ROSS RSe Series Safe Exhaust and Safe Return Double Valve Interactive 3D Product Demonstration PDF

RSe Series Features and Technical Highlights

Redundant Spool Type Design for Reliable Operation

The RSe Series is built around a dual spool and sleeve construction — two independent valve elements operating simultaneously within a single valve body. Each valve element is actuated by its own dedicated solenoid, and both solenoids are energized and de-energized synchronously, ensuring that the valve functions as a true redundant system rather than a simple dual-channel configuration. PNP solid state proximity sensors monitor the position of each spool, providing continuous feedback that the valve has shifted correctly and fully in response to each control signal, consuming less than 23 mA each.

Multi-Configuration Versatility

The RSe platform is engineered to serve multiple pneumatic safety functions from a single base product architecture. The 3/2 configuration provides the Safe Exhaust function — supplying air to a zone or machine and then exhausting all residual downstream pneumatic energy when signaled to shut off, ensuring the safe energy state for personnel access. The 5/2 configuration provides the Safe Return function, driving actuators to a defined safe position upon de-energization. Additionally, the RSe platform supports Safe Pressure Select and Safe Return Dual Pressure configurations, making it one of the most flexible safety valve families available for complex multi-zone machinery applications.

External Monitoring with 99% Diagnostic Coverage

The RSe Series employs dynamic, cyclical, external monitoring of both valve position sensors to achieve 99% diagnostic coverage — meeting the requirements for Category 4 / PL e per ISO 13849-1:2015 and SIL 3 per IEC 62061:2005. The monitoring system checks the state of both PNP solid state position sensors during each machine cycle, detecting discordance (disagreement between the two valve positions) within a maximum discordance time of 250 milliseconds. The minimum required operation frequency is once per month to ensure the self-checking capability remains valid for functional safety calculations.

Flexible Base Mounting with Dual-Side Porting

The RSe Series is designed for base mounting in any orientation, with vertical mounting preferred for optimal performance. Inlet and outlet ports are provided on both sides of the valve base, giving system designers maximum flexibility in routing pneumatic lines without dedicated left-hand or right-hand configurations. Connection options include both NPT and G threaded ports to accommodate North American and international installation standards. Captive valve-to-base mounting screws simplify installation and service while preventing the loss of hardware during maintenance procedures.

Technical Specifications and Performance Data

Operating Parameters and Pressure Ratings

• Function: 3/2 Normally Closed (Safe Exhaust) and 5/2 (Safe Return)
• Operating Pressure (Internal Pilot): 43–145 psig (3–10 bar)
• Operating Pressure (External Pilot): 0–145 psig (0–10 bar)
• Pilot Supply: Internal or External
• Ambient and Media Temperature: 40–120°F (4–50°C)
• Flow Media: Compressed air per ISO 8573-1 Class 7:4:4
• Mounting: Base mounted, any orientation, preferably vertical
• Max Discordance Time: 250 msec
• Minimum Operation Frequency: Once per month
• Valve Reset: Automatic by de-energizing solenoids

Electrical Specifications

• Solenoid Voltage: 24V DC, 1.5 watts each, continuous duty
• Solenoid Standard: VDE 0580
• Enclosure Rating: DIN 400 50 IP 65
• Solenoid Connector: DIN EN 175301-803 Form C
• Sensor Connector: M8
• Pressure Sensors: PNP solid state, <23 mA each
• Solenoid Count: 2 total (one per valve element), operated synchronously

Flow Capacity and Port Sizes

• Port Size 1/8: Flow Cv (1-2) 0.63 (620 Nl/min) | Exhaust Cv (2-3) 1.03 (1000 Nl/min) | Weight 2.9 lb (1.3 kg)
• Port Size 1/4: Flow Cv (1-2) 0.85 (840 Nl/min) | Exhaust Cv (2-3) 1.75 (1700 Nl/min) | Weight 3.7 lb (1.7 kg)
• Port Size 1/2: Flow Cv (1-2) 1.96 (1900 Nl/min) | Exhaust Cv (2-3) 5.27 (5200 Nl/min) | Weight 6.6 lb (3.0 kg)
• Thread types available: NPT or G (ISO) to suit regional installation requirements
• Ports 1, 3, 5, and EPS clearly visible and labeled on the 3D interactive model

