According to difference temperature of inlet steam, PRDS was usually classified as bellow:
Middle pressure and temperature PRDS:
Inlet Steam Pressure: P1≤3.82 MPa, Inlet Steam Temperature: T1≤450 DegreeC
Intermediate pressure and temperature PRDS:
Inlet Steam Pressure: P1≤5.4 MPa, Inlet Steam Temperature: ≤485 DegreeC
High pressure and temperature PRDS:
Inlet Steam Pressure: P1≤10 MPa, Inlet Steam Temperature: ≤540 DegreeC
About steam flow range Q, usually between of 30%~100% is best for operation and performance.
About material of PRDS, is usually selected as bellow:
1.For Middle pressure and temperature PRDS, T1≤450 DegreeC, Pressure Reducing Valve assembling: WCB, Pipe: 20G (A106B).
2.For Intermediate pressure and temperature PRDS, T1≤485 DegreeC, Pressure Reducing Valve assembling: ZG15CrMo(WC6), Pipe: 15CrMo (P11).
3.For High pressure and temperature PRDS, T1≤540 DegreeC, Pressure Reducing Valve assembling: ZG15Cr1Mo1V,(WC6, WC9), Pipe: 12Cr1MoV(P11, P91).
4.For Water supply valve and assembling, usually apply with 25# (A106B) or stainless steel. For water supply pipe, usually apply with 20G (A106B).
Pressure reducing desuperheater system (PRDS) is a steam heating transformation system which is widely used for modern industires like power plant, chemical, textile, heating supply and so on. Steam PRDS's function as steam conditioning services for reduction of pressure and temperature of steam, so that the steam from PRDS is able to meet the requirement of steam used steam equipment. Therefore, PRDS always plays an very crucial role in all system operation.
){kind=link}