The Model FP 450-80 Level Control Valve is a hydraulically controlled, diaphragm actuated, control valve that shuts at pre-set reservoir high level and fully opens in response to an approximately one-meter (three-foot) level drop, as sensed by the 3-way altitude pilot mounted on the main valve.

Features and Benefits

• Line pressure driven – Independent operation
• Bi-level altitude pilot
• No float, simple installation
• On/Off service
• Suitable for low quality water
• Fully supported vulcanized diaphragm
• Rugged radial seal disk
• Protected diaphragm
• Dynamically restrained actuation
• Non-slam closing
• Balanced rolling-diaphragm
• High flow capacity
• Very low opening & closing ΔP requirement
• External installation
• Easy access to valve
• Easy level setting
• Less wear and tear
• In-line serviceable – Easy maintenance
• Flexible design – Easy addition of features

Typical Applications

• Bi-Level Water Towers
• The Model FP 450-80 senses the static head of the water level in the tank by means of a high sensitivity pilot. To do so accurately, the sensing tube end must be connected to a “still point” at the bottom of the tank. The drainage pipe provides this “still point”, a location not influenced by flow velocity as in filling and outflow pipes.

Operation

The Model FP 450-80 Level Control Valve is a hydraulically controlled, diaphragm actuated, control valve that shuts off at pre-set reservoir high level and fully opens in response to an approximately one-meter (three foot) level drop, as sensed by the 3-Way altitude pilot mounted on the main valve.