SFW. Pressurised breather caps with double valve, technopolymer up to 100°C


  • RoHS
  • PA
  • g10030

Description

Main specifications

Material

Polyamide based (PA) technopolymer.
  • Cover: RAL 2004 orange, semi-matte finish, with graphic symbol "valve".
  • Threaded connector: black colour, semi-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.

Flat dipstick

Flat section phosphatised steel.
On request and for sufficient quantities dipstick can be supplied in different lengths and/or complete with MAX-MIN level lines.

Standard executions

  • SFW+F: without flat dipstick.
  • SFW-BA+F: with zinc-plated steel sheet bayonet, without flat dipstick. Chrome-plated steel safety chain.
  • SFW+F+a: with flat dipstick.
  • SFW-BA+F+a: with zinc-plated steel sheet bayonet and flat dipstick. Chrome-plated steel safety chain.

Maximum continuous working temperature

100°C.

General information

Features

The use of SFW. pressurised breather caps which create a pressure plenum chamber right above the oil level within tested limit conditions, in order to avoid any reservoir deformation, offers the following advantages:
  • reduces reservoir air volume intake keeping clean oil and filter
  • improves suction pump action during working conditions reducing cavitation phenomenon
  • prevents fluid leakage when the system is part of a mobile unit
  • reduces foam in fluid.

Technical data

Air flow rate for each model can be determined from the graph calculating the difference between the pressure inside and outside the reservoir.

Working in an hydraulic circuit

Special executions

Special executions on request

  • Black cover.
  • Threaded connector also with NPT thread (National Taper pipe Thread - ANSI-ASME B1-20) for the codes marked with # in the table.
Pressurised breather caps with double valve, technopolymer up to 100°C SFW.
SFW.
Filter
Code Description d D L d2 d3 h h1 Weight
54801 SFW.57-3/4+F-350 mb G 3/4 57 48 16 35 13 6 67
54911 SFW.70-3/4+F-350 mb# G 3/4 70 63 16 35 15 6 98
54921 SFW.70-1¼+F-350 mb G1 1/4 70 59 23 - 17 - 101
54931 SFW.70-2+F-350 mb G 2 70 59 23 - 17 - 108
SFW.
Filter
Code Description D L d2 d4 h Weight
54941 SFW.70-BA+F-350 mb 70 56 30 39 14 105
SFW.
Filter
Code Description d D L d2 d3 h h1 a Weight
54913 SFW.70-3/4+F+a-350 mb# G 3/4 70 63 16 35 15 6 188 117
54923 SFW.70-1¼+F+a-350 mb G1 1/4 70 59 23 - 17 - 195 120
SFW.
Filter
Code Description D L d2 d4 h a Weight
54943 SFW.70-BA+F+a-350 mb 70 56 30 39 14 195 124