7125

Apollo Service Propulsion System Ball Valve with Seals

Currency:USD Category:Collectibles / Autographs Start Price:NA Estimated At:500.00 - 700.00 USD
Apollo Service Propulsion System Ball Valve with Seals

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Auction Date:2022 Oct 20 @ 18:00 (UTC-05:00 : EST/CDT)
Location:15th Floor WeWork, Boston, Massachusetts, 02108, United States
ALS - Autograph Letter Signed
ANS - Autograph Note Signed
AQS - Autograph Quotation Signed
AMQS - Autograph Musical Quotation Signed
DS - Document Signed
FDC - First Day Cover
Inscribed - “Personalized”
ISP - Inscribed Signed Photograph
LS - Letter Signed
SP - Signed Photograph
TLS - Typed Letter Signed
Specially-produced stainless steel ball designed for use in an oxidizer flow ball valve in the Apollo Service Propulsion System (SPS) engine made by Aerojet General Corp., measuring approximately 2.5è x 3.25è, marked on the side: "P/N 703615-13, J, S/N 0001318." The SPS engine was housed in the Service Module. This is one of eight balls used in the engine's ball valve that controlled fuel and oxidizer flow to the engine's injector. The oxidizer flow was slightly higher in volume than that of the fuel, matching the overall fuel/oxidizer mix in the combustion chamber: thus, the opening in the oxidizer balls was about 2è while that of the fuel balls was slightly smaller, about 1.75è. Includes three ball valve seals/spacers as used within the system, all sealed in their original cleaning bags. In overall fine condition. Accompanied by a diagram of the system, showing the banks of eight ball valves (four on the oxidizer side, and four on the fuel side).