Material

Cover: polyamide based (PA) technopolymer, black colour, matte finish. Graphic symbol "double valve".

Threaded connector: acetal based technopolymer (POM), black colour, matte finish.

Packing ring

NBR synthetic rubber.

Overpressure valve

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

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

Suction valve

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" polyurethane foam mesh (polyester base), air filtration 40 µ.

Fold-away key

CWL in acetal resin-based (POM) technopolymer, red colour, with stainless steel anti-intrusion-profile insert.

The key avoids the need for a torque limiter and allows the application of the manual screwing and unscrewing torque.

Also available with accessories sold separately.

Square key

CWQ in zinc-plated steel, the key allows the application of very high torques which make it impossible to unscrew by hand due to the intervention of the torque limiter.

Also available with accessories sold separately.

Maximum continuous working temperature

100°C.

"Vandal-proof" safety device (ELESA patent)

The vandal-proof device prevents unscrewing of the cap by unauthorised personnel as it is equipped with a “controlled-torque” torque limiter.

Standard executions

• SFW-VP: with CWL fold-away key.

• SFW-VP-CH: with CWQ square key.