Brass

GN 881 Breather Valves

Show filter

d₁		Opening pressure in mbar ±20%	d₂	d₃	e ≈	l₁	l₂	l₃	A/F

M 12 x 1,5	-	200	18	20	23,5	8,5	11,5	24,5	22
M 14 x 1,5	G 1/4	200	20	20	23,5	8,5	11,5	24,5	22
M 16 x 1,5	-	200	22	20	23,5	8,5	11,5	24,5	22
-	G 3/8	200	23	20	23,5	8,5	11,5	24,5	22
M 18 x 1,5	-	200	24	20	23,5	8,5	11,5	24,5	22
M 20 x 1,5	-	200	26	20	29	8,5	11,5	24,5	27
M 22 x 1,5	-	200	27	20	29	8,5	11,5	24,5	27
-	G 1/2	200	26	20	29	8,5	11,5	24,5	27
M 24 x 1,5	-	200	29	20	32,5	8	12	25	30
M 26 x 1,5	G 3/4	200	32	20	34	8	12	25	32
M 30 x 1,5	-	200	36	20	39	8	12	25	36
-	G 1	200	39	20	44	8	12	25	41

Filter combination produces no result.

Specification

Valve body
BrassMS

Breather cap
Stainless steelM AISI 304

Gasket
Brass
with silicone-rubber coating (VMQ)

Pressure spring
Stainless steel AISI 301

Seal DIN 7603 A
Soft iron 1.0338

Temperature resistant from -30 °C to +200 °C

Stainless Steel Characteristics

RoHS

Accessory

Mounting Nuts GN 7430

On request

Other material

With other opening pressure 50 mbar (yellow ring)

With oil dipstick

Information

Once the opening pressure given in the table is exceeded, breather valves GN 881 with gasket will vent into a container and so protect against excessive inside container pressure. A green colour ring marks the opening pressure of 200 mbar.

In its normal state, the gasket closes the container and so prevents dirt or dust getting inside the container.

The above diagram shows the air outlet as a factor of the opening pressure.

The valves are checked for leak tightness and opening pressure.

Assembly instruction:
For mounting on walls of less than 4 mm thickness please use a mounting nuts GN 7430.

How to order