Check Valve are mainly used in petroleum, chemical, metallurgical, pharmaceutical and other systems to transport highly viscous media that solidify at room temperature. The insulation jacket of the BJ45W DC jacket Check Valve is welded between the two flanges of the Universal Valve. There are two connection ports of the insulation jacket on the side and bottom of the Universal Valve. DC Check Valve are particularly suitable for pipelines in the chemical and fertilizer industries. The steam in the jacket prevents the media from crystallizing.
Product features of Check Valve: The opening and closing part of the Check Valve is a plug-type valve disc. The sealing surface represents a flat or conical surface, and the valve disc moves linearly along the center line of the fluid. The movement forms of the
Valve Stem include lifting rod type and lifting and rotating rod type. The corrugated pipe Check Valve is only suitable for fully opening and fully closing, and adjustment and throttling are prohibited.
The Check Valve has compact structure, beautiful appearance and excellent performance. The valve disc and valve stem adopt a movable connection structure, which allows flexible opening and closing. The valve stem is designed with a channel seal pair to improve the service life and sealing performance of the Universal Valve. The sealing surface is made of alloy steel or hard alloy, and the valve and seat seals are made of iron-based alloy surfacing or Stellite-based hard alloy surfacing, which has good wear resistance, high temperature resistance, corrosion resistance, good scratch resistance and long service life. long.
The surface of the valve stem has been nitrided and has good corrosion resistance and friction resistance. The packing is made of flexible graphite, which has reliable sealing, flexible operation and small opening and closing torque. The Check Valve has good thermal and cold insulation characteristics, and the diameter of the Universal Valve is consistent with the pipe diameter. At the same time, it can effectively reduce the heat energy loss of the medium during management. Jacket interfaces are provided on the side and bottom of the Universal Valve for injecting steam or other heat preservation and cold preservation media to ensure that the medium in the valve can operate normally. It is mainly used in system pipelines in chemical, petroleum, pharmaceutical, metallurgical and other industries to transport media that will solidify and easily crystallize at room temperature.
The Check Valve can be selected from various piping flange standards and flange sealing surface types. The transmission method can be manual, worm gear, or electric, pneumatic, hydraulic and other driving methods, which facilitates long-distance control and meets the different needs of users. .
1. Check Valve operated by handwheels and handles can be installed at any position in the pipeline.
2. The handwheel, handle and vibrating mechanism are not allowed to be used for lifting.
3. The flow direction of the medium should be consistent with the direction of the arrow shown on the valve body.
Check Valve, also called stop valve, is due to the small friction between the sealing surfaces during the opening and closing process, relatively durable, small opening height, easy manufacturing and convenient maintenance. It is not only suitable for medium and low pressure, but also for high pressure. Its closing principle is to rely on the valve rod pressure to make the valve disc sealing surface and the valve seat sealing surface closely fit to prevent the flow of media.
The Check Valve only allows the medium to flow in one direction and is directional when installed. Its structural length is larger than that of the
Gate Valve, and at the same time, the fluid resistance is large, and the sealing reliability is not strong during long-term operation.
Check Valve are divided into three categories: straight-through, right-angle and straight-flow inclined Check Valve.
When the Check Valve opens, when the opening height of the valve disc is 25% to 30% of the nominal diameter, the flow rate has reached the maximum, indicating that the Universal Valve has reached the fully open position. Therefore, the fully open position of the Check Valve should be determined by the stroke of the valve disc.
