Hydraulic vangs change the height of the boom to help control sail shape. They also function as a topping lift to hold the boom up when reefing, and to keep it level when the sail is flaked. Harken offers a full range of vang cylinders. The HYCV single-acting gas return is the standard vang used for most boats up to approximately 23 m (75'). For larger yachts with heavier booms Harken offers more powerful push/pull double-acting vangs. The standard double-acting vang is the HYCZ push/pull vang.
All vangs are made to order. Specify desired PCLC (pin center length closed) in millimeters rounded to the nearest 10th. Standard vangs are black hardcoat-anodized aluminum with rod clevis and cylinder end clevis.