Overview
The Flexaseal 2242-C21 is a mechanical seal designed for industrial rotating equipment and pump applications. Built with corrosion-resistant materials including 316 stainless steel, Hastelloy C, carbon, and Viton elastomer, this seal delivers proven performance in demanding chemical processing, oil & gas, and general industrial service. The 42ABC.F.22 configuration represents a Type C unbalanced seal platform, widely recognized as a cost-effective, industry-standard solution across OEM equipment globally.
Key Features
- 316 stainless steel and Hastelloy C materials for superior corrosion resistance in harsh chemical environments
- Carbon face with Viton elastomer for broad fluid compatibility
- Type C unbalanced design—general purpose, proven reliability across diverse pump types and OEM equipment
- Automatic compensation for shaft run-out and axial movement via elastomer bellows
- Reduces sliding action and prevents fretting damage to shaft surfaces
Technical Specifications
| Part Number | 2242-C21 / 42ABC.F.22 |
| Manufacturer | Flexaseal |
| Model Designation | S16315 |
| Seal Type | Type C Mechanical Seal (Unbalanced) |
| Primary Face Material | Carbon |
| Mating Face Material | 316 Stainless Steel / Hastelloy C |
| Elastomer | Viton (FKM) |
| Spring Material | Stainless Steel |
| Bellows Type | Elastomer |
| Configuration | 42ABC.F.22 (Single Spring) |
| Condition | New in Box |
Typical Applications
- Centrifugal pump sealing in petroleum refining and petrochemical facilities
- Chemical processing equipment where corrosive fluid compatibility is critical
- Water treatment and industrial circulation pumps
- OEM pump replacement and retrofit sealing
- General industrial rotating equipment requiring carbon-face seal technology
Compatibility & Replacements
Compatible With
- Centrifugal and rotary pumps (API 682 compliant applications)
- Equipment originally equipped with Type C Flexaseal seals
- Pumps requiring carbon primary face and stainless/Hastelloy mating surfaces
- Systems using Viton-compatible fluids (mineral oils, glycols, many hydrocarbons)
Replaces / Drop-In Replacement For
- Flexaseal S16315 original seals
- Equivalent Type C mechanical seals with matching shaft and cavity dimensions
- John Crane Type 21 and similar third-party Type C seal configurations (verify cavity/shaft fit)
Works With
- Mineral oil and synthetic lubricants
- Water-based cooling systems
- Glycol and polyol fluids
- Most petroleum and chemical process fluids compatible with Viton elastomers
- Standard bearing/seal chamber designs for Type C unbalanced seals
