After posting my earlier effort at the safety valve bonnet, fellow NERA member Tom Burnham pointed out that I had made an error and the the cover should be oval at the top not round. He kindly provided me with the info to put it right.
After posting my earlier effort at the safety valve bonnet, fellow NERA member Tom Burnham pointed out that I had made an error and the the cover should be oval at the top not round. He kindly provided me with the info to put it right.