impact

The impact test on the sizes /2″1 to 2″ is done according to the standard, it is hit from three sides of the valve, and the amount of this hit is a fixed value of 28 N.M for all sizes. The blow should be hit in a single blow and exactly in three directions on the surface of the axis of the valve stem on the body. The weight of the pendulum hammer and the weight of the pendulum rod, as well as the angle of the pendulum at the moment of release relative to the vertical position, are very important in determining the impact force. Therefore, mass measurements and calculations related to determining the angle of the pendulum must be done carefully.