GB/T 18691.3-2021 Agricultural irrigation equipment—Irrigation valves—Part 3:Check valves

Scope

This document specifies the design requirements, performance requirements, consistency assessment, marking, and packaging of the check valve. The check valve is suitable for irrigation systems where the water temperature does not exceed 60°C, and the water may contain certain types and concentrations of fertilizers or chemicals commonly used in agriculture.
This document applies to hydraulically driven irrigation check valves with a nominal size of not less than DN 15. The design working state of the check valve is fully open and fully closed, but it can also operate in any intermediate state for a long time.

Development Information

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