ZTMX Triple Action Static Mixer

Triple Action Mixing

The ZTMX consists of an array of optimally designed mixing elements inside a flanged spool section. Each element splits the flow into two streams at different angles, producing cross-current mixing. The voids behind each element create additional back-mixing vortices, so in effect three stages of mixing interact simultaneously — hence "triple action."

Every ZTMX is built to order. We calculate the number of elements and spool length to achieve an acceptable mixing-to-energy ratio for your specific application. Too little mixing gives unrepresentative samples; too much wastes pump energy and increases wear. We engineer the right balance for your flow conditions.

Configurable Metering Spool

The ZTMX can be supplied as a complete metering spool with integrated injection and measurement connections. Chemical injection ports are fitted upstream of the mixing elements, ensuring thorough dispersion of corrosion inhibitors, demulsifiers, or other treatment chemicals before they reach downstream instrumentation.

Downstream of the mixer, the spool can be fitted with meter ports for water cut analyzers, sample probes, and temperature or pressure transmitters — positioned at the optimal distance from the mixing elements where flow homogeneity is at its best. Sampling ports are located in compliance with API MPMS Chapter 8.2 and ISO 3171, typically 2–4 pipe diameters downstream, to achieve representative samples.

This single-spool approach eliminates the need for separate pipe sections, reducing installation cost and ensuring correct spacing between injection, mixing, and measurement points.

ZTMX Metering Spool with injection and meter ports

Product Benefits

Effective Water Distribution

In multi-phase flow, water settles to the bottom of the pipe while oil flows above. The ZTMX forces the heavier phase upward into the flow stream and distributes it evenly across the full pipe cross-section, enabling accurate sampling and metering.

Flow Straightening

A downstream flow straightening section removes residual swirl and axial forces after the mixing elements. This prevents centripetal effects from throwing the dispersed phase back to the pipe wall before it reaches the sample or measurement point.

Low Pressure Drop

The element geometry is designed to achieve the required mixing coefficient of variation (CoV) with the lowest possible energy loss. Pressure drop is calculated per project and is typically in the range of 0.1–0.5 bar.

Zero Maintenance

No moving parts, no power supply, no consumables. The ZTMX is a completely passive device that operates indefinitely without intervention.

Integrated with ZT-100

The ZTMX can be combined with our ZT-100 water cut analyzer in a single spool assembly, providing both mixing and measurement in one compact installation.

Full Fabrication Capability

Our production facility is fully qualified for welding procedures with certifications, NDT, and custom coatings. We can meet any piping specification requirement.

Technical Specifications

Pipe Sizes	¾" to 48" (custom sizes available)
Flange Ratings	ANSI 150, 300, 600, 900
End Connections	Weld neck flanges (RF or RTJ), butt weld prep ends, NPT threaded
Body Material	Carbon Steel (all grades), 316L SS, Duplex SS, low-temp CS (SA-333 Gr.6), killed CS
Element Material	316L Stainless Steel standard; exotic alloys on request
Pipe Schedule	Per customer specification or applicable design code (ASME B31.3 default)
Design Pressure	Per flange class rating
Design Temperature	−29°C to +200°C
Mixing Effectiveness	CoV ≤ 5% at recommended flow conditions
Pressure Drop	Calculated per project (typically 0.1–0.5 bar)
Spool Length	3D to 5D depending on pipe size, number of elements, and configuration
Optional Ports	Sample probe connections (flanged or NPT), chemical injection ports, instrument ports
Standards	ISO 3171, API MPMS Chapter 8, ASME B31.3

Online Sizing Tool: Try the ZTMX Dispersion Calculator to evaluate mixing quality for your application. ISO 3171 Annex A method with 16 crude oil profiles, pressure drop estimation, droplet size prediction, and multi-temperature flow analysis charts.

Typical Applications

Custody Transfer & LACT

Ensuring water and bottom sediment (BS&W) is homogeneously distributed across the pipe for accurate fiscal sampling and metering at custody transfer points.

Water Cut Measurement

Conditioning flow upstream of water cut analyzers so the instrument sees a representative cross-section rather than stratified layers.

Chemical Injection

Dispersion of demulsifiers, corrosion inhibitors, and other treatment chemicals injected into crude oil, condensate, or produced water streams.

Metering Skids

Pre-installed in metering skid fabrication for compact, proven mixing performance in modular packages for onshore and offshore installations.

How We Build Your Mixer

Every ZTMX is custom-engineered and built to order. Here is how we go from your requirements to a delivered, ready-to-install spool.

Share Your Requirements

Tell us your pipe size, flow rate, fluid properties, pressure class, and any specific port or connection requirements. Submit a quote request or contact our engineering team directly.

Engineering & Quotation

Our engineers calculate the optimal number of mixing elements, spool length, and expected pressure drop for your conditions. You receive a detailed quotation with a dimensional drawing for review.

Design Approval

Review the drawing and specifications. We refine the design until it meets your exact requirements — including materials, coatings, NDT, and documentation.