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Ball valves are often called the simplest valves, but d […]
Ball valves are often called the simplest valves, but do you really know? It has the function of rotating 90 degrees. The plug body is a sphere with a circular hole or channel passing through its axis. In my country, ball valves are widely used in oil refining, long-distance pipelines, chemicals, papermaking, pharmaceuticals, water conservancy, electric power, municipal administration, steel and other industries, and occupy an important position in the national economy. This article mainly introduces some characteristics of plastic ball valves and key points of installation and construction. The plastic ball valve is mainly used to cut off or connect the medium in the pipeline, and the special form can be used for fluid adjustment and control.
Compared with other valves, the ball valve has the characteristics of simple structure, small size, light weight, less material consumption, small installation size, fast switching, 90° reciprocating rotation, small driving torque, etc., and has good fluid control characteristics and closing and sealing performance. In recent years, according to the anti-corrosion and acid-base requirements of different industries, a variety of plastic valves have been developed with excellent performance. Take the UPVC ball valve as an example. Compared with the metal ball valve, the valve body has light weight, strong corrosion resistance, compact and beautiful appearance, light weight, convenient installation, strong corrosion resistance, wide application range, hygienic material, non-toxic, wear-resistant, easy It is easy to disassemble and maintain.
In addition to UPVC plastic materials, plastic ball valves also have FRPP, PVDF, PPH, CPVC, etc. The main structural forms are sockets, screw flanges, etc. Our company has many types and specifications of valves to choose from.Key points of construction and installation: 1. The installation position, height and direction of the inlet and outlet must meet the design requirements, and the connection must be firm and tight. 2. The handles of various manual valves installed on the thermal insulation pipe must not be downward. three. According to the pipeline design requirements, install gaskets between the valve flange and the pipeline flange. four. Before the valve is installed, a visual inspection must be carried out to confirm whether the pressure test is carried out by the manufacturer.As an integral ball valve, the plastic ball valve has less leakage, high strength, and convenient installation and disassembly of the connecting ball valve.
Installation and use of the ball valve: When the flanges at both ends are connected to the pipeline, the bolts should be evenly tightened to prevent flange deformation and leakage. Turn the handle clockwise to close, otherwise open. Ordinary ball valves can only be used for cut-off and flow-through, not for flow adjustment. Liquids containing hard particles can easily scratch the surface of the ball. Here, we need to explain why ordinary ball valves are not suitable for flow regulation, because if the valve is half-open for a long time, the service life of the valve will be reduced. The reasons are as follows: 1. The valve seal will be damaged. The ball will be damaged; 3. Inaccurate flow adjustment. If the pipeline is a high temperature pipeline, it is easy to cause eccentricity.