with bulges 200 and 12 bolt holes2400 present seal with bulges 150 and 10 bolt holes2800 present seal with bulges 260 and 10 bolt holes3600 present seal with bulges 350 and 10 bolt holes______________________________________ from the above tests it will be noted that when a valve is tested at 150 pounds per square inch gauge psig and utilizing the annular seal of application ser no 798 686 it requires 4500 torque inch pounds to be applied to the stem operating means to prevent any leaks but when utilizing the annular seal member of the present invention with the two bulges thereon and the same number of bolt holes it requires only 3600 torque inch pounds to make an adequate seal further by reducing the number of bolt holes in the annular seal so that no bolt hole is in the area of the two bulges the torque required to provide an adequate seal drops off even further to 2400 inch pounds by reducing the torque required to adequately close the valve less damage results to the annular seal member over a period of use of the gate valve structure referring to fig2 and 4 it will be noted that the lower.