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ASCO™ Series RCS Redundant Control System
Redundant Control System_2oo2_2oo3
The ASCO Series RCS redundant control system is a pilot valve system with no single point of failure that can result in unwanted closure of the process valve.
It is suitable for use in SIL 3 applications and greatly reduces spurious trip rates. The ASCO Series RCS achieves a higher level of process safety and reliability by using a redundant, fault-tolerant architecture, high diagnostic coverage, and automated testing. It is available in a variety of constructions that provide valve diagnostics through automated, partial-stroke testing. The availability and reliability of The ASCO Series RCS provides the customer´s best choice for process valve diagnostics and actuation.
ASCO™ Series RCS Redundant Control System


Valve Actuation
Solenoid - Air Pilot
Body Material
Aluminum, Engineered Plastics, Stainless Steel
Air, Inert Gas
Port Type
Redundant valves in 2oo2 or 2oo3 configuration (Normally Closed or Normally Open)
From 2.0 Cv to 3.0 Cv (Process to Exhaust Cv typical in Normally Closed constructions)
110 AC, 120 AC, 230 AC, 12 DC, 24 DC, 48 DC, 120 DC
Max Differential / Max Operating Pressure
Vacuum to 150 PSIG
Operating Environment
Corrosive, Hazardous, Indoor, Outdoor
Operating Environment
Standards / Regulations
IEC 60529 (Ingress protection), ATEX, ISO, IP65


  • Keyed bypass allows on-line maintenance without process interruption
  • High safety availability
  • No nuisance trips
  • Optional stainless-steel construction


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