AL693 Mini Pressure Switch | 3/8 in Male, Compact AL Series

AL693 Mini Pressure Switch | 3/8 in Male, Compact AL Series

The AR AL693 Mini Pressure Switch 3/8 in Male is a durable, precision-calibrated control
component engineered by Annovi Reverberi to provide dependable automatic pressure regulation in
high-pressure washer systems. Designed with a 3/8-inch male threaded connection, this compact
switch integrates smoothly into a wide range of cleaning equipment, monitoring system pressure and
automatically starting or stopping the pump as pressure levels change.

By matching pump operation to real-time demand, the AL693 maintains balanced water flow, reduces
over-pressurization and pump strain, and prevents unnecessary motor wear. It combines compact design,
mechanical strength, and responsive performance to suit professional, commercial, and serious residential
pressure-washer setups.

Construction & Design

Brass Housing with Reinforced Internals

The AL693 is built from premium materials to withstand harsh operating environments:

• Corrosion-resistant brass body provides structural strength and long-term resistance to water, detergents, and temperature swings.
• Reinforced polymer internal structure supports the diaphragm and contact assembly while keeping overall size compact.
• 3/8 in male threaded connection delivers a secure, leak-resistant fit that holds tight under vibration and extended runtime.

Internally, a precision-tuned diaphragm and electrical contact system respond quickly to pressure
variations, enabling smooth start/stop cycles and consistent water delivery. This mechanism helps eliminate
pressure surges and flow interruptions that can otherwise fatigue hoses, spray guns, and nozzles.

Automatic Pressure Regulation

How the AL693 Controls the Pump

• Cut-in: when system pressure drops below the lower setpoint, the switch closes the circuit to start the pump.
• Cut-out: when pressure reaches the upper setpoint, the switch opens the circuit to stop the pump.
• Balanced flow: automatic cycling maintains steady spray pressure and reduces stress on the drive end and seals.
• Energy efficiency: prevents the pump from running when there is no demand, cutting power consumption and heat buildup.

Each AL693 is manufactured under Annovi Reverberi’s strict engineering standards for uniform threading,
consistent pressure calibration, and durable contact components rated for thousands of cycles, ensuring
repeatable performance in demanding applications.

Hydraulic Performance & Port Sizing

3/8 in Male Connection for Higher Flow Systems

The 3/8-inch male port gives the AL693 extra flow capacity compared with smaller 1/4-inch
switches, making it well suited to medium- and large-frame washers.

• Smooth hydraulic transition: maintains full pressure integrity with minimal internal restriction.
• Stable spray pattern: supports steady, uniform output even during long duty cycles.
• Fixed, non-swivel body: enhances structural stability and prevents loosening from vibration or torque.

Installation & Integration

Compact Footprint for Tight Spaces

The AL693’s compact body fits easily into confined spaces on mobile cleaners, portable pressure washers, and
integrated pump systems.

• Thread the 3/8 in male connection into a clean, appropriate port on the pump head or manifold.
• Tighten to the manufacturer’s recommended torque to create a secure, leak-free seal.
• Verify that cut-in and cut-out events occur within the intended pressure window during commissioning.
• Once set, the switch manages pump cycling automatically with no operator input.

Maintenance & Service Life

Low-Maintenance, Long-Running Control

The AL693 is designed for minimal upkeep:

• Periodically inspect threads and electrical connections to confirm they remain clean, dry, and undamaged.
• Sealed internal components protect against corrosion, dust, and water ingress, reducing maintenance needs.
• The brass housing helps dissipate heat generated during long pump runs, preserving calibration and extending service life.

Its high sensitivity and fast response help maintain consistent outlet pressure, improving cleaning quality
while extending the life of downstream components.

Typical Applications

• Automotive and truck wash centers with medium- to high-flow pressure washer systems.
• Industrial wash bays and equipment cleaning stations.
• Construction and rental equipment maintenance rigs.
• Agricultural cleaning systems for machinery, barns, and processing facilities.
• Commercial and residential high-pressure washers needing automatic pump control and protection.

AL693 Mini Pressure Switch | 3/8 in Male, Compact AL Series

The AR AL693 Mini Pressure Switch – 3/8 in Male provides compact, automatic pressure
regulation for higher-flow pressure washer systems. With its brass housing, precision-calibrated diaphragm,
and robust 3/8 in threaded connection, it delivers steady pump cycling, safe operation, and consistent spray
performance in demanding environments.

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regulation, pump start/stop control, leak-resistant fitting, pressure washer systems, high-pressure cleaning
equipment