LocationTianjin, China (Mainland)
EmailEmail: sales@likevalves.com
PhonePhone: +86 13920186592

QB1 single port exhaust valve

Short Description:

QB1 single port exhaust valve is mainly composed of valve body, upper cover, valve rod, floating ball and exhaust nozzle. It is used for small diameter pipes (dn50-200 mm). It can be used as the exhaust of the pipe, so that the pipe will not be closed or blocked. If the pump is powered off, the negative pressure will appear in the pipe at any time. Automatic suction can protect the safety of the pipe.


Product Detail

OEM/ODM Service

Product Tags

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Product use

1. This valve is suitable for water and hot water pipes with temperature not exceeding 100 , so that the air in the pipe can be completely discharged.

2. When installing double port exhaust valve, a protective valve and ball valve must be installed at the bottom to avoid water cut-off during inspection.

technical parameter

Valve body and cover Cast iron, stainless steel, carbon steel Test items
Floating ball 304 stainless steel, exhaust port, steel H59 brass working pressure 1.0MPa
seal ring Nitrile rubber Sealing pressure 1.1MPa
elasticity filature A3 Strength pressure 1.5MPa

QB1 single port exhaust valve drawing

1606462126(1) 1606462151(1)

Screw thread dimensions

Nominal diameter ZG H
15 1/22” 135 205
20 3/4” 135 205
25 1” 135 205
40 11/2” 150 205
50 2” 150 205

Flange dimensions

Nominal diameter D D1 D2 H
15 95 65 45 135 210
20 105 75 55 135 210
25 115 85 65 135 210
40 140 115 80 150 210
150 160 125 100 150 210

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