Multiple Lockout Device For Lockout L-O-X Valves

Product Overview

The ROSS Controls Multiple Lockout Device (Model 356A30) is a multi-hole lockout hasp designed for attachment to the ROSS L-O-X pneumatic energy isolation valve, enabling multiple workers to simultaneously apply their individual padlocks to a single lockout point. By requiring each worker involved in a maintenance or service operation to apply a personal lock, the multiple lockout device enforces the fundamental group lockout/tagout principle that no single person can re-energize a system while any other authorized worker remains in the hazard zone.

The 356A30 multiple lockout hasp accommodates up to 7 individual padlocks on the ROSS L-O-X valve lockout point. Each worker applying their personal lock adds a physical barrier that must be removed before the valve can be returned to the open (energized) position. The last worker to complete their portion of the job removes their lock, and only at that point is the valve unlockable by the authorized re-energization supervisor.

ROSS L-O-X (Lockout and Exhaust) valves are the recognized industry standard for pneumatic energy isolation, designed to block supply air and exhaust all downstream pressure simultaneously when closed. The lockout mechanism on the L-O-X valve is engineered to be lockable only in the OFF (closed) position, preventing inadvertent opening during maintenance. The Multiple Lockout Device extends this capability to group lockout scenarios required by OSHA 1910.147 and ANSI Z244.1 standards.

For safety managers, compliance officers, and machine designers specifying pneumatic lockout/tagout systems, the 356A30 Multiple Lockout Device provides the critical accessory required to convert a single-worker L-O-X valve lockout point into a fully compliant group lockout station for multi-worker maintenance teams.

Key Engineering Features

• Up to 7 Individual Padlocks - The 356A30 hasp contains multiple lock holes, each accommodating one personal padlock, enabling up to 7 workers to simultaneously apply individual locks to the same L-O-X valve lockout point during group maintenance operations.
• Protects Against Accidental Activation - When any personal lock remains on the hasp, the L-O-X valve cannot be pulled open, providing positive physical protection against accidental re-energization of the pneumatic system while personnel are in the hazard area.
• Universal L-O-X Valve Compatibility - The 356A30 is compatible with any ROSS L-O-X model, including the 15 Series Classic, Slim-Line, High-Capacity, Modular, and Stainless Steel configurations, as well as 27 Series Piloted L-O-X models, providing a single accessory part number for all ROSS energy isolation valve platforms.
• OSHA 1910.147 Group Lockout Compliance - Directly supports compliance with OSHA 29 CFR 1910.147 group lockout/tagout procedures, which require that each authorized employee performing service or maintenance apply their own personal lock to the energy isolation device.
• ANSI Z244.1 and CSA Z460 Compliant Design - Supports group lockout procedures as defined in ANSI/ASSE Z244.1-2016 and CSA Z460-2020 standards for the control of hazardous energy, enabling facilities to demonstrate regulatory compliance during safety audits.
• Simple, Robust Construction - The hasp is a durable metal device that attaches directly to the L-O-X valve lockout mechanism. Its simple design requires no tools for installation, allowing immediate deployment during multi-worker maintenance procedures.
• Low Unit Cost for Wide Deployment - At $25.50 per unit, the 356A30 enables cost-effective installation of group lockout capability at every L-O-X valve energy isolation point throughout a facility, supporting comprehensive LOTO program compliance.

Technical Specifications

General Specifications

Certifications & Compliance

Typical Applications & Industries

Automotive Assembly and Stamping

• Group lockout for multi-person die change crews working on large hydraulic-pneumatic press lines, where 3 to 5 tooling technicians must simultaneously lock out pneumatic energy sources at each L-O-X valve station before entering the press bed area.
• Maintenance team lockout on automotive body shop robotic welding cells, where a robot technician, a pneumatic technician, and an electrician all apply personal locks to the same L-O-X pneumatic isolation point before servicing the welding fixture pneumatics.
• Shift change LOTO handover procedures where incoming and outgoing maintenance technicians both apply personal locks to L-O-X valve isolation points during extended maintenance shifts, ensuring continuous protection throughout the shift change period.

Metal Processing and Steel Mill Operations

• Multi-trade contractor lockout at steel mill pneumatic L-O-X isolation stations where millwrights, electricians, and instrument technicians performing simultaneous maintenance tasks must each apply personal locks to the same energy isolation point.
• Annual maintenance outage procedures at aluminum casting and rolling facilities, where maintenance planning requires that department supervisors, maintenance technicians, and safety officers each apply personal locks to all energy isolation points during planned shutdown periods.
• Confined space entry procedures at press and forming operations where multiple entry team members must apply individual locks to pneumatic energy sources before a confined space attendant permits entry.

