Tank air breather SFW-AF series

for airthreadeddouble

Product
SFW-AF breather caps — technopolymer vent caps with high-filtration element, double valve (overpressure and suction) and splash guard. Original ELESA design.

Main specifications

• Cover: Polyamide-based (PA) technopolymer, black RAL 9005, matte finish, laser-engraved graphic symbols.
• Threaded fitting: Polyamide-based (PA) technopolymer, with splash guard and hexagon nut, black, semi-matte finish.
• Packing ring: NBR synthetic rubber flat washer.
• Overpressure valve: Technopolymer with NBR O-ring; stainless steel spring set ≈ 0.350 bar.
• Suction valve: NBR elastomer with stainless steel spring set ≈ 0.030 bar.
• Air filter: Polyester, 3 µm filtration (efficiency > 98%).
• Maximum continuous working temperature: 100°C.

Features / Benefits

• Maintains an air pocket under pressure above the oil level to prevent tank-wall deformation (registered design).
• Reduces intake of unfiltered air, keeping oil and filter cleaner.
• Improves suction pump performance under working conditions, reducing cavitation.
• Prevents fluid loss when the system is part of a mobile unit.
• Reduces fluid foaming.
• Internal geometry limits fluid leakage to the outside.
• Hexagon on the threaded fitting allows higher tightening torque for better gasket compression.

Available executions (selection)
Code | Description | D | L | Thread (d1) | d2 | d3 | h | h1 | s | Weight (g)
52940-C9 | SFW-AF.85-M30x1.5+FC3-350MB-C9 | 85 | 73 | M30x1.5 | 23 | 38 | 16 | 30.5 | 28 | 136
52942-C9 | SFW-AF.85-M42x2+FC3-350MB-C9 | 85 | 76 | M42x2 | 33 | 50 | 16.5 | 34 | 36 | 145
52944-C9 | SFW-AF.85-G3/4+FC3-350MB-C9 | 85 | 73 | G 3/4 | 20.5 | 35 | 16 | 30.5 | 28 | 135
52946-C9 | SFW-AF.85-G1+FC3-350MB-C9 | 85 | 73 | G 1 | 25 | 40 | 16 | 30.5 | 28 | 138
952944-C9 | SFW-AF.85-3/4 NPT+FC3-350MB-C9 | 85 | 73 | 3/4 NPT | 20.5 | 36 | 16.5 | 30.5 | 28 | 135
952946-C9 | SFW-AF.85-1 NPT+FC3-350MB-C9 | 85 | 77 | 1 NPT | 27 | 41 | 19 | 34.5 | 34 | 138
952948-C9 | SFW-AF.85-1.1/16-12 SAE+FC3-350MB-C9 | 85 | 73 | 1.1/16-12 UNF | 20.5 | 35 | 16 | 30.5 | 28 | 134

Other executions (on request)

• Black cover without graphic symbol.
• Orange cover.
• Orange cover without graphic symbol.
• Yellow cover.
• Yellow cover without graphic symbol.

Technical specifications

• Model: SFW-AF (registered design).
• Cover and threaded fitting material: Polyamide-based (PA) technopolymer.
• Filter media: Polyester, 3 µm (efficiency > 98%).
• Valves: Overpressure — technopolymer + NBR O-ring; Suction — NBR elastomer.
• Spring settings: Overpressure ≈ 0.350 bar; Suction ≈ 0.030 bar.
• Seal: NBR flat washer.
• Maximum continuous working temperature: 100°C.
• Available thread options: metric, BSP/G, NPT, SAE.