Multi Turn Valve Operation

Pipelines are integrated into countless types of systems as efficient and effective ways of transporting liquid between two locations. When this liquid is being transported, it is often essential to have control over the amount of liquid that is moving through the system, as well as where it is going. A multi turn valve can help provide that type of control.

When a liquid reaches a certain intersection between pipelines, a multi turn valve can be installed to determine whether the liquid is able to continue past that point in the system. If a multi turn valve is in the closed position, then the liquid will be stopped upon reaching that point. The valve creates a seal between the two different pipe spaces, and when it is closed liquid remains in the pipeline without penetrating through the seal to the next area. A multi turn valve can be operated by turning a hand wheel, which is attached to a threaded stem. The threaded stem is capped by the actual disc that provides the seal between pipelines when the valve is shut. As the hand wheel is turned, the disc is lowered, and an opening is created between the two pipelines. Liquid is then able to pass through on either side of the valve as it continues through the rest of the pipe system.

One of the benefits of a multi turn valve is that it can be controlled and placed in very specific locations. Only a slight turn of the hand wheel will cause the disc to open a small amount, which may be all that is necessary if only a small volume of liquid is required during a moment of flow. For operations where a finite amount of control over liquid volume is required, a multi turn valve could be a good fixture to install, as it allows for accurate and stable positioning within very detailed parameters.

A multi turn valve is considered to be a linear motion valve. The changes in different positions that a multi turn valve can take can be attained accurately, although it may take several turns to get to the desired flow opening. This might take a little bit longer than the changes that some other valve types may allow, and a company needs to consider whether details regarding the positioning of the valve are more important than the speed with which the valve can attain those new positions. Different types of multi turn valves include gate valves, globe valves, fixed cone valves, needle valves, and pinch valves. All of these valves are available in a variety of different sizes, and a company can custom order the valve fixture that will be most appropriate in their particular piping system. Sizing is an important aspect of the valve ordering process, as an appropriately sized valve allows for the reliable seal to be created when flow is not desired and the valve is in the closed position. Careful planning will definitely yield more successful results.