Packaging and Food Processing

• Sanitation and maintenance crew group lockout at high-speed packaging machine L-O-X isolation points, where sanitation personnel, maintenance technicians, and quality assurance personnel may need to simultaneously access and service different zones of the same pneumatic circuit.
• Product changeover procedures on multi-format packaging lines where L-O-X valve isolation points must remain locked throughout the changeover while mechanical, electrical, and line setup technicians each perform their assigned changeover tasks simultaneously.
• Compliance demonstrations during FDA and OSHA facility inspections, where multi-lock capability at pneumatic energy isolation points provides visible evidence of group lockout program implementation.

Pharmaceutical and Life Sciences Manufacturing

• GMP-compliant energy isolation during equipment qualification (IQ/OQ/PQ) activities where validation engineers, maintenance technicians, and quality assurance representatives must all be present and individually locked out at pneumatic energy sources before performing validation tests.
• Change control procedures during pharmaceutical manufacturing equipment modifications where multiple authorized personnel apply personal locks to L-O-X valve isolation points as part of formal change control documentation requirements.

General Industrial and OEM Machine Building

• Factory acceptance testing (FAT) procedures at OEM machine builder facilities where customer representatives, commissioning engineers, and quality control personnel each apply personal locks to pneumatic energy isolation points before participating in safety circuit verification tests.
• Contract maintenance operations where both facility maintenance personnel and outside contractor technicians apply individual locks to L-O-X valve isolation points before jointly servicing pneumatic equipment, satisfying OSHA contractor employer coordination requirements under 1910.147(f).

Petrochemical and Process Industries

• Permit-to-work system integration at chemical processing facilities where L-O-X valve isolation points require both the performing crew lead and the issuing supervisor to apply individual locks before a maintenance work permit is considered active.
• Hazardous maintenance operations at compressed gas and chemical handling facilities where the number of workers simultaneously accessing a machine requires 5 to 7 personal lock positions on a single pneumatic energy isolation point.

Ordering and Model Number Configuration

Related Products & Accessories

• 15 Series Manual Lockout L-O-X Valves - ROSS L-O-X energy isolation valves in Classic, Slim-Line, High-Capacity, and Stainless Steel configurations for which the 356A30 device is designed. https://www.rosscontrols.com/en/series/1287-lockout-valves-15-series
• 15 Series L-O-X Valves with EEZ-ON Soft-Start - L-O-X valves with integrated soft-start for controlled pneumatic re-pressurization after lockout. Compatible with 356A30 group lockout device. https://www.rosscontrols.com/en/documents/331
• 27 Series Piloted L-O-X Lockout Valves - Solenoid or pneumatically piloted valves with integrated L-O-X manual lockout control, compatible with 356A30 hasp. https://www.rosscontrols.com/en/series
• 988A30 Pop-Up Pressure Indicator - Visual pressure indicator for L-O-X valve sensing port to verify downstream pressure has been exhausted before worker entry. 1/8 inch NPT port. https://www.rosscontrols.com/en/series
• 586A86 Pressure Switch (EN Connector) - Pressure switch for L-O-X valve sensing port with EN 175301-803 connector. Closes on falling pressure of 5 psig. https://www.rosscontrols.com/en/series
• 1153A30 Pressure Switch (M12 Connector) - Pressure switch for L-O-X valve sensing port with M12 connector. Closes on falling pressure of 5 psig. https://www.rosscontrols.com/en/series

Frequently Asked Questions (FAQ)

Q: What is the purpose of a multiple lockout device on a pneumatic valve?

A: A multiple lockout device allows several workers to simultaneously apply their individual padlocks to the same energy isolation point. OSHA 1910.147 requires that during group lockout/tagout procedures, each authorized employee apply their own personal lock to the energy isolation device. A single-lock L-O-X valve supports one padlock at a time; the 356A30 hasp extends the lockout point to accommodate up to 7 simultaneous padlocks for group maintenance operations.

Q: How many padlocks can the 356A30 accommodate?

A: The 356A30 Multiple Lockout Device accommodates up to 7 individual padlocks simultaneously on the ROSS L-O-X valve lockout point. Each hole accepts one standard safety padlock. The valve cannot be re-opened while any padlock remains installed in the hasp.

Q: Is the 356A30 compatible with all ROSS L-O-X valve models?

A: Yes. The 356A30 is designed for use with any ROSS L-O-X model, including 15 Series Classic, Slim-Line, High-Capacity, Modular, and Stainless Steel L-O-X valves, as well as 27 Series Piloted L-O-X models. Contact ROSS Controls to confirm compatibility with specific L-O-X model numbers.

Q: Does the multiple lockout device work with padlocks I already have in our LOTO program?

A: The 356A30 hasp holes accept standard safety padlocks compatible with the ROSS L-O-X valve lockout mechanism. The L-O-X valve lockout hole diameter is 0.27 inch (7.0 mm) with a length of 0.43 inch (10.9 mm). Confirm your facility's padlock shackle diameter is compatible with standard L-O-X lockout hole dimensions. Contact ROSS Controls if specialized padlock compatibility is required.

Q: What OSHA standard requires the use of a multiple lockout device?

A: OSHA 29 CFR 1910.147 (Control of Hazardous Energy) requires that when more than one person is involved in a servicing or maintenance operation, each authorized employee must apply their own personal lock to the energy isolation device (Section 1910.147(f)(3)). This group lockout requirement mandates a device capable of accepting multiple padlocks simultaneously, which is precisely the function of the 356A30 hasp.

Q: What happens if one worker finishes their task but others are still working?

A: When a worker completes their assigned task, they remove only their personal padlock from the 356A30 hasp. The remaining personal padlocks from other workers remain on the hasp. As long as any personal padlock remains in the hasp, the L-O-X valve cannot be re-opened and the pneumatic energy source cannot be restored. The system can only be re-energized when the last worker removes their personal lock and the designated supervisor confirms all personnel are clear.

Q: Should each L-O-X valve on a machine have its own 356A30 device?

A: Not necessarily. The 356A30 attaches to the L-O-X valve when group lockout procedures are initiated. Some LOTO programs maintain 356A30 hasps in a lockout kit that travels to each energy isolation point as needed. Other programs install a 356A30 permanently at each L-O-X valve point that regularly requires group lockout. Evaluate your facility's LOTO program procedures and the frequency of group maintenance activities to determine the appropriate deployment strategy.

Q: Can the 356A30 be used with the ROSS L-O-X EEZ-ON soft-start valve?

A: Yes. The 356A30 is compatible with L-O-X valves incorporating EEZ-ON soft-start functionality. The EEZ-ON soft-start function controls the rate of pneumatic pressure re-application after the lockout is released; it does not affect the lockout mechanism itself. The 356A30 hasp attaches to the L-O-X lockout hole on EEZ-ON equipped models in the same manner as standard L-O-X valves.

Q: Are there pressure verification accessories available to confirm zero-energy state before worker entry?

A: Yes. ROSS offers two types of pressure verification accessories for the L-O-X valve integrated sensing port: Model 988A30 is a visual pop-up indicator (1/8 inch NPT) that provides visual confirmation that downstream pressure has been exhausted. Models 586A86 (EN connector) and 1153A30 (M12 connector) are pressure switches that close on falling pressure at 5 psig, providing electrical confirmation to a control system or indicator light. Either type enables workers to verify zero-energy state at the isolation point before entering the hazard zone.

Q: Is the 356A30 required for single-worker maintenance tasks?

A: No. For single-worker maintenance, the worker applies their personal padlock directly to the L-O-X valve lockout hole (0.27 inch diameter). The 356A30 hasp is specifically needed when two or more workers simultaneously participate in a maintenance or service activity and each must apply their own personal lock. The 356A30 is also useful when a supervisor wants to apply a supervisory lock in addition to individual worker locks.

Q: What is the price of the 356A30 Multiple Lockout Device?

A: The 356A30 Multiple Lockout Device is listed at $25.50. At this price, comprehensive deployment of multiple lockout capability at every L-O-X valve point in a facility represents a minor line item in a safety capital investment. Contact ROSS Controls at (800) 438-7677 or visit rosscontrols.com for current pricing and availability.

Q: Does ROSS offer any training resources for L-O-X valve lockout/tagout procedures?

A: ROSS Controls certified safety professionals are available to provide on-site training for lockout/tagout procedures and system validation, facility LOTO audits, machine risk assessments, and single-point lockout system design. Contact ROSS Controls through rosscontrols.com or at (800) 438-7677 to inquire about safety training and consulting services.

Installation & Maintenance Guidelines

• Before initiating any lockout procedure, the group lockout supervisor must identify all energy sources and communicate the lockout plan to all participating workers.
• Close the L-O-X valve by pushing the handle inward to the fully closed position. Confirm that downstream pneumatic pressure is exhausting through the L-O-X valve exhaust port.
• Verify that downstream pressure has reached zero using an optional visual pop-up indicator (988A30) or pressure switch (586A86 or 1153A30) at the L-O-X valve sensing port.
• Attach the 356A30 Multiple Lockout Device hasp to the L-O-X valve lockout hole.
• Each participating worker applies their personal padlock to one of the available hasp holes. No worker should apply their lock until they have personally confirmed the valve is in the locked-out position.
• With all personal locks applied, each worker performs their assigned maintenance or service task.
• Upon completing their work, each worker removes only their own personal padlock from the hasp.
• The group lockout supervisor verifies that all personnel have cleared the hazard area before authorizing re-energization. With all personal locks removed, the L-O-X valve can be returned to the open position.

Warranty & Global Support

ROSS Controls provides a one-year warranty on all products, covering defects in material and workmanship from date of purchase.

Global technical support is available through ROSS offices in the USA (headquarters in Ferndale, Michigan), Canada, Brazil, Germany, France, United Kingdom, India, China, and Japan.

Contact ROSS Controls USA Customer Service at 1-800-GET-ROSS or Technical Service at 1-888-TEK-ROSS.

For L-O-X valve selection, group lockout system design, and safety compliance support, visit rosscontrols.com or contact ROSS Controls at (800) 438-7677.