A diaphragm seal pressure gauge is a device used to measure pressure in challenging or hazardous media.
It is specifically designed to protect the pressure sensing element from corrosive, viscous, or high-temperature fluids.
The gauge consists of a standard pressure gauge connected to a diaphragm seal.
The diaphragm is a flexible membrane that isolates the process fluid from the gauge mechanism.
Pressure from the process fluid is transmitted through a fill fluid behind the diaphragm.
This transmission allows accurate measurement without direct contact with the medium.
Diaphragm seals are commonly used in chemical, pharmaceutical, and food processing industries.
They are ideal for applications involving slurry, sticky, or crystallizing substances.
The seal prevents clogging and damage to the internal parts of the gauge.
Various diaphragm materials are available, such as stainless steel, Teflon-coated, or exotic alloys.
The design can handle sanitary requirements in hygienic applications.
These gauges can be customized with different capillary lengths and configurations.
They are suitable for both high-pressure and vacuum measurements.
Proper selection ensures durability, accuracy, and long service life.
Overall, diaphragm seal pressure gauges provide reliable pressure measurement in demanding environments.Diaphragm seal pressure gauges are specialized instruments designed to isolate the gauge mechanism from aggressive, high-temperature, or viscous media using a flexible membrane. They offer robust protection in chemical, petrochemical, and food industries. Key specs include pressure ranges from vacuum to 1000 bar, high overpressure safety (up to 5x), and versatile material options (316L, Hastelloy, Tantalum) to prevent clogging and corrosion.
Diaphragm Material SS316L
Pressure Range 0–25 bar
Process Connection SMS Union
Dial Size 1.5 inch / 40 mm
Use Process Industries
Display Type Analog
Wetted Material SS316
Pressure Type Gauge Pressure
Filling Fluid Silicone Oil
Connection Type - 990.18, THREADED CONNECTION
Pressure Range – The minimum and maximum pressure the gauge can measure.
Accuracy – Degree of precision, typically expressed as a percentage of full-scale value.
Diaphragm Material – Material of the diaphragm (e.g., stainless steel, PTFE-coated, Hastelloy) based on compatibility with the process fluid.
Fill Fluid Type – Liquid used between diaphragm and gauge (e.g., silicone oil, glycerin) for pressure transmission.
Operating Temperature – Temperature limits for both process fluid and ambient conditions.
Process Connection – Type and size of connection (threaded, flanged, sanitary fittings).
Capillary Length – Length of the capillary tube (if remote mounting is used).
Seal Type/Design – Flush diaphragm, extended diaphragm, or in-line seal depending on application.
Mounting Type – Direct mount or remote mount configuration.
Overpressure Limit – Maximum pressure the diaphragm seal can withstand without damage.
