Profile: Hoerbiger Service, Inc assist and service with a broad line of products, services and support. A variety of compressor valve designs are available for a multitude of applications, such as air, gas, process, refrigeration and air brake in both lube and non-lube designs. They are offered for high and low pressure, and manufactured in serveral materials, such as carbon steel, stainless of martensitic or austenitic and semiaustenitic grades.