ROSS Controls Filters Adsorbing MD3 Series Ports 3/8 to 3/4; Flow to 165 scfm: Installation & Operating Instructions

Overview

The ROSS Controls Filters Adsorbing MD3 Series Ports 3/8 to 3/4; Flow to 165 scfm is a premium-quality air preparation product engineered for reliable performance in industrial compressed air systems. Designed to remove particulate contamination and moisture before air reaches critical downstream equipment, this filter series delivers the performance, durability, and serviceability that ROSS Controls has delivered to industry for over 100 years since its founding in 1921.

The modular design allows integration into standard air preparation panels alongside compatible ROSS filters and lubricators. Modular clamp connections (R-A118-105 or R-A118-105M) enable secure assembly; torque clamp screws to 30–40 in-lbs. ROSS filters are backed by readily available replacement parts and ROSS's global distributor network.

All ROSS air preparation products are manufactured to strict quality standards. The Filters Adsorbing MD3 Series Ports 3/8 to 3/4; Flow to 165 scfm is designed to provide long service life with minimal maintenance when properly installed and supplied with clean, dry compressed air. Consult ROSS Controls at 1-800-GET-ROSS or www.rosscontrols.com for application engineering guidance.

Key Features

High-Efficiency Filtration Element

The Filters Adsorbing MD3 Series Ports 3/8 to 3/4; Flow to 165 scfm utilizes a high-quality filter element to remove particulate contamination from compressed air. Element construction is engineered to provide consistent filtration efficiency across the rated flow range while minimizing pressure drop. Filter element: Activated carbon with urethane seals.. Regular element replacement maintains system performance and protects downstream equipment.

Durable Construction for Industrial Environments

Constructed with Die-cast zinc body and Nitrile seals, the Filters Adsorbing MD3 Series Ports 3/8 to 3/4; Flow to 165 scfm withstands continuous industrial service across the full rated temperature range. Ambient/media temperature: With polycarbonate bowl: 40° to 125°F (4° to 52°C).. The robust housing protects internal components from mechanical damage in demanding plant environments.

Easy Serviceability and Replacement Parts

ROSS designs these filters for straightforward field maintenance. Bowl assemblies, filter elements, seal kits, and drain components are stocked as individual replacement parts. The bowl can be removed without tools on most models; element replacement takes minutes and requires no special equipment. Replacement part numbers are documented in the official installation sheet.

Technical Specifications

Specifications from official ROSS Controls documentation (Document ID 177):

Construction: Fiber.
Ambient/Media Temperature: With polycarbonate bowl: 40° to 125°F (4° to 52°C).
Fluid Media: Compressed air.
Inlet Pressure: With polycarbonate bowl: 0 to 150 psig (0 to 10 bar).
Filter Element: Activated carbon with urethane seals.
Body: Die-cast zinc
Seals: Nitrile
Compatible Lubricants: ISO 32 or lighter petroleum-base oils; aniline point 180°F–220°F (82°C–104°C)
Avoid oils with phosphate-type additives (e.g., zinc dithiophosphate)—harmful to polyurethane components

Applications

Industrial Compressed Air Systems

ROSS Filters Adsorbing MD3 Series Ports 3/8 to 3/4; Flow to 165 scfm is engineered for industrial compressed air supply and distribution systems where particulate and moisture contamination must be removed before air reaches sensitive downstream components including valves, regulators, actuators, and pneumatic tools. Reliable filtration extends the service life of all downstream equipment and maintains consistent system performance.

Modular Air Preparation Panels

When integrated into modular air preparation panels alongside ROSS regulators and lubricators, the Filters Adsorbing MD3 Series Ports 3/8 to 3/4; Flow to 165 scfm forms the critical first stage of a complete Fluid Conditioning Unit (FCU). Modular designs enable rapid field replacement of individual components without disturbing the rest of the air prep assembly.

Food, Beverage, and Pharmaceutical Processing

Hygienic manufacturing environments require compressed air systems that minimize contamination risk. ROSS filters with nitrile seals and aluminum or zinc bodies are compatible with food-grade compressed air service when supplied with appropriate upstream air treatment. Consult ROSS Controls for applications requiring specialty materials such as fluorocarbon seals or stainless steel wetted components.

Safety and Compliance Standards

ROSS Controls products are designed and manufactured to meet applicable industry and regulatory standards for compressed air safety. Always depressurize and lock out the air supply before performing any installation, adjustment, or maintenance activity. Verify that the system is fully vented before removing any components.

