The DISKFLO Eccentric / Triple disc rotary control valve achieves bi-directional bubble-tight shutoff while maintaining low breakout torque at both high & low pressure drops. It is available in ANSI Classes 150 thru 1500 and in sizes 2 through 72-inch. This MASCOT rotary valve is available in carbon steel, 316 stainless steel and other alloys.
Eccentric Disc seating assures low breakout torque by utilizing the pressure drop across the valve to aid the seating process. Since much of the seating force is supplied by the pressure drop, the need for strong actuator seating force – and therefore breakout torque – is reduced. Combined with DISKFLO's high-thrust cylinder actuator and eccentric-cammed disc, it is possible to achieve especially high-performance throttling – even in large pressure drops close to the seat.
Eccentric / Triple Cammed Disc
A double offset and triple offset have been designed into the disc to lift it out of the seat immediately upon actuation. This avoids wear on the seat and disc, reducing leakage and parts replacement. It also improves throttling by eliminating friction.
DISKFLO Butterfly Control Valve Advantages and Features
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General
- Bubble-tight shutoff equal to ANSI Class VI
- Low breakout torque assures accurate throttling, even close to the seat
- Non clogging seat design
- Easy removal
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Metal Seat Eccentric-cammed disc
- Shutoff better than ANSI Class IV
- Disc pulls out of seat immediately, preventing seat wear
- Accurate throttling due to disc profile when rotating into the seat
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Single pivot-point, splined shaft
- Lost motion minimized between shaft and actuator
Bolted seat retainer
- Uninterrupted gasket surface allows for a wide variety of gasketing
Non-selective disc & shaft
- Easier maintenance
- Reduced cost –replace part needed, not entire assembly
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Wafer body
- Rugged and lightweight for easy handling and maintenance
- One body serves ANSI Classes 150, 300 and 600 in sizes 2,3,4,6 & 8
- Industry standard MSS SP-67 permits shorter flange bolting than ball or cammed valves, increasing safety and reducing possibility of leakage
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Flow capacity
Capacity greater than globe, plug and cammed control valves
Concave disc
Increased flow capacity
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Disc stop in body
- Prevents damage to seat due to overstroking
- Permits in-line disc relocation during maintenance
Wide variety of packing box configurations
Purged bonnet and lubricator options
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Fully enclosed, air purged transfer case
- Extra safety
- Prevents atmospheric corrosion of actuator internals
- Disc position indicator mounted on transfer case
DISKFLO also capitalizes on established features of MASCOT product lines
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Cylinder Actuator
- High thrust for high-performance throttling
- Compact and lightweight for easier servicing and maintenance
- Fully interchangeable with ShearStream ball valve actuator
- Actuator air pressures allowable up to 150 psi
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Wide interchangeability
- Spare par ts stocking requirements minimized
- Inventory costs reduced
- Many GFLO and VFLO parts are interchangeable with DISKFLO
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Availability in variety of materials
Carbon steel, 316 stainless steel and other alloys.
Seat interchangeability
Metal or Teflon® seats easily installed
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Spool-type four-way positioner
- Convertible between I/P and P/P
- Calibration and maintenance easy due to fewer parts
DISKFLO Technical Specifications
The DISKFLO High Performance Butterfly Control Valve technical specifications are provided in the table below.
| Body Type | Wafer, light in weight, provides large flow and minimum pressure drop |
| Size Range | 2-72 Inch |
| Pressure Class | 1500 / CL2500 / CL4500 / API |
| Body Materials | All castable Alloys |
| End Connections | Wafer, lugged, flanged |
| Gland Packing | PTFE, Braided PTFE, Grafoil |
| Seat Ring | Clamped-in, self aligned |
| Shaft | Splined - No lost motion or dead band |
| Charactristics | Equal Percentage, Linear and On – Off |
| Actuator | Rotary spring cylinder, fully field reversible |
| Shut off class | With metal seat - ANSI IV and replaceable Soft seat - ANSI VI |
Download DISKFLO Brochure 
- 91 Metrolink Circuit Campbellfield, VIC 3061 Australia