{"id":1107,"date":"2026-09-23T01:14:09","date_gmt":"2026-09-23T01:14:09","guid":{"rendered":"https:\/\/wdlvalve.com\/?p=1107"},"modified":"2026-10-08T13:19:40","modified_gmt":"2026-10-08T13:19:40","slug":"%d8%b5%d9%85%d8%a7%d9%85%d8%a7%d8%aa-%d8%aa%d9%88%d9%84%d9%8a%d8%af-%d8%a7%d9%84%d8%b7%d8%a7%d9%82%d8%a9","status":"publish","type":"post","link":"https:\/\/wdlvalve.com\/ar\/%d8%b5%d9%85%d8%a7%d9%85%d8%a7%d8%aa-%d8%aa%d9%88%d9%84%d9%8a%d8%af-%d8%a7%d9%84%d8%b7%d8%a7%d9%82%d8%a9\/","title":{"rendered":"\u0635\u0645\u0627\u0645\u0627\u062a \u062a\u0648\u0644\u064a\u062f \u0627\u0644\u0637\u0627\u0642\u0629: \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a \u0648\u0627\u0644\u0623\u0646\u0648\u0627\u0639 \u0648\u062f\u0644\u064a\u0644 \u0627\u0644\u0627\u062e\u062a\u064a\u0627\u0631"},"content":{"rendered":"

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Power generation valves isolate equipment, regulate flow and prevent reverse flow in steam, feedwater, cooling water, condensate, fuel and auxiliary systems. Selecting the correct valve requires matching its pressure class, temperature rating, body material, trim, seat design and actuator to the exact operating point.<\/p>\n

WDL Valve<\/strong> supplies gate, globe, check, ball, butterfly and control valves for thermal, hydroelectric and industrial power plants.<\/p>\n<\/header>\n

 <\/p>\n

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Where Are Valves Used in a Power Plant?<\/h2>\n

Each plant system places different demands on a valve. Main-steam lines require high-temperature strength and reliable shutoff, while cooling-water systems often need economical large-diameter valves with low pressure loss.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n
Plant System<\/th>\n\u0645\u0647\u0627\u0645 \u0634\u0631\u0643\u0629 Valve<\/th>\nTypical Conditions<\/th>\n\u0623\u0646\u0648\u0627\u0639 \u0627\u0644\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0634\u0627\u0626\u0639\u0629<\/th>\n<\/tr>\n<\/thead>\n
Main and reheat steam<\/td>\nIsolation and regulation<\/td>\nHigh pressure, high temperature and thermal cycling<\/td>\nGate, globe and control valves<\/td>\n<\/tr>\n
Boiler feedwater<\/td>\nIsolation, throttling and pump protection<\/td>\nHigh pressure, velocity and possible cavitation<\/td>\n\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0628\u0648\u0627\u0628\u0629\u060c \u0648\u0627\u0644\u0643\u0631\u0629\u060c \u0648\u0627\u0644\u062a\u062d\u0642\u0642\u060c \u0648\u0627\u0644\u062a\u062d\u0643\u0645<\/td>\n<\/tr>\n
Condensate<\/td>\nIsolation and non-return<\/td>\nTemperature changes and low-pressure sections<\/td>\n\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0628\u0648\u0627\u0628\u0629\u060c \u0648\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0643\u0631\u0629\u060c \u0648\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0641\u062d\u0635<\/td>\n<\/tr>\n
Cooling water<\/td>\nLarge-line isolation and flow control<\/td>\nContinuous service, corrosion and fouling<\/td>\n\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0641\u0631\u0627\u0634\u0629\u060c \u0648\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0628\u0648\u0627\u0628\u0629\u060c \u0648\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0641\u062d\u0635<\/td>\n<\/tr>\n
Fuel gas and fuel oil<\/td>\nTight isolation and controlled delivery<\/td>\nFlammable media and frequent operation<\/td>\nBall, gate and control valves<\/td>\n<\/tr>\n
Hydroelectric systems<\/td>\nWater isolation and turbine protection<\/td>\nLarge diameters, high flow and water hammer<\/td>\nButterfly, gate and control valves<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n
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WDL Valves for Power Generation Service<\/h2>\n

The following WDL products illustrate valve designs commonly considered for high-pressure, high-temperature, non-return and tight-isolation duties. Review our \u0634\u0631\u0643\u0629 \u0645\u0635\u0646\u0639\u0629 \u0644\u0644\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0645\u0635\u0646\u0648\u0639\u0629 \u0645\u0646 \u0627\u0644\u0641\u0648\u0644\u0627\u0630 \u0627\u0644\u0645\u0637\u0631\u0648\u0642<\/a> capabilities for compact high-pressure gate and globe valve options. Final selection must be confirmed against the project datasheet.<\/p>\n


\n\"WDL
\n\u0635\u0645\u0627\u0645 \u0628\u0648\u0627\u0628\u0629 \u0645\u0646 \u0627\u0644\u0641\u0648\u0644\u0627\u0630 \u0627\u0644\u0645\u0637\u0631\u0648\u0642 \u0630\u0627\u062a\u064a \u0627\u0644\u0625\u063a\u0644\u0627\u0642<\/strong>
\nHigh-pressure line isolation<\/span><\/a>
\n\"WDL
\nSelf-Sealing Forged Steel Globe Valve<\/strong>
\n\u0627\u0644\u0639\u0632\u0644 \u0648\u062a\u0646\u0638\u064a\u0645 \u0627\u0644\u062a\u062f\u0641\u0642<\/span><\/a>
\n\"WDL
\n\u0635\u0645\u0627\u0645 \u0643\u0631\u0648\u064a \u0628\u0645\u0642\u0639\u062f \u0645\u0639\u062f\u0646\u064a \u0645\u0642\u0627\u0648\u0645 \u0644\u062f\u0631\u062c\u0627\u062a \u0627\u0644\u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u0639\u0627\u0644\u064a\u0629<\/strong>
\nTight isolation in demanding service<\/span>
\n<\/a><\/div>\n<\/section>\n
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Which Valve Types Are Used in Power Plants?<\/h2>\n

