Miniature Tank Heater (MTH) | ATEX/IECEx/UKEX Certified
EXHEAT | Distributed from Stock | International Delivery | Competitive Prices | Contact Us Today
EXHEAT MTH
The MTH (Miniature Tank Heater) by EXHEAT is a smaller range of ‘plug and play’ immersion heaters providing a complete solution for the heating of liquids in a hazardous area where space is at a premium.
EXHEAT MTH mini tank hazardous area immersion heater provide certified heating for Zone 1 & Zone 2 (Flammable Gas) and Zone 21 & Zone 22 (Dust) hazardous areas and explosive atmospheres according to ATEX Directive.
Each EXHEAT MTH is designed with specific fittings for direct immersion while incorporating both process set-point control and over-temperature trip electronic circuitry – therefore it requires no additional control or safety components to operate.
The inclusion of bespoke electronic PCB allows for greater accuracy and lower hysteresis when controlling the process temperature, when compared with traditionally used mechanical temperature switches.
A compact, sleek Ex d anodised aluminium enclosure houses the electronics, this provides an ideal solution when space is limited. Suitable for ambient temperatures as low as ≤40°C to ≤60°C. Designed for long term stability as well as the option for yearly calibration to ensure maximum accuracy.
➡ Available from UK stocks. Contact our technical sales team who can help to custom numerous options for all requirements.
EXHEAT MTH Flameproof Mini Tank Heater
EXHEAT is a globally renowned manufacturer of hazardous area electric process heating and control systems – Thorne & Derrick, Experts in Equipment for Explosive Atmospheres, are the largest stockist and supplier of EXHEAT heaters in the UK including ATEX, UKEx & IECEx certified electrical heating products.
EXHEAT Miniature Tank Heater (MTH) – Dimensions & Features
| Certifications | ATEX/IECEx/UKEX II 2 G DEx d IIC T6…T1 Gb Ex tb IIIC T85°C….T450°C Db (IP66/68)SIL – Hardware assessed for use in SIL applications |
| Cable | 3m standard – longer available on request |
| Element options | 15mm elements 321 Stainless Steel as standard |
| Materials | Body: Anodised aluminium 6082 T6 Boss: Stainless steel 316 Element: Stainless steel 316 |
| Mounting | Threaded 321 stainless steel boss suited to client requirements. Available in a range of sizes in BSP, NPT and Metric fittings |
| Installation | Horizontal installation |
| IP rated | IP66 |
| Mains input | 230VAC (+/-10%) nominal voltage as standard, suitable to work between 220V-254V. 110-120V available on request. |
| Process fluid | Suitable for most oil grades and water applications |
| Accuracy | +/- 2°C |
| Ambient operating temperature | ≤40°C to ≤60°C |
| Set point control | -40°C to 75°C |
| Calibration temperature | 20°C to 25°C |
EXHEAT Industrial Ltd experience in producing heaters suitable for use within hazardous areas and their range of custom made heaters means EXHEAT and Thorne & Derrick can provide a heating solution for almost any situation. The range of process heaters and industrial heaters are manufactured in the UK. EXHEAT have over 20 years experience which guarantees the customer receives highest quality product.
Thorne & Derrick are leaders in the development and distribution of ATEX & IECEx Product Innovations that deliver significant improvements to clients plant, people and operational safety in the explosive atmosphere industries.
Your proactive problem solvers experienced in succession planning for the replacement of obsolete, non-conformant and legacy equipment in hazardous areas.
Your first-choice provider of innovative and competitive solutions to ensure ATEX & IECEx Compliance for Hazardous Area Electrical, HVAC & Process Instrumentation Equipment to UK and international projects.
Panels | Plugs | Isolators | Enclosures | Lighting | Control Stations | Motor Starters | Heat Trace | Gas Detection | Flame Detection | Process Instrumentation | Process Heating | Fans | Security Locking & Access Control | ATEX Enclosures
Hazardous Area Lighting Design Service
Thorne & Derrick are distributors and stockists for the Raytec SPARTAN range of ATEX lighting using LED technology for the illumination of hazardous area locations and potentially explosive atmospheres. Raytec are world leaders in LED lighting for hazardous area environments; their range of globally certified Ex LED lighting is approved for all ATEX, IEC Ex & UKEX Zone 1 and Zone 2 hazardous area environments, including UL /CSA C1D2 (Class 1 Division 2) installations.
