There are different kinds of valves which are used for different purposes. These valves are used in different kinds of liquids and fluids. For instance, a cryogenic solenoid valves are specifically used for cryogenic liquids. What are cryogenic liquids? These liquids are actually “liquefied gases that are stored in their liquid state at a very low temperature”. Cryogenic liquids do have boiling points which are below -150 degrees centigrade or -238 degrees Fahrenheit. The cryogens are extremely cold and just a small amount of liquid can expand the gas into large volume. Cryogenic liquids are hazardous hence; it must be handled cautiously for safety.
The Cryogenic Solenoid Valves are high performance direct acting or pilot- operated valves. It is made of brass and PTFE seals which is appropriate for continuous service. It can be configured with Liquid LCO2 (Carbon Dioxide), LN2 (liquid nitrogen) and other Cryogenic fluids all the way down to -196 degrees Centigrade or other extreme; ambient temperature of +50 degrees Centigrade (maximum); It has a maximum viscosity of 21 square millimeter per second and a response time between 8 – 40 ms (closing).
The Cryogenic Solenoid Valves internal parts are made of stainless steel. Its Voltage is 230, 115, 48, 24V AC/24, 12 V DC. The duty cycle is continuous (ED100%) and the cycling rate is between 10 to 100 cpm. For electrical protection, the IP65 (with plug to ISO 4400) is required to be used. Sealing sets are also required for long term use in humid environment. The PTFE 316 stainless steel guideing tubes, coated plungers and plunger springs and encapsulated coils and also the PTFE or either Rulon seat seals can produce a truly tough cryogenic valve for applications which requires high cycle life and media temperature control.
Cryogenic Solenoid Valves are carefully designed and created for use in environmental chambers, food processing, laser surgical equipment and in semiconductor manufacturing. The Cryogenic solenoid Valves closed when de- energized (NC), it uses conical seal (which has an excellent shutoff and durability), Disc seal and Pilot operated piston for high flow rate.
Using a cryogenic solenoid valve can give us an assurance of total safety and protection.