There are no 'off-the-shelf' SlurryFlo control valves; each one is manufactured with a unique seat plate geometry. Based on application requirements, the port area is waterjet cut and CNC machined to our engineers’ exact specifications.
SlurryFlo’s design philosophy is to achieve an 'equilinear' valve characteristic for maximum wear resistance; however any custom flow characteristic can be achieved. There are literally infinite trim geometry possibilities. And, if flow conditions change over time, SlurryFlo can retrofit the existing valve with a new seat plate (i.e. an alternate Cv or flow characteristic can be obtained 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).
Canadian patent number: CA 2 489 079
United States patent number: US 7,431,264 B2