APCO AVV 空气/真空阀允许在管道填充或排空时将大量空气从管道中排出或进入管道。它们由浮子操作，并具有与阀门入口大小相同的大型排放孔。填充管道时，空气/真空阀处于打开状态。当管道充满时，流体进入阀门，浮子上升并关闭。管道充满后，空气/真空阀关闭并在正常运行期间保持关闭状态。排空管道时，浮子下降并允许空气进入，防止真空和可能的管道塌陷或破坏水柱分离。通过这种方式，大型排气孔可防止真空和水柱分离或管道塌陷。

AVV 还可配置为双体组合空气阀和 ARV 空气释放阀。双体式允许使用具有各种孔径和更高工作压力的各种空气释放阀。组合空气阀结合了空气/真空阀的功能，可在管道填充或排空期间排出大量空气，同时还具有空气释放阀，可在正常运行期间排出少量空气。组合空气阀通常安装在系统的所有高点上，这些高点需要空气/真空阀和空气释放阀来排气和保护管道。

DeZURIK 还提供两种类型的 APCO 单体组合空气阀：用于清洁流体的 APCO AVC 单体组合空气阀，或用于清洁和肮脏流体的 ASU 高性能单体组合空气阀。单体类型适用于需要紧凑性和/或因安装的可访问性而存在篡改风险的情况。

APCO AVV Air/Vacuum Valves allow large volumes of air to be exhausted from or admitted into a pipeline as it is being filled or drained. They are float operated and have a large discharge orifice equal in size to the valve’s inlet. When filling a pipeline, the Air/Vacuum Valve is open. As the pipeline fills, fluid enters the valve, raises the float and shuts-off. Once the pipeline is filled, the Air/Vacuum Valve closes and remains closed during normal operation. When draining the pipeline, the float drops and allows air to enter, preventing a vacuum and possible pipeline collapse or damaging water column separation. In this way, the large venting orifice protects against vacuum and water column separation or pipeline collapse.

The AVV can also be configured as a Dual Body Combination Air Valve with an ARV Air Release Valve. The dual body style allows use of a wide variety of Air Release Valves with a range of orifices and higher operating pressures. Combination Air Valves combine the functions of both an Air/Vacuum Valve to expel large volumes of air during filling or draining of the pipeline, along with an Air Release Valve to emit small quantities of air during normal operation. Combination Air Valves are typically installed on all high points of a system where both an Air/Vacuum Valve and an Air Release Valve are needed to vent and protect a pipeline.

DeZURIK also offers two styles of APCO Single Body Combination Air Valves: the APCO AVC Single Body Combination Air Valves for clean fluids, or ASU High Performance Single Body Combination Air Valves for use with either clean and dirty fluids. Single body styles are used where compactness is preferred, and/or where risk of tampering exists due to accessibility of the installation.

ARV.pdf

尺寸范围：
1/2-18″ (15-450mm)

车身类型：
阀体类型 140，尺寸为 .5-3 英寸 (15-80 毫米)，球墨铸铁阀体，标准配置为螺纹 NPT 入口和出口。ASME 125/150 或 250/300 法兰出口可作为选配。

140H 型阀体设计用于高压服务，尺寸为 1-3 英寸 (25-80 毫米)。

阀体类型 150，尺寸为 4-18 英寸 (100-450mm)，标配 ASME 125/150 或 250/300 法兰入口和带钢制保护罩的普通出口。泵房内使用的阀门有螺纹或法兰出口可供选择。

组合阀体型号 1800、1800K 包括一个空气/真空阀，该阀通过管道与截止阀和空气释放阀相连。

主体材料：
球墨铸铁、铸铁、碳钢、316不锈钢

SIZE RANGE:
1/2-18″ (15-450mm)

BODY STYLES:
Body Style 140, in sizes .5-3” (15-80mm), ductile iron bodies with a threaded NPT inlet and outlet as standard. ASME 125/150 or 250/300 flanged outlets are available as an option.

Body Style 140H are designed for higher pressure service and are available in sizes 1-3” (25-80mm).

Body Style 150, in sizes 4-18” (100-450mm), with ASME 125/150 or 250/300 flanged inlets and a plain outlet with steel protector hood as standard. Threaded or flanged outlets are available for valves used inside a pump house.

Combination Valve Body Styles 1800, 1800K include an Air/Vacuum Valve piped with a shutoff valve to an Air Release Valve.

BODY MATERIAL:
Ductile iron, cast iron, carbon steel, 316 stainless steel