Electro-hydraulic control units Electro-hydraulic control units (2 – 24 functions) are designed for fully automatic control of longwall operations. Learn more Electro-hydraulic control units for low seam operations These electro-hydraulic control units are used to control hydraulic cylinders of roof supports in low seam operations. Learn more Electro-hydraulic control unit with multi-hose These electro-hydraulic control units are used to control hydraulic cylinders of roof supports in low seam operations. Learn more