PIUSI THERMAL PROTECTOR EXT 248-28 (EX50 & EX75) Part R18427000

Description

Piusi Thermal Protector EXT 248-28 (EX50 & EX75)

Part is original to Piusi.

Product Code: R18427000

The Piusi R18427000 is a critical safety and electrical component designed specifically for the EX50 and EX75 series of explosion-proof pumps. Functioning as the motor’s internal safeguard, this thermal protector monitors the temperature of the motor windings and automatically disconnects power if the unit exceeds safe operating limits.

As an essential part of the UL/ATEX-listed explosion-proof architecture, the R18427000 prevents the motor from overheating to a point where it could ignite flammable fuel vapors. It is a mandatory repair part for maintaining the safety certification and operational lifespan of your high-performance EX-series pump.

Key Features & Benefits

• Precision Thermal Monitoring: Calibrated specifically for the EXT 248-28 thermal profile. It provides a millisecond-fast response to “over-temp” conditions caused by excessive bypass running, dry running, or electrical surges.
• Explosion-Proof System Integrity: Designed to operate within the sealed motor housing without generating sparks. Replacing a failing protector with the genuine R18427000 ensures your pump remains compliant with Class I, Division 1 (UL) and Zone 1 (ATEX) safety standards.
• Automatic Reset Functionality: Once the motor cools down to a safe temperature, the protector typically resets, allowing the pump to return to service without a manual hardware reset (depending on the specific wiring configuration of the pump model).
• Protects Against Motor Burnout: By cutting power before the copper windings reach their “melt point,” this component saves the motor from catastrophic failure, turning a potential $500+ replacement into a simple, low-cost maintenance fix.
• Vibration-Resistant Lead Wires: Features high-quality, heat-resistant insulated leads designed to withstand the constant mechanical vibrations of a pump motor running at 3450 RPM.
• Genuine Piusi Spare Part: As an authentic Piusi R-Series component, the R18427000 is manufactured in Italy to the exact tolerances required for a “plug-and-play” fit within the EX50 and EX75 motor frames.

Technical Specifications

If your EX50 pump shuts down unexpectedly during a long fueling cycle and refuses to restart until it has cooled, your thermal protector is doing its job. However, if the pump fails to start at all or trips the circuit breaker immediately, the protector may have “tripped” permanently or reached the end of its service life. Replacing the Piusi R18427000 restores the factory-spec safety envelope, ensuring your team stays safe and your pump stays protected.