Functional Safety Data

• Safety Category / Performance Level: Category 4, PL e per ISO 13849-1:2015
• Safety Integrity Level: SIL 3 per IEC 62061:2005
• B10D (dangerous failures): 20,000,000 cycles
• PFHd: 7.71 × 10⁻⁹ (probability of dangerous failure per hour)
• MTTFd: 301.9 years (nop: 662,400 cycles/year)
• Diagnostic Coverage: 99% (external cyclical monitoring of both position sensors)
• SISTEMA Library: Available for ISO 13849-1 calculations
• Vibration Testing: DIN EN 60068-2-6

Applications and Industries

General Industrial Automation

The RSe Series 3/2 Safe Exhaust valve is ideally suited for guarding the pneumatic energy supply to individual zones or machines within a larger automated system. When a safety function is triggered — such as the opening of a safety gate or the actuation of an emergency stop — the RSe valve immediately shuts off supply air and exhausts all residual downstream pressure, preventing stored pneumatic energy from causing unexpected actuator movement during maintenance access. This makes the RSe an essential component for implementing pneumatic energy control (PEC) programs compliant with OSHA lockout/tagout (LOTO) regulations and machine safety standards.

Automotive and Robotic Manufacturing

In automotive assembly and robotic manufacturing environments, the RSe Series 5/2 Safe Return configuration drives actuators — grippers, clamps, lifts, and transfer mechanisms — to a defined safe position when the safety system is activated, protecting personnel from robot reach zones and fixture pinch points. The valve's Category 4 / PL e rating satisfies the most demanding functional safety requirements commonly specified for collaborative and industrial robot cell perimeter guarding systems. The RSe's compact, base-mounted design integrates cleanly into the pneumatic manifold architectures typical of automotive tooling and fixture assemblies.

Packaging, Paper, and Timber Industries

The RSe platform's multi-configuration versatility makes it equally effective across packaging machinery, paper processing lines, and timber cutting equipment — industries where high cycling rates and the presence of multiple pneumatically powered hazards demand robust, proven safety valve solutions. The RSe's B10D rating of 20,000,000 cycles supports the demanding duty cycles of continuous production environments, and its IP 65 enclosure rating protects against the dust, moisture, and contaminants common in wood processing and paper mill applications. ROSS Controls offers application-specific integration guides for each RSe configuration to help engineering teams implement the correct safety circuit topology for their specific machinery.

Safety Standards and Compliance

The RSe Series has been designed, tested, and certified to meet the most rigorous global industrial safety standards. Functional safety performance is certified to Category 4, Performance Level e per ISO 13849-1:2015 and Safety Integrity Level 3 per IEC 62061:2005 — the highest classifications in their respective standards, appropriate for the most demanding safety applications. The valve is approved by DGUV under certificate HSM 21030, confirming compliance with European occupational safety requirements for pneumatic safety components. CE marking confirms conformity with applicable European Directives, and EAC certification covers deployment in the Eurasian Economic Union. CSA/UL certification addresses North American market requirements. Flow media quality is specified per ISO 8573-1 Class 7:4:4 for compressed air. Solenoid coils comply with VDE 0580, and solenoid electrical connectors conform to DIN EN 175301-803 Form C. Vibration durability has been verified per DIN EN 60068-2-6, confirming the valve's suitability for use on vibrating machinery structures. The SISTEMA library for the RSe Series is available from ROSS Controls, enabling safety engineers to rapidly integrate validated RSe safety data into their ISO 13849-1 calculations for complete machine safety assessments.

How to Use the RSe Series 3D Interactive PDF

Switching Between 3/2 and 5/2 Valve Views

The RSe Series 3D Interactive PDF includes an intuitive toggle interface that allows users to switch between the 3/2 Valve (Safe Exhaust, Normally Closed) and the 5/2 Valve (Safe Return) configurations with a single click. Each configuration is presented as a fully rendered, separate 3D model view within the PDF, allowing direct visual comparison of the two valve types. This interactivity eliminates the need to open separate documents or maintain multiple browser tabs, streamlining the engineering review process and reducing the risk of selecting the incorrect configuration during procurement or system design.

Examining Port Configurations and Mounting Details

Once a valve configuration is selected, users can rotate, zoom, and pan the 3D model freely to examine all aspects of the valve geometry. Port markings for ports 1, 3, 5, and the EPS exhaust port are clearly visible and labeled on the model, allowing engineers to verify port positioning relative to their planned piping layout before committing to a design. Base mounting features, including the captive screw locations, can be examined from any angle to confirm fit within an existing manifold or mounting surface. This level of visual detail reduces pre-purchase engineering questions and accelerates the approval cycle for new installations.

