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PQ340F-300LB Eccentric semi-ball valve
One half of an eccentric valve advantages under:
1. The fluid resistance is small, its resistance coefficient with section of equal length.
2. Simple structure, small volume, light weight.
3. Compact and reliable, the widespread use of plastic ball valve sealing surface of materials, good sealing, also has been widely used in the vacuum system.
4. Easy to operate, open and close quickly, from open to close just rotate 90 °, is advantageous for the remote control.
5. Easy maintenance, simple structure of ball valve, sealing ring, which generally remove replacement is more convenient.
6. In the fully open or fully closed, the ball and seat sealing surface and the dielectric isolation, medium through, can not cause the valve sealing surface erosion.
7. Applicable scope is wide, size from small to several millimeters, big to a few meters, from high vacuum to high pressure can be applied.
High location can be divided into straight-through ball valve according to the passage, three general formula and right Angle type.Two kinds of ball valves for distribution after the medium and change the flow of medium.Three type ball valve installation and maintenance should be paid attention to the following:
1. To have the position of the valve handle rotation.
2. Cannot be used for throttling.
3 belt drive mechanism of ball valve should be installed upright.
2, the working principle of eccentric half ball valve
By rotary valve chain to keep the valve open or occlusion.Ball valve switch lightweight, small size, can make it big caliber, reliable sealing, simple structure, convenient maintenance, sealing surface and the spherical often in the closed state, not easily be medium erosion, has been widely used in various industries.
Three, half of an eccentric valve in the pipeline
, distribution, and change the flow direction of medium.Ball valve is widely used in recent years a new type of valve, it has the following advantages:
1. The fluid resistance is small, its resistance coefficient with section of equal length.
2. Simple structure, small volume, light weight.
3. Compact and reliable, the widespread use of plastic ball valve sealing surface of materials, good sealing, also has been widely used in the vacuum system.
4. Easy to operate, open and close quickly, from open to close just rotate 90 °, is advantageous for the remote control.
5. Easy maintenance, simple structure of ball valve, sealing ring, which generally remove replacement is more convenient.
6. In the fully open or fully closed, the ball and seat sealing surface and the dielectric isolation, medium through, can not cause the valve sealing surface erosion.
7. Applicable scope is wide, size from small to several millimeters, big to a few meters, from high vacuum to high pressure can be applied.Ball rotated 90 degrees in the inlet and outlet should be completely present spherical, thereby blocking flow.
Eccentric ball valve is a relatively new type of ball valve type, it has its own unique structure some advantages, such as switch frictionless, seal is not easy to wear and open-close torque is small.Which can reduce the distribution of the specifications of the actuator.With multi-turn electric actuators, which can realize to adjust the medium and carefully cut off.Widely used in the & # 91;The wiki & # 93;Oil & # 91;/ wiki & # 93;, & # 91;The wiki & # 93;Chemical & # 91;/ wiki & # 93;Strict, urban water supply and drainage and other cutting conditions.
Four and half of an eccentric valve working principle is as follows:
A, open the process
1 in the closed position, the sphere by the stem of the & # 91;The wiki & # 93;Mechanical & # 91;/ wiki & # 93;Pressure effect, press on the seat.
2 when turn the handwheel counterclockwise, the valve stem is reverse movement, the Angle at the bottom of the plane to make the ball off the seat.
3 stem continue to ascend, and valve stem guide pin of interaction in the spiral groove, the sphere began to rotate without some friction.
Until 4 to full open position, the valve stem to limit position, sphere rotation to the full open position.
B, the closing process
1 closing, rotating the handwheel clockwise, stem began to drop and the ball left seat begin to spin.
2 continue to rotate the handwheel, the valve stem is embedded in the spiral groove on the role of the guide pin, the stem and ball rotate 90 ° at the same time.
3 is close to closing, the sphere has been without contact with the valve seat rotated 90 °.
4 wheel rotation of the last few laps, stem mechanically wedge Angle at the bottom of the plane to the oppression of a sphere, make its strong pressure on the seat, to completely seal.
Five, half of an eccentric valve structure features:
1, the opening and closing without friction.This function completely solve the traditional & # 91;The wiki & # 93;Valve & # 91;/ wiki & # 93;Because the problem of rubbing against each other and affect the sealing surface.
2, the structure of the jacket type.The valve can be directly mounted on the pipeline online inspection and maintenance, can effectively reduce the parking device, reduce the cost.
3, single seat design.To eliminate the influence due to abnormal pressure valve lumen medium use safety problems.
4, low torque design.Special structure design of the valve stem, only with a small hand could easily open/close the valve.
5, wedge seal structure.Valve by valve stem provides mechanical force, wedge pressure the ball into the seat and seal, make the valve's sealing is not affected by changes in the pipeline pressure difference, under various conditions sealed performance has a reliable guarantee.
6, the structure of the sealing surface of self-cleaning.When the ball tilting away from the seat, fluid in the pipeline along the sphere uniform sealing surface into 360 ° through, not only eliminates the high velocity on the seat of local scour, also washed away by the accumulated on the surface of the sealing material, achieve the goal of the clean.
Product use
Half of an eccentric valve is suitable for wastewater treatment, pulp, alumina, city heating heating to the tightness of occasions;Apply to power plant, the control of hydraulic slag or gas pipelines.
