pControl 2F
Backpressure Controller for process gas analysis

pControl 2F

  • Eliminate pressure errors at the source.
  • Quick and precise pressure control under extremely wide range of gas flow.
  • A single pControl-system is suitable for use with multiple gas analyzers.
  • Description
  • Technical Data
  • Downloads

Description

In the field of gas analysis an analyzer's response is often dependant upon the sample gas pressure. Pressure dependency can occur through a number of different physical parameters simultaneously and can be difficult to impossible to correct for. The best and most accurate approach is therefore to control the pressure itself. The use of an LFE pControl backpressure controller alleviates the need for complicated correction algorithms.

A further benefit of an LFE pControl backpressure controller is e.g. the return of the analyzed gases back into the process. In this way unnecessary emissions into the environment can be avoided.

The LFE pControl backpressure controller typically operates at approximately 0.2 bars above ambient pressure (i.e. 1.2 bar absolute), but can be easily set to other operating pressures.

The specially designed control valve of the LFE backpressure controller provides for an extremely constant pressure over an extremely wide range of gas flow (e.g. <10 ln/h up to over 1000 ln/h). This allows for a single LFE pControl to be used in conjunction with a number of gas analyzers.

The piezo-resistive pressure transducer is temperature controlled to improve stability. An optional PTFE isolating diaphragm is available to improve corrosion resistance.

Technical Data

Property Specifications
Housing Cast aluminum purgable housing for wall mounting Protective class IP65;
HxWxD: 230 x 330 x 185mm
Power supply 100 - 240VAC  50 - 60Hz
Range of flow Example: setpoint at 1.2 bar with 1.0 bar backpressure at outlet
< 10 ln/h  up to  >1000 ln/h
Read-out LC-display (text and graphics) user interface based on NAMUR[1] recommendation
Instrument Status Plain text description on the LC-display as well as categorization into one of the following states (NAMUR[1] recommendation):
INSTRUMENT FAULT, MAINTENANCE REQUIRED, MAINTENANCE
Analog signal output 0(4) - 20 mA (isolated and configurable)
Digital outputs 3 configurable, floating contacts for instrument status- or threshold monitoring
Analog input (optional) isolated 0(4) - 20mA input for optional external setpoint control

Downloads

The following documents are currently available for download in Adobe® PDF-format or in Microsoft® Word format:

Product /
Document type		 Language File name File
format		 File
size
English German
pControl 2F - Backpressure Controller
Brochure x 23_info_en.pdf pdf 129 KB
General information
Brochure x LFE_info_overview_en.pdf pdf 118 KB

Technical specifications subject to change without notice

[1] NAMUR: Standardization commission for measuring and control technology in the chemical industry (sub-committee for operability of microprocessor-controlled process analytical- instrumentation)