Installation of pipeline all welded pneumatic ball valve Installation requirements of all welded pneumatic ball valve The specification should use the correct way to lift the valve, because the overall weight of the valve is large, usually several tons, in order to protect the valve stem, do not attach the lifting chain to the handwheel, gearbox or actuator. The protective caps at both ends of the valve sleeve shall not be removed before welding, which can play a good role in protecting the internal parts of the valve body. Butt welding shall be adopted for the connection between the directly buried all welded pneumatic ball valve and the main pipeline. The circumferential welds connected by butt welding must be subject to nondestructive testing and radiographic inspection, and the inspection results must comply with the Radiography of Fusion Welded Joints in Disc Bending (GB3323 2005) Class II slice standard, one-time welding may be unqualified. In order to ensure that the second welding will not affect the use of pneumatic ball valve, the manufacturer should request the manufacturer to add a section of long sleeve tube at both ends of the valve when ordering the valve, and the length of the long sleeve tube should be reasonably determined according to the size of the valve diameter, Once the weld is unqualified, there is enough length to cut off the unqualified weld and re weld it to the pneumatic ball valve and pipeline, the valve should be in the 100% full open position to prevent the ball from being damaged by spattered welding slag. At the same time, ensure that the temperature of the valve's internal seals does not exceed 140 ℃, which will cause stress, and some parts may be deformed due to high temperature, If necessary, appropriate cooling measures can be taken to reasonably control the temperature during welding.

Application of soft link industry and its serious role
Soft joint is a general term for pipe joints, which can be used for metal soft joint (pneumatic butterfly valve, white steel hose, metal compensator), rubber soft joint (rubber hose, rubber soft joint, shock absorber throat), Non metal soft connectors (rubber compensators, fabric skins, and the original materials manufactured according to the application conditions are also very different, metal, white steel, rubber, fabric layer.
First of all, there are indispensable connectors in the fan industry. The import and export of fans are the most widely used. We provide supporting applications to Shenyang Fan Factory, Blower Factory, Shenlian Fan and other large units all year round. The soft connection of fans belongs to the flexible connection accessories of fire smoke exhaust and air conditioning systems. Connecting fans and smoke exhaust ducts plays a role in reducing noise, displacement and vibration. When a fire breaks out, the soft connection of fire prevention and flame retardancy data will play an important role in smoke exhaust of the fan and retarding the spread of the fire. The soft connection of fans is widely used in the ventilation ducts and fire smoke exhaust systems of civil and industrial buildings.
Metal soft connection, not to mention, is widely used in steel, petroleum, chemical industry, metallurgy, power, water supply and drainage, construction and other industries.
Conditions for selecting products:
(1) High elastic limit, tensile strength and fatigue strength ensure normal operation of bellows.
(2) Good plasticity, convenient for processing and forming of bellows, and sufficient hardness and strength can be obtained through subsequent treatment processes (cold work hardening, heat treatment, etc.)
(3) Good corrosion resistance, meeting the working requirements of bellows in different environments.
(4) Good welding performance, meeting the welding process requirements of bellows in the manufacturing process.
Among them, pneumatic butterfly valves and similar products, as well as the super performance of shock absorption, noise reduction and high-temperature acid-base corrosion resistance, have not attracted enough attention and application from domestic commercial vehicle consumers and users in the past decades. The exhaust pipe of the starter and the muffler are directly connected with hard pipes, resulting in large vibration and noise of commercial vehicles Low service life and pollution, heavy and soft connection industry applications and play a serious role, super strong application performance has been widely used in the industry, quality is the first lifetime productivity!