Essex valve

Hey Tim new to page , doing some research on Google and discovered a old post where u had helped a guy with a old essex valve . I have to very old wil McLain boilers both have zero legible tags on them , I was able to make out the tags to best of my ability on the two gas valves in boiler , problem is they will not react to adjustment and need replaced , I would retrofit them but I have no idea what the btu input is with no info on boiler or valve , the first valve is solenoid/pilot valve essex sx243ap , 243-110800-200, cust no 511044-22
Second is regulator solenoid valve sx243m-14
That m may be h hard to read ,24311082-235 also best to my ability reading .
My main question is would u happen to know what the btu rating on these were ? Pics also attached below in case that helps. Thanks