ꂃ ꁹ
ꁆ ꁇ
Products breif:
The extraction steam check valve is a specialized rapid-action valve designed to protect turbo-generator units. 
It prevents the reverse flow of steam from extraction pipelines and heat exchangers back into the turbine during sudden load shedding, when the turbine pressure drops sharply. 
This ensures operational safety and system stability.

  •    Description   

    The extraction steam check valve is a specialized rapid-acting valve designed to protect turbo-generator units. It prevents reverse steam flow from extraction pipelines and heat exchangers back into the turbine during sudden load shedding events, when turbine pressure drops abruptly. This eliminates the risk of turbine blade reversal (at speeds exceeding 3000 RPM), which could cause blade failure and turbo-generator damage. The valve also mitigates water hammer effects that may occur if water leaks into the turbine due to heater system failures. In such scenarios, the valve closes within 0.5 seconds.

    Pneumatic Actuation: The pneumatic check valve opens via compressed air, which acts on a piston within a cylinder. The piston, connected to a yoke, rotates the stem to open the valve. Closure is achieved by a spring mechanism once the air supply is cut off by the solenoid valve.

    Sealing Surfaces: The sealing surfaces of the disc and seat are coated with advanced hard-facing materials, offering exceptional wear resistance and anti-galling properties.

    Stem Sealing: A high-performance modern packing material ensures reliable sealing and smooth operation.

     

      Key Features   

    • Ultra-Fast Response: Closes within 0.5 seconds to prevent reverse rotation and water hammer.
    • Critical Protection: Safeguards turbine blades from mechanical damage and catastrophic failure.
    • Automatic Operation: Functions without external intervention based on pressure differentials.
    • Fast and Reliable Operation: Combines pneumatic power for opening with spring-assisted closing for rapid response.
    • Durable Sealing: Advanced materials extend service life under high-wear conditions.
    • Low Maintenance: Efficient packing reduces friction and simplifies control.

     

      Applications   

    • Turbo-generator extraction steam systems.
    • Power plant auxiliary pipelines and heat exchange networks.
    • Industrial pneumatic systems requiring quick shut-off.
    • Environments where reliability and durability are critical.

     

