Basic knowledge of fluorine-lined diaphragm valve

Today, I will introduce some basic knowledge and characteristics of fluorine-lined diaphragm valve. The fluorine-lined diaphragm valve is a special form of shut-off valve. Its opening and closing part is a diaphragm made of soft material, which separates the inner cavity of the valve body from the inner cavity of the valve cover and the driving parts, so it is called a diaphragm valve. Principle of fluorine-lined diaphragm valve: The drive screw is driven by compressed air to make the valve core move up and down, and at the same time, the diaphragm is pulled up and down to close and open. Features: compact, simple, small size, beautiful appearance; the switch is guided, and the movement is stable; the closing torque is small, the service life is long, the diaphragm pressing can be automatically adjusted, the pressure is uniform, and the sealing is reliable; the diaphragm is installed in the valve core by pushing Into the type, easy to replace. Features: The outstanding feature is that the diaphragm separates the inner cavity of the lower valve body from the inner cavity of the upper valve cover, so that the valve stem, valve disc and other parts located above the diaphragm are not corroded by the medium, eliminating the need for packing and sealing structure, and will not produce medium outside. leak. 1. The diaphragm made of soft seals such as rubber or plastic has better sealing performance. Since the diaphragm is a wearing part, it should be replaced regularly according to the characteristics of the medium. 2. Limited by the diaphragm material, the diaphragm valve is suitable for low pressure and relatively low temperature occasions. 3. Diaphragm valves can be divided into six types according to their structure: house type, DC type, cut-off type, straight-through type, gate type and right-angle type; the connection form is usually flange connection; according to the driving mode, it can be divided into manual, electric and pneumatic There are three types, among which the pneumatic drive is divided into three types: normally open, normally closed and reciprocating. Installation and use: 1. Both ends of the passage of the stock valve must be sealed to prevent foreign matter from entering the inner cavity and damaging the sealing parts. And should avoid contact with oil or other flammable materials. 2. The metal processing surface of this valve should remove dirt and apply rust inhibitor. 3. Do not paint the surface of the rubber lining or rubber diaphragm with grease, so as not to cause rubber swelling and affect the service life of the valve. 4. During storage or out of use, the handwheel should be rotated counterclockwise to keep the valve in a slightly open state to prevent the diaphragm from losing elasticity due to long-term pressure. This is some basic knowledge about fluorine-lined diaphragm valves. If you have any questions, you can consult Lianke Valve Co.,Ltd., contact: +86-577-8585 9626 or.
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