Isolation Rings by Ashcroft

Ashcroft Isolation Ring
Ashcroft Isolation Ring
Ashcroft Isolation Ring

 Moving heavy waste material is hazardous duty for pumps. This is especially true in settling and sedimentation tanks, where solids separate by sinking to the bottom and are then pumped to the next processing stage in the form of sludge or slurry. Even though they are specifically designed for this work, these pumps can be easily damaged if inadequately monitored and controlled.

The greatest threat to pumps is cavitation. This phenomenon occurs when the suction side of the pump is starved, usually due to a blockage in the line. This lowers the suction pressure below the fluids saturated vapor pressure point, causing bubbles to form. As the bubbles are carried over to the discharge side where the impeller has raised the pressure, the bubbles will collapse. These implosions will cause shockwaves that will damage the impeller, shaft and the inside of the housing. The same consequence occurs when high discharge pressures cause the fluid to circulate inside the pump, intensifying the fluid velocity between the impeller and the housing causing bubbles to form.

To avoid cavitation, keep pipes, screens and inlets clear of clogs. Monitor the pumps suction and discharge pressures. This can be achieved by installing an instrument assembly that includes an 80, 81 or 82 isolation ring or diaphragm seal with a flush port (such as the type 201) or a flush mounted DF seal. Instrumentation can include a 1279 Duragauge pressure gauge, a GC51 transmitter for remote monitoring and a B4 pressure switch to send an alarm signal to safely shut down the pump in case an alarm condition occurs.
 

80 Series Wafer Isolation Ring

The Ashcroft 80 isolation ring is mounted inline with process piping. Used for process protection of measuring instruments, the ring-design eliminates process accumulation, assuring accurate pressure readings. Ideal when continuous pressure measurement is needed.

80 Series Wafer Isolation Ring by Ashcroft 80 Series Wafer Isolation Ring Key Features: 

  • 360 sensing flexible inner-liner; no process dead leg
  • Safe Quick Release (optional) enables instrument removal without loss of fill or process shutdown
  • Needle valve (optional) dampens pulsation effects
  • Retrofit end plates (optional) allows easy replacement of other manufacturer models


Download Ashcroft 80 Series Wafer Isolation Ring Datasheet 
Ashcroft 81 Series Bolt Thru Isolation Ring


81 Series Bolt Thru Isolation Ring

The Ashcroft 81 isolation ring is mounted in line with process piping. Used for process protection of measuring instruments, the ring-design eliminates process accumulation, assuring reliable and accurate pressure readings. Ideal when continuous pressure measurement is needed.

81 Series Bolt Thru Isolation Ring Key Features:

  • 360 sensing flexible inner liner; no process dead leg
  • Safe Quick Release (optional) enables instrument removal without loss of fill or process shutdown
  • Needle valve (optional) dampens pulsation effects
  • Retrofit end plates (optional) allows easy replacement of other manufacturer models


Download Ashcroft 81 Series Bolt Thru Isolation Ring Datasheet


82 Series Threaded Isolation Ring

The Ashcroft 82 isolation ring is threaded in-line with process piping. It is designed for threaded piping systems to protect pressure measuring instruments. The ring-design eliminates process accumulation, assuring accurate readings.

  Ashcroft 82 Series Threaded Isolation Ring 82 Series Threaded Isolation Ring Key Features: 

  • 360 sensing flexible inner liner; no process dead leg
  • Safe Quick Release (optional) enables instrument removal without loss of fill or process shutdown
  • Needle valve (optional) dampens pulsation effects


Download Ashcroft 82 Series Threaded Isolation Ring Datasheet


Process Markets:

  • Water and Wastewater
  • Mining
  • Pulp and Paper


Contact us at (855) 737-4714 to learn more or fill out our online form.

Short description

Ashcroft's isolation rings help eliminate particle traps, allowing the instrument to function properly.