Airline Piggyback Filter Regulators

Piggyback Filter Regulators for Compressed Air Systems

The Pneuforce XOFR Series piggyback filter regulator assemblies combine compressed air filtration and pressure regulation into one compact unit. These are often called piggyback filter regulators because the pressure regulator is built into the top section of the air filter rather than being mounted as a separate inline component.

This stacked piggyback design saves installation space, reduces fittings and simplifies compressed air preparation on pneumatic machinery. The filter removes water droplets, rust particles, dirt and other contaminants from the compressed air supply, while the integrated regulator maintains stable downstream pressure for pneumatic valves, cylinders, actuators and automation equipment.

Download Piggyback Filter Regulator Datasheet

XOFR Piggyback Filter Regulator Features

Combined inline air filter and pressure regulator
Piggyback design with regulator mounted above the filter bowl
Compact modular FRL platform
Reduced installation space compared with separate filter and regulator units
Reliable downstream pressure control
Effective removal of moisture and compressed air contaminants
Can be coupled to XOL airline lubricators using FRL assembly kits
Suitable for standalone use or complete FRL assemblies

What Is a Piggyback Filter Regulator?

A piggyback filter regulator is a combined air preparation device where the pressure regulator sits directly on top of the air filter assembly. Instead of using a separate filter followed by a separate regulator, both functions are integrated into one compact unit.

This makes piggyback filter regulators popular on machines where space is limited, while still providing the two most important compressed air preparation functions: filtration and pressure regulation.

Why Use a Piggyback Filter Regulator?

Compressed air systems require clean air and stable pressure to operate reliably. A piggyback filter regulator removes contamination while maintaining the correct outlet pressure from one compact assembly.

This reduces installation time, minimizes leak points, saves panel space and creates a clean professional compressed air preparation layout.

Expandable to a Complete FRL System

The XOFR Series can be coupled directly to Pneuforce XOL airline lubricators using FRL assembly kits. This allows the piggyback filter regulator to become part of a complete Filter-Regulator-Lubricator system when downstream equipment requires lubrication.

Many modern pneumatic systems do not require lubrication, but where it is needed, the modular XOFR and XOL design provides a simple close-coupled FRL assembly.

Typical Applications

Industrial automation systems
Packaging machinery
Machine tools
Pneumatic cylinders
Directional control valves
Assembly equipment
Material handling systems
OEM machinery
Robotics and cobots
General compressed air systems

Frequently Asked Questions

What is a piggyback filter regulator?

A piggyback filter regulator is a compact air preparation unit where the pressure regulator is built into the top of the air filter assembly. It combines compressed air filtration and pressure regulation in one space-saving device.

Why is it called a piggyback filter regulator?

It is called a piggyback filter regulator because the pressure regulator effectively sits on top of the filter body, creating a stacked design rather than using two separate inline components.

What does a filter regulator do?

A filter regulator removes water, dirt, rust particles and other contaminants from compressed air while also controlling downstream air pressure for pneumatic equipment.

What is the advantage of a piggyback design?

The piggyback design saves installation space, reduces fittings, minimizes potential leak points and creates a compact compressed air preparation assembly.

Can the XOFR be expanded into a complete FRL system?

Yes. The XOFR piggyback filter regulator can be coupled directly to the Pneuforce XOL airline lubricator using FRL assembly kits.

What does FRL stand for?

FRL stands for Filter, Regulator and Lubricator. These components prepare compressed air by removing contaminants, controlling pressure and adding lubrication when required.

Do all pneumatic systems require a lubricator?

No. Many modern pneumatic components operate without lubrication. A lubricator should only be added when the downstream equipment requires lubricated air.

Where are piggyback filter regulators used?

Piggyback filter regulators are commonly used on packaging machinery, automation equipment, machine tools, pneumatic control panels, OEM machinery and general compressed air systems.

How often should the filter element be replaced?

Filter replacement depends on compressed air quality and operating conditions. Elements should be inspected regularly and replaced when contamination or pressure drop becomes excessive.

Can a piggyback filter regulator be used by itself?

Yes. The XOFR can be used as a standalone filter regulator or assembled with a lubricator to create a complete FRL unit.