JW Winco

Our customers in the USA are managed by JW Winco. Please, use the website of JW Winco: jwwinco.com

GN 774 Breather Caps Plastic, with Filter, with Double Valve


GN 774 Breather Caps with Filter and Double Valve Type: A - Without dipstick
ELESA original design

code: SFW.
Type: A - Without dipstick
GN 774 Breather Caps with Filter and Double Valve Type: A - Without dipstick GN 774 Breather Caps with Filter and Double Valve Type: B - With dipstick

Product description


Function and operational criteria of breather plugs GN 774 see function description.

Breather caps are fitted either with a threaded neck or with a bayonet connection and they can also be combined with a filler strainer GN 664 or GN 664.1.

The bayonet version is fitted with a chain to avoid losing it.

MAX-MIN markings can easily be added to the flats of a dipstick (see GN 109).


Plastic (Polyamide PA)

  • Temperature resistant up to 100 °C
  • Upper part (cap)
    Orange, RAL 2004OROR
  • Lower part (threaded part / bayonet)
    Black, matte finish

Rubber NBR (Perbunan®)

Air filter PU-foam (Polyurethane)

  • Filtration 40 µm
  • Temperature resistant up to 100 °C

Steel, phosphated


On request

Fluid level markings / special lengths
see GN 109

Technical drawing

Hide technical drawing
GN 774 Breather Caps with Filter and Double Valve sketch

Article options / Table


AWithout dipstick
BWith dipstick
Show / Hide columns
Type A

Type B

Opening pressure
in mbar
57G 3/4--350700*35165613648---
70G 3/4G 3/4-350700*35166815663--188
70G 1 1/4G 1 1/4-350700*-256817-59--195
70G 2--350700*-256817-59---
70--BA 39350700*-2568---1456195
* not available from stock, requires a minimum order quantity

Build & Price

Open 3D configurator
Outside diameter d1
Thread d2
Bayonet d2
Opening pressure


Sketch Function GN 774

Breather caps GN 774 with double valve are normally used if the oil container is under pressure and if outside air has to flow back in to compensate for the vacuum caused by falling oil level.

This is achieved by combining two valves (non-return / bypass valve). The inlet valve opens at a vacuum of 30 mbar or greater. The second valves opens at an overpressure > 350 / 700 mbar.

The air filter prevents the oil from being polluted from the outside (dust). The filter is made of PU foam with a filtration of 40 µm.

The overpressure inside the container ensures that the air volume flowing in or escaping owing to fluctuations of the oil level is kept to a minimum. This reduces filter fouling and substantially increases the useful filter life, especially in a dusty environment.

Also, a container under pressure has a positive effect on the function of the pump and prevents foaming.

The valve seal ensures that no oil can spill to the outside, neither by excessive agitation in the tank nor during transport.

Skizze Diagramm GN 774

Pressure curve Δp [mbar] in the container as
factor of the air flow rate [l/min.] at a valve
opening pressure of 350 or 700 mbar.

GN 109 Level markings / Special lengths (special order)

GN 109

Level markings and special lengths GN 109 for oil dipsticks are available for the standards shown above. The dipstick is shortened to the length l1 and the marking notches are milled in at l2 or l3 with the effect that they are easily visible. The maximum length l1 is given in the appropriate standard. The length specifications l1 to l3 refer to the contact surface without seal, with a tolerance of ±1 mm to be taken into account. For critical applications and depending on standard, the seal must be taken into consideration with a thickness of as much as 2 mm.
If required, more than 2 notches may be cut which are then specified by the appropriate details on the position
(l4 ... lx). Also, texts such as MAX / MIN may be laser-engraved in addition to or instead of the notches by submitting the
appropriate template.

The level markings / special lengths GN 109 are to be ordered as a separate item in shopping cart step 1 under note.

How to order GN 109

Selected Part (How to order)

Total (net)
plus VAT 4,72 €
gross 29,56 €
In stock
ELESA Code: 54801
Description: SFW.57.3/4+F-350-MB
Weight: 0,067 kg
If this article is new in our product range, it may happen that details concerning weight are as yet not listed.
If you do need weight details, please contact our Sales Department!
Phone +49 7723 6507 - 0
RoHS: Yes
This article is RoHS-compliant in application of Annex III., which means it complies with EU Directive 2011/65/EU, including extension (2015/863/EU), for restricting the use of certain hazardous substances in electrical and electronic devices. The Directive regulates the use of hazardous substances in devices and components. The implementation in national law is summarily described with RoHS(Restriction of (the use of certain) hazardous substances).
Please note our order discounts.
With a total value (net) per order:
from 175,00 € -> 10 % discount
from 275,00 € -> 20 % discount
from 375,00 € -> 30 % discount

Surcharge for small volume purchases:
-> 15,00 Euro
for value of goods less than 25,00 €
-> 10,00 Euro
for value of goods from 25,00 to 50,00 €
All prices in accordance with our price list No. 55, valid from 1 September 2022, plus VAT only valid for Germany.

CAD data

Other data formats


For getting CAD data please enter you Email address. But we would be pleased, if you are fully registered.

Please enter the code you can find in the picture.

CAD Download Tutorial About CAD-Downloads
Save as favourite

Please enter the code you can find in the picture.

Do you find your product ?

Our service team is available from Monday to Friday between 7:00 AM and 5:30 PM: +49 7723 6507 - 0

To the customised elements | To the contact persons

GN 774-57-G3/4-350-AGN 774-57-G3/4-700-AGN 774-70-G3/4-350-AGN 774-70-G3/4-350-BGN 774-70-G3/4-700-AGN 774-70-G3/4-700-BGN 774-70-G11/4-350-AGN 774-70-G11/4-350-BGN 774-70-G11/4-700-AGN 774-70-G11/4-700-BGN 774-70-G2-350-AGN 774-70-G2-700-AGN 774-70-BA39-350-AGN 774-70-BA39-350-BGN 774-70-BA39-700-AGN 774-70-BA39-700-B

This could also be interesting...

Your contact

You are looking for a Ganter partner near you? Please select the country.


Our service team is available from Monday to Friday between 7:00 AM and 5:30 PM:

Request Callback
An error has occurred!
We have received your callback request and will contact you soon.