Why Choose ROSS Controls

Engineering Heritage and Product Quality

ROSS Controls was founded in 1921 and has more than 100 years of continuous experience designing and manufacturing pneumatic valves and safety systems for industrial machinery. The RSe platform reflects this heritage — engineered from the ground up to meet the requirements of modern functional safety standards, with a construction quality and certification depth that supports the most demanding Category 4 / PL e and SIL 3 applications. The RSe's multi-configuration architecture means that a single platform covers Safe Exhaust, Safe Return, Safe Pressure Select, and Safe Return Dual Pressure safety functions, simplifying supplier qualification and spare parts management for plant engineering teams.

Global Support and Technical Resources

ROSS Controls supports its customers with a global network of technical sales and application engineering resources. In North America, customers can reach ROSS Controls directly at 1-800-GET-ROSS (1-800-438-7677) or through the company's website at www.rosscontrols.com. For each RSe configuration — Safe Exhaust, Safe Return, Safe Pressure Select, and Safe Return Dual Pressure — ROSS provides dedicated product catalogs, integration guides, and SISTEMA library data to support complete machine safety documentation. International customers are served through ROSS Controls' regional offices and authorized distributor network, ensuring access to technical support, application engineering assistance, and certified product documentation in all major industrial markets.

Download RSe Series 3D Interactive Product Demonstration PDF

What You Will Find in This Document

• Interactive 3D model of the RSe Series double solenoid safety valve with free rotation, zoom, and pan
• Toggle between the 3/2 Valve (Safe Exhaust) and 5/2 Valve (Safe Return) configurations in a single document
• Clearly labeled port markings for ports 1, 3, 5, and EPS visible on the 3D model
• Base mounting detail views including captive screw locations and mounting surface geometry
• Visual representation of solenoid connector (DIN EN 175301-803 Form C) and sensor connector (M8) locations
• Overview of available port sizes (1/8, 1/4, 1/2 NPT or G) and their physical proportions on the valve body
• Reference to ROSS Controls product family — Safe Exhaust, Safe Return, Safe Pressure Select, Safe Return Dual Pressure
• Contact information and guidance for requesting technical support, application engineering assistance, and SISTEMA library data

Who Should Download This Document

• Mechanical engineers designing pneumatic safety circuits for industrial machinery
• Safety engineers conducting functional safety assessments per ISO 13849-1 or IEC 62061
• Automation system designers evaluating valve options for Category 4 / PL e or SIL 3 applications
• OEM equipment builders specifying safety-rated pneumatic components for new machine designs
• Procurement and sourcing managers comparing safety valve suppliers for industrial automation programs
• Maintenance and service engineers verifying valve configuration and port layout for replacement or upgrade projects
• Plant safety managers reviewing pneumatic energy control solutions for LOTO compliance programs

Related ROSS Controls Products and Documentation

• RSe Series Safe Exhaust Catalog — Full technical catalog for the RSe 3/2 Normally Closed Safe Exhaust double valve, including dimensional drawings, ordering codes, and complete performance data for 1/8, 1/4, and 1/2 port sizes.
• RSe Series Safe Return Catalog — Technical documentation for the RSe 5/2 Safe Return configuration, covering actuator return-to-safe-position applications and full ordering information.
• RSe Series Safe Pressure Select Catalog — Application-specific catalog for dual-pressure safety circuits using the RSe platform, enabling selection between high and low pressure supply lines under safety control.
• RSe Series Safe Return Dual Pressure Catalog — Technical reference for Safe Return configurations incorporating dual pressure supply, suited to applications requiring precise force control in the safe state.
• RSe Series Integration Guide — Step-by-step installation, wiring, and commissioning guidance for integrating the RSe Series valve with safety controllers, including monitoring circuit examples and SISTEMA library reference data.
• ROSS Controls DS Series Double Valve — Alternative double valve platform for applications not requiring the full RSe feature set, available in a range of sizes and pressure ratings for general safety circuit use.

Frequently Asked Questions

Q: What is the RSe Series 3D PDF?

A: The RSe Series 3D Interactive PDF is a product demonstration document created by ROSS Controls in partnership with 3D Sales Technologies GmbH. It contains a fully navigable three-dimensional model of the RSe Series double solenoid safety valve, viewable in standard PDF reader software without any additional software installation. The document allows users to rotate, zoom, and inspect the valve from any angle, and to toggle interactively between the 3/2 Valve (Safe Exhaust) and 5/2 Valve (Safe Return) configurations, making it a powerful tool for product evaluation, engineering review, and customer presentations.

