Under normal working conditions, the
Throttle Valve is in the closed state, and the lower disc of the pilot valve is in the open state. The pipeline medium enters the air chamber above the
Universal Valve through the lower disc, closing the Universal Valve.
When the pipeline medium pressure is abnormal and reaches or exceeds the set setting force, the lower disc of the pilot valve closes under the action of the medium pressure, cutting off the passage of the pipeline medium entering the upper part of the Universal Valve. At the same time, the Throttle Valve is lifted by the push rod, that is, the pilot valve opens, and the medium in the air chamber above the Universal Valve is quickly discharged through the exhaust joint.
Under the strong action of the lower medium pressure, the Universal Valve opens instantly, and the pipeline medium is quickly and massively discharged from the outlet of the main valve, so that the pipeline medium pressure returns to the normal working pressure, ensuring the safety of the system.
When the pipeline pressure drops to about 90% of the set pressure set by the system, the Throttle Valve closes under the action of the spring, and at the same time, the lower disc of the pilot valve is pushed open by the push rod, and the pipeline medium enters the air chamber above the Universal Valve through the lower disc. The Universal Valve closes under the action of the pressure difference, ensuring the normal operation of the system.
When the pipeline medium pressure is found to be abnormal and the pilot valve fails to open, the
Relief Valve on the pilot valve can be manually opened to release the medium in the air chamber above the Universal Valve, so that the Universal Valve can be opened to release the abnormal medium pressure in the pipeline and ensure the safety of the system.
