Static mixer elements for gas and liquid blending · SV-type and helical (SK) types, hydraulic diameter, element count and length, flow range by pipe size, viscosity limits, and mixing before reactors
A static mixer element is a fixed insert in a pipe or duct, such as helical blades or other fixed structures, that repeatedly splits, turns and recombines the flow so that gases or liquids blend without moving parts. Ask three things first: what is being mixed (gas-gas, gas-liquid, liquid-liquid) and at what viscosity and flow, which element type and hydraulic diameter suit the duty and any solids, and how much pressure drop and length the line can accept.
Static mixer elements and in-line static mixers for gas blending, gas-liquid contacting and liquid mixing in process lines and ducts, in metal or plastic. Dynamic (agitated) mixers, injection quills, ammonia injection grids and spray nozzles are outside this page except where compared.
Start with your task
01
Omoris lists its SV static mixer elements for turbulent flow, liquid-liquid and gas-gas mixing, immiscible liquid dispersion and gas-liquid contacting, at viscosity up to 10² cP; elements with hydraulic diameter of 3.5 mm or less suit clean media and 5 mm or more media with small amounts of low-viscosity impurities. It gives, for example, SV-2.3/20 (20 mm pipe, 2.3 mm hydraulic diameter, 500 mm long, 25 elements, 0.5–1.2 m³/h), SV-3.5/50 (50 mm, 3.5 mm, 500 mm, 10 elements, 3.5–7 m³/h) and SV-7-30/1200 (1,200 mm, 7–30 mm, 3,500 mm, 3 elements, 1,630–3,260 m³/h), and states dispersion down to 1–2 µm and liquid-liquid non-uniformity of 1–5%. [1]
Its SK elements are helical, described as cost-effective with moderate mixing performance for simple tasks, low pressure drop and high-viscosity fluids in small-diameter turbulent and laminar flow. [2]
Editorial calculation: in a 50 mm line, 3.5–7 m³/h corresponds to about 0.5–1.0 m/s (taking 50 mm as the bore), and 10 elements in 500 mm gives about one pipe diameter per element. Ask the supplier for the pressure drop at your flow, density and viscosity. [1]
Give the supplier the fluids and phases, flow range, viscosity and density, temperature and pressure, solids or fouling, pipe or duct size and length available, allowed pressure drop, required mixing quality, material (stainless, carbon steel, plastic), connections and any injection point upstream.
02
The US EPA Air Pollution Control Cost Manual chapter on selective catalytic reduction (SCR) explains that ammonia must be dispersed and mixed throughout the flue gas before the reactor, that inadequate mixing makes NOx reduction inefficient, and that SCR designs need enough duct length between ammonia injection and the reactor inlet; it lists installation of static mixers upstream of the reactor, more energy in the injected fluids, and more injectors or injection zones as ways to improve mixing, with flow modelling used to optimise the injection system. [3]
Editorial note: for gas blending, give the supplier the duct geometry, injection point and distance to the downstream equipment, and ask for a mixing-quality prediction (for example a coefficient of variation) at the outlet. [3] [1]
03
StaMixCo describes its GV corrugated-plate static mixer for turbulent flow, used for blending low-viscosity liquids and gases, dispersing immiscible liquids and creating gas-liquid dispersions in a short length. Its standard GV elements have 5 corrugated plates across the pipe diameter at a 45° corrugation angle to the pipe axis, and the illustrated unit has 3 mixing elements. The maker says the number of corrugated layers in a given diameter can be varied to change mixing intensity and pressure drop, the corrugation angle can be changed for the same reason, and spacers between elements use the empty-pipe turbulence created downstream of each element at no added pressure-drop penalty. [4] For slurry and sludge, its Model LT non-clogging element has three tapered finger-like blades projecting from the pipe wall at a 45° slope in the flow direction, with no leading edges or crossing blades; long, medium or short middle fingers trade mixing intensity against particle size. [5]
Set these geometry options beside the SV and SK element data and the SCR placement guidance above. [1] [2] [3]
Editorial note: changing corrugation angle or layer count changes both mixing intensity and pressure drop in the maker's description, so ask for the pressure drop at your flow for the exact geometry quoted.
