PQ340Off-Center Hemisphere ValveOverview:
An eccentric hemisphere valve is a relatively new type of ball valve, featuring some superiorities of its own structure, such as frictionless operation, low wear on the seal, and a small torque for opening and closing. This allows for a reduction in the size of the actuator required. With a multi-revolution electric actuator, it can achieve precise adjustment and tight cut-off of the medium. It is widely applicable in industries requiring strict cut-off, such as oil, chemical, and urban water supply and drainage.
PQ340Off-center ball valveFeatures:
1Low fluid resistance, with a drag coefficient equal to that of a pipe segment of the same length.
2Simple structure, compact size, and light weight. It operates by using a rotating valve chain to open or close the valve. The ball valve is easy to switch, compact in size, and can be made in large diameters. It offers reliable sealing, simple structure, easy maintenance, and the sealing surface and ball surface are often in a closed state, making them resistant to erosion by the medium. It is widely used in various industries.
PQ340Off-center hemispherical valveUsage:
Distribute and alter the flow direction of the medium. The ball valve is a widely used new type of valve with the following advantages:
1Low fluid resistance, with the same drag coefficient as a pipe section of the same length.
2Simple structure, compact size, and light weight.
3Tight and reliable, ball valves commonly use plastics for their sealing surfaces, offering good sealing properties and are widely employed in vacuum systems.
4Easy to operate, quick to open and close, from fully open to fully closed in just one turn.90°Easy for remote control.
5Easier to repair; the ball valve structure is simple, with most sealing rings being removable, making it convenient for disassembly and replacement.
6．When fully open or fully closed, the sealing surfaces of the sphere and the valve seat are isolated from the medium. The medium passing through does not cause erosion of the valve sealing surface.
7Wide range of applications, from a few millimeters to several meters in diameter, and can be used from high vacuum to high pressure. Ball rotation90At times, the inlets and outlets should be entirely spherical to interrupt the flow.
Process of Use:
AProcess of activation
1At the closed position, the sphere is actuated by the valve stem.[wiki]Mechanical[/wiki]Pressure is applied, tightly pressing on the valve seat.
2When the handwheel is turned counterclockwise, the valve stem moves in the opposite direction, with its bottom triangular plane releasing the ball from the valve seat.
3The valve stem continues to rise and interacts with the guide pin within the valve stem's helical groove, allowing the ball to start rotating frictionlessly.
4Up to full open position, the valve stem is raised to the limit, and the ball rotates to the full open position.
BClosing Process
1When closing, rotate the handwheel clockwise, causing the valve stem to descend and the ball to start rotating away from the valve seat.
2Continue rotating the handwheel; the valve stem is actuated by a pin embedded in the spiral groove on it, causing both the valve stem and ball to rotate simultaneously.90°。
3 As it neared shutdown, the sphere rotated without contact against the valve seat.90°。
4A few turns of the handwheel mechanically wedges the triangular flat at the bottom of the valve stem against the ball, pressing it tightly against the valve seat for a complete seal.
Off-center hemispherical valveProduct Ordering Instructions:
1. Once the customer has confirmed the type and model of the valve (especially non-standard models), they should accurately describe the meaning and requirements of the model.
2. Customers should order based on the product models listed in the samples. If there are any special requirements for the product items, please specify them in the order.
1) Structural Length2Flange Standard3Valve structural types: such as full bore or reduced bore channels, body cover connection types4Valve internals and other material requirements5Pressure tests, inspection standards, labeling, and other requirements
3. When the application of the valve is critical or the environment is complex,Please provide design drawings and detailed specifications, and our experts will review and ensure they meet the standards.
4. Our company can customize electric devices according to specific customer requirements.,Pneumatic drive unit,Turbine unit.
5. Our company's valves of various types meet all the requirements specified in the order. Each product undergoes rigorous inspections and tests according to the relevant standards prior to shipment.
6. All products of Zhong Zhi Valves come with a warranty period: official installation and use by the customer12Within a month or upon product dispatch18Within a month.
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If you have any questions, please call:0577-57787659 13588912654】,We will always strive to provide you with the best service.
