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Diaphragm Seal. This type consists basically of a flange whose dimensions match those of corresponding standard Seal are located at the center of the flange and bottom mounted.
Type are used for thick walled isolated production Pipes , Vessel Walls , etc. Their construction are very similar to
the flange type diaphragm seal and they mounted on same manners. In this type diaphragm is located on pipe
whose length is matched to the thickness of the casing. The diaphragm sits flush with the inner face of the Vessel Wall.
As above both types only capillaries take places in between basic sensor and sensing point diaphragm.
Nasha Automation Chemical Seal Diaphragm System can use for pressure & Differential Pressure Transmitters to protect Basic sensing element of transmitter. It is the separating or protecting seal for the Measuring Instruments & Separatists from the Pressure medium , it Measures Low & High Rating Pressure Even under High Temperature.
Our Graduate Engineers & 14 years of experience in Process Instrumentation
Keep capillary lengths as short as possible. Never mount seals & capillaries in direct sunlight.
Use capillaries of the same length on both taps when measuring differential pressure. Be sure that both capillaries experience the same temperature. For instance, avoid installing one capillary in a shady area & the other in the sun.
This eliminates zero shift that results from unequal thermal expansion & contraction of the fill fluid in the high & low legs.
The most common application of diaphragm seals is for level measurement. Proper ranging of a transmitter for level services requires considering the specific gravity of both the fill fluid & the process fluid.
With dual-leg pressure transmitters, mismatched fill volumes (unequal lengths of capillary), degree of mismatch between seals (same sizes trend to offset any unbalance, though not completely) or uneven temperatures on seals & capillaries can affect the readings.
Seals with a large measuring surface provide better results. The amount of error attributable to significant changes in either the process or ambient temperature varies widely with the combination of seal, capillary & fill fluid.
Nasha Automation is having seal diaphragm in SS 316, SS316L, Hestalloy C & Tantalum material for better solution with customer solution.