
Maintain the integrity of your hydronic pump assemblies with the Armstrong 975000-984, a precision-engineered 1-5/8" Type 21 seal kit. Designed for demanding HVAC environments, this kit provides an essential barrier against fluid leakage, ensuring your circulation systems continue to operate at peak efficiency without costly downtime or pressure losses.
The Type 21 mechanical seal functions by utilizing a rotating face and stationary seat that maintain constant contact, effectively sealing the shaft against fluid egress. This design is highly resistant to heat and friction, providing long-term reliability in high-cycle pumping applications common in large-scale commercial hydronic loops.
Key System Performance Baselines:
- Seal Integrity: Precision-machined surfaces to minimize weepage.
- Thermal Resilience: Engineered to withstand standard system operating temperatures.
- Durability: High-grade material composition for extended service life.
- Compatibility: Specifically calibrated for Armstrong 1-5/8" shaft requirements.
⚠️ Application Profile: Ideal for commercial HVAC circulation pumps, building water management systems, and hydronic heating/cooling loops requiring standardized mechanical seal replacement.
| Performance Parameter | Engineering Baseline Value |
|---|---|
| Manufacturer Part Number (MPN) | 975000-984 |
| Seal Type | Type 21 |
| Shaft Size | 1-5/8" |
Corporate Procurement & PO Processing
Formal Purchase Orders (POs) and tax-exempt ordering are accepted for commercial contractors and institutional facilities.
Apply for Trade Account & Terms →📋 Procurement & Shipping Notice
- LTL Freight Dispatch: Heavy commercial units ship directly via insured LTL carrier with delivery coordination included.
- Project Timelines & Submittals: Need guaranteed delivery dates, formal submittals, or tax-exempt processing?
👉 Request a Commercial Quote or contact our procurement team for direct freight scheduling.