English
Description
This automatic air release valve is designed for agricultural irrigation systems to manage air accumulation and prevent vacuum conditions. It performs two core operations: discharging large volumes of air during pipeline filling, and drawing in air during system emptying to avoid vacuum negative pressure that may damage pipes and components. The valve is suitable for commercial procurement and industrial applications requiring consistent pipeline performance.
The following custom options are available for specific business operations requirements:
Connection types: Male thread is standard; other options available upon request
Pressure ratings: Higher pressure ratings available
Material options: Alternative engineering plastics available upon request
Technical Parameters
Item No. | Description | Size | Packing (Pcs) | Measurement (cm) | G.W (Kg) |
EV1/2 | Air release valve | 1/2" | 100/2000 | 54×35×28 | 12 |
EV3/4 | Air release valve | 3/4" | 10/200 | 54×35×28 | 16 |
EV01 | Air release valve | 1" | 10/200 | 54×35×28 | 18 |
EVA01 | Air release valve | 1" | 2/120 | 54×35×28 | 25 |
EVA02 | Air release valve | 2" | 1/15 | 54×35×28 | 12 |
EVB02 | Air release valve | 2" | 1/10 | 54×35×28 | 21 |
Parameter | Specification |
Pressure Rating | ISO PN10 |
Working Pressure Range | 0.1 - 10 bar |
Maximum Working Temperature | 60°C |
Size | DN | Inch | Quick Intake/Exhaust Port (mm²) | Microvent Port (mm²) |
3/4" | 20 | 3/4" | 20.2 | 320 |
1" | 25 | 1" | 20.2 | 320 |
2" | 50 | 2" | 45.0 | 1590 |
Size | DN | Inch | Connection | D (mm) | H (mm) |
3/4" | 20 | 3/4" | Male thread | 97 | 160 |
1" | 25 | 1" | Male thread | 97 | 160 |
2" | 50 | 2" | Male thread | 143 | 230 |
Note: Dimensions shown are for reference. Intake and exhaust applications include system water injection, drainage, and negative pressure conditions.
Product Features
The valve operates in two modes to support full irrigation system cycles. During system filling, it releases trapped air to eliminate flow restrictions and uneven water distribution. During system emptying, it allows air entry to prevent vacuum formation that could cause pipe collapse or component damage. This dual functionality supports continuous and stable system operation.
The valve features an internal geometry designed for efficient air movement. This design enables rapid intake and exhaust, allowing systems to fill and drain at consistent rates. Air flow capacities are specified in the technical tables below for different valve sizes.
The valve maintains sealing within a working pressure range of 0.1 to 10 bar, with an ISO PN10 pressure rating. It seals at pressures as low as 0.1 bar, preventing water loss across the entire operating range.
Strategic installation provides protection for critical irrigation system parts. Installing the valve downstream of pumps prevents negative pressure damage to seals and impellers. Placement at filters and fertilizer tanks discharges air that could interfere with filtration or fertilizer injection. Installation at pipeline high points eliminates air pockets that may cause water hammer.
Product Uses
This air release valve is used in multiple irrigation scenarios:
Irrigation system pipe networks to eliminate air pockets
Pump downstream protection for smooth startup and shutdown
Filter and fertilizer tank protection to maintain operational efficiency
Pipeline high points to prevent water hammer
Greenhouse irrigation systems requiring consistent water delivery
Sloping terrain installations with elevation changes
System drainage applications to enable complete pipe emptying
Install the valve vertically with the inlet connection at the bottom. Apply PTFE tape to male threads before connection. For maintenance convenience, install an isolation valve below the air release valve to allow servicing without draining the entire system. After installation, slowly pressurize the system to verify air exhaust and check for leaks.
Regular inspection includes checking for leaks around the valve body and connections. If the valve fails to seal, remove and clean internal components to remove debris that may prevent proper float operation.
FAQ
Air release valves exhaust air from pipelines during system filling to prevent air pockets, and draw air into pipelines during system emptying to prevent vacuum negative pressure that could collapse pipes.
Install at pipeline high points, immediately downstream of pumps, at filters and fertilizer tanks, and before and after elevation changes in the pipeline.
The valve operates within a range of 0.1 to 10 bar, with an ISO PN10 pressure rating.
Available sizes include 1/2", 3/4", 1", and 2", all with male thread connections. Select size based on pipeline diameter and system flow rate.
