Valve Position Supervisory Switch
This switch is engineered to integrate with a wide range of valve configurations, making it a versatile choice for modern industrial and commercial setups. Its heavy-duty, corrosion-resistant enclosure is built to endure extreme weather, dust, and temperature fluctuations, delivering consistent performance year-round. Designed with both installers and facility managers in mind, it balances straightforward deployment with advanced monitoring capabilities, making it a trusted tool for sustaining fire safety standards.
technical Specifications
| Feature | Specification Details |
| Switch Type | Valve Position Monitoring Switch |
| Enclosure Material | Die-cast metal base and cover,red powder coat finish |
| Operating Temp. | -40℃ to 60 ℃ (-40°F to 140°F) |
| Mounting | Adjustable bracket for OS&Y valves (1" to 12" sizes) |
| Conduit Entry | Single side entrance for 1/2" conduit |
| Contact Ratings |
OSYSU-1: One Set of SPDT (Form C) OSYSU-2: Two Sets of SPDT (Form C) 10.0 Amps at 125/250 VAC 2.0 Amps at 30VDC Resistive 10 mAmps minimum at 24 VDC |
| Weight | 798 g / 1.76 lb |
Key Features
Continuous Status Tracking: Maintains real-time oversight of valve stem position to catch anomalies instantly.
Durable Construction: Features a robust enclosure designed for longevity and resilience.
Weatherproof Design: Suitable for both indoor and outdoor installations in various environments.
Universal Compatibility: Designed to fit a wide array of valve sizes and types (specifically Outside Screw and Yoke valves).
Simple Installation: User-friendly design allows for straightforward mounting and wiring.
Versatile Contact Options: Available in single or dual switch configurations to meet specific system requirements.
Tamper-Resistant: Engineered to resist tampering, ensuring system integrity is maintained.
Installation & Operation
Installation of the supervisory switch is designed to be straightforward and non-invasive. The unique fork-style bracket mounts securely to the yoke of the OS&Y valve without interfering with the packing gland or the smooth operation of the valve itself.
Mounting: Position the metal fork assembly around the valve stem and secure it to the yoke using the provided saddle and bolts.
Adjustment: With the valve confirmed to be in the fully open position, engage the switch mechanism onto the stem. Use the fine adjustment feature to set the precise trip point.
Wiring: Connect the switch wiring to your building's monitoring panel via the designated conduit entrances. The terminals are clearly marked for easy connection verification.
Testing: Perform operational tests to confirm that closing the valve slightly triggers the intended alarm signal at the control panel.
Once installed, the switch provides continuous monitoring. The internal mechanism tracks the stem position. If the stem moves down more than the set threshold, the internal switch actuator changes position, breaking or making the electrical contact as required by the alarm circuit design.
Supervisory Switch is a vital component for monitoring the status of fire suppression control valves. It ensures that valves remain in the correct, fully open position, providing reliable alerts via a control panel if the position changes unexpectedly. This robust, weatherproof device is essential for maintaining system readiness and preventing potential failures.
Everything You Need to Know
Here are a few more FAQs about the Outside Screw and Yoke Valve Supervisory Switch.
Q: What does OS&Y stand for?
A:OS&Y stands for "Outside Screw and Yoke."
Q: How does the switch work mechanically?
A: The device operates when the valve stem rises or lowers. The valve stem engages a plate or bracket connected to the internal mechanism. When the valve moves toward a closed position, the bracket moves the actuator rod, triggering the internal microswitches.
Q: Is a special tool required for installation?
A: A standard wrench is used for installation, but the cover features tamper-resistant screws. A special key (provided with the unit) is required to remove the cover for wiring or inspection.
Q: Does this switch sound an actual fire alarm?
A: No, this is a supervisory switch, not an alarm initiating device. It triggers a specific "supervisory" signal on the fire alarm control panel, which alerts personnel that a critical valve position has changed and requires investigation, but it does not indicate a fire condition itself.
Hot Tags: supervisory switch, China supervisory switch manufacturers, suppliers, factory, fire safety accessories, foot valve for fire pump, types of fire alarm initiating devices