| StaMixCo design point | Published value |
|---|---|
| GV plates per element | 5 corrugated plates across the diameter |
| GV corrugation angle | 45° to the pipe axis (variable) |
| GV adjustments | Layers, angle and spacers set intensity and pressure drop |
| LT blades | 3 tapered blades at 45° in flow direction |
| LT middle finger | Long (small particles, laminar), medium, short (large particles, turbulent) |
For dirty or solids-bearing streams, ask whether the element has crossing blades or leading edges that can catch fibres, and for the particle size the chosen blade geometry can pass.
04
OMORIS, the one maker card here, lists SV, SX, SL and SK elements alongside complete static mixers in metal and plastic bodies.
The suppliers reviewed list SV, helical and other static mixer elements and housings in metal and plastic; ask each for element geometry, hydraulic diameter, pressure-drop data, mixing quality predictions, materials and connection standards.
05
Two rows decide whether the mixer works in place: hydraulic diameter, which Omoris ties to how clean the media are, and the distance from the injection point, which the EPA SCR chapter treats as part of mixing. [1] [3]
| Part | Role | Fix in the order |
|---|---|---|
| Mixing elements | Split and recombine flow. [1] [2] | Type; number. |
| Hydraulic diameter | Channel size; fouling. [1] | Value for media. |
| Housing (pipe or duct) | Contains elements. [2] | Size; flanges. |
| Injection point | Adds second stream. [3] | Position. |
| Mixing length | Distance to use point. [3] | Available length. |
| Material | Corrosion and temperature. [2] | Grade. |
06
Pressure drop and operating temperature carry no published figure here and must come from your line; the other rows give Omoris or StaMixCo examples to check a quotation against.
| Field | What it means and published values | Ask the supplier for |
|---|---|---|
| Pipe Diameter (mm) | E.g. 20–1,200 mm. [1] | Size. |
| Flow Rate (m³/h) | E.g. 0.5–1.2 to 1,630–3,260. [1] | Range. |
| Hydraulic Diameter (mm) | E.g. 2.3–30 mm. [1] | For media. |
| Number of Elements | E.g. 3–25. [1] | Count; length. |
| Viscosity Limit (cP) | E.g. ≤100 cP for SV. [1] | Range. |
| Mixing Quality | E.g. 1–5% non-uniformity. [1] | Prediction method. |
| Pressure Drop (kPa) | Line limit. | At your flow. |
| Material | Metal or plastic. [2] | Grade. |
| Connections | E.g. ANSI 150 lb flanges. [2] | Standard. |
| Operating Temperature (°C) | Process. | Rating. |
| Element geometry | Example: 5 corrugated plates at 45° per GV element; layers and angle variable (StaMixCo). [4] | Plates, angle, element count. |
07
Paste it into your enquiry below or into an email to a maker, then replace every bracket.
Fluids: [gas-gas; gas-liquid; liquid-liquid] Flow: [range; viscosity; density] Conditions: [temperature; pressure; solids] Line: [diameter; length; connections] Limits: [pressure drop; mixing quality] Material: [stainless; carbon steel; plastic] Injection: [point; distance]
OMORIS lists SV, SX, SL and SK static mixer elements and metal and plastic static mixers.
Lists SV, SX, SL and SK static mixer elements and metal and plastic static mixers.
Product scope checked 2026-10-11
Explore company information and manufacturing capabilities, then discuss the scope of your project with a relevant supplier.
Omoris lists its SV elements for turbulent liquid-liquid and gas-gas mixing at low viscosity. [1]
Omoris describes SK helical elements for simple tasks, low pressure drop and high-viscosity fluids. [2]
The EPA SCR manual lists static mixers upstream of the reactor to improve ammonia and flue gas mixing. [3]
StaMixCo offers a Model LT non-clogging element with three tapered blades at 45° from the pipe wall and no crossing blades, for slurry and sludge streams. [5]
Sources checked 2026-10-12. The EPA manual is a US government engineering reference; Omoris describes its own elements.
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