|Part name||Investment casting ductile iron||carbon steel||Stainless steel|
|Body, bonnet, disc||QT400||WCB||CF8||CF8M||CF3||CF3M|
|lining layer||PTFE(F4)FEP(F46)PFA(Soluble PTFE)、PE（Ultra high molecular weight polyethylene Daniel）PO（Polyolefin）|
|Diaphragm||FEP(F46)、CR(Chloroprene rubber)、PFA(Soluble polytetrafluoroethylene)、FPDM（Ethylene propylene rubber）|
[Technical parameter ]
|Design and manufacture||GB/T 12235|
|Structural length||GB/T 1221 HG/T 3704-2003、ASME B16.10|
|Flange dimension||HG20592-97、ANSI B16.5a|
|Structural style||Weir type and direct current type|
|Drive mode||Manual, pneumatic, electric|
|Pressure test||GB/T13927 API 1598|
1, The difference between the maximum lining diaphragm valves and other valve on the structure by stuffing; fluorine diaphragm diaphragm can make the corrosive medium in the channel and all drive components in a completely isolated, so as to prevent the valve is usually the "run, run, drip, leak and other defects.
2, Due to the smooth flow of the diaphragm valve, flow resistance is small, so you can get larger flow.
3, Fluorine diaphragm valve body cavity for all fluorine F56 lining. Therefore, it has superior corrosion resistance characteristics.
4, Because the seal is a flexible PTFE diaphragm. As a result, it has better sealing ability and minimum closing force.
5. The valve consists of valve body, bonnet, valve, stem, diaphragm, and other drive parts.
6, Valve opening and closing is achieved by rotating handwheel. The valve is marked on the top of the valve cover to see the opening or closing position of the valve to indicate the opening and closing stroke of the valve. When the hand wheel is placed clockwise, the handwheel is moved down, the valve then drives the diaphragm down, and the path is cut off; on the contrary, the valve is opened, and the color does not appear.
7, The valve adopts standards: in accordance with the provisions of GB12239, and comply with BS5156 standards.