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Cointra

SpainBoiler Spare Parts

Cointra is a manufacturer of thermal-management components for gas-fired heating systems, with a product line centered on boiler spare parts and burner-control hardware. The company's catalog addresses the operational needs of atmospheric and forced-draft boilers used in commercial and industrial settings, covering everything from gas nozzles and thermostatic valves to safety thermostats, thermocouples, and ignition control modules. Cointra's components are engineered for integration into both OEM boiler units and third-party service applications, with standardized geometries that facilitate cross-unit compatibility. For example, membrane diameters of 36×44 mm and valve ports in M10 and M5 sizes are common across the range, allowing maintenance teams to source replacements without custom machining. The control modules, such as the MICROFLAT series, are designed for non-permanent operation with or without a fan, featuring a 2–4 mm spark gap and low consumption of 2.5 VA. These modules offer both non-volatile and volatile lockout logic, with SELV-type safety circuits compliant with 24 V DC standards, making them suitable for safety-critical burner management. Cointra's product families include heat exchangers, safety probe bulbs, control levers, immersion heater gaskets, and safety thermostats (e.g., NC 145°C), which are typical replacement items in boiler maintenance cycles. The components are manufactured to tolerances that support reliable performance under thermal stress, addressing common failure modes such as carbon buildup on nozzles, thermal fatigue in membranes and seals, and wear in spark electrodes or valve stiction. For plant engineers and maintenance managers, Cointra provides a dependable source for routine service parts and emergency repairs, ensuring that boiler fleets can be restored to operation with minimal downtime. 3G Electric supplies the full Cointra line globally, offering procurement specialists a single point of access for these components, with detailed specifications and cross-reference support to match parts to existing equipment. Whether the application involves a single boiler unit or a multi-unit plant, Cointra's standardized parts simplify inventory management and reduce the risk of compatibility issues. The brand's focus on practical, field-proven designs makes it a staple in the heating industry, particularly for systems that require robust, repeatable performance in continuous or intermittent duty cycles. By stocking Cointra components, 3G Electric supports the maintenance and repair needs of industrial heating infrastructure, from small commercial boilers to larger process heating systems, ensuring that operators have access to quality parts that meet original equipment specifications.

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About Cointra

Cointra is a manufacturer of thermal-management components for gas-fired heating systems, with a product line centered on boiler spare parts and burner-control hardware. The company's catalog addresses the operational needs of atmospheric and forced-draft boilers used in commercial and industrial settings, covering everything from gas nozzles and thermostatic valves to safety thermostats, thermocouples, and ignition control modules. Cointra's components are engineered for integration into both OEM boiler units and third-party service applications, with standardized geometries that facilitate cross-unit compatibility. For example, membrane diameters of 36×44 mm and valve ports in M10 and M5 sizes are common across the range, allowing maintenance teams to source replacements without custom machining. The control modules, such as the MICROFLAT series, are designed for non-permanent operation with or without a fan, featuring a 2–4 mm spark gap and low consumption of 2.5 VA. These modules offer both non-volatile and volatile lockout logic, with SELV-type safety circuits compliant with 24 V DC standards, making them suitable for safety-critical burner management. Cointra's product families include heat exchangers, safety probe bulbs, control levers, immersion heater gaskets, and safety thermostats (e.g., NC 145°C), which are typical replacement items in boiler maintenance cycles. The components are manufactured to tolerances that support reliable performance under thermal stress, addressing common failure modes such as carbon buildup on nozzles, thermal fatigue in membranes and seals, and wear in spark electrodes or valve stiction. For plant engineers and maintenance managers, Cointra provides a dependable source for routine service parts and emergency repairs, ensuring that boiler fleets can be restored to operation with minimal downtime. 3G Electric supplies the full Cointra line globally, offering procurement specialists a single point of access for these components, with detailed specifications and cross-reference support to match parts to existing equipment. Whether the application involves a single boiler unit or a multi-unit plant, Cointra's standardized parts simplify inventory management and reduce the risk of compatibility issues. The brand's focus on practical, field-proven designs makes it a staple in the heating industry, particularly for systems that require robust, repeatable performance in continuous or intermittent duty cycles. By stocking Cointra components, 3G Electric supports the maintenance and repair needs of industrial heating infrastructure, from small commercial boilers to larger process heating systems, ensuring that operators have access to quality parts that meet original equipment specifications.

