GB/T 18693-2002
Agricultural irrigation equipment--Float type air release valves (English Version)

Standard No.

GB/T 18693-2002

Language

Chinese, Available in English version

Release Date

2002

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Status

Be replaced 2011-10

Replace By

GB/T 18691.4-2011

Latest

GB/T 18691.4-2021

Scope

This standard specifies the structure, technical requirements and test methods of the float type intake and exhaust valves (hereinafter referred to as intake and exhaust valves). This valve is used in irrigation systems containing water at a temperature not exceeding 60°C and which may contain certain types and concentrations of chemicals commonly used for irrigation. This standard applies to the inlet and exhaust valves where the float with a nominal size of 15-150mm is used as a seal or the float directly acts on the seal. This standard applies to intake and exhaust valves that allow atmospheric air to enter the piping system and/or discharge air from the piping to the atmosphere.

GB/T 18693-2002 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 18693-2002 Agricultural irrigation equipment--Float type air release valves was changed to GB/T 18691.4-2011 Agricultural irrigation equipment.Irrigation valves.Part 4:Air valves.