       Parameters   

    • Product Standards:  JB/T 3595, NB/T 47044, ASME B16.34
    • Pressure Rating: PN16-PN420 (150LB-2500LB)
    • Nominal Diameter: DN50-DN500 (2"-20")
    • Body Material: WCB, ZG20CrMo, ZG15Cr1Mo1V, ASTM A217 WC6, ASTM A217 WC9
    • Operating Temperature:
    • WCB: -29°C ~ 425°C
    • Alloy Steel: -29°C ~ 540°C, -29°C ~ 570°C
    • Working Media: Water, Steam
    • Connection Type: Flanged, Welded
    • Actuation Type: Handwheel, Worm Gear, Pneumatic, Electric
Thermal Insulation Ball Valves
A Thermal Insulation Ball Valve, commonly referred to as a jacketed ball valve or steam-traced ball valve, is a specialized fluid control device engineered to maintain the temperature of the media within the pipeline. It is designed to prevent media solidification, crystallization, or excessive viscosity increase that can occur due to heat loss in process environments, particularly those handling high-viscosity fluids like heavy oils, resins, molten sulfur, or certain chemicals.
¥ 0.00
Forged Steel Three-Way Ball Valve
A Forged Steel Three-Way Ball Valve is a high-performance industrial valve designed for complex flow direction and diversion applications. Manufactured from forged carbon or stainless steel, it is built to withstand high pressures, temperature extremes, and demanding service conditions prevalent in sectors such as oil and gas, petrochemical, power generation, and hydrocarbon processing.
¥ 0.00
42MPa High-Pressure Water Single-Acting Pneumatic Ball Valve
This document describes a 42MPa (6,000 PSI) high-pressure ball valve, specifically engineered for critical water injection and control services in demanding applications such as power generation (e.g., boiler feedwater), petrochemical, and high-pressure processing plants. The valve integrates a robust ball valve design with a single-acting pneumatic spring-return actuator, ensuring reliable operation and fail-safe functionality under extreme pressure conditions.
¥ 0.00
Cryogenic Repairable Butterfly Valve
A cryogenic side-entry with Maintenance window, repairable butterfly valve is an advanced quarter-turn valve engineered for critical isolation duties in ultra-low temperature applications, typically ranging from -50°C (-58°F) down to -196°C (-321°F) and beyond. Its defining characteristic is a side-entry body with Maintenance window that allows for full in-line maintenance and replacement of internal components without requiring the valve to be removed from the pipeline.
¥ 0.00
Cryogenic Butterfly Valve
A cryogenic butterfly valve is an engineered quarter-turn valve specifically designed to regulate or isolate the flow of media in piping systems operating at extremely low temperatures, typically from -50°C (-58°F) down to -196°C (-321°F). These valves are characterized by their compact design, lightweight construction, and rapid operation, making them an efficient and cost-effective solution for a wide range of cryogenic applications.
¥ 0.00
Cryogenic Gate Valve
A cryogenic gate valve is a specialized type of industrial valve designed to isolate or permit fluid flow in piping systems handling media at extremely low temperatures, typically ranging from -50°C (-58°F) down to -196°C (-321°F) and even lower. These valves are critical components in industries such as Liquefied Natural Gas (LNG), industrial gases, aerospace, and chemical processing, where reliable shut-off under cryogenic conditions is paramount for safety and operational efficiency.
¥ 0.00
Dual Plate Check Valve
Our Dual Plate Check Valve is an advanced, highly efficient flow control solution designed to prevent reverse flow and protect critical system components in piping networks. Engineered for superior performance, it features two spring-assisted semi-circular plates (discs) hinged on a central pin. This compact, wafer-style/lug-style/flange-style design is engineered to fit securely between standard ANSI/ASME or DIN or GB/T flanges,
¥ 0.00
Lined Dual Plate Wafer Check Valve
Our Lined Dual Plate Wafer Check Valve is an engineered solution designed specifically for handling highly corrosive, abrasive, or chemically aggressive media in demanding industrial processes. This valve integrates the space-saving, efficient design of a standard dual plate check valve with a complete internal lining of inert fluoropolymer materials, such as PTFE (Polytetrafluoroethylene) or PFA (Perfluoroalkoxy). This construction creates a robust barrier, protecting the metallic valve body fr
¥ 0.00
Insulated Butterfly Valve
An Insulated Butterfly Valve, also known as a 'Jacketed Butterfly Valve' or 'Steam Traced Butterfly Valve', is a highly specialized type of industrial valve designed to maintain, raise, or control the temperature of the process media flowing through a pipeline. Its primary function is to prevent the congealing, solidification, or unwanted cooling of viscous fluids like heavy crude oil, bitumen, resins, wax, chocolate, or various chemicals.
¥ 0.00
Big Size Metal Seal Butterflly Valve
Products breif:
1. The three-eccentric design provides instant contact or disconnection of the disc from the saddle, which guarantees zero wear and zero leakage.
