# LBNF Liquid Argon LAr Circulation Equipment

Canonical: https://abierto.us/opportunities/lbnf372669jd

- Solicitation number: LBNF-372669-JD
- Notice type: Solicitation
- Status: Closed. Deadline was January 30, 2026 at 6:00 PM EST
- Department: Department of Energy
- Contracting office: Fermilab - DOE Contractor (899034)
- NAICS: 3332 Industrial Machinery Manufacturing
- Product or service code: 3695 Miscellaneous Special Industry Machinery
- Place of performance: Lead, South Dakota
- County: Lawrence County (FIPS 46081). https://abierto.us/counties/lawrence-county-sd-46081
- City: Lead. https://abierto.us/cities/lead-sd-4636220
- First posted: November 5, 2025
- Last posted: January 22, 2026
- SAM.gov: https://sam.gov/workspace/contract/opp/87f5daaa798b4d958f916286d310edfe/view

## Description

A brief summary of the scope is provided below. For complete details please download the Statement of Work attached to this notice. The LAr Circulation System VD and HD Equipment is responsible for transferring liquid argon coming from the Cryostat VD and Cryostat HD to the low-pressure suction side of the main LAr Circulation Pump (not part of this scope).

It is also responsible for transferring liquid argon downstream of the main LAr Circulation Pump (not part of this scope) through the system resistance (friction and internal losses in valves, piping, etc.) to the LAr Purification system. The selected vendor will engineer and manufacture the vacuum jacketed pump valve box (part of the scope) that will house the pump, the MLI insulated upstream and downstream piping, isolation valves, and instrumentation required for this operation laid out above.

The cryogenic equipment in the Detector Caverns will need to be properly protected and accessible with the use of platforms, ladders, support beams and railings (all part of this scope).

Scope Overview of the Supply Structure The LAr Circulation System VD and HD acquisition is broken down into the equipment, valves and instrumentation that are detailed in the SOW • Vacuum Jacketed Pump Valve Box • MLI insulated upstream and downstream piping of the main LAr Circulation Pumps (Pumps are not part of Supply) • Instrumentation • Isolation Valves • Pressure Safety Valves • Cryogenic Equipment Protection (Platforms, Ladders and Supports

## Publications

- November 5, 2025: Solicitation, due December 4, 2025 at 6:00 PM EST. Notice 4505dec3e1a64de2a951d22069837069. https://sam.gov/workspace/contract/opp/4505dec3e1a64de2a951d22069837069/view
- November 26, 2025: Solicitation, due January 5, 2026 at 6:00 PM EST. Notice c53d1e040c394af283d57f079a645249. https://sam.gov/workspace/contract/opp/c53d1e040c394af283d57f079a645249/view
- December 31, 2025: Solicitation, due January 23, 2026 at 6:00 PM EST. Notice 4d5a3c135fb1462d8e67731e57894a57. https://sam.gov/workspace/contract/opp/4d5a3c135fb1462d8e67731e57894a57/view
- January 22, 2026: Solicitation, due January 30, 2026 at 6:00 PM EST. Notice 87f5daaa798b4d958f916286d310edfe. https://sam.gov/workspace/contract/opp/87f5daaa798b4d958f916286d310edfe/view

## Points of contact

- Jeremy Duncan, jeremyd@fnal.gov, 8653000443

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Source: SAM.gov Contract Opportunities bulk extract. Confirm deadlines on SAM.gov before responding. Cite https://abierto.us/opportunities/lbnf372669jd.