GN 774.1 Breather caps Plastic, with membrane


ELESA original design
code: TVD.

Product description


Breather caps GN 774.1 prevent the build up of a pressure drop over liquids in a tank.

They are used when a tank has to be rapidly emptied. The elastic membrane ensures a sufficient supply of air to prevent any vacuum build-up in the tank.

Besides that, the back pressure behind the membrane will prevent the escape of any liquid in the tank to the outside, especially during transport. If the tank is turned upside down with the additional back pressure from the liquid, it will be sufficient to keep the outlet firmly shut.


Plastic (Polypropylene PP)
  • temperature resistant up to 50 °C

Upper part (cap)
  • red, RAL 3000RTRT
    Membrane and flat seal EPDM (Ethylene-Propylene-Dim-caoutchoc)
  • greenGNGN
    Membrane and flat seal FKM (Fluor-caoutchouc, Viton®)
  • Symbol black printed

Lower part (threaded part)

Technical drawing

Hide technical drawing
GN 774.1 Breather caps, Plastic sketch

Article options / Table

Show / Hide columns
d1d2d3d4l1l2Air flow rate in l/min
Presssure drop
in mbar

Sealing membrane

70G 11/43368,5175950360370
70G 11/43368,5175940320330
70G 11/43368,5175930260280
70G 11/43368,5175920210230
70G 11/43368,5175910140160
70G 11/43368,517595110130

Build & Price

Outside diameter d1
Thread d2

Selected Part (How to order)

Weight: 0,080 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 compliant: -
This article does not conform to RoHS.
For RoHS conforming alternative products, please contact our Sales Department!
Phone +49 7723 6507- 0
Please note our quantity discounts.
With a total value (net) per order:
from 150 Euro -> 10 % discount
from 250 Euro -> 20 % discount
from 350 Euro -> 30 % discount
All prices in accordance with our price list No. 51, valid from 1 February 2018, plus VAT only valid for Germany.

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