NRG Global Instruments

Diaphragm seals or Remote Seal Differential Pressure Transmitters are traditionally used when a standard pressure transmitter should not be exposed to the process pressure directly. Diaphragm seals typically protect the pressure transmitter from one or more damaging aspects of the process media.

Extended Diaphragm Seal is ideal for highly viscous and dry powder applications. Its unique design eliminates dead space in piping. It is often used for flush mounting in thick-walled vessels and is available in standard and custom lengths.Construction Materials

316L or Hast C-276

Process Temperature Limits

-110°F to 750°F

Ambient Temperature Limits

Determined by the Pressure Instrument

The diaphragm seal is a pressure-transmitting, diaphragm-type device. The pressure signal is sent to the cooperating pressure measuring device (pressure transmitter, pressure gauge) through manometric liquid filling the space between the separating diaphragm of the seal and the pressure measuring device. The diaphragm seal task is to isolate the pressure measuring device from damaging impacts caused by either medium or installation: – low or high temperature, increased viscosity, impurities; – vibrations of the installation (remote diaphragm seal).

Diaphragm seal systems are used for demanding measuring requirements with extreme medium temperatures of -90 °C up to +400 °C in the process industry. The diaphragm seal assemblies protect the measuring instrument from aggressive, corrosive, heterogeneous, abrasive, highly viscous or toxic media.

With this service, the total costs of the diaphragm seal system can be clearly lowered. In this way, the service life of the measuring instrument can be fully utilised and only the diaphragm seal assembly needs replacement or repair, preventatively or after failure. With preventive maintenance, scheduled in line with planned shutdowns to your plant, you can reduce downtimes.

Service can be done both on a mounted process transmitter as well as on a mechanical measuring instrument. Depending on the application case, the service life of the process transmitter is longer than that of the wetted parts. Therefore, only in rare cases must defective diaphragm seal systems be replaced completely, i.e. including the process transmitter. By re-using the process transmitter, WIKA offers a service package with clear cost savings.

With the replacement service, through the exchange of the diaphragm seal, the TCO (total cost of ownership) of the measuring location can be reduced considerably.

Your benefits

• Cost saving
• Fast availability by saving time
• Functional test of a process transmitter
• Current material test certificate
• New calibration of the entire system

A Tri Clamp Sanitary Diaphragm Seal Pressure Transmitter is a specialized pressure measurement device designed for hygienic applications, especially in food, beverage, pharmaceutical, and biotech industries. It combines a pressure transmitter with a sanitary diaphragm seal and a tri-clamp connection to ensure sterile, cleanable, and contamination-free pressure measurement.

A Digital Pressure Transmitter is an advanced pressure measurement device that converts pressure into a digital signal, providing accurate, real-time pressure data with enhanced features compared to traditional analog transmitters.

The high performance absolute and gauge pressure transmitter PT124B-3502 feature single crystal silicon resonant sensor and are suitable to measure liquid, gas, or steam pressure. It gives an output of 4 to 20mA HART signal corresponding to the measured pressure.

A High Temperature Pressure Transmitter is a pressure measurement device designed to accurately measure pressure in environments with elevated temperatures, often exceeding the limits of standard transmitters. It is engineered to withstand and operate reliably in harsh, high-heat process conditions.

A Flush Remote Seal Level Transmitter is a specialized pressure-based level measurement device designed for applications where direct contact between the sensor and process fluid is problematic due to corrosiveness, high temperature, or clogging materials.