Diaphragm Seal - Threaded Offline Welded Metallic
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THREADED OFFLINE WELDED DIAPHRAGM SEALS
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
Specifications
Construction Materials
Diaphragm (Wetted): 316/316L SS, Hast C-276, Tantalum, Monel A400, Nickel 201, or Others Lower Housing (Wetted): 316/316L SS, Hast C-276, Monel A400, Alloy 20, Hast B, 304/304L SS, or Others Gasket (Wetted): Klinger C-4401, PTFE Durlon 9600, Grafoil, Kalrez, or Virgin PTFE Upper Housing (Non-wetted): 316/316L SS, 304/304L SS or 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 | 200” H2O |
| 4”, 4.5”, & 6” Gauges | 30 psi | 200” H2O |
| Transmitter (Gauge Pressure) | 150” H2O | 60” H2O |
| Transmitter (Differential Pressure) | 300” H2O | 60” 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 psi | 2,500 psi | 1,500 psi | 1,500 psi |
| W5K | 5,000 psi | 5,000 psi | 3,000 psi | 2,500 psi | |
| W5H | – | 10,000 psi | – | – | |
| W61 | 1,500 psi | 1,500 psi | 1,000 psi | 750 psi | |
| W6M | 2,500 psi | 2,500 psi | 2,000 psi | 2,000 psi | |
| Non-Metallic Lower | 300 psi | 300 psi | 300 psi | 300 psi | |
Datasheet & Drawings
Datasheet Download Threaded Offline Welded Seals Datasheet
Installation Instructions
Download Installation Instructions: