GB/T 18691.4-2021
Agricultural irrigation equipment—Irrigation valves—Part 4: Air valves (English Version)

Standard No.

GB/T 18691.4-2021

Language

Chinese, Available in English version

Release Date

2021

Published By

国家市场监督管理总局、中国国家标准化管理委员会

Latest

GB/T 18691.4-2021

Replace

GB/T 18691.4-2011

Scope

This document specifies the design requirements, performance requirements, conformity assessment, marking and packaging of intake and exhaust valves. The inlet and outlet valves are 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 is applicable to hydraulically driven irrigation intake and exhaust valves with a nominal size not less than DN15. This type of valve operates either by directly applying force to the opening and closing parts through the float or by applying force to the opening and closing parts through the float through the mechanical lever. achieve operation. These valves can also be operated with force applied by an adjustable pilot valve.

GB/T 18691.4-2021 Referenced Document

• GB/T 18691.1-2021 Agricultural irrigation equipment—Irrigation valves—Part 1：General requirements
• GB/T 18691.2-2021 Agricultural irrigation equipment—Irrigation valves—Part 2: Isolating valves

GB/T 18691.4-2021 history

• 2021 GB/T 18691.4-2021 Agricultural irrigation equipment—Irrigation valves—Part 4: Air valves
• 2011 GB/T 18691.4-2011 Agricultural irrigation equipment.Irrigation valves.Part 4:Air valves
• 2002 GB/T 18693-2002 Agricultural irrigation equipment--Float type air release valves

GB/T 18691.4-2021 -All Parts