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Specifying ventilation into a fire compartment has usually meant accepting a compromise somewhere, whether in free area, in fire integrity or in security. The fully louvred SR2 FR doorset is built to remove it, ventilating the opening through a fully bladed leaf while maintaining fire integrity for durations up to 90 minutes, tested to BS EN 1634-1 and classified in accordance with EN 13501-2, and certified to Loss Prevention Standard LPS 1175 Issue 8 at Security Rating 2 (B3). Plant rooms, substations, switch rooms and riser cupboards can therefore be ventilated without weakening either fire compartmentation or the security line.
Doorsets are available in single, double and leaf-and-a-half configurations, opening outward, to suit structural openings ranging from 430mm wide by 1000mm high for a single leaf up to 2400mm wide by 2400mm high for a double, with the achievable range depending on configuration and rating. Each 50mm leaf is fabricated from 50 x 65 x 5mm mild steel angle with 2.5mm louvre blades set at a 49 degree angle, backed by fire block panels and anti-vermin mesh, and hung on a minimum of three factory assembled lift off hinges so that fitting on site remains straightforward. Rear concealed fixings keep the face clean and allow the doorset to sit alongside the wider Sunray louvre range without a visual break.
Manufactured in Ashford, Kent. Datasheets, certification and fitting instructions are available on request.
Structural openings to suit the configuration and rating. Single leaf from 430mm wide x 1000mm high up to 1500mm wide x 2400mm high. Double leaf from 730mm wide x 1000mm high up to 2400mm wide x 2400mm high. Single, double and leaf-and-a-half configurations. Outward opening.
50mm thick leaf manufactured from 50 x 65 x 5mm mild steel angle. Louvre blades in 2.5mm mild steel prime HRPO coil, set at a 49 degree angle. Fire block panels with anti-vermin mesh to the rear. Minimum three factory assembled lift off hinges per leaf. Proprietary reinforcement to suit the specified intruder resistance classification.
Fully welded or demountable framework in 100 x 50 x 3mm mild steel hollow box section with a 100 x 10mm plate threshold. Door stops fitted to the inside of the framework in 40 x 20 x 2mm hollow box section. Other box sections, plates and orientations available on request.
Third party certified fire performance up to E90, giving 90 minutes fire integrity. Tested to BS EN 1634-1 and classified in accordance with EN 13501-2. Duration is specification dependent.
Certified to Loss Prevention Standard LPS 1175 Issue 8. Security Rating 2, certificate number 234t Part 2. Security Rating 2 Mk3, certificate number 234u Part 2. Secured by Design accredited.
Excellent airflow characteristics through the fully louvred leaf. Free area subject to blanking and fire block panel requirements.
Concealed through frame fixing or variable anchorage cleats, welded or demountable, to suit demanding and diverse structural opening layouts. Compatible substrates include blockwork, concrete and structural brickwork. Expansion anchors for masonry and concrete. Perimeter gap sealed with manufacturer approved fire sealant, Sikasil 670 with Sika Sikaseal 414 backer rod.
Bright mild steel heavy duty lift off hinges. Surelock McGill Slimline range multi-point surface mounted locks, including access controlled versions, conforming to BS EN 1125 and BS EN 179. Unique anti-fishing device tailored to the locking system depending on the mode of egress. Sunray surface mounted barrel bolts. Dorma TS 93 overhead door closers conforming to BS EN 1154. Hardware factory fitted as standard.
All steelwork shot blasted prior to paint system application. Primer coat: marine grade corrosion resistant zinc rich primer, 60 to 80 microns thickness. Top coat: architectural grade polyester powder coat, 30% gloss level, 60 to 80 microns thickness. Standard stock colour range of 58 colours. Other colours and finishes available on request at additional cost and with longer lead times.
Packers to partition between Sunray products and structural openings, formed from mild steel hollow box sections or plates. Customisation trims to cover unsightly structural features and finishes. Optional weather canopy fitted above the frame head member for coastal locations and those highly prone to precipitation.
