A ventilation butterfly valve is commonly used in gas pipelines within industrial environments such as chemical plants, construction materials, power stations, and glass manufacturing. It is designed for controlling the flow or shutting off the flow of gases like dusty cold air or hot air in ventilation and environmental protection systems. Ventilation butterfly valves are typically installed horizontally in the pipeline to ensure proper operation and longevity. When installing a ventilation butterfly valve, there are several important considerations to keep in mind: 1. The installation location, height, and direction of the valve must comply with the design specifications. It's crucial that the flow direction of the medium matches the arrow marked on the valve body. Additionally, all connections should be secure and tightly sealed to prevent leaks. 2. Before installation, a visual inspection of the valve is necessary. The nameplate should conform to the national standard "General Valve Mark" GB 12220. For valves with a working pressure exceeding 1.0 MPa, especially those used on main pipelines where shut-off function is critical, strength and tightness tests must be conducted. These tests should be completed before installation and only after passing them should the valve be put into use. During the strength test, the pressure should be set at 1.5 times the nominal pressure, and the test should last for no less than 5 minutes. There should be no leakage from the valve casing or packing during this time. For the tightness test, the pressure should be 1.1 times the nominal pressure, and the duration must follow the guidelines outlined in GB 50243. Yongjia Tezhong Valve is a trusted manufacturer specializing in the production of various types of butterfly valves, including three-eccentric butterfly valves, metal-seated hard seal butterfly valves, ventilation butterfly valves, and flange-type butterfly valves. With years of experience and a commitment to quality, the company has become a preferred partner for both new and existing customers. We warmly welcome all clients to discuss business opportunities with us. For more detailed information about our products, please visit our official website. This article is reproduced from: http://
Hexagon slotted nut, that is, the groove is machined above the hexagon nut. It is used in conjunction with threaded Bolt with hole and cotter pin to prevent the relative rotation of bolt and nut. Hexagon slotted nut is generally used in vibration and impact situations. After the nut is fastened, it needs to be equipped with cotter pin hole and installed with cotter pin. Such as lifting equipment, artillery, press, die-casting machine, etc.
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