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Manual and Control Pinch Valves and The Economy
by
Charlotte Hupfield
Reliable service is provided by manual pinch valves to many industries for a large variety of specialized applications. Due to their rugged construction, operations can be regarded as heavy duty and demanding of equipment. The pinch valve mechanism is reliable and enables long periods between servicing.
The performance of every control pinch valve relates to the inner sleeve or elastomer inside the casing. It is a valuable component which enables the valve to control substance and material flow and provide the facility of a bi-directional, drop tight shut-off. The sleeves, manufactured from flexible compounds, are determined by a particular application. In many instances, the elastomer compounds resemble pinch in their composition and texture. A sleeve composition is an essential part of any successful operation involving the valve. To meet the varied and increasing demands of their customers, manufacturers provide different options regarding the varieties of elastomer sleeves, available for manual operated pinch valves.
The manual pinch valve is efficient and effective. It operates by using a squeezing process, activated by mechanical means or an external actuator. In the case of a pneumatic operated design, the valve receives directly supplied compressed air or fluid. However, the inner pinch or elastomer sleeve is the decisive factor in a successful operation, with emphasis on the quality of the sleeve or elastomer. The service periods for manual operated pinch valves are in many ways determined by the valve’s compatibility with the application.
In the wide and varied operational capabilities of control pinch valves; there are various application fields of fibrous and corrosive applications. This variety of valve is well suited for these applications, thanks to their ability to serve as a means of blocking and closing with ease. The valve is versatile, providing the benefit of manual operation by a hand-wheel, or automatic means. Increasing industrial demand for this type of valve is related to process plants, created by their seeking to improve production control methods and labor related costs.
Where pressure reductions below the norm are required, such as in the control of pumps, a manual sleeve valve can be designed to meet these requirements. As the valve has a near linear flow characteristic, there will be a minimum loss of energy due to the reduction in cycle periods. At the same time, there will be a reduction in operational costs during the lifetime of the valve.
Recognized widely as a manual operated sleeve valve, it is used within many industries involving various applications related to the control of material flows. The ability of the valve to operate in areas where there is a need to dissipate excess energy from a reservoir outlet, makes this valve an important factor in many specialized operations. Their general service is in circumstances involving high-pressure reductions. A control sleeve valve is a method of release or discharge into the atmosphere to a submerged outlet, for example underwater.
The elastomer of a flow pinch is located within the casing of the valve. A plunger device with a pinching component is located adjacent to the flow pinch, attached to one end of the plunger. A specified platform is situated in a position opposite the pinching component. The elastomer of the control pinch valve can therefore be pinchd between the pinching component and the platform. This in turn, exerts control over the flow of fluid through the pinch.
In the designated range of pinch valves, a manual operated pinch valve is particularly adaptable for use within applications involving the control of fluids with relatively low viscosity. Forming part of the valve structure is a valve block, with a bore capable of receiving a flexible pinch. Linked transversely and directly to the bore is a channel, at the intersection of which is a defined pinch chamber. The pinching action of the valve is actuated by a piston rod and a free-floating ball component, situated between the rod end and the flexible manual pinch valve.
Utilized every day, is the manual operated pinch valve, often referred to as a Ball Valve. It is a valve designed for use within applications such as sprinkler systems, standpipe systems or as a manually operated deluge control valve. A manual pinch valve controls the flow of water to small open headed extinguishing systems and operates as a zone control valve. Any reduction in pressures and turbulence interference is minimized by large ports, which provide a straight-through flow of water. The installation of this valve system is simple, with conservation of space and the provision of visual indication during operating conditions.
The control pinch valve incorporates a variety of valves, among which are pressure regulating or control valves. An important operation of these valves is the automatic control of water pressure under flowing and static conditions. The water and its volume delivery rates at the outlet, depends on the control pressure within the system. A constant pressure is maintained within specified limitations, influenced by the pinch equipment used beyond this type of control pinch valve. General recommendations are that this type of valve is utilized when a system pressure exceeds 175Psi.
AKO UK Ltd is an industrial pinch valve stockist and distributor, offering manual and control pinch valves as well as
pneumatic operated pinch valves for the industrial sector.
Other products available include knife gate valves, pressure relief valves, aerator pads for silos, butterfly valves,
pinch valve sleeves for many applications
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Manual and Control Pinch Valves and The Economy