Plastic Combination Air Valves for Farm Irrigation

Product Overview

Full series of plastic combination air valves for farm irrigation systems.

At Metalsin, we provide efficient and durable fluid control solutions for modern agriculture. Our Plastic Combination Air Valve is a “Triple Function” device specifically engineered for farm irrigation systems. By managing air intake and exhaust with high precision, it protects your irrigation network from air pockets and vacuum-related damage, ensuring uniform water distribution and system longevity.

Construction Features

The typical structural design of a plastic combination air valve.

The Metalsin plastic air valve features a compact, corrosion-resistant design. Based on our technical cross-section, the core components include:

1. Insect/Debris Screen: Prevents external contaminants and pests from entering the valve.
2. Kinetic Orifice: Handles large-volume air exhaust and intake.
3. Dynamic Seal: Ensures leak-proof performance under varying pressures.
4. Automatic Orifice: Facilitates micro-venting during pressurized operation.
5. Body: Made of glass reinforced Nylon.
6. O-Ring: Provides a secure internal seal.
7. Male Threaded End: Designed for easy installation.
8. Float: High-buoyancy component for precise level sensing.
9. Peel Seal: A specialized mechanism for sensitive automatic venting.
10. Kinetic Plug: Controls the large-scale air-water interface.
11. Drainage Elbow: Directs any residual moisture away from the system.

Technical Specifications & Working Principles

Engineered for durability in harsh outdoor agricultural environments, our plastic air valves feature a high-strength glass-reinforced nylon body and EPDM seals for superior chemical and weather resistance. Available in 1″ and 2″ sizes with NPT or BSPT male threaded connections, these valves support a working pressure of 0.2 to 10 bar (with a 35 bar burst pressure) and operate reliably within a temperature range of 0°C to 60°C.

Two typical air flow charts for Metalsin plastic combination air valves used in farm irrigation systems: Left – for air relief and intake during pipeline filling, draining and vacuum conditions; Right – for pressurized air release/purging under operation conditions.

The Metalsin Plastic Combination Air Valve ensures continuous pipeline protection through a triple-function logic: it utilizes a kinetic orifice to exhaust massive air volumes during initial filling and provide instant vacuum relief during drainage to prevent pipe collapse, while its specialized peel seal mechanism automatically purges accumulated micro-bubbles during pressurized operation without interrupting system flow.

Why Your Irrigation System Needs Plastic Air Valves

Essential for professional irrigation setups like drip, sprinkler, and greenhouse systems, Metalsin air valves leverage a glass-reinforced nylon body to deliver metal-like mechanical strength in a lightweight, cost-effective package. This high-performance material is specifically engineered for the irrigation industry, offering extreme durability with burst pressures up to 500 psi, total immunity to rust and agricultural chemicals, and superior UV stability for reliable outdoor operation between 0°C and 60°C.

Typical application of the plastic combination air valves in farm irrigation services.

By integrating these advanced valves into your network, you safeguard your infrastructure against air hammers and vacuum collapse while significantly improving water distribution uniformity. Metalsin provides the heavy-duty protection required for modern farming at a more competitive price point than traditional metal alternatives, ensuring your system operates at peak efficiency season after season.