It provides static and dynamic control of load by regulating the flow IN and OUT of the actuator, through ports C1 and C2.This valve module includes 2 sections, each one composed by a check and a relief valve pilot assisted by pressure in the opposite line: the check section allows free flow into the actuator, then holds the load against reverse movement; with pilot pressure applied at the line across, the pressure setting of the relief is reduced in proportion to the stated ratio until opening and allowing controlled reverse flow. Back-pressure at V1 or V2 is additive to the pressure setting in all functions.
Technical data
| Model | HOW-3/8-50 | HOW-1/2-80 | HOW-3/4-120 | HOW-1-160 |
| Flow Range (l/min) | 50 | 80 | 120 | 160 |
| Max.Peak Pressure (MPa) | 31.5 | |||
| Pilot Ratio | 4.3:1 | 4.3:1 | 6.8:1 | 3：1 |
| Valve body（Material）Surface treatment | （Steel body）Surface clear zinc plating | |||
| Oil cleanliness | NAS1638 class 9 and ISO4406 class 20/18/15 | |||
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