Zhejiang University is a prestigious institution of higher education with a long history, located in Hangzhou, a famous historical and cultural city and scenic tourist destination in China. The predecessor of Zhejiang University, Qiushi Academy, was founded in 1897 as one of the early modern higher education institutions established by Chinese people themselves. In 1928, it was named National Zhejiang University. During the War of Resistance Against Japan, Zhejiang University relocated to the west and operated for seven years in Zunyi, Meitan, and other places in Guizhou. In the autumn of 1946, it returned to Hangzhou. In 1952, when the national colleges and universities were adjusted, some departments of Zhejiang University were transferred to sister colleges and universities and the Chinese Academy of Sciences. The main part of Zhejiang University that stayed in Hangzhou was divided into several single discipline colleges and universities, which later developed into the original Zhejiang University, Hangzhou University, Zhejiang Agricultural University and Zhejiang Medical University. In 1998, four universities with the same roots and origins merged to form the new Zhejiang University, embarking on a new journey to create the world's top university. Over the course of more than 110 years, Zhejiang University has always taken it as its responsibility to cultivate talents, promote technological progress, serve social development, and promote advanced culture, gradually forming a fine tradition with "seeking truth and innovation" as its motto.

Hangzhou Gaoyan Technology Co., Ltd. (YXGAS) is a joint-stock company that integrates the research and development, production, sales, supporting, service, and design, manufacturing, installation, and acceptance of gas pipeline manifold systems. The company has gathered a group of professional talents in the high-purity process transportation industry to provide customers with design, installation, and commissioning services for pressure reducers and their supporting products, as well as the preparation, storage, and transportation systems of high-purity gas media. Simultaneously providing indoor quality control equipment and systems necessary for demanding production environments. Hangzhou Gaoyan (pressure reducer) has always adhered to the concept of providing customers with reasonable pipeline transportation solutions, with the goal of becoming the supplier of high-purity gas transportation systems and providing customers with many classic solutions. Products and services are widely used in the following fields:
Semiconductor Microelectronics, Solar Lighting (Optoelectronics), New Energy, Petrochemical, Biopharmaceutical

YXGAS promises that all products sold are qualified after factory inspection. Any usage problems caused by product quality can be repaired or replaced free of charge, and the cost will be borne by our department.
The scope of maintenance includes: pressure reducers, valves, joints, etc.
The maintenance period is:
1. Stainless steel is used for highly corrosive gases with a warranty period of three months
2. Stainless steel for medium corrosive gases with a warranty period of six months
3. Stainless steel and nickel plated copper for non corrosive gas warranty period of one year
4. Brass material pressure reducer warranty period of three years
Note: Appropriate fees will be charged for repairs beyond the repair period.

As a technician in the ultra-high purity pipeline system installation industry, Hangzhou Gaoyan has many years of successful experience. From detailed engineering design to on-site initiation, we have sufficient experience and resources to complete each project and satisfy you, and we can provide short construction periods and competitive prices. By integrating professional technology, work, and a high-quality team, Hangzhou Gaoyan can provide you with solutions for ultra-high purity process systems from design, consulting, installation, testing, debugging, to assisting in certification. In addition, Hangzhou Gaoyan Technology Co., Ltd. has always been the provincial-level agent of Jierui pressure reducer products in Zhejiang, responsible for the work of Jierui in Hangzhou and Zhejiang. The product specifications are complete and the coverage is wide; At the same time, Gaoyan has independently developed more economical and practical pressure reducing products. At present, the product series provided includes stainless steel pressure reducers (including ammonia pressure reducers, chlorine pressure reducers, nitric oxide pressure reducers, sulfur dioxide pressure reducers, hydrogen chloride pressure reducers, hydrogen sulfide pressure reducers and other single-stage and two-stage pressure reducers, high-pressure pressure reducers), with models R11, R12, R14, R15, R21, R22, R23, R31, R44, R77, etc; Brass pressure reducers (352 series pressure reducers, 152 series pressure reducers, 151 series pressure reducers, 452 series pressure reducers, 550 series pressure reducers, high flow 155 series pressure reducers, 153 series pressure reducers, ultra high flow low pressure R66B series pressure reducers, 155M series pressure reducers for busbars, 153M series pressure reducers, 155L series pressure reducers for pipelines, 153M series pressure reducers, low flow 190 series pressure reducers, back input 210 series pressure reducers, as well as pipeline type 155L series pressure reducers, 152L series pressure reducers, 210SR series pressure reducers, high pressure 550 series pressure reducers, 591 series pressure reducers, high flow high pressure pressure pressure reducers 155HF series). From the medium, there are oxygen pressure reducers, nitrogen pressure reducers, helium pressure reducers, argon pressure reducers, hydrogen pressure reducers, methane pressure reducers, propane pressure reducers, acetylene pressure reducers, natural gas pressure reducers, and carbon dioxide pressure reducers. At the same time, we also act as an agent for some domestic brands of pressure reducers, instrumentation products, and analyzer products. We welcome all * friends to visit and guide us, and seek common development.

Gaoyan's integrity, strength, and product quality have been recognized by the industry. Welcome friends from all walks of life to visit, guide and negotiate business with Gaoyan Company.