| 摘要 |
<p>A check valve for a fully sealed heater, comprising a multi-way-type upper valve body (201), a flapper valve door (202), a swallowtail-shaped flapper valve rod (203), a flapper valve (204), and a lower valve body (205). The multi-way-type upper valve body (201) and the lower valve body (205) are screwed together to form a valve body cavity. In the valve body cavity, a port of the thickened upper valve body (201) serves as the flapper valve door (202) of the flapper valve (204). The flapper valve rod (203) is inserted into a preset hole of the multi-way-type upper valve body (201). Employment of the check valve allows for the effects of preventing reflux of a medium being heated and of blocking thermal transfer.</p> |
