D81 Isolation Ring



  • This Isolation ring is ideal for measuring pressures of viscous slurry media, utilizing a flow-through system that eliminates clogging or pressure blocking from occurring
  • Designed for installation in water treatment facilities, mining and pulp & paper plants


  • Various materials/configurations available to fit your specific application
  • Unique WinCONNECT fitting allows for easy field removal of gauge or switch for calibration, repair or replacement without interrupting process flow
  • Thicker break-resistant instrument stem
  • Optional tees for installation of multiple instruments
  • ASME B40.100 compliant
  • 5 year warranty


Sensor Type
WIR Wafer, nests inside bolt circle
RIR Full flange (150# standard, 300# optional)
SIR Threaded connections
Pipe I.D. 1” – 48” 1" (25mm) up to 48" (1,220mm).  Consult factory for larger sizes
Centre Section
C Carbon Steel
S 316 SS
End Plates
S 316 SS
A Acetal
H Hastelloy® C
T Titanium
U UHMW / Ultra High Molecular Weight Polyethylene
Elastomer (Sleeve)
N Neoprene (-20°F to 220°F)
B Nitrile (Buna N) (-20°F to 180°F)
E EPDM (-20°F to 300°F)

Fluoroelastomer (FKM) (-4°F to 392°F)

R Natural rubber (-49°F to 212°F)
Fill Fluid
SF Silicone (standard)
GF Glycerin
GW Glycerin and Water
Instrument Connection 4N 1/4″ NPTF
2N 1/2″ NPTF

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