Vertical Suspended Double Casing Multistage Pump (API 610 VS6)

Model: CVS

The CENTFOS-CVS API 610 VS6 pump is a vertical suspended, double-casing multistage centrifugal pump designed for ultra-high pressure and high-temperature services. Its barrel construction and multistage hydraulics ensure excellent rotor stability, strong pressure containment, and reliable operation in demanding applications such as refineries, petrochemical plants, offshore platforms, and power generation facilities.

API 610 VS6 Pump

Introduction

The CENTFOS-CVS, API 610 VS6 pump is a vertical suspended, double-casing multistage centrifugal pump designed in accordance with the latest edition of API 610 for ultra-high pressure, high-temperature, and critical process services.

The VS6 configuration combines a vertical suspended shaft design with a double casing barrel construction and multistage hydraulic system. This design provides superior pressure containment, excellent rotor stability, and high mechanical strength for severe-duty applications requiring very high head and continuous operation.

CENTFOS-CVS, VS6 pumps are engineered to deliver reliable performance, structural integrity, and long service life in demanding industrial environments such as refineries, petrochemical plants, offshore platforms, and power generation facilities.

Key Features
  • Designed according to API 610 (VS6 type)
  • Vertical suspended configuration
  • Double casing barrel construction
  • Multistage hydraulic design
  • Ultra-high pressure capability
  • Heavy-duty shaft construction
  • Extremely low shaft deflection
  • Replaceable wear rings
  • Cartridge seal compatible
  • API 682 seal chamber compatibility
  • Line shaft supported rotor
  • Continuous duty rated
  • VFD compatible
  • Customizable setting depth
  • Designed for severe service environments
Technical Specifications
Parameter Range
Flow Rate Up to 2,500 m³/hr
Head Up to 1,800 m
Pressure Up to 350 bar
Temperature −46°C to +450°C
Speed Up to 3,600 rpm
Setting Depth Up to 20 m or more
Stages Up to 16
Seal Type Mechanical Seal
Mounting Vertical Mounting Plate
Design Characteristics
Hydraulic Design
  • Multistage impeller configuration for ultra-high head
  • Optimized vane geometry for efficiency
  • Balanced hydraulic forces
  • Smooth internal flow passages
  • Stable performance across operating range
  • Low NPSHr first-stage design
Mechanical Design
  • Double casing pressure containment system
  • Vertical suspended rotor configuration
  • Heavy-duty shaft construction
  • High stiffness rotor assembly
  • Precision-machined rotating components
  • Designed for extreme pressure conditions
  • Long bearing life (>25,000 hrs L10)
Seal Chamber Design
  • API 682 compliant seal chamber
  • Cartridge seal compatible
  • Large bore seal housing
  • Suitable for hazardous fluids
  • Supports multiple seal flush plans
  • Designed for high pressure sealing systems
Installation Advantages
  • Vertical installation saves floor space
  • Motor remains above fluid level
  • Eliminates suction piping
  • Reduced NPSH requirement
  • Compact installation footprint
  • Easy removal for maintenance
Construction & Materials
Component Standard Material
Outer Casing Forged Alloy Steel
Inner Casing Carbon Steel / Alloy Steel
Impellers SS316 / CF8M
Shaft AISI 4140 / 410 SS
Wear Rings Stainless Steel
Bushings Bronze / Composite
Discharge Head ASTM A216 WCB
Fasteners High Tensile Alloy Steel
Optional Materials
  • Duplex stainless steel
  • Super duplex
  • Alloy 20
  • Monel
  • Hastelloy
  • Sour service alloys
Applications
CENTFOS-CVS, VS6 pumps are widely used for:
  • High-pressure refinery services
  • Boiler feed systems
  • Hydrocarbon injection
  • Offshore platforms
  • Petrochemical plants
  • LNG / LPG facilities
  • Power generation plants
  • Water injection systems
  • Desalination plants
  • Critical process systems
Advantages
  • Ultra-high head capability
  • Exceptional pressure containment
  • Long service life
  • Reliable continuous-duty operation
  • Low vibration performance
  • API-compliant heavy-duty construction
  • Ideal for severe-duty applications