Plastic, with Membrane

GN 774.1 Breather Caps

ELESA Original design TVD. Info

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d₁	d₂	d₃	d₄	l₁	l₂	Air flow rate in l/min Presssure drop in mbar	Sealing membrane FKM	EPDM

70	G 1 1/4	33	68,5	17	59	50	360	370
70	G 1 1/4	33	68,5	17	59	40	320	330
70	G 1 1/4	33	68,5	17	59	30	260	280
70	G 1 1/4	33	68,5	17	59	20	210	230
70	G 1 1/4	33	68,5	17	59	10	140	160
70	G 1 1/4	33	68,5	17	59	5	110	130

Filter combination produces no result.

Specification

Upper part (cap)
Plastic (Polypropylene PP)

Temperature resistant up to 50 °C
Red, RAL 3000RT
Membrane and flat seal EPDM (Ethylene propylene diene rubber)
Green, RAL 6001GN
Membrane and flat seal FKM (Fluor rubber, Viton^®)
Symbol black printed

Lower part (threaded part)
Plastic (Polypropylene PP)

Remperature resistant up to 50 °C
Black

Elastomer Characteristics

Plastic Characteristics

RoHS

Information

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.

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