What is the impact of thermal insulation pneumatic ball valve on equipment operation? If the valve on the thermal pipeline is not well insulated, it may cause leakage due to uneven thermal expansion and contraction during multiple opening and closing. In winter in cold regions, once the uninsulated valve is closed, the freezing speed of the valve is much higher than that of the valve with good insulation. If the time interval between closing and opening is short, the valve with good insulation will always be closed and opened under hot conditions; However, valves with poor insulation or without insulation may be closed at high temperature and opened at low temperature. High temperature thermal alternation makes valve parts in contact with or close to the medium subject to alternating stress, which aggravates the fatigue aging of valve parts and shortens the service life of the valve. At the same time, the thermal alternation of the medium will also cause the valve seat and guide sleeve (interference fit or threaded connection) to become loose, thus losing the sealing effect.

The pneumatic butterfly valve is made of stainless steel, so it is not easy to age
As it is made of stainless steel, it is not easy to age, and there is no need to worry about being bitten by rats. In terms of safety, the pneumatic butterfly valve is obviously superior. From the cost of one purchase, the cost of purchasing pneumatic butterfly valve is much higher. Sometimes problems arise when the service life is not divided.
In the long run, it is more durable and cost-effective than the rubber hose. In terms of service life, the pneumatic butterfly valve can reach 6-8 years, while the rubber hose only needs 18 months.
At present, rubber hoses are widely used by most of the gas users, and this material is very casual aging. In case of greasy, hot expansion and cold contraction, the aging speed will be accelerated. If it is bitten by a mouse, it is likely to be damaged and cause gas leakage, so it is recommended to purchase a pneumatic butterfly valve.
In terms of price, the rubber hose is 10 yuan/meter (plus 20 yuan for door-to-door installation); The price of pneumatic butterfly valve is about 6-10 times that of rubber hose (free of door-to-door device fees). You can read more about the relevant knowledge of metal compensators. For the important condition that pneumatic butterfly valves are indispensable, the bellows is the body of the pipe, playing a flexible role; The net sleeve has the effect of strengthening and shielding; The joint plays the role of connection. Today, let's talk about its net cover.
The mesh sleeve is woven by several strands of metal wires or several split metal belts that cross each other in a certain order. It is sleeved on the outer surface of the metal bellows with regular viewpoints, playing a role of reinforcement and shielding. The net sleeve can not only guarantee the safe and reliable operation of the pneumatic butterfly valve under the condition of axial and radial static load of the branch pipe pneumatic butterfly valve, but also ensure that the hose ripple is not directly subject to mechanical damage such as relative collision and impact. The strength of corrugated pipes woven with mesh sleeves can be improved by dozens to dozens of times. The highest shielding ability can reach 99.95%.
The material of the mesh sleeve is usually the same as that of the metal bellows, and there are also two materials used together. Generally, pneumatic butterfly valves only use one layer of mesh sleeve; In particular, there are also two or three layers of weaving. According to the size of the corrugated pipe and its application requirements, it is usually made of wire with a diameter of 0.3~0.8mm or strip with a thickness of 0.2~0.5mm. There are 4-15 wires per share and one strip per ingot. At present, most of the wire mesh sleeves produced are 24 strand, 36 strand, 48 strand, 64 strand, corrugated pipe with extra large diameter, and 96 strand, 120 strand and 144 strand. In addition to the number of strands (wire), wire diameter, number of spindles (strip) and thickness, the main weaving parameters of the net cover also include cover area, weaving distance, weaving viewpoint, etc. They are the important basis for determining the function of pneumatic butterfly valves.