2. The sealing ring is fully integrated into the drive, which allows to carry out replacement without dismantling the whole valve, the...
¥ 0.00
ANSI Butterfly Valve
Products breif:
1. The three-eccentric design provides instant contact or disconnection of the disc from the saddle, which guarantees zero wear and zero leakage.
2. The sealing ring is fully integrated into the drive, which allows to carry out replacement without dismantling the whole valve, the...
¥ 0.00
High Pressure Butterfly Valve
1.  The three-eccentric design provides instant contact or disconnection of the disc from the saddle, which guarantees zero wear and zero leakage.
2.  The sealing ring is fully integrated into the drive, allowing replacement without dismantling the entire valve, significantly reducing maintenance costs.
3.  The sealing ring consists of laminated stainless steel metal plates and flexible graphite plates (graphito-rubber, asbestos-rubber, etc.), combining the advantages of metal rigid sealing an
¥ 0.00
Big Size Rubber LIned Butterfly Valve
1.  The central line design provides instant contact or stable seal for both sides, which guarantees zero wear and zero leakage.
2.  The sealing ring consists of rubber, providing excellent sealing properties at both low and high flow rating.
3.  The selection of suitable materials makes the valve resistant to low/high flow rating and corrosion.
¥ 0.00
Slow-Closing Damper Check Valve
Our Series HQ Slow-Closing Damper Check Valve is an engineered solution designed to prevent destructive water hammer in pump discharge and high-head fluid systems. Unlike standard check valves that close abruptly upon flow reversal, this valve features an external weighted lever and damping system that ensures a controlled, two-stage closing sequence. This critical functionality protects pipelines, pumps, and connected equipment from dangerous pressure surges (slam), significantly enhancing syst
¥ 0.00
Forged Steel Small-Bore Valves Series
Our Series FSV-SB Forged Steel Valves are engineered for superior performance in high-pressure, high-temperature, and critical service applications where reliability is non-negotiable. Designed for small-bore piping systems (NPS ½" to 2"), these valves leverage the inherent strength of forged construction to provide exceptional integrity, leak-proof operation, and extended service life in the most demanding environments, including oil and gas, petrochemical, power generation, and refining.
¥ 0.00
Y Type Strainer
A Y-type Strainer, also known as a Y-Filter, is an essential industrial component designed to remove solid particles from fluids (liquids or gases) in pipeline systems. Its name derives from its distinctive Y-shaped configuration, which allows for efficient filtration while minimizing pressure drop.
¥ 0.00
Check Valve
Products breif:
1. Using solidwork and Finite Element Analysis design tools, optimize working parts moving action.
2. COSMOSXpress software help engineer to optimize valve's structure.
3. Flow simulation simulate medium's flowing action, heat transfer process, and help engineer to decrease cavation, make less flowing resistance.
¥ 0.00
Fire Arrester
Products breif:
Designed to protect against deflagration and detonation, capable of stopping the propagation of subsonic flame speeds.
¥ 0.00
High-Temperature Nickel Alloy Globe Valves
Products breif:
Due to structural characteristics, globe valves exhibit high flow resistance and significant pressure drop.
The sealing surface materials of the disc and seat must resist corrosion, erosion, and maintain hardness at high temperatures. Therefore, the sealing surfaces are hard-faced to enhance wear and galling resistance, extending the seal service life.  
¥ 0.00
High-Temperature Nickel Alloy Check Valves
Products breif:
To meet high requirements for sealing, reliability, and safety, the valve body is manufactured using integral forging or forging with welding from nickel alloy.
The sealing surfaces are hard-faced with cobalt-based alloy (e.g., Stellite) to ensure wear resistance and high-temperature stability.
The valve design incorporates a spring-assisted quick closure mechanism to prevent reverse flow and water hammer in high-temperature systems.
¥ 0.00
PTFE Lined Ball Valve
Products breif:
1. Suitable for industrial pipelines requiring minimal flow resistance and frequent operation, such as water treatment, HVAC, and general chemical processes.
2. For Water, steam, oil, natural gas, corrosive fluids
¥ 0.00
Parallel Gate Valve
Products breif:
1. Floating Double-Block Seats: Utilizes floating double-block-and-bleed seats to ensure reliable sealing. The seats incorporate resilient sealing pads internally, enhancing low-pressure sealing performance and providing fire-safe functionality.
2. Emergency Sealant Injection: The valve is equipped with an emergency sealant injection system, allowing temporary sealing in case of accidental damage to the sealing surfaces, ensuring continued operation and safety.
¥ 0.00
High Pressure Control Valve
Products breif:
The product details of the valve indicate that it features a multi-stage throttling system.
