Source: https://tendernation.io/opportunities/01a13cae-3522-701b-8d35-97f931f53778/the-pirbright-institute-brooksby-building-sil-1-hvac-shutdown-system-from-over closed GB open procedure Suitable for SMEs # The Pirbright Institute Brooksby Building - SIL 1 HVAC Shutdown System from Overpressure and Underpressure Hazard Scenarios [The Pirbright Institute](https://tendernation.io/buyers/the-pirbright-institute) Estimated value £80,000 to £100,000 Published 15 Jun 2023 Deadline Closed 1 Aug 2023 ## Who can bid - Buyer says suitable for SMEs The buyer ticked “suitable for SMEs” on the notice. Anyone can still bid. - Small contract value Valued under £135,018 including VAT, the lowest Procurement Act threshold for goods and services. - Open procedure Anyone can submit a full tender; there is no shortlisting stage. [More contracts for small businesses and VCSEs](https://tendernation.io/opportunities/for-small-businesses) ## About this tender Following a Layers of Protection Analysis (LOPA), The Pirbright Institute requires the design and construction of a safety system that detects overpressure and underpressure of various areas and rooms in the Brooksby facility. The system subsequently responds by shutting down the ventilation system by turning off supply and extract fans. As per Functional Safety standards IEC 61508 and IEC 61511, Pirbright requires this system to be reliable to Safety Integrity Level (SIL) 1. Safety Requirement System (SRS) attached at the back of this document for more detail. Pirbright expects that the designer will have good awareness of the above-mentioned functional safety standards, and to be able to carry out their activities in adherence to the functional safety lifecycle phases as per IEC 61511. A non-exhaustive list of typical deliverables for such a project is as follows: • Data sheets for all sensing elements (e.g., level switch), logic solvers and all final elements (e.g., valves) • Bill of Materials (BoM) for all materials and accessories to be purchased • Quotations for all required materials • Functional logic diagrams (if required) • I/O lists • Functional Design Specifications (FDS) • Loop diagrams • Instrument wiring diagrams • Electrical wiring diagrams • Control panel layout and drawings • Safety Integrity Level (SIL) Verification report • SIL certifications for all relevant hardware (if available) • Factory Acceptance Test (FAT) procedures • Site Acceptance Test (SAT) procedures • Safety Instrumented System (SIS) installation and commissioning plan • SIS validation plan • Safety manuals • Proof test procedure • Spare parts list • Assets' register ready for upload to Pirbright Computerised Maintenance Management System (CMMS). Read full description ## CPV classification Ventilation installation work Source Contracts Finder (UK) [View official notice](https://www.contractsfinder.service.gov.uk/notice/1843cb24-4ea2-4238-9f05-bff3140efd5d) Never miss a tender like this again Get AI summaries, deadline alerts and a bid pipeline for tenders matched to your business. Free to start. 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