Automatic Recirculation Valve（ARC)
Średnica nominalna：1/2”-12''(DN15-DN300)
Ciśnienie nominalne：Klasa 150-Klasa 2500 (1,0 MPa-320 MPa)
Maksymalna temperatura pracy：425℃
Materiał powłoki：WCB, WCC,CF8, CF3, CF3M,F304，F316，F316L，N06625,A105,CW6MC, CY40, M35-1,Inconel 718，N10276，CF8M，Monel K500
Standardy projektowe:API 6D, IEC 60534, ISA 75.01, GB/T 4213, EN 12570, DIN 3357, BS 6364
Połączenie:Kołnierz
Tryb jazdy：Automatic Control
Automatic Recirculation Valve（ARC）
Definicja produktu i misja bezpieczeństwa:
The JH-Automatic Recirculation Valve (ARC Valve) is an independent, self-actuated device engineered to protect centrifugal pumps against cavitation, thermal overheating, and vibration during low-load operation. Replacing complex multi-component control loops, it integrates four core functions into a single body: non-return check protection, dynamic flow sensing, bypass flow control, and multi-stage pressure reduction. By dynamically sensing main-line flow variations, it automatically modulates bypass capacity without external power—guaranteeing the pump consistently operates within its safe Minimum Continuous Stable Flow (MCSF) zone.
Core Working Principles & Fluid Dynamics:
- Full Process Demand (
A1 & B): When the main valve is fully open, fluid thrust lifts the main disc, driving the internal lever to close the secondary bypass valve. Process media flows to the main pipeline with zero bypass loss through a streamlined, straight-through flow field (Figure B). - Modulating Transition (
A2): As process demand decreases, the main disc descends and disengages the lever. System differential pressure smoothly opens the bypass valve, achieving a dynamic self-balance between main-line output and recirculation flow. - Minimum Flow Protection (
A3 & C): When the main line is completely closed, the bypass reaches maximum opening to satisfy the pump’s MCSF. An integrated multi-stage pressure reduction mechanism safely dissipates high-pressure energy, preventing flash evaporation and erosive wear (Figure C).
- Bypass L(≤ 40 bar)
- Bypass M (20–230 bar)
- Manual Start-up & Warm-up Option
Flow-Sensitive Modulating Bypass for Low-to-Medium Pressure Systems
Operational Design: Ten Bypass L configuration consists of the main check valve section integrated with a modulating bypass control unit. As the main check valve moves dynamically with process flow variations, it transmits mechanical motion via an internal lever to control the position of the bypass bushing. This precise movement modulates the exposed orifice area in the control head, ensuring smooth, proportional bypass regulation.
Pressure Rating & Standards: Specifically engineered for differential pressures up to 40 bar. Comes standard with an integrated high-integrity non-return check function to prevent pump reverse spin.
Advanced Multi-Stage Decompression for Severe High-Pressure Service
Operational Design: Ten Bypass M configuration combines the main check valve section with an advanced multi-stage pressure reduction bypass. Mechanical lever movement is transmitted via a high-precision piston directly to a multi-stage vortex plug. By dividing the pressure drop across several sequential reduction stages, this design safely bypasses minimum flow while thoroughly eliminating cavitation, flash evaporation, and erosive wear.
Pressure Rating & Standards: Designed for severe industrial applications with differential pressures ranging from 20 bar up to 230 bar. Comes standard with integrated non-return check protection.
Customizable Auxiliary Connection for Thermal Shock Protection
System Integration: To support complex commissioning and extreme weather operations, the JH-ARC Valve can be engineered with an auxiliary connection located directly below the check valve section.
On-Demand Customization: Available as a custom add-on upon request. This manual start-up or warm-up option allows operators to introduce thermal media to gradually pre-heat the centrifugal pump and process piping prior to full-load operation. This critical feature eliminates thermal shock, prevents pipe distortion, and ensures safe, reliable system start-ups in freezing or high-temperature applications.
Główna konstrukcja i zalety
4-in-1 System Simplification: Replaces traditional multi-valve control loops (control valve + flow meter + check valve + wiring) with a single integrated unit → Piping footprint and installation costs reduced by 60% | Eliminates multiple external leak points and complex system failure risks.
