×

Sigma Hellas Ltd contact information

If you still have problems, please let us know, by sending an email. Thank you!

Working Hours

Mon - Fri: 08:00 - 16:00 (EET)
Sat: Closed
Sun: Closed

FORGOT YOUR DETAILS?

Interlocking - Safe Key Sequencing Access Systems

Eliminate the risk of human error or negligence in the safety procedure by aiming to have fail safe systems in place.

Internationally there are strong indications of a fundamental shift of emphasis in safety legislation from prescriptive regulations to the risk management (goal setting) approach. This approach places primary legal responsibility on owners and operators to adopt ‘best available’ technology and methodology to ensure safety.

This evolving change ensures accountability but does not necessarily lead to accident prevention. Asset owners and operators are perhaps more liable than ever before and can no longer plead conformance to prescribed standards when things go wrong.

Interlocking Safe Key sequencing access systems serve as safety devices on industrial equipment and many consumer products.

We provide the correct systems for Lockout / Tagout (LOTO) for Hazardous energy sources control (electrical, mechanical, hydraulic, pneumatic, chemical, thermal, and other energy sources),

A safe key sequencing system can be defined as a device that prevents you from making an inappropriate action, or adjusts the system to a safe state if you make an inappropriate action.

In the context of safety, safe key sequencing systems can prevent a user from making unsafe actions, or minimize the hazard of unsafe actions by rendering the machine in a safe condition when an unsafe action takes place. For example, a guard may be interlocked to prevent machine operation when the guard is removed, or a control may be interlocked to make it non-operational should a dangerous condition result. Safe key sequencing systems may have additional or combined features to reduce hazards.

Thanks to the simplicity and efficiency of the key transfer principle, our safe sequence systems guarantee that your operator will follow the safety process step by step before accessing to a dangerous area or machinery.

These safety systems can be used today by industry sectors such as: Energy, building industry, Steel, Chemical/Petrochemical, Marine, Trains, Tram, Airports, Food & Beverage, etc.

The Key Transfer

“More than a principle ... The way forward to optimum safety”

Based on the idea that a key can not be in two places at the same time, our locking systems force operators to perform a predetermined sequence, particularly in relation to maintenance and operating requirements. In its most basic form, the key transfer principle involves the positive locking of the power source and access point of a machine, with locks operated by a single common key. Our extensive range of locks permits the locking of most control circuits, switchgear and access points.

This technology,  is considered to be the most effective form of industrial safety.

By this method, you have the guarantee that all your hazardous work areas are protected with maximum security. This technology, is considered to be the most effective form of industrial safety protection, and can be completely automated.

The devices are cost effective, quick and easy to install.

A simple system might consist of two locks and a single key.
Safe access is enabled through transfer of keys that are either trapped or released in a safe sequence. For example a key is used to the isolate power, this key is then released and can then be used to gain access through a gate or door to a high risk area by inserting it in to an access lock. The key will then remain trapped until the gate or door is closed. A personnel or safety key can be released from the access lock, this ensures that the gate or door can not be closed and the initial key released until this personnel or safety key is returned. This provides increased operator safety.

Benefits
- Substantial reduction of worker accidents.
- Easy to install and to integrate on your working process.
- Predetermined sequence of actions to follow in order to gain access to a dangerous area or machine.

INTERLOCK safety products are divided in to four groups
 

The ‘S’ series The ‘NX’ series The ‘HFS’ series The ‘ROTARY' series
Copper-aluminium locking systems dedicated for heavy duty applications or aggressive environment such as cement industries for example. Complete stainless steel locking systems. Suitable for all types of industrial applications (mechanical or electrical). Several combinations are available. Used mainly in the Energy sector for guaranteed safety on medium & low voltage installations (transformers, circuit breaker...) Made in nickel brass. Composed by rotary and cam locking systems for the controlling access of power or control circuits.

Other Special Interlocking Products

RGV hose coupling interlock safeguards silo deliveries
Our RGV range of hose coupling safety products, which are fitted to silo inlet pipes, ensure tanker drivers deliver their load to the correct silo.

Companies need to consider the risk of a tanker driver accidently delivering their load to the wrong storage silo. Such processes have to be optimized to satisfy increasingly tough legal requirements, as well as to prevent the risk of accidents caused mainly by human error.
Now lighter, more resilient and easy to use, the latest version of the RGV enables the safe transfer of goods via trapped-key interlocking technology. The RGV range requires operators to receive authorization from the control room before the process can begin. Depending on the type of product being used, this authorization is given either by the hose coupling being unlocked remotely or through the use of an interlocking safety key. The addition of an inductive proximity sensor indicates that a tanker driver is transferring their load.

Mechanical RGV
To connect this product to the silo, the operator must obtain the dedicated coded key from the loading manager. Each silo has a corresponding key to avoid load transfer errors.
This solution can be used in conjunction with STI’s RFID key management panel, Smart Key Manager, to ensure optimum safety and traceability.

