Flanged shut-off and balancing valve - EKOFLUX S series - DN 125; Kvs 268.4m3/h BRA.EKOFLUX S

Product detailed description

Flanged shut-off and balancing valves are essential components in central heating and HVAC systems. They are commonly used in commercial and industrial buildings for regulating and balancing fluid flow in heating circuits. Installers and service technicians encounter these valves in applications such as district heating, large-scale ventilation systems, and industrial process water circuits. These valves ensure precise control over flow rates and maintain system balance, especially in complex multi-loop systems.

Correct sizing and selection of the valve are crucial to ensure efficient system performance and longevity. The valve must match the hydraulic requirements of the circuit to avoid overloading the pump or creating excessive pressure drops. It should also be compatible with the working medium and temperature conditions of the system.

Technical parameters

Installation and connection

Before installation, verify that the flange dimensions and bolt holes match those of the piping system. The valve is connected using flanges conforming to EN 1092-1 standards. Ensure the sealing surface is clean and free of debris. Tighten the bolts evenly in a star pattern to prevent warping of the flange faces. Incorrect tightening or misalignment can lead to leaks or premature wear of the gasket.

Common installation errors include using incorrect gasket materials or failing to align the flanges properly. Always refer to the manufacturer’s guidelines for torque specifications and alignment procedures. The valve should be installed in a position that allows easy access for adjustment and maintenance.

Compatibility and accessories

This valve is compatible with HVAC systems operating within the specified temperature and pressure ranges. It is designed to work with water or glycol-based fluids containing up to 50% glycol. Additional components such as pressure gauges, flow meters, and control actuators may be required depending on the system configuration. No alternative or related products are listed for this model.

Technical background for designers

The EKOFLUX S valve operates by rotating a disc or gate to open or close the flow path. The body is made of cast iron (EN GJL 250), which provides high mechanical strength and resistance to thermal expansion. The stem is constructed from brass (CuZn40Pb2) and sealed with EPDM, ensuring reliable sealing even under varying temperature conditions. The non-lifting stem design prevents leakage along the stem during operation.

The valve integrates into the system via standard flanged connections and is suitable for use in closed-loop systems with balanced flow requirements. The service life and efficiency depend on proper installation, correct sizing, and regular inspection for signs of wear or corrosion. Avoid using the valve with steam or hydrocarbon-based fluids, as these can cause damage to the EPDM sealing material and internal components.

Service and operation

During operation, check for signs of leakage around the flange and stem seal. If the valve becomes difficult to turn, it may indicate internal fouling or wear of the sealing surfaces. Clean the valve externally and inspect the stem and seating area for deposits. No specific service intervals are provided in the technical data, but regular visual inspections are recommended to ensure continued performance.

Ensure the valve is fully open during normal operation to prevent unnecessary pressure drops. If used for balancing, adjust the valve according to the system's flow requirements using a calibrated tool. Never operate the valve beyond its maximum temperature or pressure limits, as this can compromise the integrity of the sealing materials and body.

Frequently asked questions

Can the EKOFLUX S DN 125 be used in a system with glycol-based fluid?
Yes, the valve is suitable for water with up to 50% glycol content. The EPDM sealing material is compatible with glycol solutions.

Is the valve suitable for steam applications?
No, the valve is not suitable for steam or hydrocarbon-based fluids. The EPDM seal may degrade when exposed to steam or oils.

Can the valve be used in a system with a maximum operating temperature of 140°C?
Yes, the valve is rated for continuous operation up to +140°C, making it suitable for high-temperature heating and HVAC applications.

Can the EKOFLUX S DN 125 be used with an actuator for automated control?
Yes, the valve can be connected to an actuator for automated control. Ensure the actuator is compatible with the valve's stem design and torque requirements.