Joints can be separated into two classes: functional and structural. Joints are divided into three different functional classes. They are synarthroses, amphiarthroses, and diarthroses. Synarthroses means the joint is immovable, amphiarthroses means the joint is slightly moveable, and diarthroses means the joint is freely moveable.
minimum recommended protection lightweight and easy to use requires no maintenance osha cdc epa and nyc doh mh recommend using a n95 disposable respirator as minimum protection from mold and dust
Series 406-NRS-RW NRS Flanged Gate Valves are used in commercial applications in potable water distribution systems. They feature an epoxy-coated, cast iron body with flanged connections, resilient-wedge disc, stainless steel non-rising stem and cast iron handwheel (or nut and valve key). Series 406-NRS-RW complies with AWWA C509 specifications.