الوصف

Feature: 1、small in size and light in weight , easy to install and maintain. 2、simple and compact comnstruction , quick *0 degrees on-off operation. 3、minimized operating torgue , energy saving. 4、flower curve in straight line, excellent regulation performance 5、long working tlife ****0tiems on-off without leakage 6、wide selection of material, ，application of various medium 7、certificate of uv，ISO，CE.