Stainless steel 8-way manifold with flow meters, thermostatic valves, drain valves and automatic air vents — SiGMA-Li

Stainless steel 8-way manifold with flow meters, thermostatic valves, drain valves and automatic air vents — SiGMA-Li is a compact hydraulic distribution unit designed for hydronic systems. Manufactured from stainless steel, the manifold provides eight individually controllable circuit outlets with integrated flow meters for precise balancing, thermostatic control valves for temperature regulation, drain valves for easy maintenance and automatic air vents to remove trapped air. It is intended for use in underfloor heating and multi‑zone radiator systems where reliable distribution and simple adjustment are required.

Advantages

The stainless steel construction resists corrosion and extends service life in wet heating environments. Individual flow meters allow accurate balancing of each circuit without disassembly, while thermostatic valves enable temperature control at the manifold level for each zone. Drain valves simplify flushing and maintenance procedures, and integrated automatic air vents reduce noise and improve hydraulic performance by removing air from the circuits. Compact layout and clear meter readouts facilitate installation and commissioning in technical rooms or manifold cabinets.

Suitable for

• Underfloor heating systems with up to eight circuits
• Multi‑zone radiator installations requiring individual circuit control
• Renovation or new construction projects needing a corrosion‑resistant manifold
• Commercial or residential buildings where balanced flow and de‑aeration are important

Key specifications

• Material: stainless steel body and fittings suitable for potable and heating water
• Number of outlets: 8 independently controlled circuits
• Balancing: individual flow meters on each circuit for visual flow control
• Control elements: thermostatic valves integrated per circuit for temperature regulation
• Maintenance features: drain valves for each circuit to enable flushing and emptying
• Air management: automatic air vents incorporated to remove trapped air
• Connection compatibility: standard fittings for connection to typical hydronic piping (check installer requirements)

How to use

Install the manifold according to system design and local plumbing codes, ensuring correct inlet and outlet orientation and secure mounting within the manifold cabinet or technical room. Connect supply and return lines and attach each circuit pipe to the corresponding outlet. Use the built‑in flow meters to set and balance flow rates for each zone by adjusting flow controls until required values are achieved. Fit appropriate thermostatic heads or actuators on the thermostatic valve spindles where automatic room temperature control is needed. Open drain valves when flushing or filling the system and allow automatic air vents to purge air during initial commissioning and periodic bleed cycles.

Usage recommendations

Commission the manifold with a qualified installer: perform a hydraulic test, balance flows using the integrated flow meters, and verify that automatic air vents operate correctly. Regularly inspect for leaks, check flow meter readings and bleed air if noisy operation occurs. Use corrosion‑inhibiting additives only if compatible with stainless steel manifolds and in accordance with system manufacturer guidance.