How does a CLA-Val work?
Cla-Val Flow Control/Rate of Flow Control Valves prevent excessive flow by limiting flow to a preselected maximum rate, regardless of changing line pressure. The pilot control responds to the differential pressure produced across an orifice plate installed downstream of the valve.
What is fire protection valves?
Control Valves—What Are They? Control valves control the flow of water in an automatic fire sprinkler system. Therefore, it is critical they remain open to allow water flow to the sprinklers. According to the NFPA, closed valves are the main cause of sprinkler system failure.
How do you adjust a CLA valve?
To change pressure setting, turn the adjusting screw clockwise to increase pressure, counterclock- wise to decrease pressure. There must be liquid flowing through the valve during pressure adjustments. When the desired setting has been made, tighten jam nut and replace cover.
How does a pressure relief valve work on a fire engine?
The pilot valve manages the system by sensing discharge pressure and controls the opening and closing of the relief valve. The relief valve directs water from the discharge of the pump back into the intake of the pump when pressure surges occur.
What is the best valve for flow control?
For flow control applications where a ball valve is possible, such as filling a tank to a reasonable degree of accuracy, a trunnion or v-port ball valve design is usually the best choice.
What is a Siamese valve?
A siamese connection or splitter in fire protection engineering is a pipe fitting that allows two or more fire hoses to be connected to a single standpipe riser at the same general location.
What type of fire is class B?
Class B: Flammable liquids such as alcohol, ether, oil, gasoline and grease, which are best extinguished by smothering.
Why is it so important to have relief valves on a fire pump?
For all fire pump systems, except those using a cooling line to a diesel engine driven pump, a circulation relief valve should be fitted in order to extract heated water from the pump’s discharge.
How many types fire pump?
Common types of fire pumps used for fire service include: horizontal split case, vertical split case, vertical inline, vertical turbine, and end suction.