Using the latest software, we can provide a FREE LIGHTING DESIGN SERVICE for the specification and supply of ATEX & IECEx light fittings to provide safe and reliable lighting in hazardous areas and industrial locations.
A 3D design plan is used to provide you with a visual representation of what the final installed lighting solution will actually look like, demonstrating the lux levels and spread of light that will be achieved on scene.
Lighting Design VideoRaytec can produce video designs of your final lighting scheme. Providing a 3D walk-around, this offers a real life insight into how the installation will perform – from all angles.
2D and 3D lighting plans can also be provided in a pseudo colour view, providing illuminance mapping of the intensity and spread of the light output across the site. This is used to show that the area has been evenly illuminated which is crucial for achieving the highest level of safety and security.
Lighting PositionsRaytec lighting is highly targeted, providing only the right amount of light needed on scene for maximum efficiency and minimum waste. Plotting the beam direction shows the precise aiming point of each LED panel, the angle of elevation and exact position of each luminaire.
Note: Directional lighting can allow for a much lower lumen output!
A 2D lighting design is used to plot the individual light fittings onto your site CAD drawing. It indicates the direction and spread of the lighting, and uses contour lines to show detailed lux levels within different areas. This type of design explains exactly how Raytec will achieve the desired outcome and can be used as a guide during the installation stage.
Raytec Photometric data can be used by other engineers and designers within lighting design software to create your own tailored lighting schemes using Raytec White-Light LED luminaires.
Raytec manufacture on-site in the UK, which allows them to integrate all staff under one roof. This encourages knowledge sharing and the build of a true centre of excellence.
Not only are SPARTAN luminaires frequently delivered within 2 weeks but Thorne & Derrick, in partnership with Raytec, are also able to produce bespoke lighting solutions and exceed the expectations of our customers. We are proud to work with clients on the design and supply of world leading products which are manufactured in the UK, enabling the fast delivery of lighting systems.
Following successful efforts to support with lighting designs, Thorne & Derrick have recently secured an order from an industrial Tier 2 COMAH site. Working closely with senior stakeholders, we provided a lighting solution for vehicle maintenance bays which were located on multiple large sites across the UK. Whilst the bays were not classified as an explosive area, the client wanted to maintain consistency across sites. Thorne & Derrick had previously supplied Raytec Spartan hazardous area light fittings to the client, and were asked to provide a lighting design and solution using Raytec Warrior fittings (The newly launched heavy industrial range).
The WARRIOR Linear range is ideal for new installations or to retrofit existing fluorescent installations which require high performance, reliable, White-Light illumination. Using Raytec’s field-proven, long-life LED technology, the Linear is specifically designed to provide battery back-up illumination for challenging environments and operation.
Pictured: Thorne & Derrick lighting design – produced as part of a contract to design and supply hazardous area lighting to a new build tank farm.
Following the successful specification, supply and installation of the light fittings to the the client, Thorne & Derrick have now been added to their approved vendor list – allowing the quick supply of future equipment.
Raytec have produced a series of sample hazardous area lighting applications, showing an in depth demonstration of 3D modelling, illuminance mapping and calculations.
The following lighting design application is a sample showing an Offshore Rig Lifeboat Drop ATEX application using Spartan Flood White-Light.
Installation: Spartan Flood WL
Products Used: 24 WL – SPX-FL24-W (72W)
Crucial measurements of the area and mounting heights of luminaires must be communicated in writing along with special site conditions, if any.
All specification changes must be communicated to Raytec in order for the design to be modified appropriately.
A Maintenance factor of 0.85 is generally used in our calculations and is in accordance with European standards e.g. EN12464 and CIE 154:2003 guidelines.
The following values are based on exact calculations on calibrated lamps, luminaires and their arrangement. In practice, gradual divergences can
occur.
Luminance in the illustration:
Minimum: : 0 cd/m²
Maximum: : 2470 cd/m²
Artificial light calculation : Direct part, with 1 inter-reflections
Read The Full Case Study Here ➡ ATEX Lighting Design | Offshore Rig Lifeboat Drop
Further Reading
ATEX lighting design is an essential part of specifying lighting for any onshore or offshore location.
