Single Acting Flat Jacks are ideally suited where clearance is minimum for insertion of jack. Orione Hydraulics Pvt. Ltd. Manufactures Single Acting Flat Jacks. Orione Hydraulics Pvt. Ltd. Also manufactures Hydraulic Jack, tools and Equipments. Single Acting Flat Jacks are offered in compact design. It is equipped with Mounting holes for easy fixturing. It is used for structural weld positing, rigging in bridge construction, heavy fabrication and maintenance.