8 Inch DN200 Water Valve With Actuator Mount For Farm Irrigation Main Pipeline

Description

The 8‑inch water valve, with a nominal diameter of DN200, is a large‑bore valve specifically designed for water utility systems. It is mainly employed for on‑off isolation in high‑flow water pipelines, including municipal water supply mains, large‑scale agricultural irrigation trunk lines, wastewater treatment plant effluent pipes, and power plant cooling water circuits.

The valve body incorporates a standard actuator mounting base, enabling integration with pneumatic or electric actuators for automated zonal control. Its thickened, corrosion‑resistant construction suits challenging outdoor conditions such as buried installation and open‑field irrigation, making it an essential component in large‑scale irrigation and municipal water engineering.

Core Specifications

Structural & Material Features
The valve body is integrally cast from ductile iron and coated with epoxy anti‑corrosion layers both inside and out, offering strong resistance to soil erosion and water‑borne rust – even when buried in farmland for prolonged periods. An ISO5211 universal mounting pad is provided on the top, allowing pneumatic actuators to be retrofitted without any body modification, thereby facilitating automated irrigation control networks. The internal soft‑seat sealing ensures bubble‑tight shutoff, maintaining zero leakage during pressure‑holding phases and preventing waste of irrigation water. The large‑bore flow passage delivers unimpeded water transport, and aquatic weeds or silt are less likely to accumulate and obstruct the valve.

Application Case
At a large‑scale modern agricultural irrigation base project in Chuzhou, Anhui Province, the entire main irrigation pipeline covering tens of thousands of mu of farmland was equipped with 8‑inch water valves. The base is divided into multiple irrigation zones. By taking advantage of the valve’s pneumatic actuator‑ready design, the system was linked to an intelligent irrigation control network, allowing each zone to be opened or closed independently on demand – achieving unattended zonal irrigation.

The valve’s excellent corrosion resistance suits the buried field environment, withstanding years of soil moisture and standing water while maintaining stable operation. This effectively overcomes the common problems of traditional irrigation valves, such as susceptibility to rust and lack of automated control.

Key Advantages

1. Large‑bore flow path – ensures sufficient water delivery and higher irrigation efficiency.

2. Standard actuator base – enables easy upgrade to automated irrigation systems, reducing labour costs.

3. Epoxy anti‑corrosion coating – provides durability and rust resistance in buried field conditions, extending service life.

4. Soft‑seal zero leakage – eliminates water loss in irrigation networks, conserving valuable water resources.