Wiper GPW: page 2
GPW wipers are protective seals with a double construction — an external wiping lip and an internal sealing element — which simultaneously ensure rod cleaning and the blocking of micro-leaks of oil film at the end of the cylinder. They are the correct solution in industrial applications where traces of oil on the rod or equipment are not acceptable — the food industry, pharmaceutical industry, electronic component manufacturing, laboratories. The double-element construction and complete dimensions are available on the hydsealstore shop, with recommendations for industries with strict cleanliness requirements.
GPW Wipers: Technical Characteristics, Structure, and Advantages of Use
High-quality polyurethane, construction with two distinct functional elements: the external lip cleans the rod during every retraction, removing dust and particles; the internal element stops micro-leaks of oil film that remain on the rod after retraction and that, without GPW, would leak onto the outside of the cylinder head. This combination simultaneously eliminates two problems that are usually treated separately. It operates between -30°C and +100°C, compatible with standard mineral hydraulic fluids. For special fluids, check the technical data sheet. The other sealing components of the cylinder are available in the range of hydraulic seals.
Areas of Application and Resistance of GPW Wipers in Industrial Systems
GPW is found in food or pharmaceutical factories where any trace of hydraulic oil on equipment is unacceptable, in packaging and production lines with strict cleanliness requirements, in laboratories, and in any application where traces of oil on the rod or minor leaks at the end of the cylinder create operational, sanitary compliance, or environmental problems. The double construction justifies the higher price by completely eliminating these problems, while the cost of a single fine or audit shutdown covers dozens of GPW wipers. The available standard dimensions are listed in wipers.
Important Criteria for Choosing the Right GPW Wipers for Hydraulic Applications
GPW is chosen when micro-leaks of oil film at the end of the rod are a confirmed problem or when the cleanliness requirements of the application are strict due to the nature of the process (food, pharmaceutical, electronic). For standard construction site or general industrial applications, an ordinary wiper is sufficient and more economical. The external lip must face outward, while the internal element must be correctly oriented toward the inside of the cylinder — the order and orientation of both elements are essential; an installation error cancels the function. The groove must be thoroughly cleaned. Complementary rod seals are available in rod seals.
Advantages of Purchasing GPW Wipers
GPW wipers have a two-element construction designed both for cleaning the rod and limiting the oil film that may remain on the outside of the cylinder. They are particularly suitable for applications where equipment cleanliness is important and where traces of oil on the external surface must be reduced.
At Hydraulic Seals Store, you can check the available dimensions and the compatibility of the profile with the cylinder being used. During installation, attention must be paid to the orientation of both elements, as each has a different role in the sealing system. For special fluids, it is recommended to check the material compatibility in the technical data sheet. If you need help identifying a GPW, you can send us the groove and rod dimensions.