... , PVC foot valves and PE gas valves. Qinhuangdao YDKL Plastic Co., Ltd., founded by Yanshan University in 2000, is a high ... company specializing in the production of plastic valves, auto plastic parts, injection moulds and various plastic products. Plastic valves we supply include PVC ... PVC foot valves and PE gas valves.With a factory area covering approximately 5,500 square meters, we employ 100 staff ...