A lever valve is a simple device used in plumbing systems to shut off the flow of liquid, gas, or sewage. It consists of a lever, valve housing, and a ball. Lever valves are ideal for emergency shutoffs and require only a quick 90-degree turn to shut off the flow. They are also easily visible in an emergency situation.
A toggle valve is a simple device installed in plumbing systems that provides for the quick and easy shut-off of the flow of liquid, gas or sewage through the plumbing system. The lever is the external component of the valve that is moved perpendicular to the pipe to fully close the valve. The valve itself is actually a ball valve; the term “lever valve” refers to the control mechanism.
All hydraulic systems require valves to regulate the flow through its components. When a valve is fully open, substance flows through it unimpeded; when a valve is closed, the passage is completely blocked. Many valves are designed to allow the user to regulate the flow with a high degree of accuracy; for example, the valves most people are familiar with, the hot and cold water faucets on sinks, generally allow users to open the valve to any desired level. When controlled by circular controls such as wheels, it can take many full circle turns to fully open or close the valve.
In addition to the valves that control the flow out of the system, most hydraulic systems contain a number of valves that regulate the flow within the system. In a common home plumbing system, one of the main reasons for such valves is to facilitate system maintenance and repair work. For example, if there is a leak in the system, it needs to be fixed, which requires shutting off the flow to the area where the leak occurred. A lever valve is an excellent emergency shutoff valve because it requires only a quick 90 degree turn of the lever to shut off the flow. When lever valves have been installed in strategic locations within the system, it is possible to isolate a portion of the system for maintenance and repair without shutting down the entire system.
A lever valve consists of a lever, which is the external control mechanism, the valve housing, and a ball through which a hole or port has been cut. The valve housing is wider than the tube it is installed in and contains a cavity within which the ball fits snugly. The alignment of the hole in the ball is controlled by the lever and when the hole in the ball lines up with the openings at the end of the valve housing, the substance in the pipes flows unhindered. Rotating the ball 90 degrees, so that the hole in the ball is perpendicular to the valve openings, completely shuts off the flow through the pipe.
Other types of valves, such as gate valves that typically operate faucets and window sills, are not well suited to the task of shutting off flow through a system quickly because they are designed to modulate flow incrementally and require many full turns to completely shut off the flow. flow. Also, lever valves are constructed with the lever parallel to the flow when open and perpendicular to the flow when closed. Therefore, the state of a lever valve – open or closed – is easily seen, which could be of paramount importance in an emergency situation, when valuable time could be lost trying to determine the state of a valve with a control mechanism. circular.
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