Utility Knife Blades,Knife Blade,Titanium Utility Blades,Single Edge Razor Blades Ningbo Jiangbei Chuangjia Stationery Factory , https://www.cjblade.com
1 soft seal gate valve leakage at the filler (1) packing gland is too loose, the packing can be evenly pressed gland nut tightened. (2) packing circle is not enough, should increase the filler. (3) due to the use of the filler is too long or improperly failed, should be replaced with new packing, replacement must be noted that the joints between the turns should be staggered cross 1200. 2 soft seal gate valve and valve seat sealing surface (1) between the sealing surface dirt, can be washed to eliminate it. (2) If the sealing surface is damaged, it should be re-ground, if necessary, re-welding and processing, grinding sealing surface must be smooth, the roughness of not less than 0.4. 3 soft seal gate valve body and valve cover leakage nut tighten tight or elastic uneven, can be re-adjusted. (1) Flange sealing surface damage (straight grooves or grooves, etc.) should be amended. (2) gasket is damaged, new gasket should be replaced. 4 soft seal gate valve stem inflexible (1) packing pressed too tight, should be properly loosen the packing gland nuts. (2) The packing gland position is not correct, the valve stem stuck, should be evenly screwed packing gland nut, the gland to return to normal position. (3) Threaded stem and stem nut damage, should be removed after the elimination. Soft seal gate valve is widely used. Soft seal gate valve, industrial valves, soft seal gate valve opening and closing pieces is the gate, gate direction of motion and fluid perpendicular to the gate valve can only be fully open and fully closed, can not be adjusted and throttling. The gate has two sealing surfaces. The two sealing surfaces of the most commonly used gate valves form wedges, which vary from valve parameter to valve temperature, typically 50 ° C and 2 ° 52 '' when the medium temperature is not high.