ARC Automatic Recirculation Valve

GALLERY

Construction of ARC Automatic Recirculation Valve

• Typical ARV construction consists of:

• Valve Body: Cast or forged steel, stainless steel, duplex, etc. (based on fluid service).

• Main Flow Path: Contains a disc or piston that acts like a non-return valve.

• Bypass Line: Includes an integrated throttling device (orifices or nozzles) to control bypass flow.

• Spring & Guide Mechanism: Controls the automatic opening/closing of bypass.

• Seat & Trim: Hardened or stellited surfaces for wear and cavitation resistance.

• Features of ARC Automatic Recirculation Valve

• Ensures minimum pump protection flow at all times.

• Self-acting: No need for external power or actuator.

• Compact design combining check valve + control valve + bypass throttle in one unit.

• Can handle high pressure differential and cavitating services.

• Available for boiler feedwater, condensate, hydrocarbons, and chemical service.

  Typically designed for flows up to 1500 m³/h and pressures up to 400 bar.

  Manufacture Standards of ARC Automatic Recirculation Valve

• API 6D / API 600 / API 602 → General valve design standards.

• ASME B16.34 → Pressure–temperature ratings.

• MSS-SP-61 → Pressure testing.

• API 598 → Valve inspection & testing.

• NACE MR0175 / ISO 15156 → For sour service (H₂S).

• EN / DIN standards also used for European markets.

Advantages of ARC Automatic Recirculation Valve

• Protects pump from damage due to low/no flow.

• Reduces need for complex external flow control loops.

• Compact and reliable (fewer instruments and moving parts).

• Energy saving compared to continuous recirculation or manual bypass.

• Long service life with hardened trim.

• Fast automatic response.

Applications of ARC Automatic Recirculation Valve

• Centrifugal pumps in critical services:

• Boiler feedwater pumps (power plants).

• Condensate pumps.

• Hydrocarbon process pumps (refineries, petrochemicals).

• Seawater injection pumps (offshore platforms).

• Chemical and fertilizer plants.

• Desalination and water treatment.

Operation Manual of ARC Automatic Recirculation Valve

• Normal Operation: Valve automatically regulates bypass without operator intervention.

• Startup: Ensure ARV is installed correctly with bypass routed to a safe return line (tank or suction).

• Shut-down: Pump discharge line closes; valve closes automatically.

• Flow Setting: Minimum flow setting is calibrated by manufacturer; usually not field-adjustable.

 Maintenance Manual of ARC Automatic Recirculation Valve

• Routine Inspection:

• Check for seat leakage, bypass wear, unusual noise (cavitation).

• Inspect bypass line for erosion or vibration damage.

• Periodic Maintenance:

• Lapping or replacing disc/seat if leakage exceeds limit.

• Replace springs if fatigue is observed.

• Clean throttling orifices from scaling or debris.

• Major Overhaul:

• Disassemble body, inspect trim, replace seals and gaskets.

• Pressure test per API 598 after reassembly.

• Maintenance interval depends on service conditions (e.g., high-pressure boiler feedwater may need annual inspection).