Description
The Armstrong 816975-000 is a high-precision mechanical pump seal engineered to deliver a reliable, leak-proof barrier in commercial HVAC and hydronic systems. As the direct OEM replacement and official cross-reference for legacy part number 116975-000, this 1.25-inch seal installs without field modifications — ensuring an exact factory fit every time.
Built to withstand the high-pressure demands of Armstrong Series 4030 and Series 4270 pumps, this seal resists chemical wear and thermal fluctuations common in hydronic heating and cooling applications. Incorporating it into your routine maintenance schedule protects internal motor components from moisture damage and prevents costly fluid loss before it starts.
Key Benefits
- Direct OEM Match: Exact 1.25″ fitment engineered to Armstrong Fluid Technology factory tolerances
- Leak Prevention: Maintains a pressurized, airtight seal within the pump housing to eliminate unplanned downtime
- Broad Compatibility: Official modern replacement for legacy part number 116975-000
- Industrial-Grade Construction: Resistant to chemical degradation and thermal cycling in demanding hydronic environments
- Motor Protection: Shields internal components from moisture ingress and premature shaft wear
Common Questions
Is the 816975-000 compatible with older Armstrong pumps?
Yes. This part number is the official modern replacement and cross-reference for the 116975-000 seal used across various legacy Armstrong Series pump models.
Why choose a genuine OEM seal over an aftermarket alternative?
Genuine OEM seals are manufactured to the exact material composition and spring tension specifications required by the pump motor. This precision reduces the risk of premature shaft wear and ensures long-term reliability that aftermarket parts cannot guarantee.
Is this seal suitable for high-temperature applications?
The 816975-000 is designed for standard HVAC and fluid handling temperature ranges. Always verify your system’s operating fluid temperature against the pump’s technical data sheet before installation.
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