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- 9 Stage Turbotrol trim
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- 5 Stage Multi-Spline trim
SEVERE SERVICE
VALVES
TURBOTROL AND
MULTI-SPLINE TRIMS
Series 51 & 57 Turbotrol
Severe Service Valves
The patented Turbotrol valve design is used on very high pressure-drop liquid applications to eliminate the potentially erosive effects of cavitation. This design was first introduced by KKI in the mid 1980s and was specifically developed for minimum flow re-circulation pump protection.
The design is typically employed on applications where the pressure drop requirement is in excess of 200 bar and the downstream pressure close to Pv. The design incorporates between four and nine stages (nine and 18 turns). The flow is directed through a series of radial and axial flow paths, where the fluid is firstly split into many small flows and then recombines into an axial flow. This occurs repeatedly as it passes through the trim, ensuring controlled dissipation of the fluid energy. The control of the velocity through the trim reduces the high wear rates normally associated with high pressure-drop applications.
An additional feature of the Turbotrol is the plug seating face, which is protected from the effects of wire-drawing and erosion at low flows. A dead band is introduced adjacent to the seat, which ensures that the seating faces are positioned outside the high velocity turbulent flow streams prior to the flow stream holes being exposed.
Turbotrol Design Specification:
- Sizes: 1.5” to 8” (40mm to 200mm).
- Ratings: ASME 600 to 4,500 / API 3,000 to 15,000.
- Design: ISO 10423 / API 6A / API 17D / AMSE B16.34 / ASME VIII.
- Standards: PED / ATEX / NACE MR0175 / NORSOK.
- End connections: ISO 10423 / API 6A / API 17D / ANSI Flanges / Hub type connections.
- Stages of let-down: Four to nine (nine to 18 turns).
Multi-Spline Trims
The multi-spline trim is designed to extend the Turbotrol range for high pressure-drop liquid services on applications with low flow rate requirements. These trims are supplied in valve sizes up to 2” (50mm) diameter. In common with the larger Turbotrol trims, the flow sleeve and plug are constructed as an insertable cartridge, with up to five stages of pressure drop to ensure that cavitation does not occur throughout the stated flow range.
The multi-spline trim option can achieve rangeabilities in excess of 100 to 1, due to the very precise fit of the plug within the seat. The standard trim material is full stellite Grade 6. However, there are also tungsten carbide and advanced ceramic options for pressure drops greater than 100 bar (1450 psi).
Typical applications are low-flow, high pressure-drop services, MEG injection, methanol injection and other low-flow requirements.
