| 摘要 |
<p>PURPOSE:To regulate the air supply into the pressure tank automatically, by lifting the valve body upon increase of the air volume in the pressure tank to choke the joint opening while holding the choked state through the surface tension of foam. CONSTITUTION:Upon increase of air in a pressure tank 1, first valve body 11 will lift quickly in the upper valve chamber 4 to choke the opening of a thrugh- hole 9a. Consequently the air supply into the pressure tank 1 is blocked by an automatic air supply mechanism 18 to regulate the air volume in said tank 1 automaically while to prevent the overfeed. Since the first valve body 11 is held by the surface tension due to the form near the upper valve seat 9, the opening of the through-hole 9a is choked to block the air feed into said tank 1.</p> |