For specifiers going through the initial design process, a lighting design will provide peace of mind that the final solution will achieve the required, on-site lighting goal, with no surprises at the point of commissioning. Achieving the correct light levels on-site will improve safety and efficiency.
Thorne & Derrick work with Raytec to provide a hazardous area lighting design service that is completely free of charge, providing you with a visual 3D representation of the final lighting solution, with detailed lux levels and a true indication of lighting performance. Our lighting design experts will guide you through the entire process, ensuring the optimum solution is achieved.
Industry leading manufacturers of Lighting Products for hazardous areas | Raytec
SPARTAN is a full range of Ex LED luminaires and lighting approved for all ATEX and IEC Ex Zone 1 and Zone 2 hazardous area environments, including UL /CSA C1D2 installations. The hazardous area lighting products are designed for the most extreme environments – Flood, Linear, Bulkhead, Bay and Crane luminaires with emergency and industrial lighting versions are also available from Thorne & Derrick International.
Specialists to the Process & Hazardous Area Industries
Thorne & Derrick are leaders in the development and distribution of Product Innovations that deliver significant improvements to clients plant, people and operational safety in the explosive atmosphere industries.
Your proactive problem solvers experienced in succession planning for the replacement of obsolete, non-conformant and legacy equipment in hazardous areas.
Your first-choice provider of innovative and competitive solutions to ensure ATEX & IECEx Compliance for Hazardous Area Electrical, HVAC & Process Instrumentation Equipment to UK and international projects.
Control Panels | Plugs | Isolators | Enclosures & Junction Boxes | Lighting | Control Stations | Motor Starters | Heat Trace | Gas Detection | Flame Detection | Process Instrumentation | Process Heating | Ventilation Fans | Security Access Control | ATEX Enclosures
Below Thorne & Derrick explain and investigate the dangers of working in a confined space and how to mitigate risks with the use of correctly certified and fully compliant equipment.
There is a range of specialised equipment such as lighting, power, heat, ventilation & portable gas detection, as well as codes of practice, regulations and standards directly aimed to provide protection for workers in confined spaces.
Ensuring workers can safely carry out maintenance, repair and installation works in hazardous area locations with potentially explosive atmospheres is critical for any employer.
Unfortunately a lack of understanding, poor working practices and a failure to carry out pre-entry checks are the main causes of incidents when working within a limited space.
Guidelines and legislation are in place to help protect those exposed to the risk and it is the employers responsibility to carry out risk assessment and implement safe systems of work to protect their employees.
Working in a confined space is dangerous because of the risks from noxious fumes, reduced oxygen levels, or a risk of fire. Other dangers may include flooding/drowning or asphyxiation from some other source such as dust, grain or other contaminant.
It is one of the most highly focused areas of occupational safety, but some may question why there is so much attention and whether it is justified.
Let’s start by understanding what is a confined space?
“The definition of confined spaces is often misunderstood, misinterpreted, and misapplied in the hazardous area industry”
A confined space is one which is both enclosed, or largely enclosed, and which also has a reasonably foreseeable risk to workers of fire, explosion, loss of consciousness, asphyxiation or drowning – – HSE | Health & Safety Executive UK
What are the main factors that determine it?
UK HSE regulation states that under domestic law (the Health and Safety at Work etc Act 1974) any space of an enclosed nature where there is a risk of death of death or serious injury from hazardous substances or dangerous conditions (eg lack of oxygen) employers are responsible for ensuring the safety of their employees and others. This responsibility is reinforced by the following regulations:
The Confined Spaces Regulations 1997
Apply where the assessment identifies risks of serious injury from work in confined spaces.
These regulations contain the following key duties:
The Management of Health and Safety at Work Regulations 1999
Require employers and self-employed people to carry out a suitable and sufficient assessment of the risks for all work activities for the purpose of deciding what measures are necessary for safety. For work in confined spaces this means identifying the hazards present, assessing the risks and determining what precautions to take.
Some confined spaces are more easily recognisable than others:
However a confined space is not always substantially enclosed and can include:
There is no complete list as a place not usually considered to present confined space hazards may become one eg a spray booth can introduce risks to an enclosed space normally considered free of contaminants and to have a safe level of oxygen.
Hazardous Area Confined Space Entry
If hazardous conditions are present, a permit specifying safety measures and names of those permitted in the space must be written before any work can take place. All workers should be informed of the hazards with entry and exit signposts if required.
