What does each letter and digit in the globe valve model J61Y-200I represent?

J61Y-200I J shut-off valve, 6 butt-welded connections, 1 straight-through type, Y cemented carbide sealing surface; 200 denotes a nominal pressure of 20 MPa, and I refers to the material of the valve body

What does each letter and digit in the globe valve model P.J51G-20 represent?

J globe valve, 6 weld-connected, 1 straight-through type, Y cemented carbide sealing surface; 200 denotes a nominal pressure class of 20 MPA, I refers to (some kind of) valve body material

J globe valve, 6 weld-connected, 1 straight-through type, Y cemented carbide sealing surface; 200 denotes a nominal pressure of 20 MPa, I refers to the (CrMo) material of the valve body

1) Globe valve category code: J denotes a globe valve； 2) Shut-off valve actuation method: Manual (no code), 5 – bevel gear, 6 – pneumatic, 9 – electric ； 3) Connection method of the stop valve: 4 flange connections, 6 weldings ； 4) Structure types of stop valves: 1 straight-through type, 2 Z-type straight-through, 3 three-way, 4 corner type, 5 Y-type straight-through, 6 balanced straight-through type, 7 balanced corner type, 8 needle type ； 5) Seal material for stop valves: F – fluororubber, H – stainless steel, N – nylon plastic, Y – cemented carbide, M – Monel alloy, W – the valve body is machined directly ； 6) Nominal pressure of the globe valve: 200 indicates a pressure of 20 Mpa, which is equivalent to 200 kilograms. 7) Material of the globe valve body: A – titanium alloy; C – carbon steel; I – chromium-molybdenum steel; P – stainless steel 304; R – stainless steel 316.

That best answer is wrong. J61Y – the transmission method is omitted here; the number 6 refers to the connection method, which in this case is welding