Methods and systems of failure protection for automated valves

A method of failure protection for automated valves of an isolation network comprising a control system, a network valve having a control device, a primary valve system, and a secondary valve system,

• wherein the primary valve system comprises a primary support valve and a primary supply system configured to supply control fluid to the primary support valve, which is used to control an opening/closing operation of the network valve,
• wherein the secondary valve system comprises a secondary support valve and a secondary supply system configured to supply control fluid to the secondary support valve, which is used to control an opening/closing operation of the network valve,
• wherein the primary support valve is operatively connected to the network valve, via the secondary support valve, such that the secondary support valve controls whether control fluid is supplied to the network valve from the primary supply system or the secondary supply system,
• wherein the primary valve system and secondary valve system are operatively connected to the control system, and
• the method comprising:
• detecting, by the control system, a feedback signal that indicates whether the network valve is open or closed/closing;
• upon detecting the network valve is closed/closing, determining, by the control system, whether a closing command was issued;
• initiating the secondary valve system based on the determination of whether the closing command was issued,
• wherein if the closing command was issued:
• stopping control fluid flow from the primary supply system to the network valve, and
• stopping control fluid flow from the secondary supply system to the network valve,
• thereby closing or maintaining closed the network valve;
• wherein if the closing command was not issued:
• stopping control fluid flow from the primary supply system to the network valve, and
• opening the secondary support valve so as to allow control fluid flow from the secondary supply system to the network valve,
• thereby opening the network valve based on the control fluid flow from the secondary supply system.