Vertical Suspended Double Casing Inline Pump (API 610 VS4)

Model: CVP

The CENTFOS-CVP API 610 VS4 pump is a vertical suspended, double-casing centrifugal pump designed for refinery, petrochemical, offshore, and industrial services. Its double casing improves pressure containment and safety, while the vertical shaft ensures stable operation. Built with advanced hydraulics and rugged construction, it delivers reliable performance in severe-duty industrial applications.

API 610 VS4 Pump

Introduction

The CENTFOS-CVP, API 610 VS4 pump is a vertical suspended, double-casing centrifugal pump designed in accordance with the latest edition of API 610 for severe-duty refinery, petrochemical, offshore, and industrial process applications.

The VS4 configuration combines a vertical suspended shaft design with a double casing pressure containment system, providing superior mechanical strength, improved safety, and enhanced pressure resistance. This design is particularly suited for applications requiring high reliability, safe handling of hazardous fluids, and stable operation under extreme process conditions.

CENTFOS VS4 pumps integrate advanced hydraulic engineering, heavy-duty construction, and API-compliant design philosophy to ensure dependable performance in critical industrial services.

Key Features
  • Designed according to API 610 (VS4 type)
  • Vertical suspended configuration
  • Double casing construction
  • Inline discharge arrangement
  • High pressure containment capability
  • Heavy-duty shaft design
  • Low shaft deflection
  • Replaceable wear rings
  • Cartridge seal compatible
  • API 682 seal chamber compatibility
  • Line shaft supported rotor
  • Continuous duty rated
  • VFD compatible
  • Customizable column length
  • Designed for severe operating environments
Technical Specifications
Parameter Range
Flow Rate Up to 3,000 m³/hr
Head Up to 300 m
Pressure Up to 120 bar
Temperature −46°C to +450°C
Speed Up to 3,600 rpm
Setting Depth Up to 15 m or more
Stages Single or multistage
Seal Type Mechanical seal
Mounting Vertical mounting plate
Design Characteristics
Hydraulic Design
  • Optimized impeller geometry for efficiency
  • Balanced hydraulic forces
  • Smooth flow passages
  • Stable performance across operating range
  • Low NPSHr characteristics
  • Suitable for variable process conditions
Mechanical Design
  • Double casing pressure containment design
  • Rotor supported by line shaft bearings
  • Heavy-duty shaft construction
  • High stiffness rotor assembly
  • Designed for high pressure service
  • Precision-machined rotating components
  • Long bearing life
Seal Chamber Design
  • API 682 compliant seal chamber
  • Cartridge seal compatible
  • Large bore seal housing
  • Designed for hazardous fluids
  • Supports multiple flush plans
  • High pressure sealing capability
Installation Advantages
  • Vertical installation saves floor space
  • Inline piping reduces layout complexity
  • Motor remains above fluid level
  • Eliminates suction piping
  • Reduced NPSH requirement
  • Easy removal for inspection and servicing
Construction & Materials
Component Standard Material
Outer Casing Carbon steel
Inner Casing Alloy steel
Impeller SS316 / CF8M
Shaft AISI 4140 / 410 SS
Wear Rings Stainless steel
Bearing Bushings Bronze / composite
Discharge Head ASTM A216 WCB
Fasteners Alloy steel
Optional materials
  • Duplex stainless steel
  • Super duplex
  • Alloy 20
  • Monel
  • Hastelloy
  • Sour service alloys
Applications
CENTFOS VS4 pumps are widely used for:
  • Refinery process systems
  • Hydrocarbon storage terminals
  • Chemical processing plants
  • Offshore platforms
  • LNG / LPG facilities
  • Power generation plants
  • Tank farm circulation
  • Injection systems
  • Utility services
  • Hazardous liquid transfer
Advantages
  • Enhanced pressure containment
  • High operational safety
  • Reliable vertical design
  • Long service life
  • Suitable for severe duty service
  • API-compliant heavy-duty construction
  • Low vibration performance
  • Ideal for critical applications