Industrial Valve Solutions for Power Generation Plants
Main steam lines, feedwater systems, and cooling water circuits each place a different demand on a valve — extreme temperature, precise throttling, or zero-leakage shutoff over decades of continuous operation. CTGV manufactures high-temperature power plant valves — including steam valves, butterfly valves, globe valves, and isolation valves — rated up to 816°C for thermal, hydro, and combined-cycle power generation plants.
Matched to Your Plant Type & System
Different power generation systems expose valves to different combinations of temperature, pressure, and duty cycle. Select a scenario below to see the typical challenge and the valve CTGV recommends.
Main Steam & Flue Gas Isolation
Main steam lines and flue gas ducts in thermal power generation plants run continuously at extreme temperature, where standard valve seats and seals degrade rapidly. A valve that distorts or binds under thermal expansion can fail to close fully, costing the plant efficiency or forcing an unplanned outage to replace it.
The metal-seated, force-sealed triple offset design is built specifically to resist thermal binding at sustained high temperature — rated to 816°C, well above typical main steam conditions. Because the disc lifts cleanly away from the seat on opening, there is no sliding wear to accelerate seat degradation under thermal cycling, which keeps the valve sealing tight through repeated heating and cooling cycles over its service life.
Feedwater Control & Chemical Dosing
Feedwater treatment and chemical dosing lines need precise throttling, not just on/off control — and any external leakage at the stem packing risks releasing treatment chemicals or losing demineralised water that the plant has already paid to process. Packing-sealed valves typically need re-tightening or replacement as packing wears.
A globe valve's linear stem motion gives the precise, repeatable throttling that feedwater control demands, where a quarter-turn valve cannot match the same modulation accuracy. The bellows seal replaces traditional packing entirely, so there is no stem leak path — a maintenance-free seal rated for zero leakage under API 598, which matters directly on a system the plant is actively trying to avoid losing water or chemical product from.
Circulating Cooling Water Systems
Cooling water circuits run at large pipe diameters but comparatively low pressure, so a heavy gate or globe valve at this scale becomes costly, slow to operate, and difficult to actuate. The system also needs to isolate cleanly for condenser tube cleaning and seasonal maintenance without excessive downtime.
The concentric butterfly valve's lightweight, quarter-turn design is the standard solution for large-diameter, lower-pressure circuits like circulating cooling water, where it gives fast, low-torque operation at a fraction of the weight and cost of a comparable gate valve. This makes scheduled condenser isolation a routine quarter-turn operation rather than a multi-minute valve stroke.
Scheduled Maintenance Isolation
During a planned outage, maintenance crews need absolute certainty that a line section carries zero pressure and zero flow before work begins — a closed isolation valve alone is sometimes not considered sufficient assurance for confined-space entry or hot-work permits, since any valve can theoretically pass a small leak.
A blind valve provides a positive mechanical barrier across the full pipe bore, giving maintenance teams the same physical assurance as a blank flange but without the time and labour cost of breaking the line apart and reinstalling a blind spacer. This is the standard solution plants specify wherever a maintenance permit requires verified zero-energy isolation rather than just a closed valve.
Valve Products for Power Plant Systems
CTGV's power generation range spans high-temperature isolation, precision throttling, and maintenance isolation duty across thermal, hydro, and combined-cycle plant systems.
High Temperature Triple Offset Butterfly Valve
Model: GD-343X · FM/ULBody: CF8, CF8M, WC6, WC9, CK40
Temp: ≤816°C
Pressure: Up to 80.0 MPa
Metal-seated and fire-safe — the primary choice for main steam, flue gas, and thermal oil isolation duty.
View ProductBellows Sealed Globe Valve
API 598 · API 607 Fire TestedPressure: 150LB–900LB
Body: WCB, WC6, CF8, CF8M
Shutoff: Zero leakage, no packing
No stem leak path — ideal for feedwater control, chemical dosing, and other precision throttling points.
View Product
Angle Globe Valve
ASME B16.34 · API 623Pressure: 150LB–2500LB
Body: WCB, WC6, CF8, CF8M
Connection: Double Flanged, Butt Weld
90° flow path reduces pressure drop and saves space — suited to steam distribution systems with tight piping layouts.
View ProductBlind Valve
Positive Mechanical IsolationUse case: Scheduled outage isolation
Benefit: No line breakdown required
Operation: Manual or actuated
Provides verified zero-energy isolation for maintenance permits, without the labour cost of installing a blank flange.
View ProductA Typical Thermal Power Plant Flow
From boiler to condenser, each stage of the steam cycle places a different valve at a different duty point.
How a Steam Cycle Plant Moves From Fuel to Electricity
A typical thermal power plant converts fuel into electricity through a closed steam-water cycle, and each stage of that cycle carries its own valve duty. Combustion in the boiler raises water to high-temperature, high-pressure steam, which then travels through the main steam line to the turbine. As the steam expands across the turbine blades it loses pressure and temperature, driving the generator shaft before passing into the condenser, where it is cooled back into water by a continuous flow of circulating cooling water. The feedwater pump then returns that condensed water to the boiler to begin the cycle again, often after passing through chemical dosing to control corrosion and scaling.
Every transition in that cycle is a valve isolation or control point. The boiler and main steam line operate at the highest temperature and pressure in the plant, which is why CTGV's 816°C-rated triple offset butterfly valve is positioned there. The turbine inlet and steam distribution piping benefit from the angle globe valve's space-saving 90° flow path. The condenser's large-diameter, lower-pressure cooling water circuit is suited to a lightweight concentric butterfly valve, while the feedwater return line — where any external leakage wastes treated water — calls for the zero-leakage bellows sealed globe valve.
High-Temperature Triple Offset Valves for a Northern China District Heating Network
A district heating operator in northern China needed steam valves and isolation valves capable of handling the extreme seasonal temperature swing between summer shutdown and peak winter heating load, where lines cycle between -30°C and 120°C. Earlier power plant valve installations had developed seat leakage after only one or two heating seasons due to repeated thermal stress on conventional elastomer seals.
CTGV supplied high-temperature triple offset butterfly valves — rated to 600°C per CTGV's power generation valve range — engineered for this thermal cycling duty. The system has now completed three full heating seasons with zero leakage, and the improved metal-to-metal seal performance has measurably reduced heat loss across the network, demonstrating the reliability of CTGV power plant valves under sustained cyclic loading.
Manufacturer Capabilities & Certifications
Behind every CTGV power plant valve is a vertically integrated factory in Wenzhou covering casting, machining, assembly, and full-process testing under one roof — built to deliver the consistency that high-temperature plant specifications require.
Superior Manufacturing Capabilities
Annual production capacity of 20,000 tons, supported by over 500 sets of advanced production equipment and more than 300 sets of testing instruments covering the full process from raw material to finished valve.
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Strict Quality Certifications
Our quality management system is certified to ISO 9001, ISO 14001, and ISO 45001. High-temperature and bellows sealed products are tested to API 598 and API 607 fire-safe requirements before shipment.
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Global Market Presence
CTGV products are exported to the United States, Germany, Russia, the Middle East, and Southeast Asia. Our 80+ country sales network ensures buyers in any region can access technical support and spare parts.
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