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SMN-BA SMW-BA

Breather caps or double-valve breather caps with bayonet assembly

SKU: 7984 Category:
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Technical Drawing

Product Details

Standard Elements Main dimensions Weight
Code Description D L L1 D1 D2 d1 g
156836 SMN.46-BA-F40 47 42 66 40 52 27 91
156886 SMN.80-BA-F40 81 55 80 72 83 49 370
Standard Elements Main dimensions Weight
Code Description D L L1 D1 D2 d1 g
156986 SMW.80-BA-F40-350mb 81 55 80 72 83 49 410

Additional information

Assembly

By means of six glossy zinc-plated steel screws with screwdriver slot head M5x12, supplied.

Bayonet and flange with bayonet

Zinc-plated steel sheet.

Cover

Steel sheet, with chrome plating superficial treatment.

Double-valve (execution SMW.BA)

Technopolymer with NBR synthetic rubber O-ring, stainless steel springs, fitted to the valve body by means of a bracket and 2 self-tapping zinc-plated steel screws. <BR>Assembly to the flange by means of 4 aluminium rivets. <BR>Safety valve set at around 0.350 bar (0.700 bar on request). <BR>Suction valve set at around 0.030 bar. <BR>

Features and applications

SMN.BA and SMW.BA breather caps can be used on tanks containing oil fluids. <BR>Double-valve breather caps SMW.BA with bayonet assembly creates a pressure plenum chamber right above the oil level within the limit conditions in order to avoid any reservoir deformation. <BR>Advantages: <BR>- it reduces reservoir air volume intake keeping clean fluid and filter; <BR>- it improves suction pump action under working conditions reducing cavitation phenomenon; <BR>- it prevents fluid leakage when the system is part of a mobile unit; <BR>- it reduces foam in fluid.

Filter setting spring (only for SMN.BA)

Zinc-plated steel.

Filtration basket

Zinc-plated steel, degree of filtration 800 µ.

Flange

Zinc-plated steel sheet.

Maximum continuous working temperature

100°C.

Ring-shaped air filter

Tech-foam 40 µ.

Safety chain

Brass.

Special executions on request (For sufficient quantities)

Dipstick for fluid level indication (only for SMW.BA).

Technical data

Air flow rate for the different executions of breather caps can be obtained from the diagram on the basis of the difference of air pressure inside and outside the reservoir. Tests carried out without filtration basket.

Washers

– Execution <STRONG>SMN.46-BA</STRONG>: two flat packing rings in rubber-impregnated cork and one in NBR synthetic rubber. <BR>- Execution <STRONG>SMN.80-BA SMW.80-BA</STRONG>: three flat packing rings in rubber-impregnated cork.

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