Breather Vent Plugs,Breather cap,Vent Plugs,Breather Plugs,Breather

GrandMfg®Breather vents, Air Vent Plugs, Vent breather Plugs, Breather Plugs, Breather drain plugs, vent plugs, Air released plugs,Air releasing fitting,Breather cap,Enhanced Brass Breather Vent,breather vent valve,Hydraulic Breather Cap
Material: Brass, aluminum and steel
Finish: Natural and Nickel Plated

Thread Type: BSP,Metric,NPT and Any Size OEM are welcome.
Metric thread: M8 to M60

NPT thread: NPT1/8” to NPT1”

BSP thread: G1/8” to G2”

Precision control pressure type:

Working Pressure range: 0.01 MPa to 0.03MPa(0.1bar to 0.3bar).

Working Temperature Range: -30 Celsius Degree to 180 Celsius Degree.

Function: Allow Sealed Pressure Systems to Vent Off Excess Pressure as Heat in System Builds up, Air Pressure is Allowed Back into System as System Cools,Protective cap prevents water or dirt from entering.Keep the system working in a certain low and good pressure improving the transmission efficiency.

Brass/SS304 filter type: 40-60 Micron brass filter or Stainless steel 304 filter.

Function: Allow Sealed Pressure Systems to Vent Off Excess Pressure as Heat in System Builds up, Air Pressure is Allowed Back into System as System Cools,Protective cap prevents water or dirt from entering.

Usage: Pump, Single Acting cylinders or valves, Crank Cases, Storage Tanks,Thin-wall container, Radiator, Hydraulic tanks,hydraulic reservoir,Hydraulic Cylinders, receivers,manifolds,Gearboxes, Speed Reducer, Compressor and Power Transmission.

Brass Breather Air Vent Plugs(Metric Thread & BSP)
Item No.	A	B	C	D	E Size	F	L	SW
GM-BVM10	11	5	3	9	M10x1	14	24	12
GM-BVM12	11	5.5	3	10	M12x1.5	17	24.5	14
GM-BVM14	11	5.5	3	10	M14x1.5	19	24.5	15
GM-BVM16	11	5.5	3	10	M16x1.5	22	24.5	17
GM-BVM18	11	5.5	3	10	M18x1.5	24	24.5	19
GM-BVM20	11	5.5	3	10	M20x1.5	26	24.5	19
GM-BVM22	11	5.5	3	10	M22x1.5	27	24.5	21
GM-BVM27	11	5.5	3	10	M27x1.5	32	24.5	24
GM-BVM33	11	5.5	3	10	M33x1.5	39	24.5	27
GM-BVG18	11	5	3	9	G 1/8"-28	14	24	12
GM-BVG14	11	5.5	3	10	G 1/4"-19	19	24.5	14
GM-BVG38	11	5.5	3	10	G 3/8"-19	22	24.5	17
GM-BVG12	11	5.5	3	10	G 1/2"-14	27	24.5	21
GM-BVG34	11	5.5	3	10	G 3/4"-14	32	24.5	24
GM-BVG10	11	5.5	3	10	G 1"-11	39	24.5	27
Air Releasing Pressure Range:0.01MPa to 0.03MPa(0.1Bar to 0.3Bar)

Brass Breather Vent Plugs SS304 Ball inside(Metric &BSP Thread)
Item No.	A	B	C	D	E Size	F	L	SW
GM-BVM8	11	5	3	9	M8x1	14	25.5	10
GM-BVM10	11	5	3	9	M10x1	14	24	12
GM-BVM12-M	11	5.5	3	10	M12x1.25	17	24.5	14
GM-BVM12	11	5.5	3	10	M12x1.5	17	24.5	14
GM-BVM14	11	5.5	3	10	M14x1.5	19	24.5	15
GM-BVM16	11	5.5	3	10	M16x1.5	22	24.5	17
GM-BVM18	11	5.5	3	10	M18x1.5	24	24.5	19
GM-BVM20	11	5.5	3	10	M20x1.5	26	24.5	19
GM-BVM22	11	5.5	3	10	M22x1.5	27	24.5	21
GM-BVM27	11	5.5	3	10	M27x1.5	32	24.5	24
GM-BVM30	11	5.5	3	10	M30x1.5	36	24.5	27
GM-BVM33	11	5.5	3	10	M33x1.5	39	24.5	27
GM-BVM36	11	5.5	3	10	M36x1.5	42	24.5	30
GM-BVG18	11	5	3	9	G 1/8"-28	14	24	12
GM-BVG14	11	5.5	3	10	G 1/4"-19	19	24.5	14
GM-BVG38	11	5.5	3	10	G 3/8"-19	22	24.5	17
GM-BVG12	11	5.5	3	10	G 1/2"-14	27	24.5	21
GM-BVG34	11	5.5	3	10	G 3/4"-14	32	24.5	24
GM-BVG10	11	5.5	3	10	G 1"-11	39	24.5	27
Follow China Machinery Industry Ministry Standard（内置不锈钢球）

