As an experienced manufacturer since 1986 in the control and instrumentation industries, We Darhor Technology Co., Ltd provides you mainly flow meters, solenoid valves as below: 1, flow meters----- air flowmeter, gas flowmeter, metal tube flowmeter, turbine flowmeter, electromagnetic flowmeter. We offer calibration services for clients. 2, Solenoid valves----- solenoid valves for water, air, gas, oil, fountain, chemical, and also for higher pressure etc. 3. Since 1996, Darhor investigated a ...