1、The valve adopts designs of advanced dynamics, with rapid intake and exhaust. 2、It can avoid air accumulation, prevent the formation of negative pressure, and has good sealing performance at low pressure. 3、This valve is mainly used for the intake and exhaust of the pipe and irrigation system. 4、Small size, large intake and exhaust, simple structure and reliable performance. 5、Made of high quality material, corrosion resistance, high reliability and long service life. 6、Installation method is simple, is the perfect irrigation accessories, mostly used in gardening and horticulture planting. 1 x Irrigation Air Valve Condition: 100% Brand NewItem Type: Irrigation Air ValveStyle: 1.5in DN40, 2in DN50(Optional)Material: PPColor: As shown in the picture 1.5in DN40 Size: Approx. 18.5x13cm / 7.3x 5.1in 2in DN50 Size: Approx.25x19cm / 9.8x 7.5in Weight: Approx.441g~1001g/ 15.6oz~ 35.3ozUses: Used in piping systems to prevent water hammer. It is installed at a relatively high point of the piping system. When the system is started, the air in the piping system is exhausted. When the system is closed, the air intake prevents the occurrence of vacuum. Installed on the head system.Drive Method: Hydraulic controlUse: Pressure reducing valveApplication: Agricultural sprinkler irrigation, greenhouseScope of Application: Water inlet and outlet air