Поворотный обратный клапан
Номинальный диаметр:1/2”-20''(DN15-DN500)
Номинальное давлениеКласс 150-2500 (1,0 МПа-320 МПа)
Максимальная рабочая температура：425℃
Материал оболочки：CF8, CF3, CF3M,Ф304，Ф316，F316L，N06625WCB, WCC, A105CW6MC, CY40, M35-1,Инконель 718，N10276，CF8M，Монель К500
Стандарты проектирования:API 6D, ASME B16.34, EN 12334, DIN 3840, JIS B2074.
Связь:Фланец
режим движенияАвтоматический
Поворотный обратный клапан
Определение характеристик продукции и обеспечение ее безопасности:
The Rotary Check Valve is a core component in industrial piping systems, designed for high-flow, low-resistance conditions. It overcomes the pain points of traditional check valves in low-pressure-drop systems, such as slow response, significant water hammer, and valve disc oscillation. This swing check valve, through its hinge shaft rotation structure and optimized fluid dynamics, provides a rapid-opening, tightly sealed anti-backflow solution for large-diameter horizontal pipelines.
Технология вертикального контроля JH Gene
- Low resistance and high efficiency flow → Flow resistance coefficient Kv value ≥ 1.5 times that of traditional structure (ISA 75.01.01)
- Quick and gentle shutdown → Shutdown time ≤ 1.0s (API 6D)
- Герметично закрыто → Уровень утечки IV (API 598)
- Ultra-long durability → Mechanical life ≥ 1,000,000 cycles (API 6D)
- Технический анализ продукта
- Super Wear-Resistant Hardening
- Special Corrosion Resistant
- High-Performance Cast Steel
The superior performance of the JH rotary check valve stems from its precise balance of rotational torque and optimized flow path. The valve disc employs an asymmetric counterweight design based on hydrodynamic calculations, enabling full opening at media flow velocities ≥0.8 m/s, and smoothly rotating back to close as the flow velocity decreases, relying on its own weight and an auxiliary spring (if equipped). The core sealing technology lies in the conical-plane or spherical-conical sealing pair design. Through precision-machined sealing surfaces, a tight fit is achieved under the valve disc’s own weight and media backflow pressure, realizing an API 598 Class IV seal. For large-diameter applications, the dual-disc structure ensures synchronized movement of the two valve discs via a central torsion shaft and synchronizing rod. Combined with a streamlined short valve body (compliant with API 594 short-size dimensions), it achieves extreme compactness while maintaining functionality. For harsh operating conditions, optional Stellite hard alloy sealing surface overlay or flexible graphite-reinforced metal sealing rings ensure long-lasting sealing life under high-temperature, abrasive, or slightly particulate media.
The key components are subjected to ultra-hard surface strengthening, which is specially designed for extreme wear conditions such as coal slurry and mineral slurry, as well as slurry containing particles, thus doubling the service life.
Основной дизайн:
▌ HVOF Tungsten Carbide Spraying → Supersonic flame spraying of tungsten carbide onto valve disc surface | Coating hardness ≥1200 HV, erosion resistant
▌ Engineering ceramic lining for flow channels → Alumina ceramic (Al₂O₃≥95%) lining key flow channels | Hardness ≥85 HRA, erosion resistant
▌ Ion Nitriding Core Components → Hinge shafts and other components are ion nitrided | Surface hardness ≥1000 HV, wear-resistant and deformation-free
It adopts a fully corrosion-resistant alloy flow channel and mirror finish to completely eliminate corrosion problems caused by chloride ions and acid media, making it suitable for highly corrosive and marine environments.
Основной дизайн:
▌ Ultra-low carbon duplex stainless steel → Made of CD3MN/CE3MN material (ASTM A890) | PREN value ≥40, excellent pitting corrosion resistance
▌ Precision Casting and Electropolishing → Investment Casting (ISO 8062 CT7) | Internal Cavity Electropolishing (Ra≤3.2μm) to form a chromium-rich passivation film
▌ Self-lubricating composite material bushing → PTFE fiber reinforced bushing | Friction coefficient ≤0.05, preventing corrosion and seizing.
High-end cast steel and deep heat treatment ensure structural integrity, making it suitable for harsh high-temperature and high-pressure conditions, such as high-temperature and high-pressure pipelines in power plants and chemical plants.
Основной дизайн:
▌Pure Molten Steel and Enhanced Toughness → Electric Arc Furnace + LF Refining Process | Low-Temperature Impact Energy ≥54J (-29℃), Significantly Improved Valve Body Toughness
▌ Forged Hinge Shaft with PTA Overlay → The hinge shaft is made of duplex stainless steel through a single die forging (ASTM A182 F6a) | The sealing surface is overlaid with Stellite 6 PTA, with uniform hardness of ±2 HRC
▌ Intelligent Vibration Aging → Spectral Harmonic Vibration Aging Treatment | Eliminates Residual Stress ≥95%, Dimensionally Ultra Stable
Основные характеристики конструкции и преимущества
- Сверхнизкое сопротивление потоку и энергосбережение: Rotary Check Valve adopts a streamlined flow channel and suspended valve disc → flow resistance coefficient ≤0.2 (ISA 75.01.01) | Energy consumption is reduced by more than 50%, eliminating the problem of excessive system pressure loss.
