Thermal oil pipeline pressure valve
Thread Content
There is a project currently under way: the factory is using two organic heat carrier boilers connected to the same main pipeline. One boiler is designed for a pressure of 0.8 MPa, while the other is designed for 1.1 MPa. Both pipelines are old, and the design team specified a design pressure of 1.1 MPa for the main pipeline. Now the factory wants to install a new unit, but this unit is designed for only 0.8 MPa. What methods can be used to reduce the design pressure? I would like to ask: why is a pressure relief valve installed in the heat transfer oil pipeline? Just install it directly on the fuel supply pipe, right? Must the discharge pipe of the safety valve be connected to the sump?
Liquid pressure relief valves are rare. It’s sufficient to install safety valves on the piping system to keep the system pressure below 0.8 Mpa; heat transfer oil does not require such a high pressure. The safety valve releases pressure back to the circulation tank
The advantage of heat transfer oil is that it enables high temperatures to be achieved at low pressures. Pressure regulation is generally accomplished by adjusting the opening degree of the valve at the outlet of the heat transfer oil circulation pump. New equipment with 8 kilograms of heat transfer oil can operate safely; the outlet pipe of the safety valve is usually connected to the overflow pipe of the high-level tank, and the fluid flows through this overflow pipe into the low-level oil storage tank. Both the high-level tank and the oil storage tank are vessels operating at atmospheric pressure.
Differential pressure control valve, pressure balancing, boiler flow rate
Your description isn’t clear. What is the operating pressure of the heat transfer oil system?
It can be controlled by pressure difference! If the outlet of the pipeline is connected to the pump’s inlet line, can’t the pressure be adjusted then? A safety valve is installed at the pipeline outlet to regulate the pressure to 0.8 MPa, thereby balancing the pressure and preventing overpressure. Generally, pipelines for heat transfer oil are equipped with a high-level tank. There are so many places where the pressure can be adjusted. Why must a pressure relief valve be used? Also, the original poster didn’t clarify what the typical circulation pressure for a furnace is, so it’s not clear exactly where pressure adjustment is needed.