The cage throttling assembly, combined with the needle shutter, allows it to withstand significant pressure differentials.
The valve seat has an independent tapered seal, ensuring reliable sealing, in conj...
¥ 0.00
Basket Type Strainer
Products breif:
1. Welding body, and stainless steel screen, Stable working style.
2. PN16/25/40, Class 150/300.
3. Carbon Steel, Stainless Steel, Duplex Stainless Steel.
4. Can be used many industrial Area.
5. Easy to clean and flushing.
¥ 0.00
High Pressure Seal Gate Valve
Products breif:
1. The product design complies with the standards NB/T 47044 and ASME B16.34.
2. The valve stem undergoes quenching and tempering as well as nitriding treatment, providing high-temperature resistance, wear resistance, and excellent corrosion resistance.
3. The valve body middle chamber adopts a pressure self-tightening seal structure (Wood seal), where higher internal pressure results in better sealing performance.
¥ 0.00
PowerStation Mainly Water Supply Valve
Products breif:
1. The valve bonnet features a Pressure sealing structure or flanged design, a cage-type cylindrical plug, and a single-seat conical seal with high leakage class.
2. The sealing surfaces are hard-faced with alloy, and internal components...
¥ 0.00
Gate Valve
Products breif:
1. The product design complies with the standards NB/T 47044, API600 and ASME B16.34.
2. PN10/16/25/40/64/100/160/250, Class 150, 300, 600, 900, 1500, 2500
¥ 0.00
Metal to Metal Seal Ball Valve
Products breif:
1. For low/medium pressures and small diameters, the valve uses a trunnion-mounted ball for stability.
2. For high pressures and large diameters, a support plate reinforces the structure to prevent deformation.
3. Patented fire-resistant design (e.g., secondary metal seals) ensures zero leakage during fire events, complying with API 607/API 6FA standards.
¥ 0.00
Top Entry Ball Valve
Products breif:
1. This valve combines advanced engineering with rigorous safety standards, making it ideal for critical and hazardous services.
2. Patented fire-resistant design (e.g., secondary metal seals) ensures zero leakage during fire events, complying with API 607/API 6FA standards.
¥ 0.00
Floating Ball Valve
Products breif:
1. This valve combines advanced engineering with rigorous safety standards, making it ideal for critical and hazardous services.
2. Patented fire-resistant design (e.g., secondary metal seals) ensures zero leakage during fire events, complying with API 607/API 6FA standards.
¥ 0.00
Welding End Ball Valve
Products breif:
1. Fully welded structure. Can be equipped with nozzles and extended stem for underground installation as per customer requirements.
2. Various seat designs and ball hardening methods to accommodate different temperatures and media.
3. Valves can be manufactured with Double Block and Bleed (DBB) or Double Piston Effect (DPE) seats upon request.
¥ 0.00
Wear-resistant ball valve
Products breif:
1. Suitability for Solid Particle Media: Designed to handle fluids containing solid particles without clogging or erosion damage.
2. Operation in High-Risk Environments: Certified for use in extreme conditions such as high-pressure pure oxygen systems, ensuring safety and reliability.
¥ 0.00
ANSI Check Valve
Products breif:
1. Using solidwork and Finite Element Analysis design tools, optimize working parts moving action.
2. COSMOSXpress software help engineer to optimize valve's structure.
3. Flow simulation simulate medium's flowing action, heat transfer process, and help engineer to decrease cavation, make less flowing resistance.
¥ 0.00
ANSI Gate Valve
Products breif:
1. Using solidwork and Finite Element Analysis design tools, optimize working parts moving action.
2. COSMOSXpress software help engineer to optimize valve's structure.
3. Flow simulation simulate medium's flowing action, heat transfer process, and help engineer to decrease cavation, make less flowing resistance.
¥ 0.00
ANSI Globe Valve
Products breif:
1. Using solidwork and Finite Element Analysis design tools, optimize working parts moving action.
2. COSMOSXpress software help engineer to optimize valve's structure.
3. Flow simulation simulate medium's flowing action, heat transfer process, and help engineer to decrease cavation, make less flowing resistance.
¥ 0.00
Anti-Flushing Globe Valve
Products breif:
1. The product design complies with the NB/T 47044 and ASME B16.34 standards.
2. The stem undergoes quenching and nitriding processes, providing heat resistance, wear resistance, and high corrosion resistance.
3. Erosion-resistant seat, disc, and protective sleeve are utilized to enhance durability.
4. The seat ring features a welded hard alloy layer and is precision-machined
¥ 0.00
Temperature and Pressure Reduction Units
Products breif:
1. Pressure reducing valves to lower pressure to desired levels.
2. Desuperheaters (e.g., water injection types) to cool steam via controlled spray systems.
3. Control systems for automated regulation of temperature/pressure parameters.
¥ 0.00
High Pressure Gate Valve With Pass Valve
Products breif:
