Brand: Siemens

Siemens Maxum II Air Bath Heater II Assembly 2021284-001

Name: Siemens Maxum II Air Bath Heater 2021284-001 | Seven Star
Brand: Siemens

Description

Overview: The Heart of Oven Temperature Control

The Siemens Maxum II Air Bath Heater II Assembly, part number 2021284-001, is the Version 2 (Farnam type) air bath heating element used inside the oven of a Siemens Maxum or Maxum Edition II process gas chromatograph. As a forced-convection heater, the assembly is responsible for maintaining the uniform, precisely controlled internal oven temperature that the analyzer’s separation columns and detector modules depend on for repeatable chromatographic performance.

As an independent specialized supplier of Siemens Maxum Edition II analyzer spare parts, Seven Star LLC sources and supplies the Air Bath Heater II Assembly 2021284-001 to refineries, gas plants, and petrochemical complexes across Oman and the wider GCC. Because oven heater failure directly halts analyzer operation, Seven Star LLC helps maintenance teams keep genuine heater assemblies in stock to minimize unplanned downtime.

Working Principle: Forced-Air Convection Heating

The air bath heater assembly works by heating a resistive element positioned in the oven’s internal air circulation path, with a fan continuously circulating heated air around the separation columns and detector modules mounted inside the oven cavity. This forced-convection approach distributes heat far more uniformly across the oven volume than a purely conductive or radiant heating method would achieve, which is essential given that even small temperature gradients across the oven can shift component retention times and degrade quantitative accuracy.

The heater element works in closed-loop coordination with the PECM and RTD temperature feedback sensors, which continuously monitor oven temperature and modulate heater power – typically through the solid state relay switching described elsewhere in the Maxum II’s electronics – to hold the programmed setpoint despite ambient temperature swings, sample stream temperature variation, or column heat load changes during a temperature-programmed analytical run.

Engineering Design of the Air Bath Heater II Assembly

The 2021284-001 assembly is the Version 2 (Farnam-manufactured) design used across the Maxum and Maxum Edition II, MicroSAM, and related Siemens process GC oven platforms, engineered to mount directly into the analyzer’s oven cavity and integrate with the existing air circulation fan and ductwork. Its construction reflects the demands of continuous, unattended industrial operation, where the heater must cycle reliably over years of service without introducing contamination or mechanical failure into the temperature-critical oven environment.

Replacement of the assembly follows standard Maxum II oven service procedure, with the analyzer safely de-energized and cooled before accessing the oven cavity, and correct reassembly of ductwork and fan components verified to preserve the airflow pattern the temperature control loop was designed around.

Key Features

The Air Bath Heater II Assembly 2021284-001 restores dependable, uniform oven temperature control. Key characteristics include:

Version 2 (Farnam type) forced-convection air bath heater element for Maxum oven platforms.
Works in closed-loop coordination with RTD feedback and PECM heater control circuitry.
Provides uniform heat distribution across the oven cavity to protect chromatographic repeatability.
Compatible with Siemens Maxum and Maxum Edition II (and related MicroSAM) oven configurations.
Genuine Siemens part number for correct fit and thermal performance.

Industrial Applications

The air bath heater assembly is a core component in every application a Maxum Edition II analyzer performs, from refinery hydrocarbon monitoring to natural gas quality analysis and petrochemical process streams, since oven temperature stability underpins every chromatographic separation the analyzer runs. It is typically replaced when heater failure alarms appear, when oven temperature stability degrades, or proactively during scheduled oven maintenance.

Seven Star LLC supports refinery instrumentation teams, gas processing operators, and petrochemical maintenance departments across Oman, Muscat, Sohar, and the broader GCC region with sourcing of Maxum Edition II oven heater hardware, helping analyzer houses maintain stable, repeatable chromatographic performance.

Technical Specifications

The table below summarizes the core specifications of the Siemens Maxum II Air Bath Heater II Assembly as supplied by Seven Star LLC.

