Skid-Mounted Metering Pump System

Skid-Mounted Metering Pump System

Skid-mounted metering pump systems have become a core component in modern process industries, especially where high-precision fluid or gas injection is required. These compact and integrated systems are widely used in chemical dosing, fuel gas delivery, additive injection, and water treatment processes. As industrial applications demand increasingly higher levels of accuracy and stability, reliable flow measurement has become fundamental to ensuring consistent output and safe system operation.

Within these systems, the gas rotary flow meter—also known as a gas Roots meter—plays an essential role in measuring gas flow with high repeatability and minimal influence from process fluctuations. ZINACA Instruments provides gas rotary flow meters specifically engineered for skid-mounted installations, offering robust accuracy, excellent durability, and seamless integration with automation systems.

What Is a Skid-Mounted Metering Pump System?

A skid-mounted metering pump system is a modular unit that integrates one or more metering pumps with supporting components such as pipelines, valves, filters, instruments, protective devices, and a control cabinet. All elements are assembled on a steel skid base, allowing the complete system to operate as a plug-and-play module.

Features of Skid Systems

Skid-mounted solutions are valued for their:

•  Compact structure, reducing installation footprint

•  Standardized design, ensuring predictable performance

•  Easy transportation and site deployment

•  High integration level, lowering engineering and installation time

•  Modular expandability, enabling customization for different process needs

These systems are typically used for precise injection of chemicals, additives, catalysts, disinfectants, or fuel gases into pipelines or reaction units. Because dosing accuracy directly affects product quality, reaction efficiency, and operational safety, flow measurement becomes a critical factor.

Typical Applications

Skid-mounted metering pump systems are commonly found in:

•  Chemical dosing units for process lines

•  Natural gas injection skids

•  Petrochemical catalyst and additive metering

•  Fuel gas combustion control

•  Water treatment and disinfection

•  Boiler or burner fuel gas delivery

•  Refinery process conditioning skids

In many of these applications, gas flow—whether air, nitrogen, natural gas, or process gas—must be measured accurately to ensure that the metering pump system delivers the exact amount of material required by the process.

How Does the ZINACA Gas Rotary Flow Meter Apply in Skid-Mounted Metering Pump Systems?

High Accuracy Under Low and Medium Gas Flow Conditions

Gas rotary flow meters operate using a pair of synchronized rotors that trap and deliver gas in precise volume increments. This mechanical volumetric measurement method ensures high accuracy even when the system operates under:

•  Low gas flow rates

•  Pulsation caused by pump strokes

•  Variable load or intermittent injection

•  Fluctuating working conditions

The high repeatability of the meter helps stabilize control feedback and ensures consistent dosing performance.

Reliable Measurement Unaffected by Pressure and Temperature Changes

Compared to thermal or differential pressure meters, gas rotary flow meters maintain accuracy even when process conditions vary.

They are particularly suitable for skid systems that involve:

•  Quick pressure changes from pump start/stop

•  Temperature fluctuations in outdoor installations

•  Compressed air and nitrogen distribution

•  Fuel gas injection at variable demand

This stability is essential for metering pump skids where gas flow directly influences injection volume.

Digital Output for Automation Integration

ZINACA gas rotary flow meters can be equipped with:

•  Pulse output for totalizing systems

•  RS-485 Modbus communication for PLC/DCS integration

•  4–20mA signal converters if required

This allows the meter to connect seamlessly with:

•  Local control panels

•  Pump speed control systems

•  Dosing calculation units

•  Remote monitoring platforms

Such connectivity ensures precise dosage control based on real-time gas consumption data.

Compact and Durable Design Suitable for Skid Structures

Since skid-mounted systems often prioritize space efficiency, instrumentation must be both compact and robust.

ZINACA gas rotary meters use:

•  Aluminum alloy or ductile iron bodies

•  Precision-machined internal rotors

•  Anticorrosion surface treatment

•  Long-life bearings designed for continuous operation

Their compact size and rugged build make them suitable for confined skid layouts, mobile equipment, or harsh operating environments.

Stable Measurement for Multiple Gas Types

ZINACA rotary meters work effectively with: 

•  Natural gas

•  Biogas

•  Air and compressed air

•  Nitrogen

•  Oxygen (special materials optional)

•  Fuel gases for burners

•  Process gases used in chemical dosing

This versatility makes them suitable for multipurpose skid manufacturers serving different industries.

How to Choose a Reliable Gas Rotary Flow Meter for Skid Systems?

When selecting a gas Roots meter for skid-mounted metering pump applications, several key factors must be evaluated:

Flow Range Selection

The meter must match the system’s minimum and maximum operating flow. Undersized meters may overload; oversized meters may produce inaccurate readings at low flow rates.

Pressure Rating and Gas Type

Different gases require different materials and sealing structures. Ensure the meter meets the skid’s:

•  Working pressure

•  Medium compatibility

•  Temperature limits

Output Signal Requirements

Depending on the control architecture, select:

•  Pulse output (high-speed or low-frequency)

•  RS485 Modbus

•  4–20mA converter

Installation Conditions

Skids often have:

•  Limited space

•  Complex piping layouts

•  Vibration from pumps

•  Outdoor exposure

Choosing a compact, robust meter helps ensure long-term stability.

Accuracy Grade

Common accuracy classes include 1.5%, 1.0%, and 0.5%.

Higher accuracy may be required when gas dosage directly affects product quality or reaction balance.

Maintenance and Serviceability

Rotary flow meters are known for low maintenance requirements, but factors such as lubrication, dust protection, and periodic inspection should be considered when designing the skid system.

ZINACA Instruments provides customized configurations to match the exact operating conditions of your skid, ensuring stable performance and long service life.

About ZINACA Instruments

ZINACA Instruments specializes in flow, pressure, temperature, and level measurement solutions for industrial applications. Our product line includes gas rotary flow meters, vortex flow meters, thermal mass flow switches, pressure transmitters, electronic pressure switches, and more.

Our products are widely used in:

•  Chemical process dosing

•  Gas measurement and distribution

•  Petrochemical refineries

•  Water treatment systems

•  Energy and combustion control

•  Skid-mounted pump systems

With certifications including ISO, CNAS, IAF, SIL, and ACM, ZINACA focuses on precision manufacturing, stable performance, and long-term reliability.

We also offer customized OEM services for skid manufacturers seeking high-precision and cost-effective flow measurement solutions.