Shanghai Xinzhuang Instrument Co., Ltd. is a leading manufacturer of high-quality laboratory equipment, with the Xinzhuang (LNB) brand at its core. Known for its energy-efficient and environmentally friendly solutions, the company has established itself as a domestic leader in precision instrumentation. With a strong focus on professional manufacturing, Xinzhuang ensures that its products are not only secure and reliable but also cost-effective. By leveraging modern technology, the company continuously enhances product performance and introduces innovative designs to meet global standards.
Xinzhuang's products are widely distributed across the country and have earned the trust of users through consistent quality and exceptional customer service. The company’s team follows the core values of "unity, truth-seeking, and innovation" and upholds the principle of "customer first, quality first, reputation first." We warmly welcome both new and existing customers to visit us, collaborate, and grow together toward greater success.
Specifically, the Xinzhuang (LNB) brand offers a range of rotary evaporators that are designed with energy efficiency and environmental protection in mind. The materials used are carefully selected, and the craftsmanship is meticulous, ensuring durability and excellent performance at a competitive price. Since its establishment, the company has consistently focused on research and development, regularly upgrading and updating its products to introduce smart instruments with superior operability and stability—principles that Xinzhuang has always adhered to.
To better serve its clients, the company employs professional application engineers who are available to provide technical support and answer any questions promptly.
When it comes to maintenance, one common issue with rotary evaporators is leakage. To detect leaks, you can use phenolphthalein test paper, as ammonia is alkaline and will cause the paper to turn red. A leak point will appear where there is no frost. Alternatively, soapy water can be applied to the suspected area to identify the leak. For fluorescent or halogen-based systems, halogen lamps or leak detectors can be used, or soapy water can also help locate the issue.
During inspection, look for oil traces on the evaporation tube, as Freon and oil are miscible. When Freon leaks, oil may also escape. Using a halogen lamp, if there is a Freon leak, the flame will change color—ranging from blue to green, grass green, or even purple. However, if the flame turns dark green or purple, it may indicate the presence of phosgene, which is toxic. In such cases, it is advisable to avoid using this method for extended periods.
For safe operation and maintenance, follow these guidelines:
1. Before each use, carefully inspect the instrument. Check for any damage to the glass container and ensure all interfaces are properly matched. Handle the equipment gently.
2. Wipe each interface with a soft cloth and apply a small amount of vacuum grease. Always cover the grease after use to prevent contamination.
3. Avoid over-tightening any connections. Loosen them slightly to prevent long-term locking that could damage the connectors.
4. Turn on the power switch first, then gradually increase the speed. When stopping, turn off the machine before switching it off.
5. Do not tighten PTFE switches excessively, as this can potentially damage the glass components.
6. After each use, wipe down the machine’s surface with a soft cloth to remove any oils, stains, or solvent residues.
7. After use, loosen the PTFE switches to prevent deformation of the piston during prolonged operation.
8. Regularly clean the sealing ring by removing it, checking the shaft for dirt, and wiping it with a soft cloth. Apply a small amount of vacuum grease before reinstallation.
9. Ensure that the electrical components do not come into contact with water. Never expose the equipment to moisture.
10. Only use original, authentic accessories. Using non-original parts may cause serious damage to the equipment.
11. Always disconnect the power and water supply before performing any repairs or inspections. Remember, this is a delicate device, and damage caused by improper handling is not covered under warranty.
Shanghai Xinzhuang Instrument Co., Ltd. invites you to reach out with any inquiries. For more information, visit our website: http://
[Image: How to safely check the leak of the rotary evaporator]
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