ACCORDING TO ALL THE INFORMATION I HAVE FOUND, A 24" NRS SPLIT WEDGE GATE VALVE ,150# CLASS VALVE SHOULD OPEN 75 ROUNDS (3X THE VALVE SIZE PLUS 3),I HAVE A H+M GATE VALVE THAT WAS INSTALLED AROUND 1965 THAT ONLY OPENS 51 ROUNDS (2X + 3),I KNOW THAT THE VALVE IS IN GOOD WORKING SHAPE BECAUSE WE JUST PULLED IT APART AND LOOKED AT IT.DOES ANYONE HAVE ANY IDEA WHY THIS VALVE WOULD BE ANY DIFFERENT.
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