Reducing fire hazards and safety risks in confined spaces requires suitable equipment being used in these areas. This requires hazardous area certified explosion-proof heating, lighting, ventilation and power supply systems – a start-to-finish safety and rescue plan will review the specific equipment needed.
HSE’s document explains the importance of personnel wearing PPE when entering a confined space, whether its an employer providing for their employee, or self-employed. PPE must also be fully maintained on a regular basis.
“Hazards such as high or low oxygen levels, cannot be seen, and have no smell.”
Best practice suggests that workers who are undertaking work in confined space are advised to have Level 2 & 3 qualifications. This could be to carry out work, as a top man supporting entry or conducting emergency rescue and recovery. However, there level 5 qualification is advised for those who manage confined space entry.
The Confined Spaces (Water) scheme records certifications of individuals and provides the water industry and its employers assurance of the level of technical competence achieved by individuals who enter, supervise or manage work in low, medium or high risk confined spaces within the water industry.
City and Guilds also provide qualifications. with the 6150 qualifications being replaced by 6160 Confined Spaces. The updated qualification content is based on the National Occupational Standards developed by Energy & Utility Skills for the industry. These qualifications are for those who have to enter, supervise or manage confined spaces. They are short course single unit qualifications and are supported by the Health and Safety Executive.
Confined Space Entry HEAT | VENTILATION | POWER | LIGHT
➡ Thorne & Derrick stock and supply a number of products that can help alleviate some of the risks.
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The LinkEx™ WF-250XL LED Floodlite is designed to give the optimum level of light for working in smaller hazardous area confined spaces. Available in high and low voltage models, it is ideal for 24 volt applications with a limited power supply, where up to 8 floodlights can be connected from just one Wolf transformer. It produces over 3,000 lumens of white light, which is more than enough to illuminate a 5m square tank or a similar sized space without dazzling. |
| The cable reel with ATEX Certification enables chains of portable lighting in different confined space and hazardous areas workplace locations to be connected together and extended from one central point, allowing for an increased surface area to be lit fast and with ease.
Operating from 230V or 110V, the cable reel allows for many different hazardous area lighting solutions to accommodate different applications. |
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Portable ATEX heaters can be placed inside the confined space or ducted to provide elevated ambient temperatures to help reduce curing times or ensure the application of paint is carried out as per manufacturer’s instructions.
EXHEAT’s MFH ‘The Bulldog’ is the world’s first truly portable hazardous area fan assisted heater. The Bulldog combines efficient design with simple functionality to provide a Portable Heating Solution for use in Hazardous Environments where the atmosphere is classified as Zone 1/21 and Zone 2/22 (IIA & IIB). |
| Thorne & Derrick & Woodcock and Wilson have combined resources to bring to the market a fully compliant & correctly certified portable ventilation solution for explosive atmospheres that end users can trust.
Compact and robust in design the Exstream range offers an effective option for confined space ventilation for hazardous areas meeting all the users specific needs.
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Crowcon T4 is part of the Crowcon range of portable gas detectors and provides protection in confined spaces against the four most common gas hazards – these hazards are carbon monoxide, hydrogen sulphide, flammable gases and oxygen depletion.
The many advanced features of the Crowcon T4 include rugged, IP65 and IP67-rated housing offering enhanced reliability in harsh environments, 24 hour safety, long battery life, TWA resume feature and an invertible screen. |
Unfortunately people are still killed or seriously injured working in confined spaces in the UK each year. These accidents happen across a wide range of industries, including manufacturing, utilities, maritime, construction and offshore.
This includes workers in the confined space itself and as well as those who may have to step in and help when accidents occur.
Despite legislation and health and safety measures, these incidents highlight that confined space working poses a very high risk and it’s important to ensure that the right people have the correct skills and capabilities for the roles they undertake. Ensuring workers are equipped with the correct PPE and equipment plays a vital role in safe working.
T&D are your first-choice provider of innovative and competitive solutions to ensure ATEX & IECEx Compliance for Hazardous Area Electrical, HVAC & Process Instrumentation Equipment to your UK and international projects.
