My home is equipped with heating, and I bought a ball valve. The handle of the ball valve has the words China utility patent 26211267.

[ utility model] A conical sealing pipe joint connection structure-CN2621126.7 invalid patent

Applicant: Zhang Zengguang

Application date: January 1, 26-main classification number: F16L19/25

Abstract: This utility model discloses a conical sealing pipe joint connection structure. The valve body is concave at the joint to form a tapered surface, which is matched with the tapered boss at the head of the pipe joint. The taper of the tapered surface and the tapered boss is equal, and a surface contact is formed when connecting. The utility model overcomes the shortcomings of the existing pipe joint connection structure, and has the characteristics of simple structure, convenient installation and good sealing performance.