Parameter	Specification
Model / Part Number	Air Bath Heater II Assembly, P/N 2021284-001
Design	Version 2 (Farnam type)
Heating Method	Forced-air convection
Target Platform	Siemens Maxum and Maxum Edition II Process Gas Chromatograph (also MicroSAM)
Control Interface	RTD feedback via PECM heater control circuitry
Hardware Condition	New, genuine Siemens part number

Why Choose Seven Star LLC for Maxum II Oven Heater Sourcing

An air bath heater assembly that looks like a drop-in fit can still disturb the oven’s carefully designed airflow pattern if the fan integration and ductwork mounting aren’t matched exactly to the Version 2 Farnam-type geometry – and because oven temperature uniformity underpins every chromatographic separation the analyzer performs, a subtle airflow mismatch shows up as retention-time drift rather than obvious fault. Seven Star LLC verifies the exact assembly version and platform compatibility (Maxum, Maxum Edition II, or MicroSAM) against the customer’s specific oven configuration before the part ships. We also help refinery and gas plant instrumentation teams across Oman keep this core heater assembly in planned spares stock, since oven heater failure halts every method the analyzer runs, and we coordinate delivery around scheduled oven maintenance windows across Muscat, Sohar, and the broader GCC.

Request a Quote for Siemens Maxum II Air Bath Heater II Assembly 2021284-001

Seven Star LLC is a dedicated supplier of Siemens Maxum Edition II process gas chromatograph spare parts and oven heater hardware throughout Oman and the GCC. To request a formal B2B quotation, verify current availability and lead time, or confirm compatibility of the Air Bath Heater II Assembly 2021284-001 with your specific Maxum II oven configuration, contact our instrumentation sourcing team today.

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About brand

Most Siemens automation parts are bought by article number, the string beginning 6ES7, 6AV2 or 6GK5 printed on every module. Founded in 1847 and headquartered in Munich, Siemens builds the SIMATIC controllers, SCALANCE networks and SINAMICS drives that plant engineers meet on almost every site. Seven Star LLC, an independent supplier, lists Siemens PLC and I/O modules, HMI panels, industrial Ethernet switches, drives, protection relays, temperature transmitters and gas analyzer spare parts for projects in Oman and the GCC.

Siemens product families on this page

Controller hardware covers the SIMATIC S7-1200 (CPU 1214C with SM 1223 signal modules) and the S7-1500 (CPU 1515-2 PN), with ET 200SP and ET 200M distributed I/O and their IM 155-6 and IM 153-2 interface modules. Operator panels include the KTP700 Basic and TP700 Comfort. SCALANCE XC208 managed switches handle industrial Ethernet. Drives are represented by the SINAMICS G120C compact inverter and the G120X for pumps and fans. From the power side come the SIPROTEC 7SJ85 feeder protection relay and SIVACON S8 switchboards, and from process instrumentation the SITRANS TH320 head-mounted temperature transmitter.

Where Siemens equipment is used

SIMATIC controllers and ET 200 I/O run packaged units, skids and whole process lines in water treatment, oil and gas, cement, food and manufacturing plants. SINAMICS drives control pumps, fans and conveyors, SCALANCE switches form the control network, and SIPROTEC relays protect medium voltage feeders and motors.

Ordering Siemens parts: what we need

Send the complete article number, the functional status or version printed on the module and, for CPUs, the firmware version your project was written for. For drives add power, supply voltage, filter option and fieldbus version. For SIPROTEC relays the long order number or product code is required, because it fixes the hardware and function package. A nameplate photo answers most of these points at once.

Frequently Asked Questions

What does the Air Bath Heater II Assembly do?

It provides forced-convection heating inside the oven of a Maxum or Maxum Edition II process gas chromatograph, maintaining the uniform, precisely controlled temperature the separation columns and detectors depend on.

Why is forced-air convection used instead of direct heating?

Forced convection distributes heat far more uniformly across the oven volume than conductive or radiant heating, since even small temperature gradients can shift component retention times and degrade quantitative accuracy.

How does the heater assembly interact with the PECM?

The heater works in closed-loop coordination with RTD temperature feedback and PECM solid state relay switching, which modulates heater power to hold the programmed oven setpoint.

Is this compatible with the original Maxum platform, not just Maxum II?

Yes, the Version 2 (Farnam type) design is used across the Maxum and Maxum Edition II, as well as related MicroSAM process GC oven platforms.

Does Seven Star LLC supply this part across the GCC?

Yes, Seven Star LLC sources and supplies the Siemens Maxum II Air Bath Heater II Assembly 2021284-001 to refinery, gas processing, and petrochemical customers across Oman and the wider GCC region.

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