This valve meters the flap speed in the hydraulically controlled system of the Lancair IV and IV-P.

This valve features a variable flow restrictor with positive shut-off and free reverse flow. A wide range of flow adjustment in the controlled flow direction is possible because of the fine thread and tapered needle. A spring biased ball check allows full flow in the opposite direction. Unwanted changes in adjustment are prevented by a lock nut.

This product is designed to fit the Lancair IV, and IV-P models.