Clemons Sales Corporation
Clearwater FS-Series
The "Best Available Technology" for Fish Protection
The "Double Safety" Factor
Every model in the Clearwater FS-Series—including both the cylindrical FSCW and shallow-water FSSW screens—is an Active System featuring continuous, water-driven hydraulic cleaning. While federal guidelines permit "Active" screens to operate at an approach velocity of 0.40 fps, our FS-Series is intentionally governed by its massive surface area to max out at the ultra-safe "Passive Limit" of 0.20 fps. This mathematically guarantees protection for the weakest swimming fry, even if cleaning were to temporarily fail.
Safely excludes sensitive species
Universally Compliant
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Mesh: Heavy-duty 12-Mesh Stainless (~0.055" opening - safely smaller than the federal 3/32" maximum limit).
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Porosity: ~40-50% Open Area.
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Quiescent Ready: Compliant for lakes & slack-tide.
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Cavitation Guard (Overdraw Protection): An engineered orifice restriction acts as a physical limiting factor, making it highly difficult to accidentally overdraw the screen and operate pumps in a way that violates biological compliance.
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Active Monitoring Ready: Pre-plumbed with dedicated sensor ports, allowing seamless integration of Differential Pressure (DP) monitors and Rotation Verification Sensors into your SCADA system to satisfy strict agency active-screen mandates.
Why Choose the FS-Series?
A "Set It and Forget It" solution that protects your infrastructure and the fishery.
Clearwater Iso-Flow Core™
Engineered to keep the flow through the wetted screen as even as possible. This completely eliminates high-velocity suction "hotspots," allowing for a perfectly even flow distribution.
Built for Compliance Sizing
We've eliminated sizing guesswork. Model numbers round down to their Fish-Safe baseline at the strictest regulatory limit (0.20 fps). Specify an FSCW 2400, and you are guaranteed 50-state compliant flow.
Zero-Power Operation
Driven entirely by water pressure from your pump's discharge. No electric motors, gearboxes, or remote solar panels are required at the intake site.
No External Moving Parts
Unlike rotary drum screens, our system has no external chains, sprockets, or seals to jam with driftwood or freeze in winter. All mechanisms are safely protected inside.
Universal Installation
Heavy-duty sealed bearings allow the screen to be mounted at any angle—vertical, horizontal, or inclined—making it perfect for uneven riverbanks or floating platforms.
50-State Compliance
Universally compliant Best Available Technology (BAT). Strictly meets rigorous anadromous salmonid criteria for NOAA/NMFS (Federal), CDFW (California), and WDFW (Washington).
Self-Protecting Insurance
By continuously blasting debris off the intake, the screen prevents pump cavitation and protects expensive impellers from abrasive wear, ensuring uninterrupted water delivery.
Active Monitoring Ready
Pre-plumbed with dedicated sensor ports, allowing seamless integration of Differential Pressure monitors into your SCADA to satisfy proof-of-cleaning mandates.
Technical Data: Cylindrical Screens
FSCW Series Specifications
For rivers, canals, and deep diversions. Featuring expanded Wetted End-Cap Area.
Compliance Math
Analyzing: FSCW 1000
1. TOTAL WETTED AREA (Atotal)
2. MAXIMUM SAFE FLOW (Q)
Calculated strictly to never exceed the ultra-safe 0.20 fps passive limit, ensuring our Double Safety Factor.
3. CAVITATION GUARD (ORIFICE RESTRICTION)
Engineered to induce severe head loss (Hf) to physically prevent pump overdraws.
Flow Ratings & Sizes
Click any row to calculate safety compliance
| Model | Flange | Orifice (Restriction) |
Size (Dia x L) |
End Cap (Area) |
Fish Safe (≤ 0.20 fps) |
|---|---|---|---|---|---|
| FSCW 200 | 3" | 3 5/8" | 12" x 9" | 0.44 ft² | 251 GPM |
| FSCW 400 | 4" | 4 5/8" | 16" x 11" | 0.92 ft² | 427 GPM |
| FSCW 500 | 6" | 5 3/8" | 16" x 15" | 0.92 ft² | 553 GPM |
| FSCW 900 | 8" | 7" | 24" x 16" | 2.41 ft² | 968 GPM |
| FSCW 1000 | 10" | 7 3/8" | 24" x 18" | 2.41 ft² | 1,062 GPM |
| FSCW 1200 | 10" | 8 1/8" | 24" x 23" | 2.41 ft² | 1,297 GPM |
| FSCW 1400 | 12" | 8 5/8" | 24" x 26" | 2.41 ft² | 1,438 GPM |
| FSCW 1600 | 12" | 9 1/4" | 26" x 28" | 2.89 ft² | 1,685 GPM |
| FSCW 1800 | 14" | 9 7/8" | 26" x 32" | 2.89 ft² | 1,888 GPM |
| FSCW 2400 | 16" | 11 1/8" | 30" x 35" | 3.98 ft² | 2,413 GPM |
| FSCW 2700 | 16" | 11 3/4" | 30" x 40" | 3.98 ft² | 2,707 GPM |
| FSCW 3300 | 18" | 13 1/8" | 36" x 40" | 5.94 ft² | 3,353 GPM |
| FSCW 4000 | 18" | 14 3/8" | 42" x 40" | 8.30 ft² | 4,035 GPM |
Technical Data: Shallow Water Screens
FSSW Series Specifications
Flat diffuser screens designed for extreme shallow depths. Now fully equipped with continuous hydraulic cleaning.
Compliance Math
Analyzing: FSSW 600
1. Wetted Area
2. MAXIMUM SAFE FLOW (Q)
Equipped with continuous active cleaning, yet sized to meet the ultra-safe 0.20 fps passive threshold.
3. CAVITATION GUARD (ORIFICE RESTRICTION)
Safeguards the fishery by restricting accidental flow overdraws.
Flow Ratings & Sizes
Click any row to calculate safety compliance
| Model | Flange | Orifice (Restriction) |
Wetted Area (Diameter) |
Fish Safe (≤ 0.20 fps) |
|---|---|---|---|---|
| FSSW 100 | 4" | 3 1/8" | 20" | 196 GPM |
| FSSW 200 | 4" | 3 3/4" | 24" | 282 GPM |
| FSSW 400 | 6" | 4 3/4" | 30" | 441 GPM |
| FSSW 600 | 6" | 5 3/4" | 36" | 635 GPM |
| FSSW 800 | 8" | 6 5/8" | 42" | 864 GPM |