Stainless Steel Hydraulic Separators

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Low loss headers · 4-in-1 · 304 stainless steel

LLH Hydraulic Separators

1" union to 6" ANSI 150 flanged, 11 to 570 GPM

A hydraulic separator, also called a low loss header, decouples the boiler or heat pump loop from the system loops so each pump runs at its own flow. Rhella LLH separators do four jobs in one 304 stainless steel vessel: hydraulic separation, air elimination, dirt separation and magnetic capture of ferrous particles.

1" – 6"Connection sizes
11 – 570GPM
150 psiMax. pressure
2 yearsWarranty
Choose a modelCatalogue (PDF)
Rhella LLH stainless steel hydraulic separators, 1 inch to 6 inch

4-in-1 performance

1

Hydraulic separation

Boiler and system pumps run at their own flow without interfering.

2

Air removal

Stainless baffles or Pall rings coalesce micro-bubbles for the automatic air vent.

3

Dirt removal

Low velocity in the vessel settles dirt to the service drain.

4

Magnetite removal

A removable 12,000 gauss neodymium rod captures ferrous particles (M and P models).

Selection table

ModelConnectionMagnetPall ringsWeight, lbFlow, GPM
LLH1001" MNPT––4.511
LLH100M1" MNPT✓–5.211
LLH100MU1" Union✓–6.011
LLH1251-1/4" MNPT––6.818
LLH125M1-1/4" MNPT✓–7.418
LLH125MU1-1/4" Union✓–8.518
LLH1501-1/2" MNPT––9.626
LLH150M1-1/2" MNPT✓–10.026
LLH150MU1-1/2" Union✓–11.426
LLH200M2" MNPT✓–14.237
LLH200MU2" Union✓–16.837
LLH200PU2" Union✓✓22.637
LLH200PF2" Flange✓✓34.637
LLH250P2-1/2" Flange✓✓60.690
LLH300P3" Flange✓✓86.0145
LLH400P4" Flange✓✓114.0260
LLH600P6" Flange✓✓216.0570

Union tailpieces: press, sweat or FNPT, specified at ordering. Flanges: ANSI B16.5 Class 150.

Sizing and installation

Size the separator to the larger of the primary or secondary flow rate, not the pipe size.

The side connection is the point of no pressure change: connect the expansion tank and system fill there. No separate fill tee is needed, which removes leak points from the boiler room.

Pair 1-1/4" to 2" models with Rhella stainless steel hydronic headers. For a single pump circuit, use an air and dirt separator instead.

Technical data

Body304 stainless steel
Air separationStainless baffles (1"–2"), Pall rings (P models)
MagnetM50 neodymium rod, 12,000 gauss
Max. pressure150 psi (10 bar)
Temperature32 – 210 °F (0 – 99 °C)
FluidsWater, max. 50% glycol
ConnectionsMNPT, union, or ANSI B16.5 Class 150 flanges
Warranty2 years

Tools and downloads

Flow simulatorsMixing and temperatures for LLH100MU, LLH125MU, LLH150MU, LLH200MU, LLH250P, LLH300P, LLH400P, LLH600P Product catalogueAll models, PDF Sizing help+1 905-904-2772 · [email protected]