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 Control Valve Advantages and Features
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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.
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V-notch ball
- Clogging reduced.
- “V” shaped orifice exceeds 300 to 1 rangeability.
- Shearing action in fibrous fluid mediums is excellent.
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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.
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Self-centering seal:
- Seal installation improved and simplified.
- Shutoff further improved.
Thick-walled retainer
Valve’s normal service life extended in erosive environments
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Flangeless design standard
Reduced cost
Integral flange option
Bolt length reduced, avoiding bolt stretch and leakage in the event of a fire
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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
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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
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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
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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.
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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 |
Download VFLO Brochure 
- 91 Metrolink Circuit Campbellfield, VIC 3061 Australia