초록 ▼

A ball valve made entirely of plastics material comprising a tubular casing with connection pieces which are fastened to both its ends and which together form a through passage for a medium, a ball disposed in the through passage inside the casing and provided with a through opening, operating means

A ball valve made entirely of plastics material comprising a tubular casing with connection pieces which are fastened to both its ends and which together form a through passage for a medium, a ball disposed in the through passage inside the casing and provided with a through opening, operating means formed by a spindle inserted into an opening in the casing, cooperating with the ball, and provided with an operating grip to enable the ball to be turned so as to close or open the through passage. The casing consists of a substantially cylindrical outer casing to each end of which the connection pieces are welded, and of an inner casing disposed therein. The inner casing being constructed of two parts each of which having a seat. Both parts are connected by means of a screwthread and enclose the ball in between them. The inner casing at each end being provided with an external cylindrical surface projecting out of the outer casing each of said surface cooperating with an internal cylindrical surface on the two connection pieces to form a guide for these connection pieces.

대표청구항 ▼

Ball valve made entirely of plastics material, comprising a tubular casing and a pair of connection pieces which are fastened to both its ends and which together form a through passage for a medium, a ball disposed in the through passage inside the casing and provided with a through opening, an oper

Ball valve made entirely of plastics material, comprising a tubular casing and a pair of connection pieces which are fastened to both its ends and which together form a through passage for a medium, a ball disposed in the through passage inside the casing and provided with a through opening, an operating means comprising a spindle inserted into an opening in the casing, cooperating with the ball, and having an operating grip to enable the ball to be turned so as to close or open the through passage, said casing comprising a substantially cylindrical outer casing to each end of which the connection pieces are welded, and an inner casing which is disposed within said outer casing and is constructed of two parts connected together each part having a seat and which enclose the ball between them, the inner casing being provided at each end with an external cylindrical surface projecting axially out of the outer casing, and such external cylindrical surface slidably cooperating with an internal cylindrical surface on the two connection pieces to define a guide for axial displacement of said connection pieces relative to said inner casing.