PRECAUTIONS FOR INSTALLATION： 1)The installation position, height, and direction of inlet and outlet must meet the design requirements. For the direction of medium flow,Inlet: 1/4"" NPT female, outlet: 1/4"" NPT female, The connection should be firm and tight. 2)Visual inspection must be carried out before valve installation. For valves with a working pressure greater than 1.0 MPa and a cut-off function on the main pipe, the strength and tightness test should be carried out before installation, and then used after being qualified.For control and adjust the flow for gas and liquid and other media Female Thread Dimension: 11.9mm Working Pressure: 600 Psi 3)If it leaks, it is recommended to seal both ends with a little Teflon tape.