They are suitable for use with all foam concentrate types with either salt or fresh water. When using air aspirating foam nozzles the monitor is provided with a gas spring counterbalance assembly, with weather protection bellows, to offset the weight of the nozzle. Type Monitors are in active service from the Arctic Circle to the tropics and are well suited for marine applications. Features Cast brass construction for excellent corrosion resistance. Integrally cast straightner vanes in each elbow section to reduce waterway turbulence and friction loss.
Swivel joints are ball bearing type equipped with O-ring seals to prevent water leakage.
Monitor is designed to eliminate effects of nozzle thrust reaction. Full 360 continuous rotation. Angle of elevation is infinitely adjustable from 45 below horizontal to 90 above horizontal. Gas spring counterbalance to offset weight of air aspirating type foam nozzles. The MMB-4 manually operated brass monitors are commonly used for protection of flammable liquid storage tanks, dikes and loading racks.