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Items starting with O

Once-through oil

Once-Through Oil Vacuum Pumps. These pumps, also called OTO pumps, are the sliding-vane type that uses once-through oil to seal clearances and lubricate moving parts. Vanes are in slots in a rotor, mounted eccentrically to the pump chamber. As they rotate, centrifugal force pushes the vanes against the chamber walls, creating pockets whose size varies. This size variation creates suction which draws process gas into the pump from the vessel being evacuated. Compression occurs as the vanes rotate toward the discharge side of the device, decreasing the area and forcing the gas and lubricating oil against the discharge valve. The discharge valve opens slightly above atmospheric pressure. These pumps can handle acidic or otherwise corrosive vapors, because the once-through oil continuously flushes the vapors out. OTO pumps are usually found in pharmaceutical plants and chemical plants, for drying, evaporation, distillation or other vessel evacuation tasks.

  • SPEC #: 18162
  • Code: 18-06-02

Orifice Flow Transmitter

Orifice Flow Transmitter. A device that measures the flow rate of liquids or gases, and converts that measurement to an electrical signal that can be used to operate an integrated digital or analog readout, or to control another device. The flow is measured through the differences in pressure from the upstream side to the downstream side of an obstruction (the orifice) that narrows flow path and causes the liquid or gas to constrict. The greater the flow, the greater the difference in pressure.

  • SPEC #: 17430
  • Code: 17-04-03


Other Centrifugal Pumps. Centrifugal pumps are the most commonly used type, and are manufactured in myriad types, sizes, and materials. Applications includes palm-sized units used in fish tanks to leviathans used in public works projects. They all, however, rely upon the same physics of converting mechanical energy into hydraulic energy by centripetal force on the liquid.

  • SPEC #: 18130
  • Code: 18-03-10


Material Handling, Ovens: These ovens, used in industrial applications requiring less heat than kilns, are usually located astride or adjacent to material handling conveyors, and are use in applications such as warming refrigerated or thawing frozen materials for subsequent processing.They may employ either conventional or microwave heat sources.

  • SPEC #: 18254
  • Code: 18-15-11

Oxidizer Scrubbers

Oxidizer Environmental Scrubbers. These scrubbers remove noxious odors. They are fixed-bed systems, containing two layers of oxidizing media and, sometimes, a layer of polishing media. There is usually one moving part, a blower. Foul air goes in, clean air comes out. There are no chemicals to add and there is no maintenance to do for the service life of the scrubber.

  • SPEC #: 18222
  • Code: 18-12-02