OSHA 29 CFR 1910.147 – Control of Hazardous Energy (Lockout/Tagout)
OSHA 29 CFR 1910.217 – Mechanical Power Presses (relevant for press applications)
ISO 8573 – Compressed Air Quality (guideline for air purity classification)
ANSI/NFPA T3.21.3 – Pneumatic Fluid Power Component Standards
Compatible lubricants: ISO 32 or lighter petroleum-base oils; aniline point 180°F–220°F; no phosphate-type additives
Self-relieving design prevents dangerous pressure buildup when outlet pressure exceeds the set point

Installation and Setup Guide

Follow these steps for safe installation of the ROSS Controls Filters Adsorbing MD3 Series Ports 3/8 to 3/4; Flow to 165 scfm:

1. Depressurize and lock out air pressure.
2. Confirm upstream pipes are free of excessive dirt and liquids.
3. Install the Filter as close as possible to the device it is to serve.
4. Orient the Filter so airflow follows the direction of the arrow on the head.
5. Install the Filter vertically with drain mechanism at the bottom.
6. Install Filters upstream of Regulators and Lubricators.
7. Connect drain tubing or install drain cock per the appropriate drain type.
8. Gradually restore air pressure and verify no leaks at all connections.
9. Monitor differential pressure; replace element at 8 psid (or per specification).

Why Choose ROSS Controls

Since 1921, ROSS Controls has built a global reputation for engineering excellence in fluid power. With over 100 years of experience designing valves, regulators, filters, safety controls, and air preparation equipment, ROSS delivers products trusted by manufacturers across automotive, aerospace, food processing, semiconductor, and general industrial markets.

ROSS products are supported by a worldwide network of authorized distributors who provide local inventory, application engineering, and service support. Contact ROSS Controls at 1-800-GET-ROSS or visit www.rosscontrols.com to connect with your local representative.

Download This Document

The official ROSS Controls Installation and Operating Instructions for the Filters Adsorbing MD3 Series Ports 3/8 to 3/4; Flow to 165 scfm (Document ID 177) is available as a PDF download:

PDF URL: https://ross-admin-global-us-east.s3.amazonaws.com/production/uploads/document_language_file/file/177/ROSS_Filter_Modular_Adsorbing_MD3_Series_SS-F021.pdf

Frequently Asked Questions

Q: What is the inlet pressure range for the ROSS Controls Filters Adsorbing MD3 Series Ports 3/8 to 3/4; Flow to 165 scfm?

A: The inlet pressure range is With polycarbonate bowl: 0 to 150 psig (0 to 10 bar)..

Q: What is the operating temperature range for this product?

A: The ambient and media temperature range is With polycarbonate bowl: 40° to 125°F (4° to 52°C).. Do not operate outside this range.

Q: What fluid media is this product rated for?

A: This product is designed for compressed air service only. Filters and lubricators with polycarbonate bowls must not be used with any fluid other than compressed air. Use of hazardous fluids could cause bowl failure or hazardous leakage.

Q: What body materials are used in construction?

A: Body material: Die-cast zinc. Seals: Nitrile. These materials are selected for compatibility with compressed air and standard industrial lubricants.

Q: How do I replace the filter element?

A: Depressurize and lock out air pressure before servicing. Remove the bowl assembly. Remove the element per the service instructions. Do not clean elements—replace them. Ensure all seals and O-rings are correctly located on reassembly. Lubricate O-rings with lithium grease. Torque all fasteners to specified values.

Q: Can this product be installed in any orientation?

A: No. Inline filters must be installed vertically with the drain mechanism at the bottom. This is required for proper liquid drainage and float drain function.

Q: What safety precautions are required before servicing?

A: Turn off all electrical power to the system. Shut off the air supply and exhaust all trapped air in the system. Lock out all power sources (OSHA 29 CFR 1910.147 Lockout/Tagout) before beginning any disassembly or service operation. Verify zero pressure with a calibrated gauge before loosening any fittings or components.

Q: How do I obtain replacement parts or technical support from ROSS Controls?

A: Contact ROSS Controls at 1-800-GET-ROSS or visit www.rosscontrols.com to locate your nearest authorized ROSS distributor, request replacement parts, or obtain technical application support. Replacement kits for seals, diaphragms, valve assemblies, and other wear components are available through ROSS distributors worldwide.

Q: What lubricants are compatible with ROSS product seals?

A: Use petroleum-base oils with oxidation inhibitors and an aniline point between 180°F and 220°F (82°C–104°C), ISO 32 viscosity or lighter. Oils specifically compounded for air line lubricator service are preferred. Avoid oils with phosphate-type additives (such as zinc dithiophosphate), which can damage polyurethane valve components.

Q: Where should I position this filter in the air line?

A: Install the filter as close as possible to the device it is to serve. Adsorbing filters require a general-purpose 5-micron filter and a coalescent filter installed immediately upstream to maximize adsorbing element life.