Diaphragm valve

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Diaphragm valve

Product model:G41F46
Nominal diameter: DN25~DN150
Pressure range: 0.6~1.6MPa
Main material: steel PTFE (F4), FEP (F46) and PFA (soluble F4)
Service temperature: -20℃～180℃
Applicable medium: sulfuric acid, hydrochloric acid, nitric acid, and other corrosive media

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產(chǎn)品詳細(xì)

[Essential information]
Diaphragm valve is a special form of cut-off valve, appeared in 1920s. The opening and closing parts of the utility model are a diaphragm made of soft material, and the inner cavity of the valve body is separated from the inner cavity of the valve cover and the driving component, so that the diaphragm valve is called. Fluorine diaphragm is a special form of work with the cutting function valve, its opening and closing parts by steel valve with soft materials (rubber and fluorine plastic composite) for diaphragm and the inner cavity of the valve body and the valve cover cavity separated in order to achieve the purpose of cutting tube medium.

Main material list：

Part name	Investment casting ductile iron	carbon steel	Stainless steel
Part name	QT	C	P	R	PL	RL
Body, bonnet, disc	QT400	WCB	CF8	CF8M	CF3	CF3M
Stem	2Cr13	2Cr13	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）
Stem nut	ZCuAL10Fe3
Bolt	35	35	1Cr17Ni2	1Cr17Ni2	1Cr18Ni9	1Cr18Ni9Ti
Nut	45	45	0Cr18Ni9	0Cr18Ni9	0Cr18Ni9	0Cr18Ni9
Handwheel	A3

[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
Nominal pressure	0.6、1.0、1.6、Class150
Pressure test	GB/T13927 API 1598

[Valve features]

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.

[Adaptive condition]
Fluorine diaphragm valve is widely used in chemical, acid, alkali, metallurgy, rare earth, pesticides, dyes, medicine, papermaking, electroplating, electrolysis, pickling, radio, foil, scientific research institutions, national defense industry and other industries under different conditions of strong corrosive medium, and can replace the expensive rare metal valve.