| 摘要 |
<p>A proportional pressure regulating valve (30) of cartridge type, with direct actuation and having an axially slidable cone shutter (14) that can be positioned with the conical lower end thereof on a sealing seat (9b) on the cartridge (9) so as to control the passage of the fluid between the port (1) and the port (2) of the regulating valve; said cartridge (9) being fixed to an intermediate bushing (7) on which an actuator (40) is fixed in turn; characterized in that said regulating valve (30) incorporates and performs both the regulating valve and check valve function; said check valve function preventing the passage of the fluid towards the port (2) up to the generation of a pressure value that is summed to the pressure regulated on the port (1) by the shutter (14). The integrated check valve comprises at least one ring shutter (8) which is arranged in a sealing fashion on an edge (7b) of an intermediate bushing (7) and a spring (10) suitably compressed for generating a specific force on the shutter (8) in order to obtain the counter-pressure required to stabilize the valve.
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