21 & 27 Series Inline Poppet Valves ATEX Version Operation Manual

Overview

ROSS Controls, founded in 1921 with over 100 years of leadership in fluid power, publishes this multilingual operation manual (Document RE-05, Rev. 05/2015) for the ROSS Headline Series 27 and 21 poppet valves in ATEX-approved versions for electrically and pneumatically actuated configurations. This manual covers 2/2-way, 3/2-way, and 4/2-way poppet valve configurations in normally closed (NC) and normally open (NO) versions, designed for installation in explosive atmosphere (ATEX) classified zones in the European market.

ATEX-approved versions of the 21 and 27 Series poppet valves comply with the European ATEX Directive (2014/34/EU, formerly 94/9/EC) and are suitable for use in ATEX Zone 1 (for gas) and Zone 21 (for dust) classified areas. The valves use encapsulated solenoids where applicable to prevent ignition of surrounding explosive atmospheres. Both electrical (solenoid) and pneumatic actuation versions are available with ATEX approval.

This manual is published in multiple languages including German, English, French, Italian, Spanish, and Russian, reflecting the global applicability of ATEX-approved pneumatic components. Connection threads are available in G (metric) sizes. For further information, contact ROSS Europa GmbH or ROSS Controls at 1-800-GET-ROSS or www.rosscontrols.com.

Key Features

ATEX-Certified for Explosive Atmosphere Zones

The ATEX version of the 21 and 27 Series poppet valves carries the CE marking and ATEX certification required for use in European explosive atmosphere classified zones. The ATEX Directive covers both gas (Zone 0/1/2) and dust (Zone 20/21/22) atmospheres. The appropriate equipment category and protection concept designation is marked on the product. Both electrically and pneumatically actuated versions are available with ATEX certification.

Full Range of 2/2, 3/2, and 4/2-Way Functions

Available in all standard directional valve functions: 2/2-way normally closed (blocks flow when de-energized), 2/2-way normally open (allows flow when de-energized), 3/2-way NC and NO (with exhaust port), and 4/2-way (dual output with cross-flow exhaust). G-thread connection sizes range from G1/4 through G1-1/2 for the largest valve sizes. Dimensional data for all configurations is tabulated in the manual.

Electrical and Pneumatic Actuation Available

Both electrically actuated (solenoid-piloted) and pneumatically actuated versions of the ATEX Headline Series are available. The pneumatic actuation version eliminates the need for intrinsically safe or explosion-proof solenoids in the classified zone by using a pneumatic pilot signal supplied from a valve located outside the hazardous area. This is often the preferred approach in the most severe gas explosive atmosphere zones.

Technical Specifications

Product Series: ROSS Headline Series — poppet valves for line mounting, Series 21 and 27
Version: ATEX-approved for electrically and pneumatically actuated configurations
Valve Functions: 2/2-way NC, 2/2-way NO, 3/2-way NC, 3/2-way NO, 4/2-way directional control
Connection Threads: G1/4, G3/8, G1/2 (small body); G1/2, G3/4, G1 (medium); G1, G1-1/4, G1-1/2 (large)
Applicable Directive: ATEX 2014/34/EU (formerly 94/9/EC)
Applicable Zones: Zone 1 (gas), Zone 21 (dust)
Actuation: Electrical (solenoid) and pneumatic
Document: RE-05, Rev. 05/2015
Languages: German, English, French, Italian, Spanish, Russian
Manufacturer: ROSS Europa GmbH, Langen (Hessen), Germany

Applications

European Hazardous Area Classified Zones

In European Union member states, the ATEX directive governs electrical and mechanical equipment used in potentially explosive atmospheres. Plants operating in chemical manufacturing, petroleum refining, pharmaceutical production, food processing (flour dust), and paint and coating applications require ATEX-certified equipment. The 21 and 27 Series ATEX poppet valves provide the necessary certification for pneumatic valve use in these classified zones.

Pneumatic Piloting in Zone 0/1 Gas Areas

For Zone 0 or Zone 1 gas areas where even intrinsically safe solenoids may be impractical, the pneumatically actuated ATEX version allows the pilot signal to be generated by a valve located outside the classified zone. The main valve body in the hazardous area has no electrical components, eliminating the ignition risk associated with solenoid components while still providing remote pneumatic directional control.

Safety and Compliance Standards

This operation manual must be read and fully understood before installing ATEX-version poppet valves. The ATEX certification covers specific product configurations — verify that the specific valve model ordered carries the required ATEX category and group marking for the intended zone. CE declarations of conformity and ATEX certificates are available for download at www.rosscontrols.com. Maintain all ATEX-specific installation, inspection, and maintenance requirements as defined in the manual and in ATEX installation guidance (EN 60079-14 and EN 60079-17).

Installation and Setup Guide

ATEX Installation Key Points

Step 1: Verify the valve ATEX category and group marking matches the zone classification.
Step 2: Read the complete multilingual operation manual (RE-05) before installation.
Step 3: Install per standard inline poppet valve procedures — see separate product installation instructions.
Step 4: For electrically actuated versions: use ATEX-certified cable glands and conduit seals as required by EN 60079-14.
Step 5: For pneumatically actuated versions: route pilot supply lines from a valve outside the classified zone.
Step 6: Ensure all cable and conduit connections maintain the ATEX enclosure protection rating.
Step 7: Perform initial function test and document in machine technical file.
Step 8: Establish periodic inspection and proof test schedule per EN 60079-17 and manufacturer recommendations.

Why Choose ROSS Controls

ROSS Controls, founded in 1921 with over 100 years of leadership in fluid power, provides ATEX-certified versions of Headline Series poppet valves with complete multilingual documentation to support CE marking and ATEX compliance globally. ROSS Europa GmbH supports European customers with local technical expertise. Contact ROSS at 1-800-GET-ROSS or visit www.rosscontrols.com.

Download This Document

PDF download: https://ross-admin-global-us-east.s3.amazonaws.com/production/uploads/document_language_file/file/145/21_27_Series_Poppet_Valves_Operation_Manual_ATEX_RE-05_Rev.05.2015.pdf

Frequently Asked Questions

Q: What ATEX directive does this product comply with?

A: ATEX Directive 2014/34/EU (formerly 94/9/EC) for equipment and protective systems intended for use in potentially explosive atmospheres.

Q: What zones can the ATEX version be used in?

A: Zone 1 (gas explosive atmospheres) and Zone 21 (dust explosive atmospheres), subject to confirmation of the specific ATEX category marking on the product.

Q: What valve functions are available in the ATEX version?

A: 2/2-way NC, 2/2-way NO, 3/2-way NC, 3/2-way NO, and 4/2-way directional control.

Q: What actuation methods are available?

A: Both electrical (solenoid) actuation and pneumatic actuation with ATEX approval.

Q: What connection thread sizes are available?

A: G1/4 through G1-1/2 (metric G threads) across small, medium, and large body sizes.

Q: What languages is the manual available in?

A: German, English, French, Italian, Spanish, and Russian.

Q: Where can I download CE declarations and ATEX certificates?

A: Declarations and certificates are available for download at www.rosscontrols.com.

Q: What standard governs ATEX installation?

A: EN 60079-14 (installation) and EN 60079-17 (inspection and maintenance) are the applicable installation and maintenance standards for ATEX equipment.