Pneumatic control valve installation techniques and operating procedures

1. Observe the correct installation techniques Always observe the installation instructions and cautions of the manufacturer of the control valve (control valve). Here's a brief summary of typical installation instructions. 2. Read the instruction manual Before installing the valve, read the instruction manual. The instruction manual describes the product and the safety precautions that should be observed before and during installation. Following the guidelines in this manual will help ensure ease of installation and success. 3. Confirm that foreign objects in the pipe cleaning line may damage the sealing surface of the valve or even obstruct the movement of the spool, ball or disc causing the valve to not close properly. In order to reduce the possibility of dangerous situations, it is necessary to clean all the pipes before installing the valve. Make sure to remove pipe dirt, metal debris, welding slag and other foreign objects. In addition, inspect the pipe flange to ensure that there is a smooth gasket surface. If the valve has a threaded end, apply a high grade pipe sealant to the male thread of the pipe. Do not apply sealant to the female thread because the excess sealant on the female thread will be squeezed into the body. Excess sealant can cause the cartridge to jam or build up dirt, which can cause the valve to not close properly. 4. CHECKING THE CONTROL VALVE (CONTROL VALVE) Although the valve manufacturer will take certain steps to prevent shipping damage, such damage may still occur and may be detected and reported prior to installation. Do not install valves that are already known to have been damaged during transport and storage. Before installation, inspect and remove all shipping stops, protective plugs or covers on the gasket surface and inspect the inside of the body to ensure that no foreign objects are present. 5. With Good Pipe Practice Most control valves (control valves) can be installed in any position, however, the most common method is to place the actuator vertically and at the top of the valve. If horizontal installation by an implementing agency is necessary, consider adding an additional vertical support to the implementing agency. Ensure that the valve body is installed so that the flow of fluid matches the direction indicated by the flow arrow or instruction manual. 6. Make sure that there is enough space above and below the valve for easy removal of the actuator or valve plug during inspection and maintenance. The spatial distance can usually be found on the dimensional drawing approved by the valve manufacturer. For flanged valve bodies, make sure that the flange faces are properly aligned so that the gasket surface contacts evenly. After the flange is centered, gently tighten the bolts and finally tighten the bolts in a staggered pattern (Figure 8-2). Correct tightening avoids creating uneven gasket loads and helps prevent leaks and helps avoid the possibility of flange damage or even cracking. This precaution is of particular importance when the connecting flange and the valve flange are made of different materials. The pressure pipes installed upstream and downstream of the control valves (control valves) help to check the flow or pressure drop. Connect the pressure piping to the straight pipe section away from the elbow, reducing the diameter or expanding the diameter. This location minimizes inaccuracies due to fluid turbulence. Use 1/4 or 3/8 in. (6-10 mm) tubing to connect the pressure port on the actuator to the control. Maintain a short connection distance and minimize the number of fittings and elbows to reduce system time lag. If this distance must be long, a positioner or supercharger can be used on the control valve (control valve). This article Keywords: regulating valve

Titanium Dioxide(TIO2)

Titanium dioxide is an important inorganic chemical pigment, the main component is titanium dioxide. The production process of titanium dioxide has two process routes: sulfuric acid method and chloride method. It has important applications in coatings, inks, papermaking, plastics and rubber, chemical fiber, ceramics and other industries.

It has two types: rutile type (Rutile R type) and anatase type (Anatase A type). The rutile crystal structure is compact, relatively stable, and has low optical activity, so it has good weather resistance, and has high hiding power and decolorizing power.

Titanium dioxide is widely used in coatings, plastics, rubber, ink, paper, chemical fiber, ceramics, daily chemicals, medicine, food and other industries.
The coating industry is the largest user of titanium dioxide, especially Rutile Titanium Dioxide, most of which is consumed by the coating industry. The paint made of titanium dioxide has bright colors, high hiding power, strong tinting power, low dosage, and many varieties. It can protect the stability of the medium, and can enhance the mechanical strength and adhesion of the paint film to prevent cracks. Prevent the penetration of ultraviolet rays and moisture, and extend the life of the paint film.
The plastics industry is the second largest user. Adding titanium dioxide to plastics can improve the heat resistance, light resistance, and weather resistance of plastic products, improve the physical and chemical properties of plastic products, enhance the mechanical strength of the products, and extend the service life.
The paper industry is the third largest user of titanium dioxide. As a paper filler, it is mainly used in high-grade paper and thin paper. Adding titanium dioxide to the paper can make the paper have better whiteness, good gloss, high strength, thin and smooth, no penetration during printing, and light weight. Titanium dioxide for papermaking generally uses Anatase Titanium Dioxide without surface treatment, which can act as a fluorescent whitening agent and increase the whiteness of paper. However, laminated paper requires the use of surface-treated rutile titanium dioxide to meet the requirements of light resistance and heat resistance.
Titanium dioxide is also an indispensable white pigment in advanced inks. The ink containing titanium dioxide is durable and does not change color, has good surface wettability and is easy to disperse. The titanium dioxide used in the ink industry has rutile type and anatase type.
The textile and chemical fiber industry is another important application field of titanium dioxide. Titanium dioxide for chemical fiber is mainly used as a matting agent. Since the anatase type is softer than the gold red type, the anatase type is generally used. Titanium dioxide for chemical fiber generally does not require surface treatment, but in order to reduce the photochemical effect of titanium dioxide and prevent the fiber from degrading under the action of titanium dioxide photocatalysis, surface treatment is required for some special varieties.
The enamel industry is an important application field of titanium dioxide. The enamel grade titanium dioxide has high purity, good whiteness, fresh color, uniform particle size, strong refractive index and high color reducing power, and has strong turbidity and Opacity, make the coating thin, smooth and strong acid resistance after enamelling. It can be evenly mixed with other materials in the enamel manufacturing process, does not agglomerate, and is easy to melt.
The ceramic industry is also an important application field of titanium dioxide. Ceramic grade titanium dioxide has high purity, uniform particle size, high refractive index, excellent high temperature resistance, and does not change ash at 1200°C for 1 hour. High opacity, thin coating, light weight, widely used in ceramics, construction, decoration and other materials.

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