General Administration of Quality Supervision, Inspection and Quarantine announced results of national supervision and inspection of mechanical seal products

The General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China announced results of the state supervision and inspection of 29 types of mechanical seal products in 7 provinces and municipalities directly under the Central Government, including Tianjin, Liaoning, and Zhejiang. The pass rate of product physical sampling was 99.5%. Among them, one kind of product was leak tested due to the breakage of the rubber bellows during the operation test, and the running test could not be continued. Individual products carbon graphite seal ring wear and air tightness test failed.

Hydraulic Valve Contain Main Control Valve, Pilot Valve on Pump, Relief Valve on Control Valve and Solenoid Valve.

Fuction:

(1) when the single boom is lifted, the two pumps supply oil together to improve the lifting speed of the boom. (only when the boom is raised)

(2) when the bucket rod moves separately, the two pumps supply oil to the platform and speed up the action speed of the bucket.

(3) the boom is preferred. When the boom and other actions are carried out at the same time, the action of the boom will be given priority.

(4) priority is given to rotation, and when rotary and bucket move simultaneously, gyration will be given priority.

(5) Negative flow control, to provide a negative flow signal to the main pump, so that the valve stem in the middle, the main pump displacement becomes minimum.

(6) Walking in a straight line, when the excavator is moving forward or backward, other actions can be taken at the same time to ensure the needs of special working conditions.

(7) electrical sensors can be configured to meet the needs of electronic control.

Hydraulic Valve

Hydraulic Valve,Hydraulic Control Valve,Hydraulic Solenoid Valve,Hydraulic Check Valve

Jining Tongderui Construction Machinery Co., Ltd. , https://www.tdr-excavatorparts.com