JS-B1107 Brass gate valve, Steel hand wheel  
Size: 1/2'' to 4''  
Technical Requirement:  
Before assembling, all parts should be clean, no oil or grease, remove all burrs and sharp edges.
Before connecting, body cap male thread should be coated with sealing glue.
Handle turn or close freely.
After assembling, test by water at pressure no less than 0.6MPA, no leakage.