Resilient seated gate valve for fire

Signal valve, butterfly valve used in the signal applied to the fire sprinkler piping system to monitor the water supply line can be far indicate valve opening. Rising stem gate valve and attached to the opening of the valve is also often used in fire indication system, if the valve mounting position is high off the ground, the general use of rising stem gate valve, the valve opening is clear indication, if installed lower position. You need to attach the valve opening direction