ABB 1330L Integral Orifice Flow Element

Overview

The ABB 1330L Integral Orifice Flow Element is a specialized differential pressure (DP) primary element engineered explicitly for the accurate flow measurement of liquids, gases, and steam in extremely small-diameter pipelines. While standard orifice flange assemblies are suited for large industrial mains, the 1330L fills the critical gap for micro-flow and pilot-plant applications. As a premier supplier of advanced industrial instrumentation, Seven Star LLC proudly distributes the complete ABB measurement portfolio to research facilities, chemical dosing plants, and petrochemical laboratories across the Sultanate of Oman and the wider GCC region.

Designed for unparalleled ease of installation, the 1330L is structured to be close-coupled directly to an ABB differential pressure transmitter. This “integral” design eliminates the need for complex, leak-prone impulse piping, significantly reducing installation time and mitigating the risk of freezing or blockages in the sensing lines. The result is a highly compact, robust, and exceptionally responsive flowmeter assembly tailored for critical low-flow environments.

Measurement Principle

Like its larger industrial counterparts, the 1330L operates on the proven Bernoulli principle of differential pressure. As the fluid passes through the precision-machined bore of the integral orifice plate, its velocity increases, creating a localized drop in static pressure. This differential pressure is directly proportional to the square of the volumetric flow rate.

Because the 1330L is close-coupled, the high and low-pressure ports on the element align perfectly with the standard 2-1/8 inch center-to-center connections of modern DP transmitters. The transmitter instantly calculates the flow rate based on the pressure drop across the internal plate. When ordered with a specialized calibration report from the ABB Flow Laboratory, this compact element can achieve a remarkable systemic flow accuracy of ±0.5% of the actual flow rate.

Engineering Design & Flexibility

The physical architecture of the ABB 1330L prioritizes adaptability and long-term serviceability. The unit is available for standard small pipe diameters, specifically 1/2-inch, 1-inch, and 1-1/2-inch lines. Customers can specify the process connections as either internal NPT threaded ends for rapid integration into pilot skids, or flanged pipe runs for permanent, high-pressure industrial installations.

One of the most valuable engineering features of the 1330L is its field-replaceable orifice plate. If the process parameters (such as flow range or fluid density) change after installation, technicians can easily unbolt the assembly and swap the internal orifice plate for one with a different bore size, without needing to replace the entire flow element or transmitter body. For critical high-purity applications, the assembly can also be ordered with specialized degreasing and cleaning procedures specifically certified for oxygen service.

Key Features

• Optimized specifically for highly accurate flow measurement in small pipelines (1/2″, 1″, and 1-1/2″ sizes).
• Integral design allowing direct, close-coupled mounting to standard DP transmitters (2-1/8″ centers), eliminating external impulse piping.
• Exceptional measurement accuracy of ±0.5% of actual flow when factory-calibrated at the ABB Flow Laboratory.
• Field-replaceable orifice plates enabling rapid bore size changes to accommodate evolving process flow ranges.
• Available with robust internal NPT threaded connections or heavy-duty flanged pipe runs.
• Optional specialized factory cleaning and certification available for safe use in pure oxygen service.
• Supports remote transmitter mounting via optional adapter kits for high-temperature or inaccessible piping networks.

Industrial Applications

The compact footprint and high precision of the ABB 1330L Integral Orifice Flow Element make it indispensable in environments where every drop counts. In the petrochemical and refining sectors of Oman, these elements are heavily utilized in additive dosing systems, where tiny volumes of expensive chemical inhibitors must be injected into main pipelines with absolute accuracy.

Furthermore, research and development laboratories, pilot-scale desalination plants, and specialized pharmaceutical manufacturing facilities rely on the 1330L for continuous monitoring of carrier gases and ultra-pure water. The ability to specify oxygen-clean assemblies also makes it a preferred choice for medical gas production facilities. Seven Star LLC supports these highly specialized applications with expert sizing consultation and dedicated procurement services.

Sizing and Selection Guidance

Correct bore sizing on the 1330L depends on the expected minimum and maximum flow rate, the fluid’s density and viscosity, and the differential pressure range the paired transmitter is configured for – getting this wrong either starves the transmitter of a usable signal at low flow or drives an excessive, energy-wasting pressure drop at high flow. Seven Star LLC’s engineers calculate the correct orifice bore using the same beta-ratio methodology ABB’s own flow laboratory applies, ensuring the delivered element matches the customer’s actual process conditions rather than a generic stock configuration.

Because the orifice plate is field-replaceable, a facility that later changes its process flow range, dosing rate, or fluid can re-bore or swap the plate without procuring an entirely new flow element or disturbing the transmitter mounting, protecting the initial instrumentation investment as the process evolves. This is particularly valuable in pilot-plant and R&D settings, where flow conditions are more likely to change between test campaigns than in a fixed industrial process line.

Technical Specifications

Request a Quote for ABB 1330L Integral Orifice Flow Element

To perform precise bore sizing for your application, request a formal quotation, or download the comprehensive DS/1330L technical datasheet for the ABB 1330L Integral Orifice Flow Element, please consult the instrumentation specialists at Seven Star LLC today. As a premier supplier of advanced flow measurement technologies in Oman and the GCC, our engineering team is ready to assist you in designing the optimal low-flow DP measurement loop.

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