Nabertherm Exhaust Chimney with Integrated Axial Fan

Overview

The Nabertherm Exhaust Chimney with Integrated Axial Fan (Part No. 631000141) is an engineered ventilation accessory designed specifically for integration with Nabertherm muffle furnaces equipped with the P330 programmable temperature controller. Unlike passive venting solutions, this unit provides active, dynamically regulated exhaust airflow to manage combustion byproducts, volatile organic compounds (VOCs), and process-generated fumes during high-temperature thermal treatments. Its operation is governed by real-time analog feedback from the P330 controller, enabling proportional fan speed modulation in response to programmed ramp-hold cycles or user-defined ventilation profiles. The chimney’s structural integrity is maintained across extended thermal duty cycles due to its austenitic stainless steel construction (1.4841 / AISI 310S), which resists oxidation and creep deformation up to 1200 °C in the hot zone while isolating the fan module from direct radiant heat exposure.

Key Features

• Direct analog interfacing with Nabertherm P330 controller via standardized 0–10 V DC signal input for closed-loop exhaust management
• Thermally decoupled axial fan assembly housed in a separate ambient-temperature compartment, rated IP54 for dust and splash resistance
• Stainless steel chimney duct with double-wall insulation design to minimize surface temperature rise and reduce convective heat loss
• Modular flange connection compatible with standard Nabertherm furnace exhaust ports (DN100 / 4″ nominal diameter)
• Pre-calibrated airflow performance curve ensuring consistent volumetric throughput (120 m³/h @ 150 Pa) across operating voltage range
• No external power supply required beyond the furnace’s auxiliary 230 V AC circuit—fan draws power directly through integrated terminal block

Sample Compatibility & Compliance

This exhaust chimney is validated for use with Nabertherm muffle furnace models utilizing the P330 controller platform—including but not limited to the L 5/11, L 9/11, and HT 16/17 series. It supports thermal processes compliant with ASTM E1112 (standard practice for laboratory furnace safety), ISO 15190 (laboratory safety management), and EN 61000-6-3 (EMC emission limits). While the chimney itself does not undergo CE marking as a standalone device, its installation conforms to the Machinery Directive 2006/42/EC when used as an integral component of a certified Nabertherm furnace system. For GLP and GMP environments, the analog control architecture enables audit-ready traceability of ventilation parameters when logged alongside temperature data via P330’s RS485 output.

Software & Data Management

The chimney operates without embedded firmware or standalone software. Its functionality is fully dependent on the P330 controller’s internal ventilation logic, which allows users to define fan activation thresholds (e.g., “start fan at 300 °C”, “ramp speed linearly between 400–900 °C”). Process data—including fan status, commanded voltage, and inferred airflow—is accessible via the P330’s Modbus RTU protocol over RS485. When connected to Nabertherm’s optional LabControl or THERMCONTROL software suites, exhaust events are time-synchronized with temperature profiles and stored in CSV or SQL databases with ISO/IEC 17025-compliant metadata tagging (operator ID, furnace ID, timestamp, setpoint deviation). No FDA 21 CFR Part 11 electronic signature capability is provided at the chimney level; compliance is achieved at the controller-software layer.

Applications

• Controlled ashing of biological tissues per AOAC 942.05 and EPA Method 3050B, where consistent off-gas removal prevents re-deposition of volatilized metals
• Calcination of catalyst precursors under inert or oxidizing atmospheres, requiring dynamic purge rate adjustment to avoid thermal shock or particle entrainment
• Thermogravimetric sample preparation for XRD or SEM analysis, where residual carbonaceous fumes must be evacuated prior to cooling to prevent surface contamination
• Quality control testing of refractory materials per ASTM C71, where repeatable exhaust conditions ensure inter-laboratory comparability of shrinkage and phase transformation data
• Research-scale pyrolysis studies involving polymer composites, where VOC evolution kinetics are correlated with real-time fan load current measurements

FAQ

Is this chimney compatible with non-Nabertherm furnaces?
No. Mechanical, electrical, and control interfaces are proprietary to Nabertherm systems featuring the P330 controller. Retrofitting to third-party furnaces requires custom signal translation and structural adaptation.
Does the fan require periodic maintenance or lubrication?
The fan uses sealed-for-life ball bearings and requires no scheduled lubrication. Annual visual inspection of the inlet mesh filter and verification of analog input voltage stability are recommended.
Can exhaust gas temperature exceed 80 °C at the fan inlet?
No. Sustained exposure above 80 °C will degrade motor insulation and bearing grease. A secondary cooling duct or heat exchanger must be installed upstream if process gases exceed this limit.
Is explosion-proof certification available?
Not as standard. The unit carries no ATEX or IECEx rating. For hazardous area use, consult Nabertherm Engineering Services for certified variants with intrinsically safe control wiring and flameproof enclosures.
What is the expected service life under continuous 24/7 operation?
Based on accelerated lifetime testing at 40 °C ambient and 70% rated load, median fan MTBF exceeds 35,000 hours. Chimney body service life is limited only by furnace chamber longevity, assuming proper thermal cycling practices.