GN 552 Breather caps Plastic


GN 552 Breather caps, plastic Type: A - without dipstick
ELESA original design
code: SFN. / SFP. / SFP+a
Type: A - without dipstick
GN 552 Breather caps, plastic Type: A - without dipstick GN 552 Breather caps, plastic Type: B - with dipstick

Product description


Function and operational criteria of breather caps GN 552 see description of function.

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

* Type with Dipstick (Type B)
is only available for marks 0, 1 and 2 as follows:
Size 31- all threads
Size 42- G ¾ and 1 only
Size 57 - G 1 1/4 and G 1 1/2 only


temperature resistant up to 100 °C

Upper part (cap)
orange, RAL 2004

Lower part (threaded part)

Sealing ring rubber NBR (Perbunan)

Air filter wire mesh
  • zinc plated
  • Filtration 50 to 60 µm

Air filter PU-foam (Polyurethane)
  • Filtration 40 µm
  • temperature resistant up to 100 °C

Dipstick Steel
  • phosphated
  • Level markings /
    Special lengths GN 109

Technical drawing

Hide technical drawing
GN 552 Breather caps, plastic sketch

Article options / Table


Awithout dipstick
Bwith dipstick


0with splash guards, with wire mesh filter
1with splash guards, no filter
2with splash guards, with PU filter
3no splash guards, no filter
4no splash guards, with PU filter
Show / Hide columns
31G 1/4--8309,529,5188
31G 3/8M 16 x 1,5M 18 x 1,510309,529,5188
31G 1/2M 20 x 1,5M 22 x 1,512309,529,5188
42G 3/8--104111,536,5-
42G 1/2--124111,536,5-
42G 3/4--184111,536,5184
42G 1--234111,536,5184
57G 3/4--18561442-
57G 1--23561442-
57G 11/4--28561642184
57G 11/2--28561642184

Build & Price

Outside diameter d1
Inch thread d2
Fine thread d2

Identification No.

Description of function

Breather caps GN 552 are used in oil reservoirs which must be ventilated.

If the oil is agitated, e.g. by a gear running in an oil bath or sump, there is the risk that the oil will leak. With properly aligned and shaped splash guards (see schematic drawing), these breather caps prevent the oil from leaking without substantially disrupting the ventilation / breathing process (pressure compensation).

The splash guards can be left out if their function is no longer needed or if a higher air flow rate is desired (coding 3 and 4).

A filter is used to protect the oil from outside pollution (dust). The filter is mounted behind the splash guards to ensure it makes no contact with the oil and becomes saturated by capillary effect.

For a very high air flow rate (the level of the oil reservoir changing quickly), Welding sockets GN 7490 should be used.

Air flow rate [l/min] in reliance on the pressure
difference Δp [mbar] container / outside space
with filter (40 µm):            
without filter:            
Type without splash guards (coding 3 and 4)

Air flow rate [l/min] in reliance on the pressure
difference Δp [mbar] container / outside space
with filter (40 µm):            
without filter:            
Type with splash guards (coding 0, 1 and 2)

Selected Part (How to order)

Weight: 0,012 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 quantity discounts.
With a total value (net) per order:
from 175,00 Euro -> 10 % discount
from 275,00 Euro -> 20 % discount
from 375,00 Euro -> 30 % discount
With a total value (net) per order:
All prices in accordance with our price list No. 52, valid from 1 May 2019, plus VAT only valid for Germany.

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