A cryogenic gate valve is a specialized shut-off valve designed for ultra-low temperature media (typically below -46°C, such as LNG, liquid nitrogen, liquid oxygen, etc.). Its core objective is to ensure reliable sealing, flexible operation, and structural safety under deep-cryogenic conditions, preventing material embrittlement, leakage, and abnormal deformation. Based on standard gate valve design, cryogenic gate valves undergo comprehensive low-temperature adaptation: • Extended bonnet to isolate low temperatures and protect packing • Body materials selected from austenitic stainless steel or other materials with excellent cryogenic toughness • Sealing surfaces often hard-faced with wear-resistant alloys or designed with special polymers • Subjected to rigorous cryogenic treatment and testing The cryogenic gate valves produced by Kaiweixi Valve Group are characterized by their long-neck structure, leak-proof design, and materials resistant to low-temperature impact. They are widely used in critical cryogenic systems such as liquefied natural gas storage and transportation, air separation units, low-temperature chemical processing, and aerospace fuel systems.

The cryogenic ball valve is a specialized valve designed for ultra-low temperature operating conditions (typically below -46°C, such as in applications involving LNG, liquid oxygen, or liquid nitrogen). Its core objective is to ensure reliable sealing, smooth opening and closing, and structural integrity in deep cryogenic environments, preventing material failure, jamming, and leakage caused by extreme cold. To achieve this, cryogenic ball valves incorporate specialized structural designs and material technologies: Extended valve stem and elevated bonnet design to isolate the packing chamber and operating mechanism from the cryogenic medium, preventing frost formation and ensuring operational safety. Main components such as the valve body and ball are made of materials with excellent cryogenic toughness, such as austenitic stainless steel, and undergo deep cryogenic treatment to stabilize dimensions. Sealing systems typically use specialized flexible materials (e.g., reinforced PTFE) or metal seals, with pressure relief channels designed at the closed position to prevent abnormal pressure buildup in the valve cavity. The cryogenic ball valves produced by Kaiweixi Valve Group offer advantages such as rapid opening and closing, low flow resistance, excellent sealing performance, fire-safe design, and easy operation and maintenance. They are the preferred choice for critical applications, including liquefied natural gas receiving terminals and storage/transportation systems, air separation units, cryogenic chemical processing, and aerospace fuel refueling systems.

The cryogenic butterfly valve is a specialized control valve designed for ultra-low temperature operating conditions (typically operating at temperatures ≤ -46°C, suitable for media such as LNG, liquid oxygen, liquid nitrogen, and liquid argon). Its core technology lies in achieving zero-leakage sealing, low-torque operation, and long-term structural integrity in extreme cold environments through deep-cryogenic structural design, material selection, and specialized sealing solutions, effectively avoiding risks such as material embrittlement, low-temperature deformation, or seal failure. Key design features of cryogenic butterfly valves include: Extended neck bonnet design to isolate the packing chamber, bearings, and actuator from the cryogenic flow path, effectively blocking cold transfer and preventing external frost formation and operational freezing. Pressure-retaining components made of austenitic stainless steel (e.g., 304, 316L) or cryogenic nickel steel, subjected to deep-cryogenic treatment to stabilize the microstructure. Sealing systems typically employ multi-layer stainless steel with flexible graphite composite metal hard seals or specially modified PTFE soft seals to accommodate thermal contraction and maintain elasticity at low temperatures. The cryogenic butterfly valves produced by Kaiweixi Valve Group often adopt double-eccentric or triple-eccentric designs, allowing the sealing surfaces to disengage during operation, significantly reducing wear and operational torque. These valves are widely used in applications such as:LNG receiving terminals and storage facilities、Air separation units、Cryogenic storage and transportation systems、Aerospace fuel supply systems、Specialized chemical processing industries

