Manual Turbine Multi-level Hard Sealed Butterfly Valve D343W/D343H/D343Y

The valve body of the D343W/D343H/D343Y manual turbine multi-level hard seal butterfly valve is manufactured using an integrated casting process, with materials such as WCB,CF8,CF8M and other special metal non-metallic materials. The valve internals are generally selected according to the main material and various welding, flange, wafer and clamp types can be selected for pipeline connection. It adopts a precision J-shaped elastic sealing ring and a triple eccentric multi-level metal hard sealing structure, It is widely used in industrial pipelines such as metallurgy, electricity, petrochemicals, water supply and drainage, and municipal construction with a medium temperature ≤ 425 ℃. It can be suitable for media such as water, steam, oil, powder, etc., and can be used for regulating flow rate and carrying fluid.

Application scope:
Widely used for regulating and intercepting fluid pipelines in hydropower, sewage, construction, air conditioning, petroleum, chemical, food, medicine, light textile, paper making, water supply and drainage etc.
Product features:

1. The metal hard sealed butterfly valve adopts a triple eccentric sealing structure, with almost no wear on the valve seat and butterfly plate, and has a sealing function that becomes tighter and tighter as it becomes more visible.
2. The sealing surface of the butterfly plate is made of cobalt based hard alloy by overlay welding, which is wear-resistant and has a long service life.
3. The sealing ring is made of stainless steel, which has the dual advantages of metal hard sealing and elastic sealing. It has excellent sealing performance in both low and high temperature conditions, corrosion resistance, and long service life.
4. The large-sized butterfly plate adopts a quilted frame structure, which has high strength, large over current area, and low flow resistance.
5. The metal hard sealed butterfly valve has a bi-directional sealing function, which is not limited by the flow direction of the medium or the influence of spatial position during installation. It can be installed in any direction.
6. The driving device can be installed at multiple workstations (rotating 90°or 180°), making it convenient for users to use.

Product execution standards:
Design specification: GB/T12238
Structural length: GB/T12221
Flange connection: GB/T9113
Testing and Inspection: GB/T13927
Product identification: GB/T12220

Product performance parameter:

Product external structural connection size:

Installation precautions:

1. Before installation, the specifications, pressure, temperature and corrosion resistance of the butterfly valve should be checked to ensure that they meet the requirements for use. Each component should be checked for damage or looseness.
2. This butterfly valve can be installed on pipelines at any angle and should be closed for installation; When welding pipeline flanges, the valve sealing port should be blocked with a plate to prevent particles and debris from damaging the sealing surface. After welding, remove the valve, clean the valve sealing surface and pipeline cavity, and then install and fix the valve.
3. Please pay attention to the pressure direction when installing when the valve is closed.
4. Before installation, the sealing surfaces (sealing surfaces at both ends, butterfly plate sealing surfaces, and valve seat sealing surfaces) should be thoroughly wiped clean to remove dust and dirt.
5. Before installation, the butterfly valve should be air tested, with flexible opening and closing, and the opening and closing positions should match the indicated positions of the pointer.
6. Manually operate clockwise to close and counterclockwise to open. Do not apply force to open or close the valve after the pointer indicates it is in place.
7. When conducting pressure tests on valves, it is not allowed to use a single flange for installation and pressure testing. Double flange installation and pressure testing must be used. The test pressure should comply with the provisions of GB/T13927-92 standard.
8. When tightening bolts, they should be tightened symmetrically and alternately, and individual tightening in sequence is not allowed.
9. The limit screw has been adjusted before leaving the factory and should not be easily adjusted. If the drive device is configured as electric or pneumatic, please refer to the accompanying drive device manual.
10. The opening and closing stroke of the control mechanism has been adjusted when the electric butterfly valve leaves the factory. To prevent incorrect direction when the power is turned on, the user should manually turn it on to the half open position before the first power connection, then press the jog switch, and check that the direction of the indicator panel is consistent with the direction of the valve opening.
11. If the valve is found to have abnormal opening and closing, the cause should be identified for repair and elimination to prevent damage to the valve caused by using force to open and close the valve.