Self-Actuated & Zero External Power: Purely mechanical, fluid-powered operation driven dynamically by process flow variations → Zero electrical wiring, pneumatic air supply, or monitoring sensors required | Ensures 100% operational reliability and pump protection even during total plant power outages.
Deep Anti-Cavitation & Decompression: Advanced multi-stage vortex bypass (Bypass M) divides high pressure drops across sequential throttling stages → Applicable for severe differential pressures up to 230 bar | Cavitation damage, flashing, and vibration reduced by 90%, extending overall pump lifespan by over 300%.
Instant Non-Return Protection: Spring-loaded, streamlined main disc engineered with precision guiding → Millisecond-level reverse flow shut-off (API 598 tightness standard) | Thoroughly protects expensive centrifugal pumps against destructive water hammer and reverse spin damage.
Precise Minimum Flow Regulation: Dynamically modulates recirculation flow based on real-time main-line demand → Guarantees the centrifugal pump consistently operates within its safe Minimum Continuous Stable Flow (MCSF) zone | Optimizes system energy efficiency and prevents dry-run thermal overheating.
High Durability in Severe Service: Premium forged or cast valve body equipped with hard-faced sealing surfaces (e.g., Stellite overlay) → Exceptional resistance to high-velocity fluid erosion and corrosion | Significantly lowers lifecycle maintenance costs and supports long-term continuous operation.
Inne produkty
FAQ-Automatic Recirculation Valve
The JH-Automatic Recirculation Valve functions as a 4-in-1 self-actuated protection system. As the main line flow decreases, the spring-loaded check disc lowers, mechanically acting through an internal lever to open the bypass valve and ensure the pump’s Minimum Continuous Stable Flow (MCSF). Its core advantage is eliminating complex, multi-component loops (control valve + flow meter + check valve + wiring), thereby reducing installation costs by 60% and requiring zero external power to operate.
A continuous bypass wastes significant system energy by constantly recirculating fluid even at peak demand. A traditional multi-valve loop requires electrical power, sensors, and extensive piping, introducing multiple failure points and high maintenance costs. The JH-ARC Valve overcomes both: it only opens the bypass when necessary to save energy, and operates purely on fluid mechanical power, delivering 100% reliability without external wiring or air supply.
The selection depends strictly on your system’s operating differential pressure (▲P). For low-to-medium pressure applications up to 40 bar, ten Bypass L (modulating control head) is recommended for smooth, proportional bypass regulation. For severe high-pressure services ranging from 20 bar up to 230 bar, ten Bypass M (multi-stage vortex plug) is required to safely dissipate high-pressure energy and thoroughly eliminate cavitation and flashing.
Tak. To prevent cavitation during high differential pressure release, our bypass integrates advanced multi-stage pressure reduction that safely dissipates fluid energy and reduces vibration by 90%. Additionally, the main line features a precision-guided, spring-loaded check disc that delivers millisecond-level reverse flow shut-off (compliant with API 598), thoroughly protecting expensive pumps from destructive water hammer and reverse spin.
NIE. The JH-ARC Valve is entirely self-actuated and flow-sensitive. It is powered purely by the dynamic fluid thrust of the main process media acting on the internal disc and lever mechanism. This zero-external-power design guarantees complete operational safety and continuous pump protection, even during total plant power outages or severe electrical failures.
To engineer the exact MCSF protection for your centrifugal pump, we typically require:
Pump data (Minimum Continuous Stable Flow rate, normal/max flow rates).
Operating conditions (Inlet pressure, bypass outlet pressure, differential pressure, and fluid temperature).
Media characteristics (Fluid type, viscosity, and corrosiveness).
Line size and flange connection standards (e.g., ASME, EN, API).
Yes, available upon request. For complex commissioning, freezing environments, or high-temperature applications, we can engineer an auxiliary connection directly below the main check valve section. This option allows operators to introduce thermal media to gradually pre-heat the pump and process piping prior to full-load operation, completely eliminating thermal shock and pipe distortion
The valve should be installed as close to the centrifugal pump discharge as possible, typically in a horizontal position (vertical installation is also supported upon engineering evaluation). Because it integrates a self-lubricating, low-friction guiding mechanism and wear-resistant hard-faced sealing surfaces (e.g., Stellite overlay), it requires minimal routine maintenance, significantly lowering lifecycle operating costs while supporting long-term continuous operation.