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Solutions for pressure, temperature, force and level measurement, flow measurement, calibration and SF6 gas solutions from WIKA are an integral component of our customers' business processes.
This is why we consider ourselves to be not just suppliers of measurement components but rather more a competent partner that offers comprehensive solutions in close co-operation with our customers – customised and precisely designed products for the exact requirement.
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All Welded System (AWS) Diaphragm Seals: The Problem Solver
Committed to constant improvement, WIKA Instrument, LP collaborated with diaphragm seal users in the process industry to identify problems they had with traditional diaphragm seals. WIKA’s findings resulted in the design of the All Welded System, whichsolves problems associated with traditional seals.
Problem: Clamping bolts loosened in vibration and thermal cycling applications.
Solution: WIKA’s body construction welds together the upper and lower halves of the diaphragm body. The clean welding design supports vibration and thermal cycling applications, and eliminating the traditional hardware of bolted seals also reduces the space requirements for the assembly.
Problem: O-Ring and/or gaskets were not always compatible with the process being used.
Solution: The diaphragm is recessed and welded to the lower body of the AWS using a TIG weld technique. Eliminating O-Ring and gaskets eliminates process compatibility issues and enhances the instrument’s upper temperature limits while also maintaining material compatibility between the lower body and the diaphragm.
Problem: The thread contact between the gauge and seal changed in extreme temperature and vibration applications and during instrument installation and orientation.
Solution: The seal upper housing, designed to mate with the threads of the process gauge, is welded, enabling the thread contact to be fully resistant to thermal cycling, vibration, and incorrect installation. The back weld ensures that integrity is always maintained between the instrument and the seal. Plus, it eliminates the potential loss of system fill fluid through the threads, a particularly critical issue with this NPT connection. Because the gauge cannot be unthreaded from the diaphragm seal, the assembly qualifies as a dual-containment system.
Additionally, WIKA’s AWS assembly is fully traceable. Order and material information is engraved on the gauge,
All-welded system