Application Cases of Pressure Transmitters

Application Cases of Pressure Transmitters

Pressure transmitters deliver core values of accurate pressure measurement, signal remote transmission, and linkage control, and are suitable for scenarios such as hazardous working conditions, unattended operation, and remote operation and maintenance. The following are 6 typical cases in industrial and municipal fields, highlighting improvements in safety, energy conservation, and efficiency.

I. Petrochemical Industry: Overpressure Protection for Hydrogenation Reactors (Explosion-Proof + Corrosion-Resistant Diaphragm)

- Scenario: Real-time pressure monitoring is required for hydrogenation reactors containing H₂S in Zone 1 hazardous areas to prevent overpressure explosions and enable remote diagnosis.

- Solution: Ex d IIB T4 explosion-proof transmitter with Hastelloy diaphragm, HART protocol, and linkage with safety valves and DCS.

- Effect: The overpressure accident rate is reduced by 90%; the service life is extended to 8 years with a control accuracy of ±0.1%FS; remote operation and maintenance cut annual labor costs by 180,000 yuan.

II. Power Energy: Feedwater Pressure Monitoring for Thermal Power Plant Boilers (Split-Type + High-Temperature Adaptation)

- Scenario: Stable pressure measurement is required for the boiler feedwater system under high temperature (300℃) and high pressure (0-40MPa) to calculate thermal efficiency.

- Solution: Split-type transmitter (with separated sensor and main unit) featuring high-temperature resistance design, with 4-20mA signal linked to the regulation system.

- Effect: Power generation efficiency is improved by 1.5%; accurate capture of load fluctuations saves 2.5 million kWh of electricity annually and reduces unplanned shutdowns by 80%.

III. Municipal Water Supply: Constant Pressure Water Supply for Waterworks Booster Pump Stations (Digital + VFD Linkage)

- Scenario: Multi-pump station pipe networks require pressure control within ±0.05MPa to reduce leakage and energy consumption.

- Solution: Digital pressure transmitters with RS485 communication, linked with frequency converters for closed-loop pressure control and centralized management of multiple loops.

- Effect: Leakage rate is reduced from 15% to 5%; water supply pressure fluctuation is controlled within ±0.05MPa; annual electricity costs are saved by 1.2 million yuan and operation and maintenance efficiency is improved by 40%.