Float valve HM-C-GAL

Overview
The Hydromodul-C is a modulating float control valve designed to maintain a constant reservoir level automatically via a tank-mounted GAL modulating float pilot. The valve modulates progressively to keep water level within set limits.

Working conditions

• Automatic level control using a tank-mounted GAL modulating float pilot.
• Valve opens gradually when reservoir level falls below the set threshold.
• Upstream pressure must remain above 1 bar for reliable operation.

Installation

• Prepare pipeline leaving correct distance between flanges, threaded or grooved connections.
• Clean the pipeline to prevent foreign materials entering the valve.
• Install the valve with the body arrow aligned to the direction of water flow.
• Do not weld on the pipe near the valve to avoid diaphragm damage.
• Install the float pilot near the reservoir manhole in still water or inside the tank.
• Set and fix the float position on the reservoir wall or other stable support, ensuring correct orientation.
• Anchor the float arm by tightening the arm base screws.
• Connect the float pilot to the main valve following the manufacturer's schematic.

Operation

• Verify all connections between the float pilot and main valve follow the manufacturer's diagram.
• Open the on/off valves N°2 and N°6 of the hydraulic circuit.
• Ensure upstream pressure does not drop below 1 bar, otherwise the valve may not operate correctly.
• Fill the pipeline and reservoir while the float pilot is in its lower position; monitor valve opening.
• When the reservoir is full, verify correct pilot operation and valve closing.
• The hydraulic circuit includes a needle valve to regulate opening speed; tampering may damage the valve and void warranty.
• If trapped air affects operation during start-up, manually move the float arm to upper and lower positions while venting air at the highest points of the control circuit, then retighten fittings.

Hydraulic circuit

• 1 – Valve body
• 2 – Upstream ball valve
• 3 – Upstream pressure gauge port
• 4 – Y filter
• 5 – Needle valve
• 6 – Closing ball valve
• 7 – GAL modulating float pilot
• X – Discharge

Technical specifications

• Product type: Modulating float control valve (Hydromodul-C).
• Pilot: GAL modulating float pilot, tank-mounted.
• Main function: Automatic reservoir level maintenance via gradual valve modulation.
• Installation direction: Body arrow must match water flow direction.
• Control components: Upstream ball valve, pressure gauge port, Y filter, needle valve (controls opening speed), closing ball valve and float pilot.
• Operational constraint: Upstream pressure must not fall below 1 bar for correct operation.
• Commissioning: Bleeding trapped air from the control circuit may be required following the described procedure.
• Warnings: Do not weld near the valve; do not tamper with the needle valve (warranty risk).

Documentation

• Technical datasheet: HM-C-GAL-ITA_ENG-v02.pdf (1.47 MB) - https://tecnidro.com/wp-content/uploads/2023/11/HM-C-GAL-ITA_ENG-v02.pdf