Auxiliary Boiler (Oil-Fired) · Boilers
The Cochran ST49 is a three-pass, wet-back horizontal steam boiler, and the Low NOx version is built to BS EN 12953 for the efficiency and emission demands of the Medium Combustion Plant Directive. The maker states that this compliance depends on the other plant and equipment in the boilerhouse. It also lists compliance with the Factories Act (1961) and the BG01 safe-operation guidance of SAFED and the CEA.
The marking is UKCA, UKNI+CE or CE, covering the Pressure Equipment Directive plus the Low Voltage, Electro-Magnetic Compliance and Machinery Safety Directives. During manufacture a leading independent insurance company inspects the boiler, and Cochran applies its own quality procedures that comply with ISO 9001. Each boiler has a heat recovery section with a single or twin exhaust gas stream, and named heat sources are incinerators, micro turbines, diesel engines and gas engines. A bypass damper and flue ductwork arrangement is part of the feature list.
Working pressure is normally 10 Barg and can be raised to as much as 30 Barg as an option. Low NOx combustion equipment is standard, and combustion and control packages as well as superheater and economiser options can be chosen. Turndown is up to 7:1. The Eclipse or Synergy touchscreen HMI from Cochran has a Modbus interface and remote access capability. Variable speed drives on the FD fan and feed water pump motors are said to cut noise and power consumption.
Sources: Cochran datasheet ST49, checked 05.10.2026
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“Fired Section: Boiler front and rear casings are fabricated from mild steel plate fully welded to the Boiler tubeplates and shell.”Source: Cochran ST49 datasheet, p. 1
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