| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve adhesion between a metallic valve body and a resin layer to be resin-formed at the valve body by forming a synthetic resin tubular part in at least one place of the piping end connecting of the metallic valve body, and resin-forming the tubular part integrally at the metal part of the valve body through an adhesive. SOLUTION: In a valve body 1, a bonnet 3 is screwed into a body 2 to form a valve casing. Inner metal parts 2a, 3a of the body 2 and bonnet 3 are respectively covered with outer synthetic resin layers 2b, 3b through an adhesive 21 so as to be integrally resin-formed. Synthetic resin tubular parts 2c, 2d are integrally resin-formed at both piping end connection of the body 2 using a synthetic resin.</p> |
