Hy-power Clamps Pvt. Ltd. Offers Single / Double Acting Hydropneumatic Intensifier. Hy-power Clamps Pvt. Ltd. Is an ISO 9001:2000 accredited company. Single / Double Acting Hydropneumatic Intensifier is widely used on conventional machines, where hydraulic power unit is not available with the machine. Single / Double Acting Hydropneumatic Intensifier has one oil cylinder and one air cylinder. The pistons of both these cylinders are connected to each other. In single acting intensifier, the air cylinder is single acting, spring return. In double acting intensifier, the air cylinder is double acting. The air piston is the driving piston and the oil piston is the driven piston, in both the types.