Commercial Pool and Spa Supplies
8" FVSP Single Arm Float Valve With Pivot - Open Pipe
8" FVSP Single Arm Float Valve With Pivot - Open Pipe
SKU:8FVSP-OP
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The 8" FVSP Single Arm Float Valve With Pivot – Open Pipe (catalog part number 8FVSP-OP) is a heavy-duty, large-bore commercial mechanical water-level control valve engineered for high-volume aquatic surge tanks, collector pits, balance tanks, and open-channel gravity return systems. Constructed with a corrosion-proof Schedule 80 PVC body and an articulated single-arm pivot linkage, it mounts directly onto an open-ended 8-inch gravity return pipe stub inside a surge pit to automatically modulate or shut off massive perimeter gutter and skimmer return flows as water levels rise—preventing surge tank overflow while maintaining positive flooded suction head for the main circulation pumps.
| Parameter | Specification |
|---|---|
| Part / Model Reference | 8FVSP-OP (8" Float Valve, Single-Arm, PVC Body with Pivot Linkage, Open-Pipe Mount) |
| Nominal Pipe Size | 8.0 in (200 mm / DN200) |
| Inlet Connection Type | Open-Pipe Mount: Female Slip Socket (Schedule 40/80 IPS, 8.625" ID socket) or Slide-On Locking Hub for bare 8.0" nominal (8.625" actual OD) open pipe end |
| Discharge Configuration | Unobstructed Open-Discharge / Free-Fall Port (zero downstream backpressure) |
| Actuation & Pivot Mechanism | Articulated Single-Arm Lever with Clevis Pivot Hinge (direct proportional buoyancy actuation; no electricity or compressed air required) |
| Valve Body & Housing Material | Heavy-duty machined Schedule 80 PVC (non-corrosive, UV- and chlorine-resistant) |
| Pivot Arm, Hinge & Fasteners | Heavy-gauge 316 Marine-Grade Stainless Steel arm, machined pivot clevis, hinge pins, and locknuts (eliminates galvanic corrosion and chlorine stress-cracking) |
| Float Ball / Buoyancy Element | Seamless heavy-wall Polyethylene (HDPE), Polypropylene, or 316 Stainless Steel oversized spherical/cylindrical float (typically 14" to 16" diameter to generate sufficient closing torque on an 8" bore) |
| Seat & Disc Seal Material | Replaceable thick-wall EPDM or Neoprene elastomer disc / flapper seal for drip-tight shutoff |
| Recommended Gravity Flow Capacity | Approx. 750 to 1,500 US gpm (170.3 to 340.7 m³/h) at standard gravity head (1 to 3 ft water column) |
| Maximum Operating Pressure | 10 to 15 psi (0.69 to 1.03 bar) — engineered strictly for low-head gravity gutter and collector lines |
| Operating Temperature Range | 32°F to 120°F (0°C to 49°C) |
| Level Adjustment Range | Indexed pivot clevis and adjustable float rod pitch allow field calibration of shutoff water elevation (+/- 4 to 8 in) |
| Compliance / Standards | NSF/ANSI Standard 50 compatible materials; meets Model Aquatic Health Code (MAHC) surge tank overflow protection guidelines |
Hydraulic & Mechanical Operating Details
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Nomenclature Breakdown:
8= 8-inch nominal bore;FV= Float Valve;S= Single-Arm lever mechanism;P= PVC body construction;OP= Open-Pipe slip/clamp mount (as opposed to-FLfor ANSI Class 150 flanged connections). -
Articulated Pivot Geometry: The heavy-gauge 316 stainless steel pivot hinge translates the vertical buoyancy lift of the 14"–16" float into smooth, linear angular closure of the 8" disc against the machined PVC seat, preventing binding across the 50.3 sq. in. orifice even during rapid surge tank fluctuations.
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Open-Pipe Installation: Designed specifically for installations where the 8" gravity return pipe terminates cleanly inside the surge tank wall without a bolted flange. The female PVC hub slips directly over the 8" pipe stub and is secured via PVC solvent cement or stainless steel mechanical locking screws.
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Shipping Weight: Approx. 32 to 44 lbs (14.5 to 20.0 kg) complete with 8" PVC valve body, heavy-duty 316 SS single pivot arm and clevis assembly, adjustable linkage hardware, and oversized float ball.
