Since 1977, we have accumulated over 40 years of experience in research and development and manufacturing of metering pumps, reciprocating pumps, chemical dosing devices, and water vapor sampling devices;

Since the early 2000s, it has been reviewed annually through three system certifications: ISO9001, ISO14001, and OHSAS18001;

Participated in the drafting of multiple national and industry standards;

We have nearly 20 national invention patents with valid authorizations and a registered trademark of "Dachao".

We have a dedicated professional R&D and design team, focusing on the R&D and innovation of diaphragm metering pumps and diaphragm reciprocating pumps, with advanced and unique designs;

Achieved comprehensive improvement in the quality of chemical dosing devices and water vapor sampling devices;

Every year, multiple marketable new products are launched.

Provide over 60 series and nearly a thousand specifications of products, in addition to having nearly a thousand new and old outdoor brands in China

The products are also sold to over thirty countries and regions.