Electromechanical RGV

To connect this product to the silo, the operator has to liaise with the loading manager and wait for authorization from the control room before coupling the hose and starting to unload. Access to the coupling is granted directly from the control room.

Electrical contacts can be added to either version of the RGV to enable monitoring from the control room. Supervisors can see which RGVs have been made available to tanker drivers and those that have hose couplings attached.

New Dynamic Smart key management system offers real-time control and traceability

Mechanical RGV

To connect this product to the silo, the operator must obtain the dedicated coded key from the loading manager. Each silo has a corresponding key to avoid load transfer errors.
This solution can be used in conjunction with STI’s RFID key management panel, Smart Key Manager, to ensure optimum safety and traceability.

Electromechanical RGV

To connect this product to the silo, the operator has to liaise with the loading manager and wait for authorization from the control room before coupling the hose and starting to unload. Access to the coupling is granted directly from the control room.

Electrical contacts can be added to either version of the RGV to enable monitoring from the control room. Supervisors can see which RGVs have been made available to tanker drivers and those that have hose couplings attached.

New Dynamic Smart key management system offers real-time control and traceability

The Smart Key Manager uses RFID to guarantee high levels of security and productivity
A new security product that combines key management with real-time traceability. Using RFID technology to guarantee a high level of reliability, the Smart Key Manager can accept up to 16 key modules, controlling a total of 256 keys.

The product’s webserver interface allows the system to be checked and managed in real-time via a web browser from a PC, tablet or smartphone; no software needs to be installed. The system indicates which keys are present in or absent from the cabinet, who has taken each key and when. Via email, managers can choose to be kept informed of key movement, inform others and monitor several levels of administrators.
Full or partial access to keys can be given remotely via the interface, ensuring that individuals can only access keys relevant to them. The Smart Key Manager offers three levels of security by requiring users to prove their identity with a badge, PIN code or a combination of the two.
Aside from peace of mind, the system increases productivity as keys normally held by members of staff who are suddenly taken ill can be transferred to other workers.
When a user needs access to a key, they first need to prove their identity with their badge or PIN code. The control panel then displays the list of keys that the user is authorised to remove. The user chooses the appropriate key, waits for the key movement to be registered, and removes the key that is now free.
To return the key, the user holds the key fob in front of the control panel and the Smart Key Manager indicates where the key should be inserted and trapped.

Flexible Remote Valve Drive

Flexible Remote Drive is a versatile product consisting of two stations, joined by a  linear drive cable, which enables valves and other wheel operated devices in remote, hard-to-reach or hazardous locations to be operated with ease from a conveniently located handwheel. Flexible Remote Drive can be applied to any conventional wheel-operated valve/device. It is suitable for underwater use and the most extreme climatic conditions. The cable system can deliver torque output for most manual valve operations and transmits drive up to 30 metres from the operator station. The flexible cable system facilitates up to 540° of bends in the cable run.

Truck Docking Safety

SIGMA TRUCK IMMOBILIZER & INTERLOCKING

Loading and Unloading Risks

Loading, unloading and moving materials/goods from trucks are daily activities that, when done unsafely, can pose safety risks for everyone involved, from forklift operators and dock attendants to service technicians and bystanders, which might result in serious accidents and expensive insurance claims. Whether you are a small business owner or a large enterprise, an unsafe docking station affects the trailer transporter, the dock receiver/loader and/or any person within the dock work space.

As each facility might be totally different to others it is difficult to apply one standard solution for all, and wheel chocks is definitely not the answer.

We can  help you to make your docking stations and loading ramps or bays safe work spaces.

Safety system for truck loading

The system that guarantees vehicle immobilization

A system developed to ensure the safety of goods loading operations.

Advantages

  • A very simple and user friendly solution
  • Can be used on existing installations without civil works
  • Operators have to work with predetermined safety sequence
  • Easy to implement
  • No wiring needed
  • Fits all wheel types and sizes
  • Requires no maintenance

The new truck interlocking system, based on the key transfer principle, guarantees that the vehicle is completely immobilized for the duration of the operation. The system was developed in compliance with INRS brochure ED 6059 and according to CRAM (French regional health insurance fund) recommendations. It can be easily integrated into existing facilities.
Thanks to the key transfer principle, loading is only possible if forklift operators and/or drivers follow a predetermined safety procedure to immobilize the trailer. Forklift operators must follow this process before they can open the dock doors and/or operate the dock leveler to load or unload the cargo.
The truck shoe is easy to use and requires no upkeep or maintenance costs. It is suitable for all vehicle types, from rigid to semi-trailers, and for all wheel diameters.
Please note that it is also possible to interlock the truck immobilizer with the dock doors.
When loading the truck, the immobilizer is placed against the tyre and the lever is operated. After the immobilizer is hooked into the ground plate (two 2 meter metal plates are included in the system), pressure is applied to the wheel/immobilizer/ground plate system. Once there is sufficient pressure, the key is released from the immobilizer and the system is locked.

The ideal safety system for Distribution Centers. See video

TOP