Sunray are the only supplier accredited in the UKPN EAS 07-0000a database to provide louvre doors and systems to UK Power Networks (UKPN),
We are one of the few UK suppliers trusted by over 11 Distribution Network Operators (DNOs) and Independent Distribution Network Operators (IDNOs) to deliver compliant, high-security door solutions for critical infrastructure.
Sunray are proud to be one of the few UK companies that hold ISO 9001, ISO 14001 and ISO 45001
Sunray are the only supplier accredited in the UKPN EAS 07-0000a database to provide louvre doors and systems to UK Power Networks (UKPN),
We are one of the few UK suppliers trusted by over 11 Distribution Network Operators (DNOs) and Independent Distribution Network Operators (IDNOs) to deliver compliant, high-security door solutions for critical infrastructure.
Sunray are proud to be one of the few UK companies that hold ISO 9001, ISO 14001 and ISO 45001
Sunray Engineering stands as a trusted supplier of UKPN doors and holds the exclusive distinction of being the only UK manufacturer accredited to provide louvre systems to UK Power Networks. Following our recent addition to the UKPN EAS 07-0000a database for security doors, we now offer comprehensive door solution coverage across UK Power Networks' extensive distribution network, from our industry-leading Excludoor security doors for primary substation and grid infrastructure applications to our exclusive louvre systems for specialised ventilation management.
This strategic expansion of our UKPN accreditation, combined with our comprehensive range of power network doors, establishes Sunray as the preferred single-source supplier for complete security solutions across England's largest electricity distribution network. Our deep understanding of UKPN's exacting specifications, reinforced by over 70 years of engineering excellence, ensures that every UK Power Network door and louvre system we manufacture meets the stringent security, durability, and compliance requirements essential for protecting critical electrical infrastructure.
The complexity of modern power network doors and louvre systems demands a supplier with intimate knowledge of UKPN's operational requirements and regulatory framework. Sunray's proven track record in delivering steel security doors, exemplified by our groundbreaking FireLock® range which achieves an exceptional 240-minute fire rating whilst maintaining full 34.2 kPa blast resistance capability, combined with our exclusive louvre systems accreditation, reflects our comprehensive ability to meet the technical specifications outlined in UKPN's equipment approval standards. This breakthrough achievement demonstrates how advanced engineering can deliver integrated protection solutions that address multiple simultaneous threats whilst maintaining operational integrity.
Our UKPN doors and exclusive louvre systems are engineered to address the specific challenges faced by electricity distribution networks, including electromagnetic compatibility, physical security threats, and environmental resilience. The rigorous assessment process that led to our inclusion in the EAS 07-0000a database validates our engineering excellence and reinforces our commitment to meeting the exacting technical specifications demanded by utility-grade security applications. Our exclusive louvre systems accreditation demonstrates UKPN's confidence in our ability to meet their most specialised ventilation and security requirements, whilst our FireLock® technology sets new benchmarks for critical infrastructure protection.
The trust placed in Sunray by UK Power Networks extends beyond product supply to encompass comprehensive project support, technical consultation, and ongoing compliance assurance. Our dedicated team works closely with UKPN project managers to ensure seamless integration of our power network doors and louvre systems into new installations and infrastructure upgrades. Our digital asset management system provides complete traceability and maintenance records throughout the product lifecycle, supporting the complex operational requirements of critical electrical infrastructure where extended protection windows and reliable performance are essential for national infrastructure resilience objectives.
As one of the select few suppliers trusted by over 11 DNOs and IDNOs across the UK, our expanded UKPN accreditation underscores our position as the compliance-first choice for network operators requiring absolute certainty in their security infrastructure investments, delivering proven solutions that exceed industry expectations whilst maintaining operational efficiency.
Sunray Engineering achieves strategic expansion of UKPN accreditation, adding security doors to complement exclusive louvre systems provision for comprehensive critical infrastructure protection
Sunray Engineering's FireLock® steel door range successfully passes rigorous EN 1634-1 fire testing whilst maintaining 34.2 kPa blast resistance, setting new benchmarks for critical infrastructure protection in utility and power generation facilities.
This article explores why proper supplier accreditation for UKPN, DNO and IDNO door solutions is non-negotiable, what risks arise when working with non-accredited suppliers, and how to verify that your chosen supplier genuinely meets the exacting standards required.
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