- Compact Space Adaptability: The dual-disc swing check valve adopts a split design → installation length is reduced by 35% (API 594) | Overcoming space limitations and significantly reducing pipeline layout and civil engineering costs.
- Ultra-long cycle life: Industrial-grade swing check valves are equipped with wear-resistant hinges and hardened seals → Mechanical life ≥ 1 million cycles (API 6D) | Maintenance cycle extended by 10 times, achieving near-maintenance-free operation.
- Gentle low water hammer shutdown: JH buffer-type swing check valve with integrated adjustable damping mechanism → Water hammer peak ≤ 1.2 times working pressure (AWWA C508) | Eliminates destructive water hammer and protects pump and pipeline system safety.
- Intelligent media adaptation: Precise calculation of valve disc counterweight and auxiliary spring → opening pressure as low as 0.01MPa | Adaptable to a wide flow range, eliminating oscillations at low flow rates.
- Sealing under harsh conditions: Optional hard alloy or composite elastic sealing surface → Temperature range -196℃~550℃ | Overcoming the problem of sealing failure under high temperature, wear and corrosion conditions.
Другие товары
ЧАСТО ЗАДАВАЕМЫЕ ВОПРОСЫ-Поворотный обратный клапан
A Rotary Check Valve, also known as a Swing Check Valve, features a disc (typically a circular plate) that swings on a hinge or trunnion like a door. Under forward flow, fluid pressure pushes the disc open, swinging it on its pivot. When flow stops or reverses, the disc swings back to close under reverse pressure and its own weight. Its simple structure consists of a body, cover, swinging disc, and lever mechanism, offering a relatively unobstructed flow path with low resistance.
Преимущества:
Lower Flow Resistance: When fully open, the disc is completely out of the flow path.
Suitable for Larger Sizes: The design is more adaptable for large-diameter valves.
Fewer Installation Restrictions: Can often be installed in both horizontal and vertical pipelines (ensuring the disc pivot is horizontal), whereas lifting types are generally limited to horizontal installation.
Недостатки:
Closing Dynamics & Water Hammer: The long swing travel can cause disc slam upon closing, potentially leading to water hammer and noise in systems with pressure surges.
Герметизация: May provide slightly less effective sealing under very low pressure compared to the flat-seat design of a lifting check valve.
Our Rotary Check Valves are designed and manufactured in strict compliance with international standards and hold major certifications including API, ISO, CE, ABS, BV и CCS. These certifications provide reliable assurance that the products meet global industrial application requirements in materials, design, manufacturing, and performance.
В процессе установки крайне важно:
Orientation & Position: When installed in a horizontal pipeline, ensure the disc pivot pin is horizontal. For vertical installation (upward flow), a model specifically designed for vertical orientation must be selected.
Подтвердите направление потока: Strictly adhere to the flow direction arrow marked on the valve body.
Зарезервируйте место: Account for the disc swing arc and leave sufficient clearance beside the valve for maintenance and disassembly.
Окажите поддержку: For large-diameter valves, proper pipeline support is necessary to prevent line strain from affecting valve sealing.
The following measures can be taken:
Select Models with Damping or Non-Slam Mechanisms: These valves incorporate features like oil dashpots or weighted levers to slow the final closing phase, cushioning impact and significantly reducing water hammer.
Choose a Multi-Disc Design: For large lines, a dual or multi-disc swing check valve can be used, where smaller discs close with less force.
Correct Sizing and Installation: Ensure the valve size matches the service conditions, avoid using standard types in systems with severe pressure surges, and verify correct installation orientation.
Типичные сбои и меры по их устранению:
Disc Fails to Close Fully or Leakage: Could be caused by foreign object obstruction, worn seal faces, or worn hinge pins. Install an upstream strainer and perform regular inspection/cleaning. Severe cases may require seal face repair or part replacement.
Disc Fluttering or Excessive Noise: Often due to unstable system pressure/flow or spring (if equipped) failure. Stabilize system conditions or inspect/replace internal springs/damping components.
Гидравлический удар: Highly likely at pump discharges in high-pressure systems if a non-slam type is not used. Prioritize selecting a Rotary Check Valve with a non-slam feature for such applications.
Rotary Check Valves are particularly suitable for:
Medium to large-diameter water supply, drainage, and wastewater systems.
Petroleum and chemical industry pipelines where low flow resistance is desired.
Pump discharges, though water hammer risk must be carefully assessed based on system pressure, favoring non-slam types.
Media with slight particulates (less prone to sticking than lifting types), though seal faces may wear faster.
Для точного подбора размера, пожалуйста, предоставьте следующую информацию:
Основные параметры: Size (DN/NPS), Pressure Rating (PN/Class).
Тип подключения: Flanged (standard & face type), Butt Weld (BW), etc.
Материалы кузова и отделки: Select based on media, e.g., WCB, 316 Stainless Steel, seal face material (e.g., 13% Cr, STL).
Service Information: Media, temperature, pressure, flow rate.
Особые требования: Whether a non-slam mechanism is needed, Вафля или Фланцевый type, suitability for vertical installation, etc.