There are no 'off-the-shelf' SlurryFlo control valves; each one is manufactured with a unique seat plate design. Based on application requirements and SlurryFlo’s proprietary sizing calculations, the seat plate is waterjet cut and CNC machined to our engineers’ exact specifications.
SlurryFlo’s design philosophy is to achieve an 'equilinear' valve characteristic; however any custom flow characteristic can be achieved. There are literally infinite trim geometry possibilities. If flow conditions change over time, SlurryFlo can retrofit the existing valve with a new/revised seat plate. An alternate Cv and/or flow characteristic can be achieved without changing any other parts.
The custom seat plate works in concert with the valve's gate resulting in a centered orifice with variable control.
If increased flow is temporarily required, the gate can be retracted beyond its normal throttling positions. The concave gate profile always matches valve's bore.
These valves are designed for modulating, however the gate may be closed if required. The metal-to-metal seating surface provides a Class IV shutoff, blocking 99.99% of the valve's rated Cv.
Each trim replacement essentially provides a new valve at a fraction of the cost.
Similarly, if flow conditions ever change, a new seat plate can be specified to provide an increase or decrease in flow. There is no need to replace the entire valve assembly (often the case with other valve designs).
In rare cases where the slurry is very dense (<5% of SlurryFlo applications), we may recommend a traditional packing design, which seals around the gate's perimeter. This eliminates the rare chance of slurry dewatering above the gate.
Canadian patent number: CA 2 489 079
United States patent number: US 7,431,264 B2