Manually Operated Copper Alloy and Stainless Steel Ball Valves for Potable Water Supply in Buildings, Tests and Requirements EN 13828 / Test Equipment
6 Performance requirements 6.1 Operating torque The measured operating torque shall not exceed the values given in Table 7. The torque required for the preliminary cycle shall not be greater than 1,5 times for valves up to DN 15 and 2,5 times for DN 20 up to DN 100 of the values given in Table…