The cryogenic globe valve is a critical shut-off valve designed for ultra-low temperature media systems (typically operating below -46°C, such as LNG, liquid oxygen, liquid nitrogen, etc.). Its core design objectives are to ensure reliable sealing, low operating torque, and structural safety in deep-cryogenic environments, while preventing issues like low-temperature embrittlement, leakage, and operational jamming. Key design features of cryogenic globe valves include:Extended bonnet design to effectively isolate cryogenic media from the packing chamber and operating mechanism, preventing external frost formation and ensuring operational safety.Pressure-retaining components such as the valve body and bonnet, made from cryogenic-tough materials like austenitic stainless steel, and subjected to deep-cryogenic treatment to stabilize dimensions and performance.Disc and seat sealing surfaces typically hardened with wear-resistant alloy overlays or specialized polymer materials to ensure long-term sealing integrity at low temperatures. The cryogenic globe valves produced by Kaiweixi Valve Group are characterized by:Flow direction-specific design (flow enters from below and exits from above),Tight and durable sealing,Stable and reliable operation. These valves are widely used in applications requiring precise shut-off and regulation in systems such as:LNG receiving terminals,Air separation units,Cryogenic storage tanks,Specialized chemical processing systems.

A Cryogenic Check Valve is an automatic backflow prevention valve specifically designed for ultra-low temperature operating conditions (typically ≤ -46°C, such as LNG, liquid oxygen, liquid nitrogen, etc.). Its core function is to prevent media backflow in cryogenic medium transportation systems, ensuring unidirectional flow and equipment safety. Through material selection and structural optimization, the valve maintains reliable opening and closing performance as well as structural integrity at extremely low temperatures. Key components such as the valve body and disc are made of austenitic stainless steel or cryogenic alloys and undergo deep cryogenic treatment to ensure low-temperature toughness. The sealing surfaces are typically hard-faced with stainless steel and wear-resistant alloys or use polymer soft seals to guarantee sealing performance in cryogenic environments. Structural Features of Cryogenic Check Valves:Lift-type or Swing-type Design: Adapts to different flow rates and installation orientations.Lightweight Disc and Low-resistance Spring: Ensures sensitive and reliable opening and closing at low temperatures.Anti-cold Bridge Structure: Minimizes heat transfer and prevents external frost formation.Cavity Pressure Relief Design: Avoids abnormal pressure buildup caused by vaporization of residual liquid. The cryogenic check valves produced by Kaiweixi Valve Group are widely used in LNG storage and transportation systems, air separation units, cryogenic pump outlets, and aerospace fuel systems.

Liquid Cooling Valve Models: YLQ / YLP / YLD / YLH / YLA / YLPQ / YLC Liquid cooling valves are control components specifically designed for liquid cooling systems. They are primarily used to regulate the flow rate, direction, and pressure of coolants (such as water-based coolants: deionized water, ethylene glycol/propylene glycol solutions; oil-based coolants: synthetic oils (PAO/synthetic hydrocarbons), mineral oils, silicone oils; fluorinated fluids: perfluoropolyethers (PFPE), hydrofluoroethers (HFE), perfluorinated amines (PFA)). They are key components of liquid cooling thermal management systems. Their performance directly affects the cooling efficiency, operational reliability, and safety of the system. Liquid cooling valves mainly perform three core functions: First, precise flow control via electric control valves or balancing valves to avoid localized hot spots. Second, rapid on/off switching and flow direction control using ball valves, solenoid valves, etc. Third, overpressure and backflow prevention via safety valves and check valves to protect equipment safety. The types produced by Kaivex Valve Group include ball valves (for quick isolation), electric control valves (for precise flow control), solenoid valves (for fast switching), check valves (to prevent backflow), and balancing valves (for hydraulic balance). All feature quick-connect capability (supporting hot-swappable maintenance). Liquid cooling valves have a zero-tolerance requirement for external leakage, with internal leakage meeting ANSI Class VI standards. The operating temperature range is typically -40°C to 120°C, with a pressure rating of up to 1.6 MPa.