Circular Brass Breather Air Vent Plug With transportation locking seal
Item No.	A	B	C	D	E Size	F	L	SW
GM-CBVM10	11	8	5	2.5	M10x1	14	27	12
GM-CBVM12	11	8	5.5	3	M12x1.5	17	27.5	14
GM-CBVM14	11	8	5.5	3	M14x1.5	19	27.5	15
GM-CBVM16	11	8	5.5	3	M16x1.5	22	27.5	17
GM-CBVM18	11	8	5.5	3	M18x1.5	24	27.5	19
GM-CBVM20	11	8	5.5	3	M20x1.5	26	27.5	19
GM-CBVM22	11	8	5.5	3	M22x1.5	27	27.5	21
GM-CBVM27	11	8	5.5	3	M27x1.5	32	27.5	24
GM-CBVM33	11	8	5.5	3	M33x1.5	39	27.5	27
GM-CBVG18	11	8	5	3	G 1/8"-28	20	27	12
GM-CBVG14	11	8	5.5	3	G 1/4"-19	20	27.5	14
GM-CBVG38	11	8	5.5	3	G 3/8"-19	22	27.5	17
GM-CBVG12	11	8	5.5	3	G 1/2"-14	26	27.5	21
GM-CBVG34	11	8	5.5	3	G 3/4"-14	32	27.5	24
GM-CBVG10	11	8	5.5	3	G 1"-11	40	27.5	27
Air Releasing Pressure Range:0.01MPa to 0.03MPa(0.1Bar to 0.3Bar)

Circular Brass Breather Vent Plugs With transportation locking seal SS304 Ball Inside(Metric & BSP)
Item No.	A	B	C	D	E Size	F	L	SW
GM-CBVM8	11	8	5	2.5	M8x1	12	27	10
GM-CBVM10	11	8	5	2.5	M10x1	14	27	12
GM-CBVM12-M	11	8	5.5	3	M12x1.25	17	27.5	14
GM-CBVM12	11	8	5.5	3	M12x1.5	17	27.5	14
GM-CBVM14	11	8	5.5	3	M14x1.5	19	27.5	15
GM-CBVM16	11	8	5.5	3	M16x1.5	22	27.5	17
GM-CBVM18	11	8	5.5	3	M18x1.5	24	27.5	19
GM-CBVM20	11	8	5.5	3	M20x1.5	26	27.5	19
GM-CBVM22	11	8	5.5	3	M22x1.5	27	27.5	21
GM-CBVM27	11	8	5.5	3	M27x1.5	32	27.5	24
GM-CBVM30	11	8	5.5	3	M30x1.5	36	27.5	27
GM-CBVM33	11	8	5.5	3	M33x1.5	39	27.5	27
GM-CBVM36	11	8	5.5	3	M33x1.5	42	27.5	30
GM-CBVG18	11	5	3	3	G1/8"-28	20	27	12
GM-CBVG14	11	5.5	3	3	G1/4"-19	20	27.5	14
GM-CBVG38	11	5.5	3	3	G3/8"-19	22	27.5	17
GM-CBVG12	11	6	3	3	G1/2"-14	26	27.5	21
GM-CBVG34	11	6.5	3	3	G3/4"-14	32	27.5	24
GM-CBVG10	11	7	3	3	G1"-11	40	27.5	27
Follow China Machinery Industry Ministry Standard（内置不锈钢球）

