Flojet 20028-045 Valve Chamber, Viton Non-Fabric
The Flojet 20028-045 is the genuine valve chamber with plain Viton valves, carried under the factory designation "Valve Chmbr Vit N/Fab 1BP". Viton is the fluoroelastomer option, and choosing it is a decision about what the pump handles.
Viton’s territory is fuels, oils, solvents, acids and elevated temperatures — the chemistries that swell nitrile and soften it from the inside where the damage is invisible until the valve stops seating. In a pump moving anything more demanding than water and mild detergent, the elastomer is almost always the first component to fail, and fitting the right one is what determines whether a rebuild lasts years or months.
The non-fabric construction means plain elastomer rather than fabric-reinforced, giving a softer, more compliant flap that seats readily without much pressure behind it. That suits demand and lower-pressure duties where a stiffer reinforced valve would be reluctant to seal. Check the part number against the parts breakdown for your pump, inspect the valve seats for scoring while the chamber is apart, and clean or fit a suction strainer if the old valves show cuts or embedded debris.
Key Features
- Genuine Flojet (Xylem) service part — complete valve chamber
- Viton (fluoroelastomer) valves for fuels, oils, solvents, acids and higher temperatures
- Non-fabric (plain) construction — compliant and quick to seal at lower pressure
- Resists the swelling and softening that end nitrile valves in chemical service
- Factory designation: Valve Chmbr Vit N/Fab 1BP
Applications
- Flojet pumps in chemical transfer and solvent service
- Fuel and oil transfer duty
- Higher-temperature applications beyond the range of nitrile
- Demand and lower-pressure systems needing a compliant valve
- Marine, dockside and industrial pump installations
Specifications
- Brand: Flojet (Xylem)
- Manufacturer Part Number: 20028-045
- Part Type: Valve chamber
- Valve Material: Viton (fluoroelastomer), non-fabric
- Factory Designation: Valve Chmbr Vit N/Fab 1BP
- Condition: New
Frequently Asked Questions
Q: How do I know whether I need Viton rather than Buna?
By what the pump moves. Water and mild detergents are comfortable for nitrile; fuels, oils, solvents, acids and sustained heat call for a fluoroelastomer.
Q: What does a chemically attacked valve look like?
Swollen and soft, sometimes with a tacky surface, and usually distorted enough that it no longer lies flat. The damage develops from the inside, so it can look fine until it is handled.
Q: Is Viton worth fitting as an upgrade in a water system?
Rarely. For plain water it offers no practical advantage over nitrile, and nitrile is actually the more abrasion-resistant of the two.
Q: Can Viton handle steam and hot caustics?
Those are EPDM’s strengths rather than Viton’s. Viton excels with fuels, oils, solvents and acids; for hot water and caustics, the EPDM option is the better match.
Not sure this is the right part? Send us a Picture of the pump plate on your pump and the CLR Marine team will confirm the correct part before you order.
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