Membrane switches are designed for use in areas where normal switches would fail due to high moisture or contamination.
Industrial Air Compressors are used for a variety of applications from breathable air for SCUBA and firefighting, to powering industrial tools for manufacturing.
Load Cells are used for measuring force. They can be used to weigh goods, or to measure compression or tension in industrial settings.
If you're looking for valve information, there are sites about check valves, butterfly valves, and ball valves.
Chillers are used for cooling water for use in refrigeration, food preparation and a host of other tasks.
Waterjet Cutters are used for precision cutting of hard-to-cut items. They use a blast of water to pierce the object being cut