Modulating or float valves are used in surge tanks or vacuum D.E. filter tanks when the top of the tank is at an elevation above the maximum pool water level. In this type system, the water level in the surge/filter tank will rise to the same level as the pool water level when the system is shut down.
What do modulating float valves regulate?
Modulating float valves are designed to regulate the flow of water in a pool recirculation system. When surges from the gutter drain spikes levels in the surge tank (or surge pit), the modulating float valve (MFV) closes, limiting the return of water coming from the main drain.
How does a modulating float valve work?
The valve closes drip-tight at the maximum level and modulates to maintain the tank level. The float pilot is remotely installed at the high level in the reservoir tank. Movement of the main stem alters the size of the closing restriction, interrupting the tendency of the valve to hunt.
Does a modulating control valve do?
A modulating control valve is an automated valve that is used to control the amount of flow in a system or process. The actuators on these valves use feedback and control signals to accurately open and close the valve.
How does a level control valve work?
Level Control Valves Are used to manage the filling of tanks and vessels by means of a mechanical float that operates a small pilot valve to control the main valve. The main valve allows the liquid (often water) to flow down and impulse line to the pilot valve at the float.
What is a singer valve?
Singer Valve designs and manufactures automatic control valves, offering engineered products for pressure management within water works. It also manufactures similar valves used in industrial, commercial and fire protection applications.
What are modulating controls used for?
Modulating controls are devices that are used to regulate control loops in a process. One plant may have multiple control loops, which all require control valves to monitor and control the process variable of the particular loop.
Where is the modulating control valve located?
dashboard
A modulating control valve allows a driver to gradually apply spring brakes. In equipped vehicles, the valve is controlled by a lever located on the dashboard.
What is altitude valve?
An altitude valve is a pilot-operated valve that opens and closes to fill a high-level tower or tank hydraulically. The valve performs this function by sensing the static level of water in the tower.
How does a singer valve work?
The valve works by using the pressure differential to open or close the diaphragm to meet the pre-determined maximum flow. At the desired maximum flow, the pilot system reacts to small changes in the differential pressure and therefore controls the main valve position by modulating pressure above the diaphragm.
What is the purpose of level control valve?
What type of valve is a control valve?
A control valve is a valve used to control fluid flow by varying the size of the flow passage as directed by a signal from a controller. This enables the direct control of flow rate and the consequential control of process quantities such as pressure, temperature, and liquid level.