Q: What is the difference between the 3/2 and 5/2 RSe valve configurations?

A: The 3/2 RSe valve is a three-port, two-position Normally Closed valve that provides the Safe Exhaust function. When energized, it supplies air to the downstream zone or machine. When de-energized — either by a normal stop command or a safety event — it shuts off the supply and exhausts all residual downstream pneumatic energy, ensuring the safe state for personnel access. The 5/2 RSe valve is a five-port, two-position valve that provides the Safe Return function: when de-energized, it drives connected actuators (cylinders, grippers, etc.) to a defined safe position by routing supply air to the return side and exhausting the extend side, rather than simply venting all downstream pressure.

Q: What safety level does the RSe Series achieve?

A: The RSe Series is certified to Category 4, Performance Level e (PL e) per ISO 13849-1:2015 and Safety Integrity Level 3 (SIL 3) per IEC 62061:2005 — the highest performance classifications in their respective standards. These ratings are supported by the valve's dual-spool redundant design, dynamic cyclical external monitoring with 99% diagnostic coverage, a B10D of 20,000,000 cycles, and a PFHd of 7.71 × 10⁻⁹. DGUV approval under certificate HSM 21030 provides additional third-party confirmation of the valve's safety compliance.

Q: What is the operating pressure range?

A: The RSe Series operates from 43 to 145 psig (3 to 10 bar) when using internal pilot supply. With external pilot supply, the main line operating pressure range extends from 0 to 145 psig (0 to 10 bar), enabling use in systems where the main supply pressure may drop below the minimum internal pilot pressure threshold. External pilot supply is also beneficial in applications where the downstream circuit must be fully exhausted to zero pressure while the pilot circuit remains pressurized to hold the valve in the energized (supply-open) position.

Q: How does the automatic valve reset work?

A: The RSe Series features automatic reset by de-energizing and then re-energizing the solenoids. When a safety event occurs and the valve shifts to the safe state, the external monitoring system detects the valve position change and confirms that both spools have moved correctly. To return the valve to normal operation after the safety condition has been cleared and the machine has been inspected, the safety controller simply re-energizes both solenoids simultaneously. There is no manual reset button, physical reset lever, or additional mechanical intervention required — the reset is entirely electrical, simplifying the restart procedure and reducing reset time.

Q: What port sizes are available?

A: The RSe Series is available in three port sizes: 1/8, 1/4, and 1/2, in both NPT (North American standard) and G (ISO metric) thread forms. The 1/8 port size offers a flow Cv of 0.63 (620 Nl/min) in the 1-2 direction and an exhaust Cv of 1.03 (1000 Nl/min) in the 2-3 direction, with a valve weight of 2.9 lb (1.3 kg). The 1/4 port provides Cv values of 0.85 (840 Nl/min) and 1.75 (1700 Nl/min) respectively, weighing 3.7 lb (1.7 kg). The 1/2 port offers the highest flow capacity with Cv values of 1.96 (1900 Nl/min) and 5.27 (5200 Nl/min), and a valve weight of 6.6 lb (3.0 kg). All port sizes are visible and physically differentiated in the 3D interactive model.

Q: How are the proximity sensors used for monitoring?

A: The RSe Series incorporates two PNP solid state proximity sensors — one for each valve spool element — that continuously report spool position to the external monitoring system (typically a safety PLC or dedicated safety relay module). The monitoring approach is dynamic and cyclical: the safety controller checks that both sensors agree (concordance) on the valve position at the beginning and end of each machine cycle. If the two sensors disagree for more than 250 milliseconds (the maximum discordance time), the monitoring system detects a fault and initiates a safety response. The M8 sensor connectors are standardized for easy integration with common safety controller I/O modules.

Q: Can the RSe be used for safe cylinder return applications?

A: Yes. The RSe Series 5/2 Safe Return configuration is specifically designed for safe cylinder return applications. Rather than exhausting all downstream pressure (as the 3/2 Safe Exhaust does), the 5/2 valve uses all five ports to simultaneously retract a cylinder — routing supply air to the rod-end port to drive retraction while exhausting the cap-end port — when de-energized. This ensures that a connected actuator moves to a predictable, defined safe position rather than simply losing pressure and potentially remaining in a mid-stroke or extended position. For applications requiring dual-pressure safe return — where the return motion must be limited to a lower force level — the RSe Safe Return Dual Pressure configuration provides this capability from the same proven platform architecture.