1. The product design complies with the standards of NB/T 47044 and ASME B16.34.
2. The main shaft has undergone quenching and nitriding treatment, featuring high heat resistance, wear resistance and excellent corrosion resistance.
3. The hollow part of the valve body has...
¥ 0.00
High Pressure Drain Steam Globe Valve
Products breif:
The disc is the core component of the valve. Beyond high-quality materials, its design plays a decisive role.
Our company employs an erosion-resistant protective sleeve design that prevents direct impact of the medium flow on the sealing surfaces.
This structure significantly extends the service life of the valve and enhances operational reliability.
¥ 0.00
High Pressure Forged Check Valve
Products breif:
1. The product design complies with the standards of NB/T 47044 and ASME B16.34.
2. The main shaft has undergone quenching and nitriding treatment, featuring high heat resistance, wear resistance and excellent corrosion resistance.
3. The hollow part of the valve body has...
¥ 0.00
High Temp&Pressure Inlet Valve
Products breif:
The inlet valve is used in conjunction with a check valve.
After the high-pressure heater is filled with water, as the water pressure increases and reaches a specific level, the pressure differential across the stem cross-section of the inlet valve forces the valve to open automatically.
This allows steam to enter the heater for heating purposes. When the unit is shut down or the water supply is interrupted, the inlet valve closes pr
¥ 0.00
Power Station Drainage Ball Valve - Integral Type
Product Breif:
Anti-Erosion Ball Structure: Ensures a larger flow area at the initial opening stage under the same stroke, rapidly reducing pressure differentials and minimizing high-pressure erosion time, effectively extending service life.
Special Condition Adaptation: In specific work conditions (e.g., main steam pipeline drainage valves that also handle steam discharge during pipeline warm-up), high flow velocity and impact force cause high-frequency oscillation of the ball within the valve
¥ 0.00
High Pressure Drain Water Ball Valve
Products breif:
1. Part-Turn Operation: Significantly reduces wear and friction on the stem seal, preventing external leaks.
2. Erosion-Resistant Ball Design: Provides a larger flow area for a given stroke in the initial opening phase, allowing for a faster reduction in...
¥ 0.00
PowerStation Globe Valve
Product Breif:
1. The product design complies with standards NB/T 47044 and ASME B16.34.
2. The stem undergoes quenching and nitriding treatment, providing heat resistance, wear resistance, and high corrosion resistance.
3. The valve body’s mid-cavity features a self-sealing structure—the higher the internal pressure, the tighter the sealing.
4. The seat and disc sealing surfaces are overlay-welded with cobalt-based hard alloys (e.g., Stellite), ensuring zero leakage under extreme conditions.
¥ 0.00
Cryogenic Service Ball Valve
Products breif:
1. In accordance with standard requirements, ball valves designed for operating temperatures below -50°C typically feature an extended neck structure to elevate the temperature at the stem seal area and ensure reliable stem sealing.
2.The neck length generally meets standard specifications but can be customized based on special customer requirements as per contract.
¥ 0.00
Steam Extraction Check Valve
Products breif:
The extraction steam check valve is a specialized rapid-action valve designed to protect turbo-generator units.
It prevents the reverse flow of steam from extraction pipelines and heat exchangers back into the turbine during sudden load shedding, when the turbine pressure drops sharply.
This ensures operational safety and system stability.
¥ 0.00
PFA lined Diaphragm Valve
Products breif:
1. Diaphragm Service Life: Single diaphragm lifespan ≥ 10,000 cycles; total product service life exceeds 100,000 cycles.
2. Rapid Operation & Maintenance: Quick open/close functionality with in-line maintenance capability, allowing seal replacement without system shutdown. The fixed-seal design ensures zero external leakage.
¥ 0.00
PTFE lined Butterfly Valve
Products breif:
1. Bidirectional Sealing
2. Double Seal Structure with External Leakage Protection
3. Service Life ≥ 100000 Cycles
4. Corrosion Resistance
5. Full-Bore Design
¥ 0.00
Minimum Flow Control Globe Valve
Products breif:
1. This valve provides continuous control over a wide range of pressure variations.
2. A multistage throttle system with a gradual reduction of the medium pressure is used, the pressure difference at each step is within the vapour pressure...
¥ 0.00
Triple Offset Butterfly Valve
Products breif:
1. The three-eccentric design provides instant contact or disconnection of the disc from the saddle, which guarantees zero wear and zero leakage.
2. The sealing ring is fully integrated into the drive, which allows to carry out replacement without dismantling the whole valve, the...
¥ 0.00
넳 넲
ꁣPrev： High Pressure Forged Check Valve
ꄲNext： PFA lined Diaphragm Valve

Related popular products

Steam Extraction Check Valve

HQ-CNV-Home  ꄲ  Power Plant Valve  ꄲ  Steam Extraction Check Valve

PRODUCTS