UNSPSC 31411800: Diaphragm seals

Isolation devices used to separate pressure instruments from the process media, while allowing the instruments to sense the process pressure

UNSPSC 31411800 Diaphragm seals, a Class code, comprises specialized sealing products and repair services that state and local governments procure for infrastructure maintenance and equipment operation. Recent solicitations show state and local buyers acquiring compression seals, silicone-coated foam seals, gland seals, and related sealant materials in various sizes for bridge and transportation applications, along with authorized repair and parts support for specialized pump equipment. The issuing bodies include state departments of transportation, county purchasing offices, and city procurement departments, with mixed patterns of single-source and competitive procurement approaches.

Maine Department of Transportation, through the State of Maine Office of State Procurement Services, issued an RFQ (RFQ 17A 260427-275, due June 1, 2026) for a Master Agreement covering 76 line items of bridge joint seals and supporting materials—compression seals ranging from 1/2" to 6" width, silicone coated foam seals in multiple sizes, gland seals, and ancillary products such as lubricant adhesive and backer rod—with delivery required to nine MaineDOT locations across five regions and an initial contract term running through June 30, 2027, with four optional one-year extensions. The City of Port Orange, Florida posted a Notice of Intent to Award a Single/Sole Source Procurement (SS2620CW, due September 16, 2026) for NOV Chemineer Moyno pump repair services and parts under Florida State Statute 287.057(3)(c), with an estimated annual contract value of $500,000, seeking to verify whether authorized dealers other than Carl Eric Johnson, Inc. could supply the specified products. Recent activity is concentrated in Maine and Florida, with Maine's infrastructure maintenance focus and Florida's equipment repair and parts support representing the primary geographic areas of current procurement demand.