Patent ID: 9182048
Filing Date: 2015-11-10
Classification: F16K

Abstract:
1. A switchable pressure limiting valve comprising: a housing that defines a sealing seat; an electromagnet having an armature; and a device for opening and closing a passage for a fluid stream between a P-connection and a T-connection, the device including: wherein opening of the valve is determined by a balance of forces at the tappet, a pressure force of the fluid at the P-connection, a pressure force of the fluid at the T-connection, and the first force of the first spring and the second force of the second spring acting upon the tappet, the valve opening when the pressure force at the P-connection outweighs the balance of the other forces, wherein in a switched-on state of the electromagnet, the first force of the first spring is varied by a position of the armature relative to the tappet, and wherein the armature of the electromagnet does not impinge onto the diaphragm, but tensions to a greater or lesser extent the first spring which in turn presses the tappet against the diaphragm such that the diaphragm is urged toward the sealing seat.