Profile: Heat Exchanger Products Corp is a manufacturer of silicone condenser tube plugs for electrical generating plants, pulp & paper and petro-chemical industries. Our brass tube plugs are made with a brass nut and bolt assembly. We manufacture the collar & washers from a non-water soluble hard plastic called hytrel and the silicone parts are of a vulcanized silicone rubber. These plugs are offered in either double size (two silicone parts) or a single size (one silicone part). The single plugs are used for lower pressures and the doubles are for pressures between 60 psi & 150 psi. We offer two sizes of pre-set torque wrench sets. The sets include two torque wrenches and two accompanying drives. These torque wrenches are simple to use. We offer both large torque wrench set and small torque wrench set. Our silicone tube plugs are ideal for use in fresh or salt water applications and can be used for a temporary fix or to seal a tube permanently.