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Double Ball Air Release Valve for Water Line
Air Release Valve
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Double Ball Air Release Valve for Water Line

Series: KF-KQF

Type: Double Ball

Size: DN40-200mm, NPS 1.5”- 8”

Pressure Rating: PN10/PN16

Certificate: ISO, CE, WRAS, ACS

Sample: Available

Service: OEM & ODM

Ductile iron air release valves are critical components in pipeline systems, serving to prevent negative pressure conditions and efficiently regulate air flow. These valves operate automatically: when internal pressure drops below atmospheric levels, they rapidly intake air to avert vacuum formation; conversely, when pressure increases, accumulated air is expelled to prevent air pockets.

A key feature is their self-sealing mechanism, which activates immediately upon contact with liquid, ensuring zero leakage. Available in float-type and dual-ball designs, double orifice flange air valve cast iron are particularly valued for their robust construction, straightforward operation, and reliable performance under varying hydrodynamic conditions. The double exhaust valve configuration enables high-efficiency air discharge during filling and suction during drainage. Widely applied in water conservancy projects, petroleum pipelines, and chemical industrial systems, these valves play an essential role in maintaining pipeline structural integrity, preventing cavitation, and ensuring smooth, uninterrupted medium flow.

    Specifications

    Design Standard

    EN1074-2000

    Flange Dimension

    EN1092-2 PN10/PN16

    Test Standard

    EN12266

    Temperature

    -20℃~80℃

    Body Material

    Cast Iron, Ductile Iron, Carbon Steel

    Ball Material

    ABS, EPDM

    Sealing Material

    EPDM

    Compact Design

    Double orifice & Double chamber

    Stabilized Floater

    High discharge capacity up to sonic velocity

    No Arms or Levers

    Prevent vibrating, bending, direct closure of the float

    Coating Grade

    Conventional and special conditions of C1-C5 & CX

    Certificates

    ISO9001, CE, WRAS, ACS

    Application

    Good for distribution pipeline system

    Dimension

    Drawing-Dobule Ball Air Valve

    Size

    A

    PN10/16

    f

    H

    Ф D

    Ф D1

    Ф D2

    N - Ф d

    B

    DN40

    250

    150

    110

    88

    4-19

    19

    3

    208

    DN50

    250

    165

    125

    100

    4-19

    19

    3

    208

    DN65

    250

    185

    145

    120

    4-19

    19

    3

    208

    DN80

    325

    200

    160

    135

    8-19

    19

    3

    250

    DN100

    325

    220

    180

    156

    8-19

    19

    3

    270

    DN125

    325

    250

    210

    186

    8-19

    19

    3

    270

    DN150

    440

    285

    240

    212

    8-23

    19

    3

    344

    DN200

    612

    340

    295

    268

    8-23

    12-23

    20

    3

    468

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