W61522SSS-TTDWD-AS on PT45P1A2P16-D-T-HV
W616W1SSS-TTB05-BH-R2 on Autrol APT3100
W6M5W2SSS-8GRTR-BH-R1 on Yokogawa EJX530
Configure Now
Request a Quote


REOTEMP’s Threaded Offline Welded Diaphragm Seals are designed with an upper and lower housing bolted together with a diaphragm welded to the upper housing. This removable design allows for easy cleanout of the seal chamber, while still maintaining the system fill. The threaded offline diaphragm seal can be adapted to fit almost any pressure instrument and process application.

  • Welded Diaphragm for Maximum Durability
  • Wide Variety of Diaphragm and Material Options
  • Continuous-duty Disc Protects from Process Fluid Leaking in the Event of a System Breach
  • Easy Cleanout of Diaphragm Cavity without Compromising Filled System

Construction Materials

Upper Housing (Non-wetted): 316SS, Nickel-plated Steel
Diaphragm (Wetted): 316SS, Hast C-276, Tantalum, Monel, others
Gasket (Wetted): PTFE, Grafoil, Klinger
Lower Housing (Wetted): 316SS, Hast C-276, Monel, CPVC, others

Process Temperature Limits

W51/W61 W5K/W6M/W5H
Metallic Lower PTFE Gasket -110/350F -110/400F
Klinger Gasket -110/450F -110/500F
Grafoil Gasket -40/600F -40/750F
Non-Metallic Lower 140°F N/A

Ambient Temperature Limits

Determined by the Pressure Instrument

Minimum Recommended Span

W5 W6
2.5” & 3.5” Gauges 15 psi 15 psi
4”, 4.5”, & 6” Gauges 30 psi 30 psi
Transmitter (Gauge Pressure) 150” H2O 150” H2O
Transmitter (Differential Pressure) 300” H2O 300” H2O
Differential Pressure Gauge (D40/42 Only) N/A N/A

Maximum Working Pressure at 100°F

Bolts Grade 5 Grade 8 18/8SS 316SS
Metallic Lower W51 2,500 2,500 1,500 1,500
W5K 5,000 5,000 3,000 2,500
W5H 10,000
W61 1,500 1,500 1,000 750
W6M 2,500 2,500 2,000 2,000
Non-Metallic Lower 300 300 300 300

Download Data Sheet: