SEALED DIAPHRAGM GAUGES

Diaphragm seal is a protection device used to prevent corrosion,clogging or freezing of bourdon tube of pressure instruments used in difficult fluids. The seal consists a thin corrugated diaphragm that separates the pressure instrument from the process fluid. The space above the diaphragm and to the pressure element is filled with SEAL FLUID (siilicon oil) which has got alow cubical expansion for greater temperature stability. Process pressures causes the diaphragm to expand/contract, which further causes displacment of the 'liquid fill'. This displacement is transmitted directly to the pressure element in the gauge. The sealed diaphragm unit can be fitted directly to the gauge or can be connected through capillary tubing for remote mounting. The measuring system is filled under vacuum at the factory which ensures total removal of any air bubble which may otherwise cpntribute towards calibration error. Available in 4", 6" Dial. Case can be Die cast aluminum with screwed type bezel or SS 304 with bayonet type bezel. The upper chamber of the sealed unit can be MS / SS 304 or SS 316.The diaphragm can be SS316 / MONAL / HASTELLOY-C / TANTALUM or any special material. Accuracy: ±1%. These Gauges are used to measure the pressure of corrosive fluids, Petroleum products, chemicals, Syrups, Fats etc.

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