Projects

Actuation of various new and existing valves for the City of Cape Town

DEMCA Actuation Solutions were awarded various actuation tenders for the City of Cape Town, involving the actuation of new valves, as well as the actuation of existing valves (which in some cases were over 50 years old.) The DAS AVA Intelligent Actuator, fully meets with the City Of Cape Town's actuation requirements and specification, and also offers unique additional features such as Intelligent Valve Jam Protection and a Partial Stroke Function, which can be activated as per the customer's requirements.

Additional features such as Current Position Transmission (via 4 to 20 milliamp feedback), and an Interrupted Timer, are also supplied as standard, at no additional charge.

DEMCA's ability to provide a complete and cost effective actuation solution, was further illustrated at a City of Cape Town Reservoir, where the cost of laying the necessary control cabling for the required actuator, was considerable. In response to the City's concerns, DEMCA (In association with Kaylan Automation) offered a wireless control system. Because the actuator is situated some 300 metres from the supervisors office, on the other side of the reservoir, it was decided for convenience sake, to install a remote control link to the actuator for opening and closing the valve, as well as to provide 4 to 20 milliamp indication of the valve position. There are no existing wire-ways or cable routes that could be followed in order to install a control cable for the remote control of the actuator, and therefore a radio link has been installed. The Radio Gateway has “line of site” to the Banner Radio Node that has been mounted on a mast on the other side of the reservoir, close to the location of the actuator.



Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc.

Mining Project for the DRC

DEMCA Actuation Solutions received an order from a local South Africa Valve Supplier, for DAS AVA multi-turn intelligent electric actuators, DAS OM quarter turn actuators and the DAS SH Quarter turn failsafe actuators.
The DAS AVA Intelligent Actuator, offer a high specification actuation solution to multi-turn actuation applications - and also offers unique additional features such as Intelligent Valve Jam Protection and a Partial Stroke Function, which can be activated as per the customer's requirements.
Additional features such as Current Position Transmission (via 4 to 20 milliamp feedback), and an Interrupted Timer, are also supplied as standard, at no additional charge.
The DAS AVA Actuator is a "package" requiring only a power supply and control cabling in order to fully actuate and monitor valve position. The DAS OM Range of actuators offer an inexpensive reliable quarter turn actuation solution for ball valves, butterfly valves and dampers – truly a fit and forget solution.
The DAS SH Quarter turn failsafe actuators utilise a spring return failsafe system in order to reach a failsafe position in the event of a loss of power.



Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc.

Fire fighting Automation Projects for major South African Oil Company

DEMCA Actuation Solutions received an order from a Gauteng based contractor for the supply of AMRI Butterfly valves with hazardous area qualified actuators. The DAS V Range of actuators provide an inexpensive solution to hazardous area applications with the added benefit of having a failsafe option if required. The DAS V Failsafe range utilise an internal battery backup to provide failsafe operation in the event of a loss of power. They are also supplied as standard with a fault relay to provide indication to the PLC as to the actuators availability to be sent an operation signal. Available in a variety of voltages, they can provide an actuation solution to any quarter turn application from 0 to 300Nm’s. Following the success of the first order to supply, and additional order was placed for another depot.



Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc.

Actuation Project for the Nelson Mandela Bay Municipality

DEMCA Actuation Solutions received an order from a Gauteng based contractor to supply butterfly valves with electric quarter turn actuators. Due to the location of the site being right next to the coast, and the extremely corrosive waste water environment, DEMCA were asked to supply actuators with a special marine coat paint spec. The DAS OM Actuators completely meet with the customer’s requirements offering an inexpensive reliable quarter turn actuation solution.

Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc.

Automation Projects at various depots for major South African Oil Company

A major oil company were dissatisfied with the lack of after sales service they were receiving with regards to a tank farm SCADA system, recently supplied and installed by a valve actuator company.

Due to DEMCA ACTUATION SOLUTION’s experience with this same actuator and SCADA product, we were approached for comment as well as suggestions of a possible alternative to the troublesome installation.

A requirement of the client was that any alternatives offered must be from a manufacturer of electric actuators that have their own propriety SCADA system.

Whilst most electric actuator manufacturers can offer as an option a variety of fieldbus cards to enable their actuators to integrate with fieldbus systems e.g. Modbus, Profibus, Foundation Fieldbus, etc. Not all manufacture their own SCADA system.

With DEMCA’s extensive knowledge of the major electric actuator manufacturers we proposed the AUMA SIMA SCADA SYSTEM along with their hazardous enclosure actuators to replace the existing actuators and supervisory system.

After a tender process DEMCA received an instruction to commence with our offer for the supply, installation and commissioning of actuators and SCADA for the Inlet, Outlet and Manifold valves at the Gauteng Tank Farm.

The contract also included for the supply and installation of all necessary power and communications cabling and terminations.

The contract was successfully completed and handed over to the customer in January 2012.

As a result of the success of the project DEMCA received a further contract to supply, install and commission electric actuators and SCADA system including all power and communications requirements for tank farms located in the Eastern Cape, Ladysmith, Bethlehem and Nelspruit.



Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc.


Exhibitions

Pumps, Valves and Pipes Africa 2013

DEMCA Actuation Solutions were present at the 8th International Pumps, Valves and Pipes Africa Expo at Gallagher Convention Centre from the 14th to the 16th May 2013.

The exhibition provided DEMCA with the opportunity to showcase their multi-turn and quarter turn actuator ranges to representatives from the Water and Waste Water Industries.

Mr Alan Marnitz from Kaylan Automation also had the opportunity to demonstrate wireless automation of both the AVA Multi-turn and AVAR Quarter turn actuators.

Both actuators were equipped with Modbus cards, which were sent wireless signals via a modem to open and close. A 4 to 20 milliamp signal from the Current Position Transmitters (which are fitted as standard in the Greatork AVA and AVAR Actuators) was transmitted from the actuators to indicate the valve position. The system was further modified during the show to enable signals to be sent to the actuator via cellphone sms.



Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc. Demca Actuation Solutions: Valves, Water treatment, etc.

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