Servomex Tough Flue Gas 2700 Flow Alarm Relay Box, Model 02720

Overview

The Servomex 2700 flow alarm relay box for the Tough Flue Gas 2700, model 02720933, is a support component for Servomex flue gas analyser installations, housing the flow alarm and relay functions used to monitor sample gas flow in the analysis system. The box is constructed around an industrial control panel enclosure and is configured with pressure indication and flow measurement instruments.

It is part of the Servomex Group’s flue gas analysis product line and provides the flow alarm, pressure monitoring, and relay switching functions required for reliable analyser operation in combustion and emissions monitoring applications.

Engineering & Design

The relay box is fitted with a McDaniel Control pressure gauge with 316 stainless steel tube and socket, range 0-30 psi, and a bronze tube brass socket gauge, range 0-60 psi, providing pressure indication for the sample conditioning system. Flow indication is provided by King Instruments meters including a 2-10 SCFM air flow meter (P/N 74C108G061323710) and a 1-6 SCFM meter (P/N 75303125C03).

Flow alarm set points are configured on the instrument panel, with the PFI1 and PR1 set points documented on the unit nameplate. The complete assembly is housed in a Hoffman Pentair industrial control panel enclosure protecting the components in the analyser room environment.

Key Features

• Flow alarm relay box for Servomex 2700 systems
• Model 02720933 complete assembly
• McDaniel pressure gauges (0-30 psi and 0-60 psi)
• King Instruments flow meters (2-10 SCFM and 1-6 SCFM)
• Configured flow alarm and pressure set points
• Hoffman Pentair industrial enclosure
• Supports flue gas analyser sample system

Applications

• Flue gas analysis sample conditioning
• Combustion efficiency monitoring support
• Emissions monitoring systems
• Analyser room auxiliary equipment
• Replacement and spares for Servomex 2700 installations

Specifications

Analyser reliability depends on the supporting sample system, and the Servomex 2700 flow alarm relay box provides that support, which is why Seven Star LLC supplies the Servomex 2700 flow alarm relay box for flue gas analysis installations.

The Servomex 2700 flow alarm relay box receives the flow status of the flue gas oxygen analyzer and repeats the alarm condition to the boiler control system. The unit is wired between the analyzer output and the plant DCS, and the relay set point is adjusted to the minimum flow of the sampling line. The enclosure is mounted on the panel near the analyzer and is provided with the terminal strip for the field wiring.

The Servomex 2700 relay box is compatible with the Servomex 2700 flue gas analyzer series and is connected to the analyzer alarm output. The relay is rated for the 230 V AC auxiliary circuits and the set point is configured with the internal potentiometer. The box is provided with the fixing holes for the panel mounting and the cable entry is arranged for the standard gland. The spare relay box is exchanged in the few minutes without the analyzer shutdown.

Why Seven Star LLC

Seven Star LLC supplies the Servomex 2700 flow alarm relay box for analyser support systems across the Gulf, with careful component verification and technical documentation. Our team assists with identifying the correct assembly for your flue gas analysis installation.

We support combustion and emissions monitoring customers with reliable B2B supply of analyser spares and auxiliary equipment throughout the GCC.

Sample System Function

The relay box monitors the sample gas flow and pressure that keep the analyser supplied with a representative sample, and the alarm set points trigger maintenance attention when flow degrades. The McDaniel pressure gauges and King flow meters give the operator direct indication of the conditioning system state.

Because the assembly is built around a Hoffman Pentair enclosure with documented components, it can be matched to existing Servomex 2700 installations for replacement or spare support.

Also available: Servomex Micro i.s. 5100 Portable Oxygen Analyzer

Request a Quote for SERVOMEX TOUGH FLUE GAS 2700 FLOW ALARM RELAY BOX, MODEL: 02720

For the Servomex 2700 flow alarm relay box, Servomex 02720 relay box or any related control and instrumentation requirement, contact the Seven Star LLC team. Submit a formal inquiry through our RFQ page with your configuration and application details, and our specialists will respond with a detailed commercial proposal and the official Servomex documentation.

Matching a Replacement Relay Box

This is a system assembly rather than a catalogue component, so the safest way to confirm a replacement is from the existing unit. Before placing an enquiry, collect:

• the full model number from the nameplate (02720933 on this assembly) and any serial or job number;
• the set points recorded on the nameplate, including PFI1 and PR1;
• part numbers and ranges of the fitted flow meters and pressure gauges;
• the analyser model and serial number the box serves, and photos of the enclosure door, internals and terminal strip.

If only individual instruments have failed, a gauge or flow meter with the same range and connection may be all that is needed, which is usually quicker than replacing the full box.

Installation and Commissioning

• Isolate the analyser sample and electrical supplies and follow site permit procedures before working on the box.
• Transfer field wiring one terminal at a time and label conductors, so alarm contacts return to the correct DCS or annunciator inputs.
• Leak-test all tubing connections after installation; a small leak upstream of the analyser can bias flue gas readings.
• Set flows to the values in the analyser documentation, then simulate a low-flow condition to prove the alarm reaches the control room.
• Record as-left set points and flow readings for the maintenance history.

Routine Checks and Troubleshooting

During routine rounds, compare flow meter and gauge readings with the values recorded at commissioning. A gradual fall in sample flow normally means a partly blocked filter or probe, not a fault in the box itself. Nuisance alarms can come from pulsating flow, wet sample reaching the flow meters, or a set point too close to the normal operating value. Check that flow meter tubes are clean and readable, and replace gauges that do not return to zero when depressurised.

Applications in Oman and the GCC

Flue gas analysers support combustion control and emissions reporting on boilers, heaters and furnaces in power plants, refineries and petrochemical sites across the region. Dusty, hot conditions put extra load on sample systems, so regular filter maintenance and verified flow alarms play a direct part in keeping analyser data valid for compliance.

Sourcing Through Seven Star LLC

Send us the nameplate details and photos of your existing assembly. We will compare the components against your installation and confirm availability and lead time for a complete box or individual instruments.

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