Established in 1993, Guanfa Valve Manufacture Co., Ltd. is specialized China isolation valve manufacturer and distributor of valves, hoses, tubes and pipes. Our oem isolation valves are suitable for acid, alkali, water, steam, seawater, coal gas and natural gas. They are widely used in petroleum, chemical, paper making, fertilizer, brewing and metallurgy. The use of specialized software of Pro/E and CAD has shorted the P&D and trial manufacture cycle, and greatly improved the service life and dependability of products. Our high-quality products have been exported to the North Amercia, UK, USA, Germany, Italy, India, France, Australia, Japan.

The Chem-STM utilizes revolutionary diaphragm technology in a liquid compatible, sub-miniature inert isolation valve. With a compact size, flexible diaphragm design, low power consumption, and low cost the Chem-S provides a unique and valuable option for the medical and scientific instrumentation industries. An pneumatically controlled isolation valve permits the probe to be introduced into the mass spectrometer vacuum system while maintaining a good vacuum in the MS. When the probe is inserted into the first probe seal of the isolation valve, a vacuum valve opens to allow the accessory vacuum pump to evacuate the probe inlet. A vacuum gauge measures this vacuum and when it evacuates down to 200 millitorr, the probe is advanced to the second seal in the probe inlet. A rotary turn pneumatically operated ball valve opens to permit the probe to be inserted through the isolation valve and into the mass spectrometer.

The GS Series is a 2-way sub-miniature inert isolation valve designed to control the flow of high purity or caustic fluids. The GS Series is available in a stainless steel or acetal body to meet your corrosion resistant, heat, weight, and media requirements.The isolation valve, designed to control the flow of various aggressive liquids and gases with several body and diaphragm materials. virtually impervious to chemical attack and to protect high purity media. The Panel on the front display has a series of three LED lights which display the status of the AutoProbe - Power On, Running and a Fault indicator. Also on this display is an emergency Pause button which will stop the operation of the AutoProbe from injecting the probe or running the sample, until the switch is pressed a second time to continue the operation of the system. This switch only pauses the AutoProbe - it does not stop or pause the CTC PAL Autosampler.

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