Product overview
Pneumatic ceramic double gate valve, also known as pneumatic ceramic parallel double gate valve or dry ash valve, is a kind of ceramic gate valve. Therefore, its structure and working principle are consistent with the ceramic gate valve, and its opening and closing body (valve plate) is driven by the valve stem to the sealing surface of the valve seat for lifting movement, which can be connected or cut off the fluid channel. When the valve is partially opened, eddy current is generated on the back of the gate, which is easy to cause erosion and vibration of the gate, and it is also easy to damage the sealing surface of the seat, which is difficult to repair. It is usually suitable for working conditions that do not require frequent opening and closing, and keep the gate fully open or fully closed. The ceramic track bar arranged on the inside of the valve cover and the power spring arranged in the three-way valve core can effectively make the left and right gate plate move closely on the ceramic track bar without any leakage, so as to ensure the normal operation of the valve body. The utility model has simple structure and convenient installation and use.
Ceramic double gate valve is mainly used for dry powder material inlet, discharging and conveying pipeline, as a cut-off and connecting medium channel, as a warehouse pump discharge valve, balance valve, exhaust valve, blockage valve, can also be used as a pipeline switching valve and ash warehouse discharge valve, with good sealing performance, small starting load, less ash and ash accumulation phenomenon, wear resistance, long service life characteristics. Ceramic double gate valves are usually connected by flanges and can be divided into manual and electric drive modes. Specifically, the range of use of this series of products is: 1. Power plant ash removal - dry ash removal system; 2. Selection and transportation of dry ore powder materials in concentrator; 3. Cement industry - dry powder conveying and discharging; 4. Flour mill - flour conveying pipeline. 5. Other powder or small solid particles and other high-wear media transportation, because these mining media often have hard particles and fibrous dirt and other objects, the valve in the pipeline system as a opening and closing device, can play an excellent role.

Product characteristics

1. The valve has advanced design concept, which has incomparable characteristics of ordinary valves. As a fluid control system, it effectively solves the long-unsolved phenomenon of gate valve sealing surface damage and leakage caused by debris.
2. The valve adopts a spring self-sealing structure and a special sealing surface, so that the sealing pair is always consistent at any position, and the residual dirt (such as sediment, welding slag and other attachments) bonded on the sealing surface can be thoroughly scraped off. The sealing surface is not damaged. It has been proved by many manufacturers that the structure can not only scrape all kinds of dirt on the sealing surface, but also cut off the stainless steel welding rod of Phi 5mm, and the sealing surface is not damaged at all, and it works normally.
3. Because the self-sealing structure of the spring in the valve can automatically compensate for the normal wear of the sealing surface, on the one hand, the leakage rate is zero due to the strong sealing, on the other hand, the working life of the valve is greatly improved, and the cost is saved for the enterprise.
4. The valve adopts a wedge roller type switch mechanism, which can switch the valve easily and make up the warning device of a small amount of leakage on the sealing surface. If there is a small leak in the valve, as long as the hand wheel is closed, the valve can keep zero leakage, and ordinary valves do not have this skill.
5. Due to the use of special switching mechanism, to prevent the ordinary gate due to large temperature changes, so that the gate plate stuck, and can not open the phenomenon.
6. The valve is equipped with an automatic blowdown system at the bottom, which always keeps the body cavity clean and no residue.
7. The valve body is provided with a dust-proof mechanism to ensure that there will be no dirt immersion in the valve cavity, and the internal mechanism will fail