Zhengmao Valve Low-Temperature Check Valve: A "Guardian" for Low-Temperature Conditions, More Secure with Floating Ball Valves
First, let's share some solid parameters with you: the valve body is made of 304 or 316L stainless steel, which is resistant to low temperatures and corrosion, and can withstand extreme temperatures from -196℃ to 80℃, making it suitable for ultra-low-temperature media such as liquid nitrogen and liquid oxygen. The nominal diameter ranges from DN15 to DN200, and the nominal pressure covers 1.6MPa to 6.4MPa. The sealing surface adopts a polytetrafluoroethylene (PTFE) and metal composite structure, with a test pressure of up to 1.1 times the nominal pressure. No leakage will occur no matter how many times it is opened or closed under low temperatures. Unlike some valves that claim to withstand low temperatures on paper but have damaged seals after only two uses, our valve comes with complete low-temperature test reports and material certificates, ensuring reliability in project applications.
Then let's talk about the advantages in use: it adopts a swing-type structure, which has low resistance when the medium flows, so no extra force is needed to push the valve disc. In addition, there is a spring behind the valve disc to assist in resetting. Even if the medium flow rate slows down under low temperatures, the valve can close quickly and tightly to prevent backflow. A customer from an LNG station once said that the previous check valve always failed to close in time at low temperatures, but after replacing it with ours, there has been no medium backflow since. If manual on-off control is required in the station, it is perfect to match it with our floating ball valve: the low-temperature check valve prevents backflow, and the floating ball valve is responsible for on-off adjustment. It is easy to operate and safe, and many customers have adopted this combination.
Now this valve is widely used in scenarios such as LNG storage tank outlets, refrigeration pipelines of low-temperature freezers, and liquid gas transmission pipelines. For example, when a low-temperature freezer supplies cold to equipment, it can prevent the refrigerant from flowing back to the compressor; when unloading an LNG tank truck, it can stabilize the pipeline pressure and avoid medium backflow. The most reassuring part is the after-sales service: this low-temperature check valve comes with a one-year warranty. Whether you need on-site technical guidance during installation or encounter minor faults at low temperatures later, someone will respond within 24 hours of your call. Spare parts are also shipped quickly, so the operation of the station will not be delayed.
Want to know more? Follow Zhengmao Valve's official website or WeChat official account. The latest product news and cases of customers using it well will be updated. For instance, a customer from a low-temperature logistics park recently matched this low-temperature check valve with the floating ball valve on the refrigeration pipeline network, which even improved the energy-saving effect. These practical experiences will be shared with everyone. If you have technical questions or want a quotation, feel free to contact us. We will definitely not beat around the bush and explain things clearly to you.
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