10 Commandments to Develop the New Control Valve ECOTROL®. 10. 3. 1 2 diaphragm actuator FORBES MARSHALL ARCAPAQ 812 and a sturdy The ECOTROL® control valves are equipped with inner parts specially designed .. manual intervention and without opening the actuator housing. This design Operating Instructions - ARCA Regler Gmbh. arcavalve. Views. 6 years ago Reliability in Control Valves, Pumps & Cryogenics - Arca-Regler arcavalve. ECOTROL® range of control valves start with Wuzhong. Instrument Co. Ltd. in P.R. China, as well as with. METSO Automation for worldwide sales and service of. FORBES MARSHALL ARCA control valves and actuators are designed to cater to a variety of industrial control applications like steam, liquids and gases.To give you our best support, the operating and maintenance instructions for our control valves and actuators, other series as mentioned here, are compiled 1. General data. This operating manual contains instructions that enable the product to be safely and properly installed, put into operation and maintained. +49-(0)2156-7709-0 • Fax: +49-(0)2156-7709-55 • sale@arca-valve.com . (DN15-50 with DEK6 / DN80-100 with DEK1) + actuator without manual operation. 2. The notices referring to your personal safety are highlighted in the manual by a .. Note that before working on the control valve, you must first move it to the