact, durable form factor for easy integration into contractor and industrial rigs

Applications

• Contractor-grade systems – portable and trailer-mounted rigs operating daily at
  high PSI.
• Industrial cleaning – factory floors, equipment maintenance, and high-output wash bays.
• Fleet & vehicle washes – heavy-use systems where pump protection is critical
  to uptime.
• Marine and moist environments – corrosion-resistant construction stands up to
  saltwater and high humidity.
• OEM and retrofit projects – compact size simplifies integration into new builds
  or replacement installations.

Operator & System Benefits

• Reliability: protects pumps, hoses, and accessories from catastrophic overpressure events.
• Durability: stainless steel body and internals resist corrosion and wear, even
  in harsh environments.
• Precision control: black spring calibration maintains stable pressure at the
  upper operating range.
• Cost savings: extended pump and component life reduce downtime and replacement costs.
• Ease of installation: compact, rugged design integrates quickly into a variety of
  professional cleaning systems.

Summary

• The Annovi Reverberi VX3-310 – Unloader Valve – 4,500 PSI – 303SS Black Spring is a
  high-pressure, stainless steel solution for professionals who require reliable regulation and
  pump protection in demanding environments.
• Built from AISI 303 stainless steel and equipped with a precision black
  spring, it delivers stable control, automatic bypass protection, and long service life
  under heavy daily use.
• From contractor-grade rigs to industrial wash systems, the VX3-310 provides the ruggedness,
  precision, and safety features needed to protect equipment investments and maintain
  continuous productivity.