Advantages and Disadvantages of Valve Actuators
A valve actuator is the mechanism for opening and closing a valve. Manually operated valves require someone in attendance to adjust them using a direct or geared mechanism attached to…
What is Manual Call Point (MCP) ?
Manual Call Point is a device for the manual initiation of an alarm. Manual fire alarm activation is typically achieved through the use of a pull station (term used in USA…
What are Linear Heat Detectors?
Linear Heat Detection (LHD) (also known as Linear Detection Wire or Linear Heat Detection Cable or Linear Heat) is a very commonly used method of fire detection. It can detect…
What is Gas Leak Detection System ?
This article refers to issues surrounding the detection of leaks and gases and what type of containment Gas Leak Detection System have been designed to manage unplanned releases. A gas…
What is Mixing or Diverting Valve ?
Another style of globe valve body is the three-way body, sometimes called a mixing or a diverting valve. This valve design has three ports on it, with the plug (in…
What is Cage-guided Globe Valve ?
A more modern version of the globe valve design uses a piston-shaped plug inside a surrounding cage with ports cast or machined into it. These cage-guided globe valves throttle flow…
What is Double-ported Globe Valve ?
Some globe valves use a pair of plugs (on the same stem) and a matching pair of seats to throttle fluid flow. These are called double-ported globe valves. Double-ported Globe…
What is Port-guided Globe Valve ?
Another variation on the globe valve design is the port-guided globe valve, where the plug has an unusual shape, projecting into the seat. Thus, the seat ring acts as a…
Fire and Gas system Audible and Visual Alarms
A fire alarm system has a number of devices working together to detect and warn people through visual and audio appliances when smoke, fire, carbon monoxide or other emergencies are…
What is Keyphasor ? How does Keyphasor works ?
A transducer that produces a voltage pulse for each turn of the shaft, called the Keyphasor. This keyphasor signal is used primarily to measure rotating shaft speed and serves as…
