[US] advantage of a standard ball. Fluid resistance, its drag coefficient with the same pipe lengths are equal. 2. Simple structure, small size and light weight. 3. Close and reliable valve sealing surface material widely used plastic, sealing, and has also been widely used in the vacuum system. 4. Easy to operate, opening and closing rapidly, from fully open to fully closed as long as the rotation of 90 °, to facilitate remote control. 5. Easy maintenance, simple ball valve, seals are generally activities, the removal replacement is more convenient. 6. When fully open or fully closed, the sealing surface and the dielectric isolation ball and seat, through the media, will not cause erosion of the valve sealing surface. 7. Wide range of applications, from small diameter to a few millimeters to a few meters from high vacuum to high pressure can be applied. 3] [American Standard ball valve classified according to the structure can be divided into: a floating ball valve The ball valve is floating in the medium under pressure, the ball can produce a certain displacement and pressed at the outlet end of the sealing surface, guarantee outlet end seal. Simple floating ball valve structure, good sealing, but the ball all bear the load of the working medium to pass the exit ring, so to consider the ring material can withstand the work load of the media sphere. This structure is widely used in low-pressure valve. Second, the fixed ball valve ball is fixed, no movement after compression. All with a floating ball valve fixed valve seat, by medium pressure, the valve seat to move, so that the ball seals pressed on, in order to ensure the seal. Usually with the ball, the lower shaft with bearings, operating small torque, suitable for high pressure and large diameter ball valves. Third, elastic ball valve ball valve is elastic. Ball and seat ring are made of metal materials, sealing pressure than large, rely on the media itself has reached less pressure sealing requirements, must apply force. This valve is suitable for high temperature and high pressure media sphere. 4. [American Standard] Ball works A, an open process in the closed position, the mechanical effect of the ball by pressing the valve stem, pressed on the seat. 2 When the handwheel counterclockwise stem the reverse movement, its flat bottom corner to make the ball disengage the seat. 3 stem continues to rise, and the interaction between the valve stem and guide pin spiral groove, so that the ball began to rotate without friction. 4 up to the fully open position, the valve stem to the limit position, the ball rotated to the fully open position. B, when the shutdown process a closed hand wheel clockwise, the stem and the ball began to fall away from the seat starts to rotate. 2 continues to rotate the handwheel stem being embedded in the spiral groove on its role of guide pins, so the stem and ball while rotating 90 °. 3 is about to shut down, the sphere has been in the case of non-contact with the valve seat is rotated 90 °. The last four laps hand wheel rotation, angular plane mechanically wedge at the bottom of the stem to the oppression of the ball, making it tightly pressed on the seat, to be completely sealed. 5. Ball] [American Standard Features 1, open and close without friction. This feature completely solve the traditional [wiki] Valve [/ wiki] due to friction between the sealing surface and affect the sealing problem. 2, the coat structure. For valves installed in the pipe-line inspection and maintenance directly, can effectively reduce plant parking, and reduce costs. 3, single-seat design. Remove the valve due to abnormal pressure in the cavity medium affect the use of safety. 4, low torque design. Special structural design of the stem, just with a little hand can easily open and close the valve. 5, wedge-shaped sealing structure. The valve stem is provided by mechanical force, the ball onto the seat and wedge pressure seal, the valve seal is not affected by changes in pipeline pressure, sealing performance under various conditions have a reliable guarantee. 6, since the structure of the sealing surface clean. When the ball away from the seat tilt, the pipeline fluid along the sealing surface of a sphere through 360 ° uniform, not only eliminates the high velocity of the seat of local erosion, but also washed away the sealing surface accumulations reach self cleaning purposes . To reduce the valve operating torque and increase the reliability of the seals, valve seals appeared both pressure injection of a special lubricant between the sealing surface to form a layer of film that enhances the seal, but also reduce operating torque, more suitable for large diameter high pressure valve. 6. Ball] [American Standard Installation 1) Remove the protective cover on both sides of the flange end at the valve is fully open state to wash clean. 2) the signal should be required prior to installation (electric or gas) in the whole test (to prevent vibration from transport performance), after passing the wire installation (wiring by electric actuator wiring diagram). 3) Prepare the front pipe connections shall be flushed and cleaned of impurities remaining in the pipeline (these substances may damage the seat and ball). 4) During the installation, please do not use the actuator portion of the valve lift lifting points as to avoid damage to the actuator and accessories. 5) The class of valve should be installed in a horizontal or vertical direction of the pipe. 6) installed near the pipeline should not be downcast external force or phenomenon, you can use the pipe brackets or supports to eliminate deviation from the pipeline. 7) and pipe connections, please use the specified torque cross locking flange bolts. One, ① American Standard ball valve product name and model ② ③ caliber American Standard American Standard ball valve with an attachment so we can correct for your selection. Second, if the unit has been selected by the design firm Riverstone American Standard ball valve type, press the US standard valve model directly to our Sales Department Order.