AR20400G | Gymatic 3/B Unloader Valve 3650 PSI GHT Inlet Body

AR20400G | Gymatic 3/B Unloader Valve 3650 PSI GHT Inlet Body

The Annovi Reverberi AR20400G Gymatic 3/B Unloader Valve is a
professional-grade safety and regulation component designed to provide
reliable pump protection and consistent system pressure in heavy-duty cleaning
environments. Built for contractors, industrial maintenance teams, and
commercial users, this valve diverts water flow into bypass mode when the
spray trigger is released, preventing dangerous pressure spikes, reducing
wear, and extending the life of your pump and connected components.

Operating within a range of 3,650–3,800 PSI, the AR20400G
delivers professional-level performance for systems that demand stable,
repeatable cleaning cycles under tough conditions.

Pressure Control & Safety

The AR20400G’s primary function is automatic system pressure regulation. When
the operator releases the spray trigger, the valve shifts to bypass mode and
allows water to recirculate instead of dead-heading against the pump. This:

• Prevents sudden overpressure that can damage seals, hoses, and pistons.
• Reduces mechanical stress and premature pump wear.
• Maintains steady output pressure for consistent cleaning performance.

Adjustable controls allow technicians to fine-tune working pressure within the
rated PSI range, providing flexibility for different tools, nozzles, and job
requirements.

Rugged Construction

Built with precision-machined brass internals, stainless-steel springs, and a
reinforced housing, the AR20400G is designed for durability and consistent
operation in continuous-use environments. Its rugged build delivers stable
performance over long duty cycles, making it ideal for:

• Contractor wash rigs and mobile cleaning trailers.
• Industrial facilities and plant washdown systems.
• Commercial pressure washer fleets.

Every unit is factory-tested for functionality, stability, and safety prior to
shipment, so the unloader performs reliably right out of the box.

Installation & Adjustment

The AR20400G is designed for straightforward installation on compatible AR
pumps and systems. It can be mounted and serviced with common shop tools.
Pressure adjustment is handled via the top screw and locknut assembly, making
it simple to set working pressure for specific jobs.

Clear adjustment points and intuitive layout make this valve user-friendly for
repair shops, field technicians, and experienced DIY users. Replacement parts
and service kits are available to extend working life.

Chemical Injector Notes

The AR20400G is a standalone unloader valve and does not
include an integrated chemical injector. For systems requiring detergent draw,
a separate downstream injector can be added. This modular approach lets
operators pair the AR20400G with AR North America injector kits or other
accessories to match their cleaning setup.

Shipping & Availability

Like most AR North America components, the AR20400G is typically in stock for
fast fulfillment. Orders usually ship via UPS Ground within 24 hours, with
lead times extending to 2–3 business days during peak cleaning season. Units
are securely packaged and clearly labeled for retail counters, distributors,
and online resellers.

Product Family & Compatibility

The AR20400G belongs to the C2 Gymatic family of unloaders,
designed for high-pressure operation at 3,650–3,800 PSI. In
the AR unloader lineup:

• M2 Minimatic unloaders: Adjustable to approximately
  2,600–2,900 PSI for lighter-duty systems.
• C2 Gymatic unloaders: Higher-pressure range suited to
  professional-grade equipment (including AR20400G).
• VR unloaders (VR35 family): Configured for AR RR, XM, and
  RK pump series.

This family structure makes it easier to choose the correct unloader based on
pump series, pressure requirement, and application.

Key Benefits

• Automatic bypass protects pumps and components when the trigger is released.
• Adjustable 3,650–3,800 PSI pressure range for versatile use.
• Heavy-duty construction with precision machining for long service life.
• Easy installation and service with standard shop tools.
• Compatible with AR professional pump series and commercial cleaning rigs.
• Fast UPS Ground shipping, typically within 24 hours (2–3 days in peak season).

Applications

• Commercial contractors: Mobile wash systems, fleet washing,
  construction-site cleanup.
• Industrial operators: Plant washdowns, equipment cleaning,
  chemical facility maintenance.
• Facility maintenance teams: Warehouses, municipalities, and
  sanitation services.
• Repair shops & DIY users: Accessible, easy-to-install
  safety solution for pump protection.

Summary

The Annovi Reverberi AR20400G Gymatic 3/B Unloader Valve
delivers professional-grade pressure regulation and automatic pump protection
for commercial and industrial cleaning systems. Rated for 3,650–3,800 PSI, it
combines rugged construction, factory-tested reliability, and user-friendly
adjustment in a compact package. Whether installed on a mobile contractor rig
or a fixed industrial wash system, the AR20400G helps ensure safety,
efficiency, and long equipment life—making it a dependable choice for cleaning
professionals worldwide.