LEDE OS&Y Valve Supervisory Switch for 2″ to 16″ Gate Valves

Description
The LEDE Model OSYSU is a specialized supervisory switch designed to monitor the position of OS&Y type gate valves in fire protection systems. This switch is engineered to detect any movement of the valve’s rising stem; if the valve is closed even slightly, the switch sends an immediate signal to the fire alarm control panel.
Built with a rugged, die-cast housing and a synchronized switch mechanism, it eliminates the risk of “false alarms” while ensuring 100% reliability. Its universal design allows it to be mounted on any OS&Y valve ranging from 2″ (DN50) to 16″ (DN400), making it a versatile solution for large-scale fire safety projects.

Key Features
Universal Fit: Adjustable design compatible with all OS&Y gate valves from 2″ up to 16″ nominal size.
Dual Switch Protection: Contains two sets of SPDT (Form C) contacts for flexible wiring to fire panels and local bells.
Weatherproof Durability: NEMA 4 and IP67 rated enclosure, suitable for both indoor and outdoor installations.
Tamper Resistant: Includes security screws to prevent unauthorized removal or adjustment of the switch cover.
Easy Calibration: Features an adjustable trip rod that can be fine-tuned to the specific stroke length of the valve stem.
Safety Certified: Fully UL Listed and FM Approved for use in fire suppression monitoring.

Technical Specifications
Brand: LEDE
Model Number: OSYSU Series
Valve Size Range: 2″ to 16″ (DN50 – DN400)
Contact Rating: 10A @ 125/250 VAC; 2.5A @ 30 VDC
Enclosure Rating: NEMA 4, 4X & IP67 (Die-cast Aluminum)
Operating Temp.: -40?C to 60?C
Conduit Entrances: Two 1/2″ Knockouts provided
Switch Type: 2 sets of SPDT (Single Pole Double Throw)
Finish: Red Powder Coat (RAL 3000)
Certifications: UL, ULC, and FM Approved