Pressure Measurement & Control


Pressure measurement in paper production

July 2011 Pressure Measurement & Control

It is said that pressure measurement is one of the most important control functions in the paper-making process. This means that the pressure measuring instruments need to be robust and able to deliver stable measurements over long periods.

Vega has successfully installed its differential pressure transmitter, Vegadif 65, at several paper production facilities in Germany. This instrument copes well where steam, condensate, temperatures up to 190°C and pressures up to 12 bar are involved.

The Vegadif 65 is used in conjunction with differential pressure flow elements for the measurement of flow in the steam feed system, where it records precisely the pressure difference at the orifice plates or Pitot tubes.

The steam feed is used in several ways. Steam heated cylinders in the drying section of the paper machine remove residual moisture from the paper. Vegadif monitors the heat transfer from the drying cylinder to the paper via a differential pressure measurement between the inlet and outlet.

The condensate that forms on the inside wall of the cylinder is continuously skimmed off via a siphon and collected in condensate containers. Vegadif is also used here for level measurement from residual steam (at temperatures up to 100°C) and overpressure.

The Vegadif 65 has extremely versatile mounting options and can measure flow, level, interface or density change in vessels. For example it can be mounted with a direct connection or connection via an impulse line on tubes to measure flow rate; in a unilateral isolating diaphragm configuration for pressure measurement of level in ventilated or open containers; in a bilateral isolating diaphragm configuration for level measurement in vessels with head pressure and in a bilateral isolating diaphragm configuration for density or interface measurement.

For more information contact John Groom, Vega Instruments SA, +27 (0)11 958 1901, john.groom@za.vega.com, www.vega.com



Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Upgrade for PSM-700 pressure switch
May 2020, WIKA Instruments , Pressure Measurement & Control
WIKA’s PSM-700 pressure switch with large adjustable switch differential is now able to withstand higher process temperatures. Previously, the process media was limited to a temperature range of -30...

Read more...
Hygienic food production
June 2020, VEGA Controls SA , Pressure Measurement & Control
Food production is a matter of trust, and hygiene is the number one priority in the manufacturing process. Success is determined by both the reliability and the efficiency that make flawless production ...

Read more...
Upgrade for PSM-700 pressure switch
June 2020, WIKA Instruments , Pressure Measurement & Control
WIKA’s PSM-700 pressure switch with large adjustable switch differential is now able to withstand higher process temperatures. Previously, the process media was limited to a temperature range of -30ºC ...

Read more...
Vega’s solutions for pharmaceutical applications
May 2020, VEGA Controls SA , Pressure Measurement & Control
The special challenges faced by the pharmaceutical industry result from the wide diversity of its processes. Success depends on the consistency and continuity of the production processes, whether it be ...

Read more...
New compact radar sensor
April 2020, VEGA Controls SA , Level Measurement & Control
A new era in radar level measurement began a few years ago when Vegapuls sensors based on 80 GHz technology were introduced. Thanks to the more precise focusing of the radar beam, the sensor virtually ...

Read more...
Neglected pressure gauges can lead to downtime and disaster
Technews Industry Guide: Maintenance, Reliability & Asset Optimisation 2020, SA Gauge , Pressure Measurement & Control
Pressure and temperature gauges are often the most used instruments in a plant. Gauges are relatively inexpensive and because of their large quantity, gauge maintenance is often neglected, resulting in ...

Read more...
VEGA extends portfolio for pharmaceuticals production
February 2020, VEGA Controls SA , Pressure Measurement & Control
The reliable and lasting performance of VEGA’s proven instrument portfolio has enabled plant operators to monitor and control with great precision chemical, thermal or biological processes, often under high temperatures and pressures.

Read more...
Intrinsically safe electronic pressure gauges
January 2020, Instrotech , Pressure Measurement & Control
Instrotech now offers Keller’s range of intrinsically safe electronic pressure gauges for use in areas subject to gas explosion risks. The type approvals are compliant with the ATEX Explosion Protection ...

Read more...
Pressure sensors with touchpads
December 2019, Turck Banner , Pressure Measurement & Control
Turck has launched its new PS+ series pressure sensors, a modular range that enables access to reliable measuring instruments with intuitive operation. The sensors are easily commissioned and overhead ...

Read more...
Pressure measurement converter for harsh conditions
December 2019, Instrotech , Pressure Measurement & Control
Kobold’s PNK pressure measurement converter is used for the remote electrical transmission of pressure signals. For use in heavy machinery, engines, shipbuilding and automotive engineering, this robustly ...

Read more...