\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0628\u0648\u0627\u0628\u0629<\/a><\/h3>\n

Gate valves provide full-bore isolation with low flow resistance. They suit main steam, feedwater and auxiliary pipelines but should normally operate fully open or fully closed rather than throttle continuously.<\/p>\n

\u0627\u0644\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0643\u0631\u0648\u064a\u0629<\/a><\/h3>\n

Globe valves are well suited to throttling, bypass, drain and feedwater duties. Their flow path produces more pressure drop than a gate valve, but provides better regulation.<\/p>\n

\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0641\u062d\u0635<\/a><\/h3>\n

Check valves close automatically when flow reverses. Correct sizing and closing characteristics help protect pumps, boilers and piping while reducing slam and water-hammer risk.<\/p>\n

\u0627\u0644\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0643\u0631\u0648\u064a\u0629<\/a><\/h3>\n

Ball valves offer quick operation and tight shutoff for fuel, drain and auxiliary systems. Metal seats may be required where temperature, particles or frequent cycling exceed the limits of soft seats.<\/p>\n

\u0627\u0644\u0635\u0645\u0627\u0645\u0627\u062a \u0627\u0644\u0641\u0631\u0627\u0634\u064a\u0629<\/a><\/h3>\n

Butterfly valves are compact and economical for large cooling-water and hydroelectric lines. Double- or triple-offset designs can improve sealing and reduce seat wear in more demanding conditions.<\/p>\n<\/section>\n

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How Should Power Generation Valves Be Selected?<\/h2>\n
    \n
  1. Define the medium:<\/strong> steam, water, condensate, fuel gas, fuel oil or chemical.<\/li>\n
  2. \u0627\u0644\u062a\u0623\u0643\u062f \u0645\u0646 \u0634\u0631\u0648\u0637 \u0627\u0644\u062a\u0635\u0645\u064a\u0645:<\/strong> normal, maximum and transient pressure and temperature.<\/li>\n
  3. Choose the function:<\/strong> isolation, throttling, non-return, pressure reduction or emergency shutdown.<\/li>\n
  4. Select materials:<\/strong> carbon steel, chromium-molybdenum alloy steel, stainless steel or another specified alloy.<\/li>\n
  5. Specify trim and seat:<\/strong> consider erosion, cavitation, corrosion, leakage class and cycling frequency.<\/li>\n
  6. Choose actuation:<\/strong> \u064a\u062f\u0648\u064a\u060c \u0643\u0647\u0631\u0628\u0627\u0626\u064a\u060c \u0647\u0648\u0627\u0626\u064a \u0623\u0648 \u0647\u064a\u062f\u0631\u0648\u0644\u064a\u0643\u064a\u060c \u0628\u0645\u0627 \u0641\u064a \u0630\u0644\u0643 \u0648\u0636\u0639 \u0627\u0644\u0623\u0645\u0627\u0646 \u0648\u0648\u0642\u062a \u0627\u0644\u0625\u063a\u0644\u0627\u0642.<\/li>\n<\/ol>\n
    \n\n\n\n\n\n\n\n\n
    Selection Factor<\/th>\nWhy It Matters<\/th>\nInformation to Provide<\/th>\n<\/tr>\n<\/thead>\n
    Pressure and temperature<\/td>\nDetermine pressure class, wall thickness and material strength<\/td>\nDesign and operating values<\/td>\n<\/tr>\n
    Flow and pressure drop<\/td>\nAffect valve size, velocity, noise and cavitation<\/td>\nMinimum, normal and maximum flow<\/td>\n<\/tr>\n
    Shutoff requirement<\/td>\nControls seat construction and leakage class<\/td>\nRequired leakage standard or class<\/td>\n<\/tr>\n
    \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\nDetermines actuator torque, speed and fail action<\/td>\nCycle rate, power supply and control signal<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n
    \n

    Materials, Seats and Severe-Service Risks<\/h2>\n

    Carbon steel is widely used for general power-plant piping. Chromium-molybdenum alloy steels are often considered for elevated-temperature steam service, while stainless or higher alloys may be selected where corrosion or water chemistry requires them. Material suitability must always be checked against the applicable pressure-temperature rating.<\/p>\n

    Important risks include thermal expansion, rapid cycling, erosion, cavitation, flashing, water hammer and stem-packing leakage. A valve that is suitable at steady conditions may still fail early if startup, shutdown or upset conditions are ignored.<\/p>\n

    Valve design and ratings may be specified to recognized requirements such as ASME B16.34<\/a>. Project specifications may also reference API, ISO or local requirements. For industry background, see the U.S. Energy Information Administration electricity overview<\/a> \u0648\u0640 International Energy Agency hydropower overview<\/a>.<\/p>\n<\/section>\n

    \n

    \u0627\u0644\u0645\u0639\u0644\u0648\u0645\u0627\u062a \u0627\u0644\u0645\u0637\u0644\u0648\u0628\u0629 \u0644\u0625\u0639\u062f\u0627\u062f \u0639\u0631\u0636 \u0623\u0633\u0639\u0627\u0631 \u0627\u0644\u0635\u0645\u0627\u0645\u0627\u062a<\/h2>\n

    To receive an accurate valve proposal, provide the following information:<\/p>\n