Model 990.TB

All-welded mini seal

Large, with threaded process connection

Selected documents
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  • Process industry diaphragm seal to combine with Bourdon tube pressure gauges.
  • Intended for corrosive, contaminated, hot or viscous pressure media.

Special Features

  • Large Mini Seal
  • Threaded Process Connection
  • All Welded design


Upper and lower housing welded with integral diaphragm It requires hydraulic fluid to transmit pressure to instrument

Process Connection
¼" or ½" NPT-female, other see options

Instrument Connection
¼" or ½" NPT-female

Suitable Pressure Ranges (MWP 2500PSI @250°F)
2 ½" gauge: 15 PSI to 2500 PSI
4 or 4 ½" gauge: 15 PSI to 2500 PSI

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