Cryogenic valves, as their name suggests, are employed at extremely cold temperatures. As a result, firms that use compressed natural gas (CNG) or liquefied natural gas (LNG) benefit greatly from these (LNG). Liquid gases like liquid nitrogen and liquid helium are used in many cryogenic valve applications. The most often used cryogenic element is liquid nitrogen, which can be acquired all around the world. Cryogenic valves are often used as primary valves in the oil and gas industry when cryogenic temperatures are very low. They may work at a higher pressure than typical and are designed for lower temperatures. Cryogenic valves can even be used to safely hold gases and also work well during travel. Cryogenic valves are available in a variety of shapes and sizes, allowing them to operate in a wide range of pressures, that is ensured that there will be no chances of natural gas leakage as it is very dangerous to have a leak.
Written down below are the types of cryogenic valves, as well as their usage.
Cryogenic Gate Valves
A wedge-shaped gate swings to close in line with the mating body seat in these valves. Even when fully open, they result in a minor pressure decrease. They have similar flow properties as ball valves but are limited by wear and tear.
Cryogenic Butterfly Valves
The butterfly valves have a circular disk in the center, which accounts for the shorter length of the butterfly valves compared to the other cryogenic valve types. When rapid opening and closing motions are necessary, they are commonly used. Furthermore, these are lighter and less expensive, as well as easier to use.
Cryogenic Ball Valves
This valve has a ball and a Polytetrafluoroethylene body, as implied by the name. The flow properties of these valves are superior to those of globe valves. When a tight shut-off is required in various applications, they work admirably. Ball valves, on the other hand, are more likely to get worn out around the seals and the ball itself. They’re typically used in applications that demand a completely unfettered flow channel.
Cryogenic Globe Valves
They get their name from their spherical shape, and they have an internal moveable disk that spins at a 90-degree angle to the plane of the body seat. These are extremely complicated, yet they provide excellent long-term sealing performance. They may not be able to withstand moisture for long periods of time and are not suggested for usage where the flow rate is critical.
That is why it is very important for you to consider using cryogenic valves as they serve the main purpose of keeping you safe from natural gases, as well as storing them. Cryogenic gases are extremely sensitive, and an unnoticed leak can cause substantial damage and pose significant risks. Because standard valves contract and expand at varying rates, they may develop seal fractures when exposed to extremely cold or extremely hot environments, resulting in leaks. To keep gases contained securely, cryogenic valves are normally kept closed. It’s designed to open under high pressure and allow unrestricted gas passage until the pressure drops, at which time it seals with a metal seat to prevent further leakage.