Verbundventil

Details

Veröffentlichungs-Nr.

EP2503202

Aktenzeichen

EP12160459

Anmeldetag

21. März 2012

Veröffentlichung

16. Oktober 2013

Erteilung

16. Oktober 2013

Rechtsraum

EP

IPC

F16K31/40

Abstract

The invention provides a composite valve which is provided with a pilot type first control valve for a large flow rate and a second control valve for a small flow rate, can set a dimension and a shape of the second control valve for the small flow rate to optimum ones for the small flow rate control, can securely carry out an opening and closing of the first control valve for the large flow rate at a desired timing, and is hard to generate a malfunction, in order to achieve both an improvement of a flow rate control precision at a time of the small flow rate and an increase of a controllable flow rate (a reduction of a pressure loss). In the case that a lift amount of a second valve body (24) for controlling a small flow rate is equal to or less than a predetermined amount (Tc), a pilot passage (19) is closed by a pilot valve body (27), and a first valve port (13) is closed by a first valve body (15) for controlling a large flow rate, thereby taking a small flow rate control state in which a flow rate is controlled in correspondence to the lift amount of the second valve body (24), and in the case that the lift amount of the second valve body (24) goes beyond the predetermined amount (Tc), the pilot valve body (27) is moved up in conjunction with an upward movement of a valve shaft (25) so as to open the pilot passage (19), thereby taking a large flow rate control state in which the first valve body (15) opens the first valve port (13) on the basis of this.

Anmelder

Firma

Fujikoki Corporation

Land

🇯🇵 Japan

Fachgebiete