Thin film hydraulic water level control valve (DN80) model: CQ72-H142X-10T-B stock number: M210257

（1） Overview
This product is suitable for automatic water supply systems of various water tanks (pools) and water towers in industrial and mining enterprises and civil buildings, and can be used as a circulating water supply control valve for atmospheric boilers.

（2） Working principle
When the water level in the pool or tower drops and the float valve opens for drainage, there is pressure water in the inlet pipe that lifts the valve disc inside the valve, opens the sealing surface, and the valve opens for water supply; When the water level rises to the control level, the float valve closes, the valve disc moves down and the sealing surface closes, and the valve stops supplying water.

（3） Technical parameters
Usage medium: clean water Usage pressure: 0.05MPa~1MPa Medium temperature: ≤ 60 ℃ Diameter: DN80 Material: copper
Length: 250mm Height: 245mm

（4） Performance characteristics
1. Using hydraulic principles for control, the structure is novel, simple and reasonable.
2. The work is stable and reliable, with flexible opening within the specified pressure range and no water hammer impact.
3. Lightweight and compact in size.
4. Easy installation and maintenance.

（5） Installation form and precautions
Fix this valve horizontally on the inlet pipe (depending on the specific situation, but the hydraulic valve must be installed horizontally), and then connect and tighten the control pipe, globe valve, and float valve onto this valve. The flange connecting the inlet and outlet pipes of this valve is a 1MPa standard flange. The diameter of the inlet pipe should be greater than or equal to the nominal diameter of the valve. The outlet should be lower than the float valve, and the installation of the float valve should be at least one meter away from the water pipe. To prevent siphon backflow, the outlet of the water pipe in the water tank should be higher than the control water level. To prevent noise and water level fluctuations, an energy dissipation cylinder should be installed at the outlet. When in use, the shut-off valve should be open. If two or more valves are installed in the same water tank, they should be kept on the same plane. Due to the closure of the main valve, the float valve will close about 30-50 seconds later, so the water tank should have sufficient free capacity to prevent overflow.
If installed in an underground water tank, an alarm device should be installed in the underground pump room.

（6） Maintenance and upkeep
Before installing this valve, the pipeline should be flushed clean. During use, maintenance should be carried out one to several times a year depending on the water quality. The specific maintenance methods are as follows:
1. Close the gate valve in front of this valve.
2. Remove the control pipe, unscrew the valve cover bolts, and open the valve cover.
3. Remove the valve liner, valve stem, valve disc, and guide cover.
4. Unscrew the diaphragm pressure plate screw, throttle nut, and filter.
5. Remove the upper cover, diaphragm, valve disc, sealing gasket, guide cover, etc.
After disassembly, clean all parts, remove dirt and various impurities, use steel wire to clear the small hole on the throttle nut, clean the filter, etc., and replace damaged seals.
The assembly sequence is opposite to the disassembly sequence.
Thin film hydraulic water level control valve (DN80) model: CQ72-H142X-10T-B stock number: M210257

Thin film hydraulic water level control valve (DN80) model: CQ72-H142X-10T-B stock number: M210257