Pneumatic Push-Type Tensioners. Signode pneumatic push-type combination tools, including the PNSC and the PRH-Series models, are used with the push-type seals on irregular-shaped packages. Air Power tensions, seals and cuts the strapping. All pneumatic tensioners are furnished with a quick-disconnect plug. It is essential that an air filter-regulator-lubricator assembly be installed andead of the tool on the air line.