By way of a linear motion, a manual operated sleeve valve is capable of regulating a product flow. This exposes the number of outlets on a sleeve, required for the correct rate of flow for a material being processed. The valve has a casing of a flange shape at both ends and when used in a manual capacity, it is generally regulated with a handle or a wheel.
An application involving a control sleeve valve is enabled by the incorporation in the sleeve design of multiple tapered outlets. These outlets are designed in a manner which causes water streams to be directed towards a point at the center of a downstream discharge pipe. The sleeve valve is designed for operation in a flow range, without damage to cavitations for the specified conditions.
A benefit to users is the simplicity in design of a manual sleeve valve, which is a factor, related to minimum downtime and low maintenance costs. Low maintenance is assisted by the inner sleeve being the only part of the valve subject to wear. Otherwise, the valve does not possess any mechanical parts and the use of an actuator is not required. Many applications require that the material or fluid flow is regulated or throttled at a certain point, between full flow and a minimum rate. It is a process that could be achieved with control pinch valves by the introduction of flow resistance, or by-passing.
A manual pinch valve has the ability and beneficial operating feature of being able to connect directly to a closing mechanism and ensure a forced opening. It is an action achieved by what is generally called opening tabs. The watering of a garden or washing of an automobile follow the principle operation of a manual operated pinch valve, by the simple process of compressing the pinch between the fingers and shutting off the water.
The processing of many and varied substances from the thinnest of gases to radio active materials, is possible with a control pinch valve. This is a recognized valve used in continuous industrial service, in varying applications including the processing of highly corrosive chemicals, hot steam and abrasive slurries. In addition to the valve’s capabilities in processing difficult materials, is that the manual operated pinch valve is capable of operating in extreme variations of temperature.
Various accessories are available for use with a control pinch valve such as positioners and pressure regulators, among others. A check valve definition could be a two-port component, as it has two openings in the casing for the entry and exit of a material flow. Manual pinch valves are used in many and varied applications, widely recognized as a part of everyday household equipment.
In the world of offshore platforms in the oil and gas industries, industrial fittings and components are used in a variety of operations. Control pinch valves are an integral part of applications in these industries. They include sub-sea control systems and offshore production involving pipelines and as these types of operations require strict norms and measures, equipment and components must be manufactured to a high quality, providing reliable performances with the minimum of downtime.
Manual pinch valves are recognized for their excellent resistance to chemical and atmospheric agents, as well as having the capacity to perform in adverse weather conditions with a low maintenance factor. The full opening of this valve allows the fluid to flow in a direct line, with the collar of the pinch replacing the need for a gasket. This action at the same time helps in the maintaining of positive control over the fluid flow. A manual operated pinch valve is constructed with a casing, flanged or screwed at the ends, with an insert elastomer pinch. The closing of the valve, whether a screw type or flanged, is either by manual means or air pressure.
Manual operated pinch valves are finding greater influence in industries involving fibrous and corrosive applications. It is a valve highly suitable for these demanding applications, having the ability to serve as a means of blocking and closing easily. For users of the valves, a particular benefit is that it can be operated by a hand-wheel or automatically. The demand for manual pinch valves has been created by many industrial processing plants, finding the means to improve and be more effective in the controlling of production and operation related costs.
To meet demands of industrial specialized applications, the critically important inner sleeve of the valve is manufactured in a variety of elastomer compounds and qualities. Control pinch valves are recognized for their versatility in all forms of applications that require specific operating temperatures. The flow of fluids, liquid or gas, in a single direction is controlled by valves under various names. These may be identified as check valves, non-return valves or one-way valves. A manual rubber valve has a basic construction form, consisting of a body with a pipe connection and components for sealing functions, usually operated by an actuator.
The performance capabilities of the valves are added to by their ability to operate effectively with extreme pressures, which can vary between a high vacuum to pressures of thousands of pounds per square inch. The manual operated rubber valve is a component generally perceived as a common household item. However, it is highly regarded as an essential part of many industrial processes.
Control pinch valves by means of a handwheel are one of AKO UK Ltd’s leading products. Other products include pressure relief valves, air operated pinch valves, knife gate valves, butterfly valves and more. With over 25 years technical experience, AKO prides itself in pinch valve technology and after-sales backup and support. For more information please visit www.pinch-valve.com
By Charlotte Hupfield