Control Panels | Plugs | Isolators | Enclosures & Junction Boxes | Lighting | Control Stations | Motor Starters | Heat Trace | Gas Detection | Flame Detection | Process Instrumentation | Process Heating | Ventilation Fans | Security Access Control
Competitive Prices | Extensive Stocks | Technical Support | Express Delivery
Full Compliance & Correct CertificationExstream Fan | Product Spotlight
Thorne & Derrick over the years have listened closely to their customers and extensively researched the market to bring their clients fully compliant and correctly certified hazardous area solutions for the safe use in explosive atmospheres.
This includes product innovations for the heat, light and ventilation of hazardous areas that ends users can trust meet all the latest directives, standards & legislation.
These products deliver significant improvements to clients plant, people and operational safety in the explosive atmosphere industries ensuring ATEX, IECEX & UKEX compliance for Hazardous Area Electrical, HVAC & Process Instrumentation Equipment for UK and international projects.
Unfortunately the Explosive Atmosphere industry suffers from counterfeit, non-compliant and even fraudulently certified equipment. It is the responsibility of the end user to ensure compliance of any equipment before it is put into operation. Equipment located inside hazardous area locations must be protected by suitable methods to limit the risk of an explosion.
➡ To discuss the provision of correctly certified Explosion Proof Equipment for Heating, Lighting, Power & Ventilation which complies to latest ATEX (UKCA) & IECEx Regulations please do not hesitate to contact us – Thorne & Derrick, the Experts in Equipment for Explosive Atmospheres, are committed to supporting DSEAR Regulatory Compliance and COMAH sites throughout the UK.
LIGHT | HEAT | VENTILATION
In the UK The Dangerous Substances and Explosive Atmospheres Regulation (DSEAR) 2002 has been a compliance requirement within industry for many years but one of the biggest issues is actually maintaining compliance.
End users should be able to trust that the information they are being provided with is true and accurate. Regretfully this is not always the case. Over the past 18 months, several non-compliant products have been brought to our attention and the HSE has issued product recalls due to safety concerns.
There are currently innumerable industrial application fans in service as part of hazardous area ventilation systems – often these fans do not meet the non-electrical standards.
Non-compliant fans located in potentially explosive atmospheres should be immediately removed from service as they pose a serious Health & Safety issue due to the significant risk of explosion and the threat to end user’s plant assets and personnel. The independently dual certified IECEx/ATEX portable ventilation and confined space fans are certified to both Electrical & Non-Electrical standards.
Certificates prove compliance with the standards requested by the manufacturer but what if the manufacturer does not seek compliance with all the relevant standards for the product being manufactured? How can a manufacturer claim a fan is ATEX certified if it was never tested or checked for compliance with BSEN14986:2017?
The reality is that some of the components, perhaps the motor and the switch are correctly certified for use in explosive atmospheres, but this DOES NOT mean the complete fan unit will be compliant and safe to use.
Thorne & Derrick & Woodcock and Wilson have combined resources to bring to the market a fully compliant & correctly certified portable ventilation solution for explosive atmospheres that end users can trust.
Stocked & Distributed by Thorne & Derrick | Exstream fans are the market-leading ATEX fan to provide powerful and portable ventilation in hazardous areas – now in use on multiple sites by world leading clients.
The Exstream is the first portable ventilation fan that has achieved tri-certification ATEX, IECEX & UKEX to both Electrical & Non-Electrical standards. From 1st January 2023, ATEX will be replaced in the UK with UKEX. Products without UKEX certification will not be permitted onto the UK market.
The following check-list provides information to clients to ensure their ventilation fans are safe and compliant with ATEX and IECEx requirements for service in potentially explosive atmospheres and hazardous area locations.
➡ To discuss how T&D can assist with compliance, to request a demo (on site or online) or general specification advice contact us today.
Thorne & Derrick are leaders in the development and distribution of Product Innovations that deliver significant improvements to clients plant, people and operational safety in the explosive atmosphere industries.
Your proactive problem solvers experienced in succession planning for the replacement of obsolete, non-conformant and legacy equipment in hazardous areas.
Your first-choice provider of innovative and competitive solutions to ensure ATEX & IECEx Compliance for Hazardous Area Electrical, Heating, Lighting & Process Instrumentation Equipment to UK and international projects.
Sample Application
Installation: Spartan Flood WL
Project Description: This is a sample showing an Offshore Rig Lifeboat Drop are (ATEX) application using Spartan Flood White-Light.
