4-way stainless steel manifold with flowmeters, thermostatic valves, drain valves and automatic air vents – SiGMA-Li

Stainless steel 4-way hydraulic manifold SiGMA-Li designed for distribution and balancing of heating or cooling circuits. This manifold integrates individual flowmeters, thermostatic control valves, drain/fill valves and automatic air vents to simplify commissioning, adjustment and routine maintenance. Constructed from corrosion-resistant stainless steel, the unit is intended for use in hydronic systems such as underfloor heating, radiator circuits and multi-zone installations where accurate flow regulation and reliable air removal are required.

Advantages

The manifold provides precise balancing with separate flowmeters for each circuit, enabling visual verification and fine adjustment of flow rates. Thermostatic control valves allow temperature-responsive regulation and contribute to energy-efficient operation. Built-in drain and fill valves facilitate fast installation and servicing without the need to dismantle the assembly. Automatic air vents ensure continuous removal of trapped air, improving system performance and reducing noise.

Suitable for

• Underfloor heating systems requiring individual loop balancing
• Multi-zone hydronic installations with separate control circuits
• Radiator distribution systems where flow measurement and balancing are needed
• Retrofit and new-build projects that demand easy commissioning and low-maintenance operation

Key specifications

• Material: corrosion-resistant stainless steel construction
• Number of outlets: 4 independent circuits with individual flowmeters
• Valves: thermostatic control valves on each circuit for temperature-responsive regulation
• Maintenance features: integrated drain/fill valves for each circuit
• Air management: automatic air vents to remove trapped air from the system
• Connection compatibility: suitable for common hydronic pipework and fittings (verify dimensions with installer)

How to use

Install the manifold in the hydraulic circuit according to project layout and local plumbing standards. Connect supply and return pipes and attach each circuit to its respective outlet. During commissioning, use the individual flowmeters to measure and adjust flow rates for balanced distribution. Use the thermostatic control valves to regulate temperature delivery per circuit. Open the drain/fill valves for safe filling and purging of each loop; operate the automatic air vents to remove trapped air during initial filling and periodic maintenance.

Usage recommendations

For reliable long-term performance, protect the system from aggressive fluids and ensure water quality and inhibitor levels meet manufacturer or project requirements. Commission the manifold with a calibrated flow measurement procedure, bleed air thoroughly using the automatic vents, and schedule periodic inspection of flowmeters and valves to confirm correct operation.