Because of the proprietary and competitive nature of many of the following applications, it is not possible to publish the specific details of each. However, all of the following applications are presently live or in the advanced stages of field trial indicating superior performance of Hydrowype wipers as compared to alternative wipers.
Application Example 1: Military Aircraft Landing Gear
A-Series; Copper-Alloy Hydrowype wipers have been in use for many decades to protect retractable landing gear and actuator rods from the ingression of ice and other contaminants into the actuator cylinders. The protection of the internals of these cylinders is particularly important due to the potential for freeze/thaw damage resulting from any ice entering the system. These rods are typically in the range of 3-4" in diameter, and therefore present a relatively large frontal zone for scraping. In some situations where the aircraft duty cycle is high and field maintenance is necessary, the two-piece (AG-Series), fully split wiper body is used, allowing for wiper replacement while the aircraft is parked and without major tear down of the landing gear assembly. Brass, Bronze and Copper-Beryllium are preferred materials in these applications.
Application Example 2: Steel Mill Line Handling Equipment: A & D-Series
Copper-Alloy Hydrowype wipers are in common use throughout steel mills, for example on billet conveyers/handlers. A-Series wipers constructed of Bronze and in some cases Stainless Steel, are installed on cylinders operating only inches away from semi-molten billets, exposed directly to ambient temperatures exceeding 1000°. Molten steel and oxides often splatter onto the rod and must be cleaned upon a single retraction. Brass and Bronze are preferred materials for these applications.
Application Example 3: Glass Manufacture: D-Series
Copper-Alloy Glass manufacturing equipment is constantly exposed to fine particlesof ground glass, thickly coating cylinder rods between strokes. Given a cylinder size constraint (diameter), custom D-Style Hydrowype wipers energized through an interference fit communicated by an O-ring installed into a special groove on the OD of the wiper have been used to allow for robustness with minimum space consumption. The O-ring performs several functions in addition to interference, including holding the wiper inside an installation lip machined into the aperture of the gland, thus avoiding the need for any additional retaining system. In this way, this Hydrowype wiper serves as a true snap-in, self-retaining wiper to ease installation. Brass is the preferred material for these applications.
Application Example 4: Batch Mixer Equipment: Custom A-Series
Copper-Alloy Batch mixers are used to perform a wide range of rubber compounding tasks and contain an integral Ram which during mixing operations is exposed to rubber compounds possessing very high potential for adhesion. Removing this rubber during Ram retraction is the job of the OEM installed A-Series Rod wiper. Bronze is the preferred material for these applications.
Application Example 5: Crop Harvest
Hydrowype wipers are used across a wide range of agricultural applications, in particular where dust comprised of a mixture of dislodged soil and fine-particles of oil-saturated vegetable solids combine and adhere to the rod surface as a highly viscous emulsion. The combination of lubricity of the oils and high rate of adhesion, create the potential for the wiper to ride over the contaminants which could lead to large scale ingression. A particularly aggressive wiping angle generated by an accentuated taper on the wiper ID, with a high pre-load on the compression spring, combine to overcome this material and successfully dislodge it within a single compression stroke. Brass and Stainless Steel are preferred materials for these applications.