b'Boom VangsHydraulic vangs change the angle 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 HYCZ single-acting gas return is the standard vang used for most boats. Double-acting push/pull vangs can be custom ordered. Boom Vang Cylinder Part NumberMegayacht Double-Acting Boom Vangs For larger yachts with heavier booms, Harken offers moreHYCZ040 220255 BCCXXXXpowerful push/pull double-acting vangs. Todays ever-larger, stiffer hull structures and heavier roller-furling booms dramatically increase compression loads on megayacht boomAction Typevangs. This can result in cylinder rods buckling. Harken helpsZ = Double-acting vangprevent this by transferring loads to the outer housing tube, eliminating the load on the rod. Please contact Harken forV = Single-acting vangmore information on these designs. Bore Diameter (mm)Ordering Boom VangsRod Diameter (mm)All vangs are made to order. Specify desired PCLC (pin centerStroke Length (mm)length closed) in millimeters rounded to the nearest 10mm. Standard vangs are black hardcoat-anodized aluminum withMaterials rod clevis and cylinder end clevis. B = Black hardcoat-anodized aluminumC = Clear-anodized aluminumP = Painted aluminumRod End Fittings C = ClevisCylinder End Fittings C = ClevisPCLC (mm)Seal/Repair Kit Part NumberHYKRCSXXXXXKTypeR = RepairS = SealCylinder TypeV = Single Acting VangZ = Double Acting VangBore (XX or XXX) Rod Sold After 2014 (If sold before 2014 please STANDARD BOOM VANGS contact Harken)Single-acting vang cylinderSeal Kit Part NumberHYKSCXXXXXCustom Vang Part numberMEGAYACHT BOOM VANGSDouble-acting vang cylinder252'