Brass
Breather Valves

GN 881


RoHS Compliant

 

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Specification
Information

Valve body: Brass
Breather cap: Stainless steel AISI 304
Gasket: Brass with silicone-rubber coating (VMQ)
Spring: Stainless steel, AISI 301
Sealing washer: DIN 7603 A, soft iron 1.0338

Shipping

Once the opening pressure given in the table is exceeded, GN 881 breather valves with gasket will vent into a container, preventing excessive internal container pressure.
In its normal state, the gasket seals the container and prevents dirt and dust from getting inside of it.
The above diagram shows the air outlet as a factor of the opening pressure.
The valves are checked for leak tightness and opening pressure.
Temperature resistant from -22° F to 212° F (-30° C to +100° C).
Available upon request: body made of other materials, other opening pressure (20 mbar), and with dipstick.

See our Technical Section for pipe thread size details.
 
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Metric Thread Table

Dimensions in:

millimeters
(inches)

Part Number d1
Thread
Opening pressure
in mbar ±20%
d2 d3 e l1 l2 l3 A/F
881-M12X1.5-200-MS-M
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M12 x 1.5 200 18
(.71)
22
(.87)
23.5
(.93)
8.5
(.33)
11.5
(.45)
26.5
(1.05)
22
(.87)
881-M14X1.5-200-MS-M
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M14 x 1.5 200 20
(.79)
22
(.87)
23.5
(.93)
8.5
(.33)
11.5
(.45)
26.5
(1.05)
22
(.87)
881-M16X1.5-200-MS-M
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M16 x 1.5  200 22
(.87)
22
(.87)
23.5
(.93)
8.5
(.33)
11.5
(.45)
26.5
(1.05)
22
(.87)
881-M18X1.5-200-MS-M
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M18 x 1.5 200 24
(.94)
22
(.87)
23.5
(.93)
8.5
(.33)
11.5
(.45)
26.5
(1.05)
22
(.87)
881-M20X1.5-200-MS-M
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M20 x 1.5 200 26
(1.02)
22
(.87)
29
(1.14)
8.5
(.33)
12
(.47)
31
(1.22)
27
(1.06)
881-M22X1.5-200-MS-M
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M22 x 1.5 200 27
(1.06)
22
(.87)
29
(1.14)
8.5
(.33)
12
(.47)
31
(1.22)
27
(1.06)
881-M24X1.5-200-MS-M
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M24 x 1.5 200 29
(1.14)
22
(.87)
32.5
(1.28)
8
(.31)
12
(.47)
27
(1.06)
30
(1.18)
881-M26X1.5-200-MS-M
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M26 x 1.5 200 32
(1.26)
22
(.87)
34
(1.34)
8
(.31)
12
(.47)
27
(1.06)
32
(1.26)
881-M30X1.5-200-MS-M
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M30 x 1.5 200 36
(1.42)
22
(.87)
39
(1.54)
8
(.31)
12
(.47)
27
(1.06)
36
(1.42)
BSPP Parallel Thread Table

Dimensions in:

millimeters
(inches)

Part Number d1
Thread
Opening pressure
in mbar ±20%
d2 d3 e ˜ l1 l2 l3 A/F
881-G1/4-200-MS-M
Download the CAD
G 1/4 200 20
(.79)
22
(.87)
23.5
(.93)
8.5
(.33)
11.5
(.45)
26.5
(1.05)
22
(.87)
881-G3/8-200-MS-M
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G 3/8 200 23
(.91)
22
(.87)
23.5
(.93)
8.5
(.33)
11.5
(.45)
26.5
(1.05)
22
(.87)
881-G1/2-200-MS-M
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G 1/2 200 26
(1.02)
22
(.87)
29
(1.14)
8.5
(.33)
12
(.47)
31
(1.22)
27
(1.06)
881-G3/4-200-MS-M
Download the CAD
G 3/4 200 32
(1.26)
22
(.87)
34
(1.34)
8
(.31)
12
(.47)
27
(1.06)
32
(1.26)
881-G1-200-MS-M
Download the CAD
G 1 200 39
(1.54)
22
(.87)
44
(1.73)
8
(.31)
12
(.47)
27
(1.06)
41
(1.61)