SP-FV01 FLOAT VALVE
Stainless steel float valve for automatic water level control in troughs and tanks. Float-driven piston opens on low water, shuts off at the set level — no sensors or controllers needed. Sizes ½″ to 4″, rated to 200°C.
Quick SpecsSS304 · ½″–4″ · 0–200°C · CE · ISO9001 · ANSI / JIS / GB / DIN
SP-FV01 is a high-performance, mechanical piston-actuated valve engineered to eliminate the risks of overflow and system downtime. While standard valves succumb to oxidation and mechanical fatigue, the SP-FV01 utilizes a high-grade SS304 stainless steel architecture to ensure structural integrity in saline, acidic, or high-purity water environments.
Working Principle
A hollow SS304 float sits on the water surface. As the level drops, the float descends and opens the internal piston seat, allowing water in. As it rises to the preset height, the piston closes instantly — no sensors or manual control needed.
Materials
Body, piston, stem, cap, and float ball are SS304. Sealing is SI/FKM; gasket is NBR. No toxic additives — safe for potable water, livestock, and food-adjacent applications.
Compatible Media
- Water (potable and process)
- Light oils
- General industrial liquids
- Max 100°C with SI/Max 200°C with FKM
Certifications
- CE certified
- ISO9001 certified
- Manufactured to ANSI, JIS, GB, DIN standards
Packaging & Shipping
Individually bagged → inner box → export carton → plywood crate
Export via Ningbo or Shanghai · Lead time: in stock or 15–25 days (non-stock)
General
| Size Range | ½″ to 4″ (DN15–DN100) |
|---|---|
| Temperature | 0 to 100°C (SI) / 200°C (FKM) |
| Body Material | CF8 (SS304) |
| Sealing | VMQ/FMK |
| Gasket | NBR |
| Connection | Threaded BSP / NPT |
| Media | Water · Oil · Liquid |
| Design Standards | QB/T1199-1991 · BS 1212 |
| Wall Thickness | ASME B16.34 |
| Screw Thread | ASME B1.20.1 · BS21 · DIN 2999/259 · ISO 228/1 · JIS B 02023 · ISO 228/1 |
| Testing | MSS SP-110 · ISO 7/1 |
| Certifications | CE · ISO9001 |
| Capacity | 10,000 pcs/month |
Dimensions (mm)
| Size | L0 | L1 | L2 | L3 | L4 | L5 | d | D | S |
|---|---|---|---|---|---|---|---|---|---|
| ½″ | 14 | 21 | 30 | 24 | 70 | 275 | 8 | 10 | 110mm |
| ¾″ | 15 | 22 | 31.5 | 24 | 70 | 275 | 10 | 12 | 110mm |
| 1″ | 18 | 28 | 41 | 29 | 90 | 350 | 15 | 16 | 135mm |
| 1¼″ | 20 | 31 | 44 | 29 | 94 | 370 | 15 | 16 | 150mm |
| 1½″ | 21 | 32 | 49 | 38 | 115 | 480 | 22 | 24.5 | 225mm |
| 2″ | 24 | 36 | 57 | 40 | 130 | 520 | 27 | 28.5 | 250mm |
| 2½″ | 27 | 40 | 82 | 55 | 175 | 600 | 37 | 47 | 320mm |
| 3″ | 34 | 48 | 96 | 57 | 200 | 860 | 46 | 47 | 380mm |
| 4″ | 40 | 55 | 112 | 62 | 220 | 880 | 56 | 61 | 380mm |
Component Materials
| # | Part | Material |
|---|---|---|
| 1 | Body | SS304 |
| 2 | Lock Nut | SS304 |
| 3 | Gasket | NBR |
| 4 | Sealing | SI, FKM |
| 5 | Piston | SS304 |
| 6 | Stem | SS304 |
| 7 | Gasket | NBR |
| 8 | Cap | SS304 |
| 9 | Nut | SS304 |
| 10 | Float Ball | SS304 |
Typical Applications
- Agricultural irrigation reservoirs and field troughs
- Livestock and poultry drinking systems
- Cooling tower basins and condensate return tanks
- Industrial process water and bulk storage tanks
- Construction site and temporary water supply
- Municipal water treatment and wastewater infrastructure
Compatible Media
- Water — potable, process, and wastewater
- Light oils and general industrial liquids
- Operating range: 0–100°C (SI) / 200°C (FKM); not suitable for steam service
- Standard construction: SS304 body, NBR gasket, SI sealing plug
- FKM sealing available for oil service or wider chemical compatibility
- Not recommended for strong acids, concentrated alkalis, hydrocarbon solvents, or high-chloride environments
How It Works
ON-STATE — Low Water Level
- Float ball descends with the dropping water level
- Connecting rod pulls the piston outward
- Valve opens and water flows in
How It Works
OFF-STATE — High Water Level
- Float ball rises with the water level
- Connecting rod lifts and pushes the piston pad into the seat
- Valve closes and water flow stops
Features
- Durable SS304 construction — no regular maintenance required, reducing long-term replacement and repair costs
- High sensitivity mechanism stops and starts flow quickly, minimising water waste
- Float-controlled level management automatically adjusts inflow and outflow, preventing overflow
- No toxic or harmful substances in any wetted component — safe for potable water and environmentally compliant
- Suitable for construction, power pipelines, agricultural irrigation, industrial sewage, and more
Design Standards
- Corrosion-Resistant Throughout — Every component is SS304 stainless — excellent anti-oxidation performance, no rust in humid or wet environments
- High-Hardness Construction — Twice the hardness of copper, ten times that of aluminum; resistant to deformation under mechanical stress
- 6-Point Welded Float Ball — Six weld joints per ball, more than standard, reducing detachment risk and extending service life
- Anti-Crack Notch Stem — Machined notch relieves stress under load, preventing stem cracking from excessive force
- 60-Shore Silicone Seal — Maintains elasticity over time; resistant to ozone, weathering, temperature extremes, oil, acid, and alkali
- Full SS304 Hardware — Body, stem, ball, nut, and screw all stainless — no mixed metals, no weak points
How to Install
- Select the correct size (½″ to 4″) to match your tank port — BSP and NPT threads are both compatible
- Insert the valve body through the tank wall from the inside, sliding the gasket and lock nut onto the threaded end before pushing through
- Hand-tighten the lock nut from the outside to clamp the gasket firmly against the tank wall — no thread sealant or tools required
- Connect the inlet water supply line to the threaded body inlet
- Attach the float arm (stem + ball) by inserting through the joint and securing with the screw — refer to the assembly diagram for part positions
- Bend or reposition the float arm to set your desired cutoff water level: arm angled higher = higher fill level, lower = lower fill level
- Turn on the water supply and verify the valve closes completely when the float reaches the set level; check the gasket seal for leaks
- No external sensors, controllers, or power supply required — the valve operates fully automatically
