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Model Number Designation： 
JIS Hydraulic Graphic Symbol
To make pressure adjustment, loosen the lock nut and turn the pressure adjustment screw clockwis or anti-clockwise. For an increase of pressure, turn the screw clockwise. Be sure to re-tighten the lock nut firmly after making adjustment to the pressure.
Notes: Please call our company telephone 021-67687301, 67687302 to buy "Throttle and Check Modular Valves" products. Browse this webpage carefully to know more about Throttle and Check Modular Valves.