Floating valves - Buoy for floating valves - 3887 | Genebre

Genebre 3887 Float for Float Valves

The Genebre 3887 is a float constructed from polished AISI 304 stainless steel, engineered for integration with the Genebre 3886 float valve. It is not a standalone valve; it serves as the buoyancy element that transmits level variation to the valve lever. The float is selected based on process requirements and is critical for reliable mechanical level control in non-electric installations.

Available Sizes

• 3887 090: Ø90 mm, M6 connection, weight 75 g
• 3887 110: Ø110 mm, M6 connection, weight 90 g
• 3887 160: Ø160 mm, M8 connection, weight 290 g

Float-to-valve matching by size: 3/8" valve with Ø90 mm float, 1/2" with Ø110 mm, and 3/4" to 1 1/4" with Ø160 mm. Proper selection ensures sufficient closing force and operational stability.

3886/3887 System Operating Conditions

According to manufacturer datasheet: ISO 228-1 thread, full bore, silicone sealing, maximum working pressure 10 bar, maximum temperature 150°C. Ensure compatibility with process media and pressure class.

Selection Criteria

Float diameter must provide adequate closing force, considering:

• inlet pressure at the valve
• required filling flow rate
• liquid density
• lever free travel
• potential tank wall interference
• AISI 304 compatibility with media

For water with high chloride content or chemically aggressive media, AISI 304 suitability must be verified. In more corrosive environments, AISI 316 floats may be required, subject to valve and media chemical analysis.

Applications

• potable and process water tanks
• small and medium filling reservoirs
• auxiliary mechanical level control vessels
• installations without electric level sensors

FAQ

Is it compatible with any float valve?
No. Thread type, required buoyancy, and lever geometry must match the valve specification.

What is checked during maintenance?
Deformation, M6/M8 connection integrity, corrosion, deposits, and unobstructed float movement.