Material

• Cover: steel sheet, with chrome plating superficial treatment.
• Flange: zinc-plated steel sheet.
• Threaded connector: zinc-plated steel.

Packing ring

NBR synthetic rubber.

Overpressure valve (only for SMW.)

Technopolymer with NBR synthetic rubber O-ring and stainless steel spring.

Set at around 0.350 bar (0.700 bar on request).

Suction valve (only for SMW.)

Technopolymer sealing disk with NBR synthetic rubber O-ring and stainless steel spring.

Set at around 0.030 bar.

Ring-shaped air filter

Tech-foam 40µ.

Filter setting spring (only for SMN.)

Zinc-plated steel.

Standard executions

• SMN.: breather cap.
• SMW.: double-valve breather cap.

Maximum continuous working temperature

100°C.