An improved check valve of rigid plastic tubing of inexpensive fabrication. The CHECK VALVES is made of plastic tubing into which a chord-like slot is cut in one embodiment and into which is dropped in the process of manufacture a valve support arm to which is connected a swinging valve member of a plate-like construction. The interior of the plastic tubing which forms the valve housing has an interior ring-like valve seat against which the valve member can seat in one direction of fluid flow. In the reverse direction of flow the valve member can be pivoted to open the valve. The valve housing is simply closed by a arcuate cover member fitting over the valve support arm. Check ValvesIn another embodiment a valve shaft fitted in a chord-like position through the housing may support for rotary movement thereon a valve member having a sleeve receiving the shaft. The valve member is generally circular with a chord-like boundary at one edge which is adapted to seat against a chord-like baffle. Check Valves In the process of manufacture the valve member is fitted inside the housing and the valve shaft is inserted from the exterior through an opening in the housing and the valve member sleeve and a second opening in the housing. The simply constructed valve may be provided with threads in order that it may be inserted in conventional plastic tubing, piping or the like.

MORE NEWS