VFLO V-Ball Control Valve

Sturdy VFLO Characterised V-notch ball valve is available in sizes 2 through 14 inch ANSI Classes 150, 300 and 600 and in all castable materials. It is designed to overcome the problems of particle entrained processes. VFLO solves many long standing problems faced by traditional ball valves, such as:

  • Inadequate shutoff capabilities.
  • Piping forces that unevenly load the seat.
  • Low rangeability due to limited orifice characterisations.

VFLO reduces torque loads that adversely affect sealing and exceeds 300 to 1 rangeability with strong shearing capacity. VFLO achieves Class IV shutoff with a metal seal and Class VI shutoff with a soft seal. Many important features and options which VFLO uses to fulfill these and other requirements for ruggedness and high performance are listed below.

VFLO V-Ball Control Valve
VFLO V-Ball Control Valve

VFLO Control Valve Advantages and Features

  • One-piece body

    • High performance ensures regardless of flange torque loads.
    • Seat tightness not altered by piping forces, as in two-piece bodies.
    • One leak path eliminated.
  • V-notch ball

    • Clogging reduced.
    • “V” shaped orifice exceeds 300 to 1 rangeability.
    • Shearing action in fibrous fluid mediums is excellent.
  • Pressure assisted / bidirectional seal

    • Metal seal provides greater than ANSI Class IV shutoff.
    • Soft seal achieves ANSI Class VI shutoff.

    No-shim seal

    Servicing and installation problems reduced.

  • Self-centering seal:

    • Seal installation improved and simplified.
    • Shutoff further improved.

    Thick-walled retainer

    Valve’s normal service life extended in erosive environments

  • Flangeless design standard

    Reduced cost


    Integral flange option

    Bolt length reduced, avoiding bolt stretch and leakage in the event of a fire

  • Separable flange option

    • Bolt length reduced, avoiding bolt stretch and leakage in the event of a fire
    • Flange bolting aligns easier

    One-piece, large thread, hex head idler post

    Removal from corrosive service is easier

  • Interchangeability

    Standard face-to-face dimensions allow for easy field upgrading from other product lines.

    Seat replaceable without removing ball and shaft

    Removal from corrosive service is easier

  • Shaft serviceable from outboard end of valve

    Bolt length reduced, avoiding bolt stretch and leakage in the event of a fire

    Full, uninterrupted gasket surface

    Removal from corrosive service is easier

VFLO also capitalises on established features of VFLO quality

  • Cylinder Actuator

    • High-thrust, compact, light weight.
    • Actuator fully interchangeable with DISKFLO rotary valve actuator
    • Actuator air pressure allowable up to 150 psi

    Splined Shaft

    Extra strength provided with no lost motion or deadband.

  • Availability in variety of materials

    Materials include carbon steel, 316 stainless steel and all castable alloys.

Technical Specifications

The VLFO V-Ball Control Valve technical specifications are provided in the table below.

Body Type One - Piece V-notch Ball, Straight - Through, Wafer
Size Range 1/2" to 18.0"
Pressure Class Up to ANSI CL900
Body Materials All castable Alloys materials
End Connections Flangeless – Flanged (Integaral & Separable Flange)
Bonnet Standard, Extended, Cryogenic & Bellow Sealed
Guiding Heavy duty double top stem
Gland Packing PTFE, Braided PTFE, Grafoil, Vaccum
Gaskets PTFE, Spiral Grafoil, Glass filled SS
Seat Ring Clamped - in self aligned Bi - directional Fleet - loc Seal
Ball Segemented V - notch Ball Reduces Clogging, Shearing action in fibrous fluids
Shaft Splined - No lost motion or dead band Stainless Steel / 17 - 4PH
Charactristics Equal Percentage, Linear and On – Off)
Rangeability 300 : 1
Actuator Spring Cylinder Rotary, Fully field reversible
Air pressure 2.0 to 10.0 Bar
Shut off class With Metal seat - ANSI IV and replaceable Soft seat - ANSI VI
VFLO Cross-Sectional Drawing
Technical Diagram
Our Sizing Software
Get access to our Valve Sizing Program
Become a Distributor
Become one of the Regional Distributors for Mascot Industrial today
Read More