PS6020 Pressure Switch 1/4 Inch | 4.5 GPM 4060 PSI

PS6020 Pressure Switch 1/4 Inch | 4.5 GPM 4060 PSI

The PS6020 is a heavy-duty brass pressure switch from Annovi Reverberi
designed specifically for balancing and controlling hot-water pressure washer
systems. Rated for a maximum system pressure of 4,060 PSI and
equipped with a 1/4″ male connection, this switch senses discharge
pressure and changes the state of an internal micro-switch at a high activation
point of approximately 652 PSI. In practical terms, that makes the
PS6020 an excellent choice for higher-output, 4.5 GPM-class hot-water washers
and industrial rigs where the burner or heating circuit must only fire when
full operating pressure and flow are present.

• High-pressure brass pressure switch for professional hot-water systems.
• Max system rating: 4,060 PSI for compatibility with most commercial washers.
• Activation threshold: ~652 PSI for positive, “fully up to pressure” confirmation.
• Connection: 1/4″ M process port for compact installation in discharge plumbing.
• Ideal for 4.5 GPM-class hot-water and high-demand cleaning equipment.

How the PS6020 Works

The PS6020 is installed in the high-pressure discharge line of a pressure
washer, typically downstream of the pump and unloader. Inside the brass body,
a pressure-sensing diaphragm responds to line pressure. As the operator opens
the spray gun and demand increases, system pressure rises. When it reaches
approximately 652 PSI, the diaphragm moves enough to actuate the internal
micro-switch, changing the electrical state (open or closed depending on the
wiring configuration). That change is used as a demand signal for the burner,
coil valve, or other control device. When the trigger is released and pressure
drops below the threshold, the switch resets to its rest position, signaling
the control system to shut down the burner and route water back through bypass.

Typical operating sequence

• Gun open, demand ON: pressure rises above 652 PSI, the switch trips, and the burner or heating circuit is enabled.
• Gun closed, demand OFF: pressure falls below the setpoint, the switch releases, and the burner is de-energized while flow returns to bypass.
• Automatic reset: each time the trigger cycles, the PS6020 follows line pressure without any manual resetting.

Construction and Ratings

The PS6020 is built for the demanding environment of professional cleaning
equipment. A robust brass hydraulic body houses a pressure diaphragm and
micro-switch assembly designed for repeated cycling under high pressure and
elevated temperatures. The electrical contacts are sized for direct connection
to many burner controls, fuel solenoids, or relay coils, while the integrated
cord makes routing into cabinets and frames straightforward.

• Hydraulic body: corrosion-resistant brass for strength and long service life.
• Max pressure rating: 4,060 PSI (280 bar) system pressure.
• Activation pressure: approx. 652 PSI for high-confidence demand detection.
• Max fluid temperature: about 167 °F (75 °C), compatible with typical hot-water coil outlets.
• Electrical rating: up to 250 V AC, 16 A (typical burner/control load range).
• Cord length: approximately 45″ molded cable for flexible mounting.

Design advantages

• High activation point helps ensure adequate flow and pressure through the coil before heat is applied.
• Simple, mechanical diaphragm design—no electronics or software to fail.
• Compact 1/4″ M connection allows mounting close to the pump or coil outlet.
• Standard two- or three-conductor wiring for easy integration into OEM harnesses.

Role in Hot-Water System Control

AR describes its brass pressure switches as devices for balancing hot-water
systems: as the user demands hot water, the pressure switch activates
to allow water through the heating coil; when demand ceases, it changes state
and sends water through the bypass circuit instead. The PS6020, with its higher
652 PSI activation point and 4.5 GPM-class configuration, is particularly well
suited to larger or higher-pressure hot-water rigs where you want the burner
to stay off until the system is truly “up to speed.”

• Coordinates burner firing with actual line pressure, not just pump running status.
• Protects coils from overheating when there is insufficient water flow.
• Reduces fuel waste by preventing the burner from firing during low- or no-demand conditions.
• Works hand-in-hand with flow switches, thermostats, and high-limit controls for layered safety.

PS6020 Pressure Switch Integration examples

• Wired in series with a flow switch and thermostat to create a complete burner interlock chain.
• Used as the primary “demand” signal for an electronic burner controller or relay logic.
• Mounted near the coil outlet to track true coil pressure in hot-water trailer or skid builds.

Typical Applications

Thanks to its high activation pressure, 4,060 PSI rating, and compact 1/4″ M
connection, the PS6020 is a strong fit for a wide range of commercial and
industrial cleaning systems. It is particularly attractive for OEMs and service
centers working with higher-output hot-water machines and burner-equipped rigs.

• Hot-water pressure washers – trailer rigs, skids, and cabinet units running at higher pressures.
• Fleet and truck wash systems – box trucks, over-the-road tractors, refuse vehicles, and equipment wash bays.
• Industrial maintenance washers – degreasing lines, plant maintenance stations, and heavy equipment cleaning.
• Sanitation and facility cleaning – food, beverage, and industrial facilities requiring consistent, safe hot water.
• OEM pressure washer builds – custom hot-water packages where reliable burner control and coil protection are priorities.

Key Specifications – PS6020 Pressure Switch

• Model: PS6020
• Type: brass pressure switch for hot-water pressure washer systems.
• Max pressure rating: 4,060 PSI (280 bar).
• Activation pressure: approx. 652 PSI.
• Connection: 1/4″ M pressure port.
• Flow class: 4.5 GPM-type systems (hot-water / higher-output rigs).
• Electrical rating: up to 250 V AC, 16 A.
• Max fluid temperature: about 167 °F (75 °C).
• Cord length: ~45″ molded cable.
• Typical use: burner / coil control and bypass management in hot-water pressure washer systems.