Hydraulic separator Termojet flanged in thermal insulation with base HS-31F

Hydraulic separator HS-31F is a flanged low-loss header (hydraulic separator, thermo-hydraulic distributor) of the Termojet Mega series, supplied in thermal insulation and with a base for floor mounting. A body of 270 mm diameter and a maximum flow of Gmax 39.7 m³/h cover a boiler room of up to 450 kW at ΔT=10 °C and up to 920 kW at ΔT=20 °C. All four branches are flanged DN 80 (GOST 12820-80, PN16), so the unit connects straight to the pipework without adapters.

How it works: the hydraulic separator creates a zone of low pressure loss between the primary circuit (boiler or cascade) and the secondary consumer circuits. When the flow rates differ, the surplus or shortfall of water passes through the separator body — boiler pumps and consumer pumps stop competing for flow, and the boiler settles into its design regime. At the same time the unit cleans the system: dissolved gases and microbubbles rise to the top and leave through the air vent, while sludge settles in the lower part of the body and is drained through the drain valve. The insulation removes heat losses in the boiler room and prevents condensation on the body.

Applications: industrial and commercial boiler rooms, boiler cascades, heat substations, systems with many pump circuits. The flanged version is chosen where the pipework is already built on flanges and a demountable joint is needed for servicing without cutting pipes. If the site uses Grinnell grooved couplings, the same body is available as HS-31 of the Termojet Mega series. Neighbouring sizes — HS-32F.

Advantages of the HS-31F hydraulic separator:

• DN 80 flanges directly on the body — no flange adapter kit needed, the joint is demountable from the start;
• hydraulic separation, air venting and sludge settling in a single body;
• insulation and base included — the unit stands on the boiler room floor without supports and without extra lagging;
• steel body of our own production in Ukraine, manufacturer’s warranty.

Technical data: maximum flow Gmax 39.7 m³/h, output 450 kW at ΔT=10 °C and 920 kW at ΔT=20 °C, flanged DN 80 connection (flange outside diameter 195 mm), body diameter 270 mm, centre-to-centre distance of the branches 500 mm, height with base 1200 mm, width across the flanges 670 mm, depth 350 mm.

What it is installed with. To connect the separator to a distribution manifold, use the KCH80/150 kit from the Termojet Mega series — the distribution manifolds themselves are there too, for the required number of circuits. Each circuit downstream of the manifold is easiest to assemble from ready-made Termojet pump groups. If the system water is dirty or the circuit carries a lot of air, add air and dirt separators alongside: the low-loss header removes the bulk of gas and sludge, and the separator polishes the water. For heat pump installations see Termojet heat pumps. Smaller threaded sizes are in the Termojet hydraulic separators catalogue.

Frequently asked questions

How does HS-31F differ from HS-31 of the Mega series?
The body, insulation and hydraulics are identical: the same 39.7 m³/h flow, the same 270 mm diameter and 500 mm centre distance. The only difference is the branches: HS-31F has DN 80 flanges, HS-31 has Grinnell grooved ends.

What size of boiler room does HS-31F cover?
Up to 450 kW at the standard ΔT=10 °C and up to 920 kW at ΔT=20 °C — the level of a cascade boiler room or a commercial heat substation. The limit is set by the maximum flow of 39.7 m³/h.