What is the difference between bronze and cast iron hydrant valves?

Gunmetal hydrant valves
Gunmetal hydrant valves are firefighting equipment used for large-scale firefighting operations. They are designed to withstand high pressure and have an extremely low corrosion rate. Landing valves are commonly used in conjunction with hydrants and control the flow of fire suppression agents. These valves are used in both onshore and offshore applications and are typically installed on wet high risers in buildings. Hydrant valves can also be pressure regulating or limiting. Both types can handle high pressures of water supply (up to 20 bars) and low pressure (between 4-12 bar).

A high-rise building's head can differ from the bottom to the top, causing a great difference in pressure. Hydrant valves designed to deal with this situation must have different size orifice plates. The size of the orifice plate depends on the level of the building, the level of the hydrant, and the pressure required for running. Stainless steel is a superior choice in this regard because it can withstand high pressure.

Cast iron hydrant valves
There are many benefits of casting iron fire hydrant valves. One of these advantages is that they are corrosion-resistant. These fire hydrants typically receive water from the main street 'T' line. Cast iron valves are used in a variety of different applications. If you are in need of a fire hydrant valve, consider using an EZ Valve. These valves are easy to install, and you will never have to worry about losing water during a fire.

These fire hydrant valves use a stem nut to control the main valve at the bottom of the barrel. Different models utilize a pumper nozzle, or a hose nozzle for smaller applications. Hose nozzles are made of brass and threaded into the top of the cast iron barrel. Pumper nozzles are larger than hose nozzles, but they are easy to replace.