Hexagon Brass Breather Vent Plug(Metric & BSP Thread)
Item No.	A	B	C	D	E Size	d	SW	Remarks
GM-HBVM10	10	10.5	29.5	8	M10x1	18	17	Releasing Pressure Range:0.01MPa to 0.03MPa
GM-HBVM12	10	10.5	30.5	9	M12x1.5	18	19
GM-HBVM16	10	10.5	31.5	10	M16x1.5	18	21
GM-HBVM18	10	10.5	31.5	10	M18x1.5	18	24
GM-HBVM20	10	10.5	31.5	10	M20x1.5	18	26
GM-HBVM22	10	10.5	31.5	10	M22x1.5	18	27
GM-HBVM27	10	10.5	31.5	10	M27x1.5	18	32
GM-HBVM30	10	10.5	31.5	10	M30x1.5	18	36
GM-HBVM33	10	10.5	31.5	10	M33x1.5	18	39

GM-HBVG18	10	10.5	29.5	8	G 1/8"-28	18	17
GM-HBVG14	10	10.5	30.5	9	G 1/4"-19	18	19
GM-HBVG38	10	10.5	31.5	10	G 3/8"-19	18	21
GM-HBVG12	10	10.5	31.5	10	G 1/2"-14	18	27
GM-HBVG34	10	10.5	31.5	10	G 3/4"-14	18	36
GM-HBVG10	10	10.5	31.5	10	G 1"-11	18	39

Hexagon Brass Breather Vent Plug(NPT Thread)
Item No.	A	B	C	D	E Size	d	SW	Remarks
GM-HBVN18	10	10.5	32.5	11	NPT1/8"-28	18	17	Releasing Pressure Range:0.01MPa to 0.03MPa
GM-HBVN14	10	10.5	35	13.5	NPT1/4"-19	18	17
GM-HBVN38	10	10.5	35	13.5	NPT3/8"	18	19
GM-HBVN12	10	10.5	35.5	14	NPT1/2"	18	22
GM-HBVN34	10	10.5	38.5	17	NPT3/4"	18	27
GM-HBVN10	10	10.5	40.5	19	NPT1"	18	33

Hexagon Brass Breather Vent Plug with filter
Item No.	A	B	C	D	E Size	d	SW	Remarks
GM-HBVM10-BF	10	10.5	29.5	8	M10x1	18	17	No Pressure(30-40Miro)
GM-HBVM12-BF	10	10.5	32.5	10	M12x1.5	18	19
GM-HBVM16-BF	10	10.5	32.5	10	M16x1.5	18	21
GM-HBVM18-BF	10	10.5	32.5	10	M18x1.5	18	24
GM-HBVM20-BF	10	10.5	32.5	10	M20x1.5	18	26
GM-HBVM22-BF	10	10.5	32.5	10	M22x1.5	18	27
GM-HBVM27-BF	10	10.5	32.5	10	M27x1.5	18	32
GM-HBVM30-BF	10	10.5	32..5	10	M30x1.5	18	36
GM-HbVM33-BF	10	10.5	32..5	10	M33x1.5	18	39

GM-HBVG18-BF	10	10.5	32.5	8	G1/8"-28	18	17
GM-HBVG14-BF	10	10.5	32.5	10	G1/4"-19	18	19
GM-HBVG38-BF	10	10.5	32.5	10	G3/8"-19	18	21
GM-HBVG12-BF	10	10.5	32.5	10	G1/2"-14	18	26
GM-HBVG34-BF	10	10.5	32.5	10	G3/4"-14	18	32
GM-HBVG10-BF	10	10.5	32.5	10	G 1"-11	18	39

Hexagon Brass Breather Vent Plugs with filler(NPT Thread)
Item No.	A	B	C	D	E Size	d	SW	Remarks
GM-HBVN18-BF	10	10.5	31.5	11	NPT1/8"	18	17	No Pressure Brass FIller/SS304 Filter
GM-HBVN14-BF	10	10.5	35	13..5	NPT1/4"	18	17
GM-HBVN38-BF	10	10.5	35	13.5	NPT3/8"	18	19
GM-HBVN12-BF	10	10.5	35.5	14	NPT1/2"	18	22
GM-HBVN34-BF	10	10.5	38.5	17	NPT3/4"	18	27
GM-HBVN10-BF	10	10.5	40.5	19	NPT1"	18	34

