Solution for the model of the cracking high-pressure check valve
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I have added a check valve at the outlet of the high-pressure feed water pump in my hydrocracking unit. The model specified by the design institute is H89XXW-J101N; I’m not very familiar with this code, so I’m seeking advice from those with more experience. H (check valve) 8 (pressure rating 1500CL) 9 (construction type PS-COVER SWING) X (? ）X（wall thickness XXS）W（butt weld connection）-J1（ASTM A216-WCB）01（STL,STL,13Cr）N(?) – What do the first X and the last N in the valve model represent? I would appreciate it if experienced colleagues could provide some guidance.
The technical description is very clear; there’s no need to worry about the model, as many of the specifications in this model were defined by the design institute itself and are not standard.
N seems to be intended as a color code, indicating what important location or medium this valve is used for