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Valve & Automation have been supplying manual, on/off and control valves for power generation plants for more than 25 years. 15 years ago a Pump Protection Valve (also known as Automatic Re-circulation Valves or Leak Off Valves with more than 160 bar pump pressure was an exception. Today applications with more than 200 bar pump pressure are nothing special, more or less daily business. A liquid, particularly hot water with an inertial pressure of more than 200 bar has an enormous energy content and consequently a very high potential for wear and destruction in case of an uncontrolled pressure breakdown. The catchword here is cavitation as the most destructive kind of wear. Only a few hours under full cavitation conditions can seriously damage or even destroy effected parts like a valve trim a pump impeller or the ARC-valve bypass. It is with this in mind Schroeder designed the SHP series for modern operating conditions where high fluctuating loads and long periods of operation under extreme partial load conditions are required. Engineers need to ensure that critical pumps remain fully operational and are protected during minimum flow conditions. V&A regularly supply solutions to Eskom power generation plants as well as power plants within Sasol, Sappi and Mondi as well as Sulzer and KSB who manufacture critical pumps for these world class facilities.

For high pressure steam and condensate applications up to PN640 HP Valves in forged steel are the ideal solution. Chemical dosing and handling within the demin plant requires the Richter fully lined valveArca control valves are capable of addressing the needs of all pressure reductionsteam conditioning and temperature reduction within power plants. In applications where a Turbine ESD is required, the triple eccentric Tri-Con metal seated rotary process valve provides fast operation as well as zero leakage.

Fly Ash is another challenge engineers face in production as there is residue and waste. Fly ash is fine powder found in plant exhaust gases exiting the boiler and it is removed before the gas is discharged to atmosphere. It is difficult to handle and is harmful. The fly ash is generally collected in electrostatic precipitator hoppers and then fed into a conveying system. The isolating valve under a ash hopper is normally in open position and it have to close on a static column of ash, without using extreme force or any other unsafe practises. Stafsjö have resigned the HG series knife gate valve is an ideal solution for Fly Ash management.


Valve Selection for Power in General

M = Manual    O = On/Off    C = Modulating Control


Application / Media MOCV&A Solution
SeriesType
Attemperator Spray Water Valve Arca Artes Injection Desuperheater
Automatic Recirculation Valves (ARC Valves) Schroeder Minimum flow recirculation valves
Blow-down & Venting Pibiviesse Cage-Ball™ Control Ball Valve
Arca Artes High Pressure Control Valve
Chemical handling (demin plant) Richter Lined Ball & Butterfly Valves
Deaerator level control valve Pibiviesse Cage-Ball™ Control Ball Valve
Arca Artes High Pressure Control Valve
Demin water Richter Lined Ball valve
Emergency Shut Down (ESD) Solutions Zwick Tri-Con Triple Eccentric / Triple Offset Rotary Process Valve
Pibiviesse Trunnion Mounted Ball Valves
Feedwater Control Arca Artes Ecotrol Globe Control Valve
Eccentric Plug Control Valve
Feedwater Heater Drains Pibiviesse Cage-Ball™ Control Ball Valve
Arca Artes High Pressure Control Valve
Flow Balancing control valve Pibiviesse Cage-Ball™ Control Ball Valve
Arca Artes High Pressure Control Valve
Fly Ash Stafsjö HG series knife gate valve
Fuel Gas Eccentric Plug Control Valve
Start-up Feedwater Control Valves Pibiviesse Cage-Ball™ Control Ball Valve
Arca Artes High Pressure Control Valve
Leak Off Valves Schroeder Minimum flow recirculation valves
Main Steam Pipe Drain Valve Pibiviesse Cage-Ball™ Control Ball Valve
Arca Artes High Pressure Control Valve
Manual Isolation - LP JC Valves Red. & Full Bore Ball Valves
NAF Torex H.P. Metal Seat Butterfly Valve
Zwick Tri-Con Triple Eccentric / Triple Offset Rotary Process Valve
Pibiviesse Trunnion Mounted Ball Valves
Manual Isolation - HP Zwick Tri-Con Triple Eccentric / Triple Offset Rotary Process Valve
Pibiviesse Trunnion Mounted Ball Valves
Non Return NAF Swing check
Pressure Control Pibiviesse Cage-Ball™ Control Ball Valve
Pump Protection (Min Flow Protection) Schroeder Minimum flow recirculation valves
Start-up Drum Control Valves Pibiviesse Cage-Ball™ Control Ball Valve
Arca Artes High Pressure Control Valve
Steam - Conditioning Arca Artes PRDS Steam Conditioning stations
Steam - Desuperheating Arca Artes Artes injection desuperheaters
Steam - High Pressure Gate Valves HP Valves High Pressure Gate Valves PN160-640
Steam - High Pressure Globe Valves HP Valves High Pressure Gate Valves PN160-640
Steam - High Pressure Check HP Valves High Pressure Check Valves PN160-640
Steam - High Pressure Continuous Blow Down HP Valves High Pressure Continuous Blow Down Valve PN160-640
Steam - High Pressure Throttling Flow HP Valves High Pressure Throttling Valve PN160-640
Sulphur Tail Gas Zwick Tri-Con Triple Eccentric / Triple Offset Rotary Process Valve
Slurries Stafsjö SLV series knife gate valve
Velocity Control Pibiviesse Cage-Ball™ Control Ball Valve
Valve Positioners V&A iCon Valve Rotary & Linear Positioners
Valve Partial Stroke Testing (ESD) V&A iCon Valve Partial Stroke Testing (ESD)