Hexagon Brass Breather Vent Plug with filter(NPT Simple Plug)
Item No.	A	B	C	D	E Size	F(3)	SW	Remarks
GM-HBVN18-SP	15.2	8	7.2	5	NPT 3/8"	3.2	19	No Pressure with Brass FIller/SS304 Filler(NPT1/8 and 1/4" No filter)
GM-HBVN14-SP	19.2	8	11.2	6	NPT 3/8"	3.2	21
GM-HBVN38-SP	19.4	8	11.4	8	NPT 3/8"	3.2	24
GM-HBVN12-SP	20.7	8.2	12.5	8.5	NPT 1/2"	3.2	29
GM-HBVN34-SP	23.8	9	14.8	8.5	NPT 3/4"	3.2	34
GM-HBVN10-SP	27.4	9	18.4	8.5	NPT 1"	3.2	41

Hexagon Aluminum Vent Plug with Filter (SAE Thread)
Parts No.	SW	A	B	L	E Size	Remarks
GM-HAVP-5/16-24UNF	12	8.5	8	17.5	5/16"-24UNF	Small size no filter inside
GM-HAVP-3/8-24UNF	14	8.5	8	17.5	3/8"-24UNF
GM-HAVP-7/16-20UNF	14	8.5	8	17.5	7/16"-20UNF
GM-HAVP-1/2-20UNF	17	8.5	8	17.5	1/2"-20UNF
GM-HAVP-9/16-18UNF	22	8.5	9	17.5	9/16"-18UNF	Seals: NBR O-Ring,SS304 Filter 100Mesh inside
GM-HAVP-3/4-16UNF	22	8.5	12	20.5	3/4"-16UNF
GM-HAVP-7/8-14UNF	27	8.5	12	20.5	7/8"-14UNF
GM-HAVP-1.1/6-12UN	32	8.5	12	20.5	1-1/6"-12UN
GM-HAVP-1.5/16-12UN	38	8.5	12	20.5	1-5/16"-12UN

Flat Brass Silencer Breather(BSP Thread)
Item No.	A(Thread)	B	C	D(SW)	Remarks
GM-BSG18	G1/8"	5	10.5	12	Working Pressure:0-1MPa
GM-BSG14	G1/4"	7	12	17
GM-BSG38	G3/8"	8	14	19
GM-BSG12	G1/2"	9	15	22
GM-BSG34	G3/4"	9	15	27
GM-BSG10	G1"	11	20	36

Flat Brass Silencer Breather(PT Thread)
Item No.	A(Thread)	B	C	D(SW)	Remarks
GM-BSPT18	PT1/8"	7	12	12	Working Pressure:0-1MPa
GM-BSPT14	PT1/4"	9	15	17
GM-BSPT38	PT3/8"	10	17	19
GM-BSPT12	PT1/2"	12	19	22
GM-BSPT34	PT3/4"	13	21	27
GM-BSPT10	PT1"	15	23	36

Flat Brass Silencer Breather(R Thread)
Item No.	A(Thread)	B	C	D(SW)	Remarks
GM-BSR18	R1/8"	7	12	12	Working Pressure:0-1MPa
GM-BSR14	R1/4"	9	15	17
GM-BSR38	R3/8"	10	17	19
GM-BSR12	R1/2"	12	19	22
GM-BSR34	R3/4"	13	21	27
GM-BSR10	R1"	15	23	36

Flat Brass Silencer Breather(NPT Thread)
Item No.	A	B	C	D(SW)	Remarks
GM-BSN18	NPT1/8"	7	12	12	Working Pressure:0-1MPa
GM-BSN14	NPT1/4"	9	15	17
GM-BSN38	NPT3/8"	10	17	19
GM-BSN12	NPT1/2"	12	19	22
GM-BSN34	NPT3/4"	13	21	27
GM-BSN10	NPT1"	15	23	36