Month: October 2021

1 Applicable safety regulations must be complied with.
2 Ensure that the pipeline is free of impurities before the valve is installed, otherwise it will cause damage to the valve.
3 Connect the valve and pay attention to aligning with the pipeline.
4 For all valves, the actuator must be disassembled before welding on the valve body.

Features and selection of diaphragm valve
(1) The fluid resistance is small.
(2) It can be used for the medium containing hard suspended solids; since the medium only contacts the valve body and the diaphragm, there is no need for stuffing box, there is no stuffing box leakage problem, and there is no possibility of corrosion to the valve stem.
(3) Suitable for corrosive, viscous, and slurry media.
(4) Cannot be used in high pressure occasions.

Diaphragm valve is a special form of shut-off valve. Compared with other valves, it has the following characteristics:

1.The elastic sealing opening and closing parts ensure that there is no internal leakage;

2.Streamlined flow channel makes pressure loss limited;

3. There is no packing, so there is no leakage;

1. The biggest difference between the fluorine-lined diaphragm valve and other valves is that it adopts a structure without a stuffing box; the fluorine-lined diaphragm valve diaphragm can completely isolate the corrosive medium in the flow path from all driving parts, thereby eliminating the usual valve The disadvantages of “running, risking, dripping, leaking” and so on.

Refer to straight through type DIAPHRAGM VALVES

1）DN 25, DN 32, DN 40, handwheel+bonnet+compressor+spare diaphragm totally same, size and shape and others are all same. But body different.
 
2） DN65 and DN80,  handwheel+bonnet+compressor+spare diaphragm totally same, size and shape and others are all same. But body different.

The valve stem of the diaphragm valve is sealed by a soft and pressure-bearing diaphragm that connects the valve stem to the closing member. As long as the diaphragm does not fail, this seal can prevent any medium from leaking to the atmosphere through the valve stem. The shape of the diaphragm can be a round cap shape or a bellows shape. The material structure of the diaphragm. Depending on the application, it can be made of rubber elastomer and plastic.

The structure and form of the diaphragm valve are not the same as the traditional valve. It is a cut-off valve in a special form. This cut-off valve is a special and new type of valve. People may know a lot about traditional valves, but they don’t know much about the new generation of diaphragm valves. For example, where is the diaphragm valve generally used, and what does it do? Next, explain and analyze where the diaphragm valve is generally used.

The structure of the diaphragm valve is very different from the general valve. It is a new type of valve and a special form of cut-off valve. Its opening and closing part is a diaphragm made of soft material. The inner cavity of the bonnet and the driving part are separated and are now widely used in various fields. Commonly used diaphragm valves include rubber-lined diaphragm valves, fluorine-lined diaphragm valves, unlined diaphragm valves, and plastic diaphragm valves.

1. This valve is composed of valve body, bonnet, valve stem, valve disc, diaphragm and driving parts.

2. The opening and closing of the valve is achieved by rotating the hand wheel. When the handwheel is rotated clockwise, the valve will drop to cut off the passage; otherwise, the valve will open.

3. When the diaphragm valve is used in the water vapor pipeline with the working temperature ≤120℃, the material of the diaphragm should be heat-resistant rubber, and indicate it when ordering.