CH, CHY-type gear pump with overload protection as a safety valve, pressure relief valve all return 1.5 times the rated discharge pressure may be required by the user within the actual process to make the appropriate adjustments. However, the safety valve pressure relief valve can not do long-term work, when necessary, be installed in the pipeline. 
 CH, CHY-type gear pump is used to transport the viscosity at 200 ° E (1500mpa.s) the following non-mechanical solid particle impurities oil, turbine oil lubrication properties of a similar nature and other media, the temperature not higher than 120 °. 
 CH, CHY-type gear pumps are positive displacement pumps. Its unique structure means a self-absorption capacity, oil delivery, when the pulse steady, high pressure, abrasion, long life, wide range of applications, and high efficiency. 
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