Ball check valve, also known as check valve, its role is to prevent the medium in the pipeline back. The opening and closing of the medium by the medium flow and power to open or close itself to prevent the media back to the valve called the check valve. Check valve is an automatic valve, mainly for the media on the one-way flow of the pipeline, only to allow the media to flow in one direction to prevent accidents.
Principle and Structure of Ball Check Valve
1, the structure length is short, its structure length is only the traditional flange check valve 1/4 ~ 1/8
2, small size, light weight, the weight of only the traditional micro-resistance slow closing check valve 1/4 to 1/20
3, the valve closed quickly, small water hammer pressure
4, horizontal or vertical pipe can be used, easy to install
5, smooth flow, fluid resistance is small
6, action sensitive, good sealing performance
7, valve flap travel short, closing valve impact is small
8, the overall structure, simple and compact, handsome in appearance
9, long life, high reliability
Ball check valve is a multi-ball, multi-channel, multi-tapered inverted fluid structure of the check valve, mainly by the front and rear body, rubber ball, cone and other components, the plane structure
The working principle is: rubber ball in the dome for a short stroke to achieve the valve opening and closing. When the pump starts, the water under the action of pressure to open the rubber ball, so that the ball rolling to the right, by the rear body of the cone in the fixed position, check valve open; pump stop, due to the pipeline system Backwater pressure, forcing the rubber ball to roll to the left front valve body, to check the closure of the valve.
Rubber ball with hollow ball, outside
The rubber with excellent elasticity ensures both the seal and the damage to the piping system during the closing process. The perforated tapered body acts as a fixed action on the ball and opens the pressure of the contact area between the rubber ball and the tapered body when the valve is opened to contact it for surface contact and to reduce the hydraulic loss caused by the glittering of the rubber ball in the valve body.
The check valve is a three-channel spherical check valve. According to its structural characteristics, the UG software is used to optimize its structure by parametric design, and the flow channel is modeled three times to lay the foundation for flow field analysis.
Spherical check valve because the seal is covered with rubber ball, so good sealing performance, reliable operation, good resistance to water hammer; and because the seal can be a single ball, but also can be made of multi-ball, it can be made of large diameter The But its seal is covered with rubber hollow sphere, does not apply to high-pressure pipe, only for low pressure on the pipeline.
Since the shell material of the ball check valve can be made of stainless steel, the hollow sphere of the seal can be coated with polytetrafluoroethylene engineering plastics, so it can also be applied to the general corrosive medium.
The operating temperature of the check valve in the -101 ~ 150 ℃, the nominal pressure ≤ 4.0MPa, the nominal diameter range between 200 ~ 1200mm.