Butterfly valve with tamper switch.
· Commonly used in fire protection .Dual electronic supervisory tamper switch
for connection to fire control panel and auxiliary device (e.g., bell or horn)
·
A tamper switch is a mechanical and electrical device
connected to a fire protection valve that signals a warning if the valve
partially or fully closes.
Most Common Fire Protection Tamper Switches
Regardless of the type of tamper switch, they all
function similarly. The tamper switch features an actuating unit, usually a
lever or cable with a resting position
·
When the valve closes, the actuating unit breaks an electrical
circuit which triggers a signal. Think of it like a light bulb: when the light
switch is on, a circuit is formed and the bulb shines brightly. When the switch
is turned off - or, in the case of a fire protection tamper switch, the valve
closes - the circuit is broken. For tamper switches, this broken circuit
creates a signal. In most jurisdictions this does not mean the fire alarm goes
off, though check with your Authority Having Jurisdiction to make sure of your
local rules, but rather the tamper switch sends the signal to a fire control
panel which creates a record of the incident.
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