Description: mean flow rate through the valve seat under specified working conditions; Name: valve seat speed
Description: mean velocity of the flow through the valve seat at the specified operating conditions; Name: valve seat velocity
Description: norm/stipulation describing the explosion protection. The explosion protection type, the device category, the temperature class as well as the device / explosion group are taken from this norm. The type and number of the norm/stipulation with issue year and issue month must be given; Name: Reference norm of the explosion protection