Hydraulic Safety

Hydraulic Water Level Control Valve (F745X)

F745X Hydraulic Water Level Control Valve automatically maintains a preset water level in reservoirs, water tanks, and water towers. It prevents overflow or extremely low water levels using advanced hydraulic pilot control.

Key Features

Driven entirely by pipeline pressure, no external electric power required
Smooth, slow-closing mechanism prevents destructive water hammer
Accurate level control, highly reliable float pilot system
Corrosion-resistant copper/stainless steel pilot piping

Technical Specifications

Nominal Diameter: DN50 - DN400
Working Pressure: 1.0 MPa / 1.6 MPa
Body Material: Ductile Iron / Cast Steel
Pilot Piping: Stainless Steel / Copper
Pilot Valve: Brass float pilot

Parts & Materials List

Main Valve Body: Ductile Iron (QT450-10)
Diaphragm Assembly: Nylon Reinforced EPDM Rubber
Stem & Spring: Stainless Steel 304
Float Pilot Valve: Solid Brass Alloy
Needle & Ball Valves: Stainless Steel / Brass

Applications

Water reservoir level control
Pressure management in water networks
Drinking water backflow protection
Pump suction protection

Quality & Testing

Function and pressure tests per applicable standards; diaphragm and seal assemblies tested for durability.

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Frequently Asked Questions

Do hydraulic control valves require electrical power?

Most hydraulic control valves (e.g. F745X level control, 500X pressure reducing) are fully self-operated by pipeline pressure and require no external power. Solenoid-controlled models such as GKZF-1 use AC220V or DC24V.

What is the pressure adjustment range of the 500X valve?

The 500X pressure reducing valve adjusts downstream pressure from 0.1 MPa to 1.6 MPa and works with inlet pressures up to the nominal rating (PN10/PN16/PN25).

What materials are used for potable water applications?

For drinking water networks, models such as the HS41X backflow preventer use ductile iron bodies with EPDM seals and stainless steel internals, compliant with GB/T17219 sanitary requirements.

How is water hammer prevented in hydraulic valves?

Pilot-controlled valves close smoothly and slowly, which avoids sudden pressure surges. Needle valves allow adjustment of the closing speed to match the specific pipeline conditions.