Common Applications

  • Industrial boiler maintenance — Cointra thermostatic valves (M5, M10S) for burner control in atmospheric gas boilers
  • Commercial heating systems — Cointra MICROFLAT control modules for ignition and flame safety in non-permanent duty burners
  • Process heating plants — Cointra safety thermostats (NC 145°C) for over-temperature protection in hot water loops
  • Gas-fired equipment repair — Cointra butane gas nozzles (5L) for precise fuel metering in portable and stationary burners
  • Boiler retrofitting — Cointra heat exchangers (model 7843) for replacing corroded or failed units in existing systems
  • Preventive maintenance — Cointra immersion heater gaskets and safety probe bulbs (6.5mm) for sealing and temperature sensing in boiler vessels
Origin: Manufactured in Spain

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Frequently asked questions

Common questions about Cointra from 3G Electric.

What are the key specifications of Cointra MICROFLAT burner control modules?

The Cointra MICROFLAT series is designed for atmospheric gas burners in non-permanent operation, with or without a fan. Key specs include a spark gap of 2–4 mm, low consumption of 2.5 VA, and both non-volatile and volatile lockout options. The safety circuit is SELV type, compliant with 24 V DC standards. These modules are suitable for burner management in boilers where safety and reliability are critical, offering lockout logic that prevents unsafe operation after a fault.

Are Cointra thermostatic valves compatible with different boiler models?

Cointra thermostatic valves, such as the M5 and M10S models, are manufactured with standardized port sizes (M5 and M10) and membrane diameters (e.g., 36×44 mm) to ensure compatibility across a range of boiler units. This standardization allows them to be used as direct replacements in OEM boilers and third-party service applications. Always verify the specific valve model and port size against your boiler's requirements to ensure a proper fit.

What is the function of the Cointra safety thermostat NC 145°C?

The Cointra safety thermostat NC 145°C is a normally closed (NC) thermal cutoff device that opens its contacts when the temperature exceeds 145°C, interrupting the gas supply or burner operation to prevent overheating. It is a critical safety component in boiler systems, protecting against thermal runaway. This thermostat is typically used in the water circuit or flue gas path and is a common replacement part during boiler maintenance.

How do Cointra gas nozzles for butane gas differ from natural gas nozzles?

Cointra gas nozzles are calibrated for specific gas types and pressures. For example, a 5L butane gas nozzle is sized for the higher calorific value and lower supply pressure of butane (typically 28-30 mbar) compared to natural gas (20 mbar). Using the correct nozzle ensures proper air-fuel mixture and combustion efficiency. Cointra nozzles are available in various flow ratings, and it is essential to select the right one for your gas type to avoid incomplete combustion or sooting.

What is the purpose of the Cointra safety probe bulb (e.g., 6.5mm)?

The Cointra safety probe bulb is a temperature-sensing element used in boiler safety systems, typically connected to a capillary tube and a control device. It detects water or flue gas temperature and sends a signal to the thermostat or gas valve to regulate burner operation. The 6.5mm diameter is a standard size for insertion into thermowells or direct immersion. It is a critical component for maintaining safe operating temperatures and preventing boiler damage.

Can Cointra heat exchangers be used as aftermarket replacements?

Yes, Cointra heat exchangers, such as the model 7843, are designed as spare parts for boiler systems. They are manufactured to match original dimensions and thermal performance, making them suitable for aftermarket replacement. When selecting a heat exchanger, ensure it matches your boiler's model and heating capacity. Cointra's standardized designs help facilitate cross-unit compatibility, but always confirm the part number and specifications with your equipment documentation.