Products Used: 24 WL – SPX-FL24-W (72W)
The Spartan range is the smartest, most efficient and most maintenance friendly solution for Hazardous Area environments.
Crucial measurements of the area and mounting heights of luminaires must be communicated in writing along with special site conditions, if any.
All specification changes must be communicated to Raytec in order for the design to be modified appropriately.
A Maintenance factor of 0.85 is generally used in our calculations and is in accordance with European standards e.g. EN12464 and CIE 154:2003 guidelines.
The following values are based on exact calculations on calibrated lamps, luminaires and their arrangement. In practice, gradual divergences can
occur.
Guarantee claims for luminaire data are excluded.
Relux and the luminaire manufacturers accept no liability for consequential damage and damage which is occasioned to the user or to third parties.
Calculation results, Offshore Rig Lifeboat Drop
3D luminance (raytracing), Variable view
Luminance in the illustration:
Minimum: : 0 cd/m²
Maximum: : 10200 cd/m²
Artificial light calculation : Direct part, with 1 inter-reflections
Luminance in the illustration:
Minimum: : 0 cd/m²
Maximum: : 2470 cd/m²
Artificial light calculation : Direct part, with 1 inter-reflections
| General | |
| Calculation algorithm used | Direct component |
| Height of evaluation surface | 5.10 m |
| Maintenance factor | 0.85 |
| Total luminous flux of all lamps | 114123 lm |
| Total power | 1360.4 W |
| Total power per area (2025.00 m²) | 0.67 W/m² |
| Illuminance | ||
| Average illuminance | Eav | 52 lx |
| Minimum illuminance | Emin | 24 lx |
| Maximum illuminance | Emax | 245 lx |
| Uniformity Uo | Emin/Em | 1:2.19 (0.46) |
| Diversity Ud | Emin/Emax | 1:10.2 (0.1) |
ATEX lighting design is an essential part of specifying lighting for any onshore or offshore location.
For specifiers going through the initial design process, a lighting design will provide peace of mind that the final solution will achieve the required, on-site lighting goal, with no surprises at the point of commissioning. Achieving the correct light levels on-site will improve safety and efficiency.
Thorne & Derrick work with Raytec to provide a hazardous area lighting design service that is completely free of charge, providing you with a visual 3D representation of the final lighting solution, with detailed lux levels and a true indication of lighting performance. Our lighting design experts will guide you through the entire process, ensuring the optimum solution is achieved.
Industry leading manufacturers of Lighting Products for hazardous areas | Raytec
SPARTAN is a full range of Ex LED luminaires and lighting approved for all ATEX and IEC Ex Zone 1 and Zone 2 hazardous area environments, including UL /CSA C1D2 installations. The hazardous area lighting products are designed for the most extreme environments – Flood, Linear, Bulkhead, Bay and Crane luminaires with emergency and industrial lighting versions are also available from Thorne & Derrick International.
Specialists to the Process & Hazardous Area Industries
Thorne & Derrick are leaders in the development and distribution of Product Innovations that deliver significant improvements to clients plant, people and operational safety in the explosive atmosphere industries.
Your proactive problem solvers experienced in succession planning for the replacement of obsolete, non-conformant and legacy equipment in hazardous areas.
Your first-choice provider of innovative and competitive solutions to ensure ATEX & IECEx Compliance for Hazardous Area Electrical, HVAC & Process Instrumentation Equipment to UK and international projects.
Control Panels | Plugs | Isolators | Enclosures & Junction Boxes | Lighting | Control Stations | Motor Starters | Heat Trace | Gas Detection | Flame Detection | Process Instrumentation | Process Heating | Ventilation Fans | Security Access Control
Published 13 Mar 2020
Press Release Date: 02.04.2020 uploaded by Chris Dodds (T&D Sales + Marketing Manager) World’s First Fully Certified ATEX Doors Thorne & Derrick International, the Experts in Equipment for Explosive Atmospheres, today announce the signing of a Commercial Distribution Agreement...
Published 04 Jul 2019
Press Release Date: 04.07.2019 uploaded by Chris Dodds (T&D Sales + Marketing Manager) Category: Stockist Distributor Agreement Announcement Thorne & Derrick International announce that they have signed a Preferred Distributor Agreement with Raytec, the world leading manufacturer of LED...
