A Specification:DN65-DN250 B Brief introduction to the product:   F-502 non-rising stem cast iron gate valve meets the requirements of MSS-SP-70-Type1,and is mainly featured by non-rising stem,and valve cap connection with bolts.The product has opening/closing indication,bronze embedded parts,and integral valve plate. C Pressure and temperature   Working pressure of steam:0.875MPa   temperature:178 º C   Working pressure of water,oil,gas:1.4MPa D Materials   Valve body/valve cap/valve disc:Cast iron Valve stem:Forged brass   Valve seat:Bronze