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Cryogenic Liquid Operational Seal Enhanced Rotary Union

Award Information

Department of Defense
Award ID:
Program Year/Program:
2012 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Physical Optics Corporation
Electro-Optics Systems Division 1845 West 205th Street Torrance, CA 90501-1510
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Woman-Owned: Yes
Minority-Owned: No
HUBZone-Owned: No
Phase 2
Fiscal Year: 2012
Title: Cryogenic Liquid Operational Seal Enhanced Rotary Union
Agency: DOD
Contract: N00024-12-C-4105
Award Amount: $299,991.00


In Phase I Physical Optics Corporation (POC) has developed and demonstrated the feasibility of a Cryogenic Liquid Operational Seal Enhanced Rotary (CLOSER) union system to address the Navy"s need for a robust coolant gas rotary union design. The CLOSER union system has been designed to provide flow capability (up to 10 g/s), rotary speed capability (up to 3600 rpm), high operational coolant pressure (300 psig maximum), durability, long life (>12,000 hr between overhauls), and high reliability (>3,000 hr MTBF) required by air-cooled naval power systems. CLOSER is designed to operate with no coolant leakage and eliminates the need to replenish lubricants and replace contact seals, which are otherwise subject to friction-based wear and tear, by utilizing a passively temperature-controlled array of frictionless ferrofluidic seals. The goal of the Phase II effort is to manufacture a CLOSER union prototype that successfully demonstrates the required capabilities necessary for integration, provides significant performance and cost benefits as compared to current systems, and exhibits effectiveness and suitability for PMS320. This system will be validated against NAVSEA requirements for cryogenic application, conformance to MIL-S-901D (shock and vibration) testing, and scalability to support high-temperature superconducting (HTS) generators with power output from 100 kW to 40 MW.

Principal Investigator:

Kang Lee
Principal Scientist
(310) 320-3088

Business Contact:

Gordon Drew
Chief Financial Officer
(310) 320-3088
Small Business Information at Submission:

Physical Optics Corporation
Photonic Systems Division 1845 W. 205th Street Torrance, CA -

EIN/Tax ID: 330118051
Number of Employees:
Woman-Owned: Yes
Minority-Owned: No
HUBZone-Owned: No