Hi Prakash, Orifice At Boiler MSV Outlet
This orifice is normally first installed by boiler manufacturer and serves as part of steam flow measuring device. Boiler manufacturer will certain make sure it can take up the rated boiler generating capacity. As an measurement device, it will not affect fuel balance and boiler thermal efficiency. If there is any effect, it probably resulted a pressure drop between steam drum and superheater header, which is good to ensure non of superheater tubes starved for steam and eliminate overheating.
However, recommended pressure dropped across steam drum to superheater header is about 1 bar or 10 - 15 psi, if it is above this limit do seek advice / assistance from boiler manufacturer. Thanks.
Hi Prakash, Orifice At Boiler MSV Outlet This orifice is normally first installed by boiler manufacturer and serves as part of steam flow measuring device. Boiler manufacturer will certain make sure it can take up the rated boiler generating capacity. As an measurement device, it will not affect fuel balance and boiler thermal efficiency. If there is any effect, it probably resulted a pressure drop between steam drum and superheater header, which is good to ensure non of superheater tubes starved for steam and eliminate overheating. However, recommended pressure dropped across steam drum to superheater header is about 1 bar or 10 - 15 psi, if it is above this limit do seek advice / assistance from boiler manufacturer. Thanks.