1. The fluid resistance is small, its resistance coefficient with section of equal length.
2. Simple structure, small volume, light weight.
3. Compact and reliable, the widespread use of plastic ball valve sealing surface of materials, good sealing, also has been widely used in the vacuum system.
4. Easy to operate, open and close quickly, from open to close just rotate 90 °, is advantageous for the remote control.
5. Easy maintenance, simple structure of ball valve, sealing ring, which generally remove replacement is more convenient.
6. In the fully open or fully closed, the ball and seat sealing surface and the dielectric isolation, medium through, can not cause the valve sealing surface erosion.
7. Applicable scope is wide, size from small to several millimeters, big to a few meters, from high vacuum to high pressure can be applied.
High location can be divided into straight-through ball valve according to the passage, three general formula and right Angle type.Two kinds of ball valves for distribution after the medium and change the flow of medium.Three type ball valve installation and maintenance should be paid attention to the following:
1. To have the position of the valve handle rotation.
2. Cannot be used for throttling.
3 belt drive mechanism of ball valve should be installed upright.
2, the working principle of eccentric half ball valve
By rotary valve chain to keep the valve open or occlusion.Ball valve switch lightweight, small size, can make it big caliber, reliable sealing, simple structure, convenient maintenance, sealing surface and the spherical often in the closed state, not easily be medium erosion, has been widely used in various industries.
Three, half of an eccentric valve in the pipeline
, distribution, and change the flow direction of medium.Ball valve is widely used in recent years a new type of valve, it has the following advantages:
1. The fluid resistance is small, its resistance coefficient with section of equal length.
2. Simple structure, small volume, light weight.
3. Compact and reliable, the widespread use of plastic ball valve sealing surface of materials, good sealing, also has been widely used in the vacuum system.
4. Easy to operate, open and close quickly, from open to close just rotate 90 °, is advantageous for the remote control.
5. Easy maintenance, simple structure of ball valve, sealing ring, which generally remove replacement is more convenient.
6. In the fully open or fully closed, the ball and seat sealing surface and the dielectric isolation, medium through, can not cause the valve sealing surface erosion.
7. Applicable scope is wide, size from small to several millimeters, big to a few meters, from high vacuum to high pressure can be applied.Ball rotated 90 degrees in the inlet and outlet should be completely present spherical, thereby blocking flow.
Eccentric ball valve is a relatively new type of ball valve type, it has its own unique structure some advantages, such as switch frictionless, seal is not easy to wear and open-close torque is small.Which can reduce the distribution of the specifications of the actuator.With multi-turn electric actuators, which can realize to adjust the medium and carefully cut off.Widely used in the & # 91;The wiki & # 93;Oil & # 91;/ wiki & # 93;, & # 91;The wiki & # 93;Chemical & # 91;/ wiki & # 93;Strict, urban water supply and drainage and other cutting conditions.
Four and half of an eccentric valve working principle is as follows:
A, open the process
1 in the closed position, the sphere by the stem of the & # 91;The wiki & # 93;Mechanical & # 91;/ wiki & # 93;Pressure effect, press on the seat.
2 when turn the handwheel counterclockwise, the valve stem is reverse movement, the Angle at the bottom of the plane to make the ball off the seat.
3 stem continue to ascend, and valve stem guide pin of interaction in the spiral groove, the sphere began to rotate without some friction.
Until 4 to full open position, the valve stem to limit position, sphere rotation to the full open position.
B, the closing process
1 closing, rotating the handwheel clockwise, stem began to drop and the ball left seat begin to spin.
2 continue to rotate the handwheel, the valve stem is embedded in the spiral groove on the role of the guide pin, the stem and ball rotate 90 ° at the same time.
3 is close to closing, the sphere has been without contact with the valve seat rotated 90 °.
4 wheel rotation of the last few laps, stem mechanically wedge Angle at the bottom of the plane to the oppression of a sphere, make its strong pressure on the seat, to completely seal.
Five, half of an eccentric valve structure features:
1, the opening and closing without friction.This function completely solve the traditional & # 91;The wiki & # 93;Valve & # 91;/ wiki & # 93;Because the problem of rubbing against each other and affect the sealing surface.
2, the structure of the jacket type.The valve can be directly mounted on the pipeline online inspection and maintenance, can effectively reduce the parking device, reduce the cost.
3, single seat design.To eliminate the influence due to abnormal pressure valve lumen medium use safety problems.
4, low torque design.Special structure design of the valve stem, only with a small hand could easily open/close the valve.
5, wedge seal structure.Valve by valve stem provides mechanical force, wedge pressure the ball into the seat and seal, make the valve's sealing is not affected by changes in the pipeline pressure difference, under various conditions sealed performance has a reliable guarantee.
6, the structure of the sealing surface of self-cleaning.When the ball tilting away from the seat, fluid in the pipeline along the sphere uniform sealing surface into 360 ° through, not only eliminates the high velocity on the seat of local scour, also washed away by the accumulated on the surface of the sealing material, achieve the goal of the clean.
Product use
Half of an eccentric valve is suitable for wastewater treatment, pulp, alumina, city heating heating to the tightness of occasions;Apply to power plant, the control of hydraulic slag or gas pipelines.
