# SAM #80NSSC27948882Q

NASA sole-source requirement for an 8-inch KTM 3-way ball valve assembly

**Buyer:** NASA Shared Services Center
**Posted:** November 09, 2026
**Respond By:** November 12, 2026
**Identifier:** 80NSSC27948882Q
**NAICS:** 333995, 332911

NASA needs a direct-replacement valve assembly for the 20 Mach 6 tunnel at Langley Research Center.
- **Opportunity:** NASA/NSSC is seeking one 8-inch, 3-way L-port ball valve assembly for the HP air leg of the tunnel.
- **Sole-source basis:** The notice identifies Robert E. Mason & Associates, Inc. as the sole provider. NASA says alternatives would require facility redesign and could cause 4–6 months of downtime.
- **Required configuration:** KTM NB1HF valve (part number NB1HF-0200R3A200A2-SES06U8MCG0AIB), Bettis G4016-SR4 pneumatic actuator, stainless-steel mounting bracket, and Topworx DXP-M211NES switchbox.
- **Key specifications:** 8-inch, ASME 300 RF flanged; 316 stainless-steel body and ball; Duplex 329 stem; Stellite seat; L-port; actuator sized for 90 psig supply. The switchbox includes two GO switches and a green/red position indicator.
- **Delivery:** Required by July 2, 2027. Contract start date and duration are not stated.
- **Response:** Quotes are not requested or evaluated. Interested vendors must submit a capability statement referencing the notice ID.

### Description

<p>**THIS IS A SOLE SOURCE REQUIREMENT** For&nbsp;3-Way Ball Valve with Pneumatic Actuator</p>

[View original listing](https://sam.gov/opp/16ebb6648c2d4acea71f5d7bbef8e6ac/view)