W715 with Grade 8 Bolts
W715 with 1/4" NPT Process Threads
Yokogawa Gauge Pressure Transmitter on W715
PC45 on W715
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REOTEMP’s High Accuracy and High Displacement Threaded Diaphragm Seals are ideal for applications where high sensitivity or large fluid displacement is key to proper instrument performance. Designed with a diaphragm welded to the upper housing, the lower housing is detachable from the seal body allowing for easy cleanout of the process cavity without losing system fill. The High Accuracy Threaded Diaphragm Seal is most commonly mounted to Smart Transmitters (Gauge, Differential, and Absolute pressure), low pressure capsule gauges, mechanical DP gauges, and mechanical pressure switches.

  • Extra Large 4.1″ Diaphragm for Maximum Sensitivity
  • Wide Variety of Wetted Material Options
  • 100% Helium Leak Tested Diaphragm Welds
  • Easy Cleanout Design with Multiple Flush Port Options
Diaphragm 316/316L SS, Hast C-276, Tantalum, Monel A400, Nickel 201, or Others
Lower Housing 316/316L SS, Hast C-276, Monel A400, Alloy 20, Hast B, 304/304L SS, or Others
Gasket Klinger C-4401, PTFE Durlon 9600, Grafoil or Virgin PTFE
Upper Housing 316/316L SS, 304/304L SS, Monel A400, or Titanium
Process Temperature Limits PTFE Gasket: -110/400ºF
Klinger Gasket: -110/500ºF
Grafoil Gasket: -40/750ºF
Ambient Temperature Limits Determined by the pressure instrument.
Minimum Recommended Span 2.5” & 3.5” Gauges: 30” H2O
4”, 4.5”, & 6” Gauges: 30” H2O
Transmitter (Gauge Pressure): 15” H2O
Transmitter (Differential Pressure): 15” H2Od
Differential Pressure Gauge (D40/42 Only): 100” H2Od
Weight 12 lbs. Note: weight is approximate.
Maximum Working Pressure at 100ºF: W71 Bolts Grade 8: 1,500 psi
W71 Bolts 316SS: 750 psi
W7N Bolts Grade 8: 4,000 psi
W7N Bolts 316SS: 2,000 psi