Many media must be transported through pipelines at a certain temperature. If the heat loss of exposed pipelines is certain to be large during long-distance transportation, the media will be vaporized. If some media solidify and fail, insulation valves must be used. For example, in the pipeline for adding catalyst to petroleum cracking, hard sealed insulation pneumatic ball valves are used to ensure that the catalyst does not solidify.

Pressure of elastic casing compensator
Understand the aspects of compensator compensation
In the pipeline industry, the pressure requirements for products are very strict, usually at positive pressure: the gas state with high gas pressure. For example, when inflating a bicycle or car tire, the positive pressure is generated at the outlet end of the pump or pump.
This concept is often touched on in the industry, especially in the selection of micro pumps (such as micro booster pump, micro air pump, micro air pumping pump, micro air circulating pump, micro air pumping pump, micro air charging pump, etc.). What about negative pressure? It means that the absolute pressure (pressure) of the air flow is less than the atmospheric pressure (pressure) at the same elevation outside the shaft or the air duct, and its relative pressure (pressure) is negative, which is called negative pressure.
Elastic sleeve compensator
The application of negative pressure is very common. People often make a local space appear negative pressure, and then they can use the ubiquitous atmospheric pressure to work for us. For example, when people breathe, when the lungs are in a state of expansion, negative pressure appears, which forms a pressure difference between the inside and outside of the lungs. New air is pressed into the lungs. This concept is often touched upon in industry, especially in the selection of elastic casing compensator micro pumps (such as micro vacuum pumps, micro gas pumps, micro gas sampling pumps, micro gas circulation pumps, micro air extraction pumps). For example, there is a micro vacuum pump, which can form a negative pressure of 0.04 MPA at the suction end, meaning that 40% of the gas in the closed container can be pumped away, and the remaining 60%. The pressure difference with the external atmospheric pressure is 100 * (1-0.6)=40 KPA (that is, its negative pressure value is - 40 Kpa), which is -0.04 Mpa on the commonly used vacuum gauge. (Assuming that the local atmospheric pressure is 0.1Mpa, customers usually request negative pressure for rubber products. In short, "negative pressure" is a gas pressure state lower than normal pressure (that is, an atmospheric pressure). That is what we often call "vacuum".
(1) Pressure below existing atmospheric pressure (taken as reference zero)
(2) Dilution below atmospheric pressure. In order to strictly control the quality of elastic casing compensator products and meet the customer's request for working pressure, the quality supervision department of our company has professional equipment to stop testing and spot checking each product to ensure the excellent quality of each product.
The purpose of compensation is to compensate for defects and losses, and the compensator is to compensate for defects in some aspects of the pipeline and better maintain the operation of the pipeline. So what does it ultimately compensate for?
1. We all know that whether the pipeline is buried in the foundation or exposed to the air, it will be affected by temperature changes. With it, it can compensate for the axial and angular thermal expansion and contraction of the absorption pipeline.
2. The corrugated compensator has the function of expansion and contraction, and can be easily used for the installation and disassembly of valve pipes.
3. The pipeline will vibrate if the carrying connection is too large or the speed is too fast. The compensator can reduce the impact of equipment vibration on the pipeline.
4. When an earthquake occurs, the foundation subsidence will lead to pipeline deformation, which can absorb the deformation of the pipeline caused by the earthquake and subsidence.