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Type: P791, P792


Service intended


P790 series diaphragm seal are suitable for conditions where the process medium can cause corrosion to the instrument connection and the pressure sensing element, which the process medium contains suspended solid particles are viscous and be clossed. It is also suitable for where the process medium can freeze or solidify the internal parts of the instrument and where the medium requires flushing from the system to prevent contamination.




Instrument welded diaphragm with threaded process connection, require hydraulic fluid to transmitter pressure to instrument.


Filling liquid


Silicone oil


Working temperature


Ambient : -20 ~ 65 °C
Fluid : Refer to filling liquid reference table


Diaphragm material


Diaphragms are available in many corrosion resistant materials. Compatibility of selected material and process fluid should be determined by the user


Temperature effect


Accuracy at temperature above and below the reference temperature (20 ℃) will be effected by approximately
±0.5 % per 10 ℃ of full scale



Standard features


Upper flange (Gauge side)


Stainless steel (304, 316), Titanium, Monel


Diaphragm material


Stainless steel(316L) Hastelloy C-276, Titanium, Tantalum, Monel


Pressure connection


Thread type : PT, PF, and NPT others feasible
Flange type : ANSI(ASME), JIS or other standard




Capillary : Ø3.0 mm, 316L
Flexible tube : Ø7.5 mm, 304, PVC coated




PTFE lining is available up to 7 MPa (Coating)



Download:  CATALOG 

Đồng hồ áp suất dạng dây màng P791 P792

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