Imported cryogenic ball valve
Overview of imported cryogenic ball valve products
American YLOK imported cryogenic ball valve is mainly used in ethylene, liquefied natural gas and other chemical plants, and the output of liquid cryogenic medium such as ethylene, liquid oxygen, liquid hydrogen, etc. This kind of medium is not only flammable and explosive, but also gasifies when the temperature rises, and the gasification expands hundreds of times in volume. Moreover, these media have strong penetrating power, are easy to leak, and are difficult to process and manufacture.
Main technical parameters of imported cryogenic ball valve
Type: flange type/welded type
Size: DN15-DN200 1/2”-8”
Pressure: PN16-PN160 150LB-1500LB
Temperature: -196℃-350℃
Valve body: WCB carbon steel / stainless steel 304 / stainless steel 316
Valve seat: stainless steel + PTFE
Scope of application: water, gas, oil, liquid, ammonia and other media
Connection method: American standard or other standards
Features of imported cryogenic ball valve
1. The material of the pressure-bearing part can withstand the expansion and contraction caused by the change of the medium temperature, and the structure of the sealing part will not be permanently deformed when the temperature changes. When used in working conditions below -100℃, the valve parts should be cryogenically processed before finishing, that is, the parts should be immersed in a liquid nitrogen tank for cooling. When the temperature of the parts reaches -192℃, the temperature should be kept for 1-2h, and then taken out The outside of the box is naturally processed to room temperature, and the reheating cycle is 2 times.
2. When the operating temperature is lower than -100°C, the stem material is chrome-plated or nitrided to increase the surface hardness of the stem and improve the reliability of the packing seal.
3. The valve cover adopts a long-strength structure, its purpose is to protect the function of the stuffing box, keep the stuffing box at a position far from the low temperature, to ensure the sealing effect of the packing, and it can also wrap the cold insulation material to prevent the loss of cold energy. The length of the long neck can be selected according to the temperature of use and the thickness of the cold insulation material. When the sealing effect of the packing is reduced, grease can be added from the middle of the stuffing box to form an oil seal layer, which reduces the pressure difference of the stuffing box and improves the sealing performance.
4. The cryogenic ball valve has a structure to prevent abnormal pressure increase. After the cryogenic valve medium is vaporized, its volume will expand rapidly and the pressure will rise abnormally. When the pressure in the valve cavity rises, the valve cavity and inlet are connected, or at the valve inlet A pressure relief valve is installed at the end to ensure the safe use of the valve.
5. Gaskets for cryogenic ball valves have reliable sealing and restorability at room temperature, low temperature conditions and temperature changes
Working principle of imported cryogenic ball valve
Working principle of cryogenic ball valve:
The cryogenic ball valve is suitable for various pipelines, used to cut off or connect the medium in the pipeline. Different materials are selected, which can be applied to different temperatures and media respectively. The minimum working temperature is -196℃. The driving mode of the cryogenic ball valve is manual, worm gear drive, pneumatic or electric. Cryogenic ball valves generally adopt flange connection, but also can adopt welding connection.
Product features of cryogenic ball valve:
1. The structure of opening a pressure relief hole on the valve core is adopted.
2. The gasket is made of ceramic filling materials with stable sealing properties.
3. The valve body is light and small in size. In order to reduce the heat loss of the valve body, especially to ensure the use of the valve at ultra-low temperature, the valve body is specially designed to be light in weight and small in size.
4. The long axis valve has a valve through which low-temperature fluid flows. It adopts a long stem form, which can avoid the effect of external heat and keep the gland at room temperature to prevent the performance of the cover seal from being reduced. This length is the best length obtained through calculations and experiments.

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Products are designed, manufactured, and inspected strictly in accordance with China\'s GB, HG standards, and US API standards. The hardness of the sealing surface meets the national requirements and the width exceeds the national standard.
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Order process
Landline: 021-59718851 (AM-8: 30 to PM-17: 30)
Mobile phone: 18918462396 (WeChat same number 24-hour service)

QQ: 2030185432

Email: kunage@126.com
Receive customer purchase list, provide customers with valve model selection and quotation (price list).
Specific agreement: delivery time, special requirements, etc.
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Customers have special requirements for products, and must provide the following instructions in the order contract:
(1) Structure length;
(2) Connection form;
(3) Nominal diameter, full diameter, reduced diameter, pipe size;
(4) Operating medium, temperature and pressure range;
(5) Experiment, inspection standards and other requirements;
(6) Various driving devices can be configured in this field according to the special requirements of customers;
If the determined valve type and model are provided by the customer, the customer should correctly explain the meaning and requirements of its model, and sign the contract under the conditions that the supply and demand sides understand and agree.

Contact: Peng gong
Q Q: 2030185432
Mobile: 18918462396(WeChat same number - 24 hours service)
Landline: 021-59718851
E-mail :kunage@126.com