HOV SERIES COUNTERBALANCE VALVES FOR OPEN CENTRE
When pressure at V2 rises above the spring bias pressure, the check seat is pushed away from the piston and flow is allowed from V2 to C2. When load pressure at C2 rises above the pressure setting, the direct operated, differential area, relief function is activated and flow is relieved from C2 to V2.With pilot pressure at V1-C1, the pressure setting is reduced in proportion to the stated ratio of the valve, until opening and allowing flow from C2 to V2. The spring chamber is drained to V2,and any back-pressure at V2 is additive to the pressure setting in all functions.
|Max Flow rate（L/min）||50||80||120|
|Max operating pressure（MPa）||31.5|
|Valve body（Material）Surface treatment||（Steel body）Surface clear zinc plating|
|Oil cleanliness||NAS1638 class 9 and ISO4406 class 20/18/15|