Pressure relief valves are essential components of hydraulic systems as they protect the system from overpressure conditions.
When the hydraulic system experiences an excessive pressure build-up, the pressure relief valve activates to release the excess pressure and prevent damage to the system components.
The pressure relief valves used in the PC200-7 and PC200-8 excavators are designed to meet the specific requirements of these machines. These valves are typically installed in the main hydraulic circuit, which consists of the hydraulic pump, control valves, and hydraulic cylinders.
One of the key specifications of the pressure relief valves is the pressure setting. The pressure relief valve is set to open and release pressure when the system pressure exceeds a predetermined limit. The pressure setting can be adjusted based on the specific requirements of the excavator and the tasks it is intended to perform. The PC200-7 and PC200-8 excavators are equipped with pressure relief valves that typically have a pressure setting in the range of 2500 to 3000 pounds per square inch (psi).
Another important specification of the pressure relief valves is the flow capacity.
The flow capacity determines the amount of hydraulic fluid that can pass through the valve per unit of time. It is crucial to have an adequately sized pressure relief valve to handle the flow rate required by the hydraulic system. The flow capacity of the pressure relief valves used in the PC200-7 and PC200-8 excavators is typically in the range of 40 to 60 gallons per minute (gpm).
Pressure relief valves also have a response time specification, which refers to the time it takes for the valve to open and release pressure once the predetermined limit is exceeded. A quick response time is important to ensure that the system pressure does not rise to dangerous levels before the valve activates. The pressure relief valves in the PC200-7 and PC200-8 excavators are designed to have a fast response time of around 0.1 to 0.2 seconds.
Additionally, pressure relief valves have other features and specifications that contribute to their performance and reliability. These may include built-in check valves, which allow flow in one direction while preventing reverse flow, and integral pressure gauge ports for monitoring system pressure.
