Valve Technology

Analytical model predictions of the hydrodynamic torque of various butterfly valve discs (including the effect of upstream flow disturbances) were validated by scale model and full-scale valve testing.
Analytical model predictions of the hydrodynamic torque of various butterfly valve discs (including the effect of upstream flow disturbances) were validated by scale model and full-scale valve testing.

Coupled fluid flow, thermal, and structural analysis supported the development of mathematical models to predict unwedging thrust for gate valves under thermal binding and pressure locking conditions.
Coupled fluid flow, thermal, and structural analysis supported the development of mathematical models to predict unwedging thrust for gate valves under thermal binding and pressure locking conditions.

Our continuous involvement with valve technology has resulted in the development of reliable analytical models, design improvements, and innovative solutions to persistent valve/actuator problems that have defied the industry for decades. Our expertise spans from the conceptual stage through detail design, analysis, prototype development, testing, manufacturing; troubleshooting; and root cause analysis of valve and actuator problems.

Valve Engineering Capabilities

  • JOG MOV PV Implementation Assistance
  • Valve research and development
  • Valve failure analysis
  • New valve designs for demanding applications
  • Valve and actuator mechanical testing
  • Flow loop testing
  • Qualification of valve designs to meet structural and performance specifications
  • Analytical models to predict valve performance under conditions difficult/expensive to test
  • CFD analysis to quantify forces and moments on valve internals
  • Valve/actuator design modifications
  • Valve analysis per ASME and API code requirements
  • Plant-wide application reviews and development of preventive maintenance programs

Valve Engineering Examples

  • Analytical models to predict performance of motor-operated, air-operated, and hydraulically operated gate, butterfly, and globe valves, safety relief valves, and check valves
  • A patented Sentinel gate valve to provide tight shut-off and eliminate degradation in critical nuclear power plant applications
  • A tapered plug valve that eliminates taper locking of the plug under rapid hydraulic transients
  • Bending moment valve testing to determine internal distortions as well as structural and performance capabilities under simulated piping loads
  • Wear and fatigue models for check valves to prevent failure and to prioritize maintenance
  • A low impact, gaseous cryogenic pressure relief valve with modulating pressure control for NASA’s ground support facilities
  • A miniature high temperature, high pressure, low noise throttle valve for underwater propulsion systems in defense applications
The velocity streamlines for a 24-inch double-disc check valve illustrate the flow field predicted using the k-e RNG turbulence model. The CFD model was used to calculate the flow-induced torque based on the check valve disc position and flow rate, as well as the oscillation in pressure force due to flow-induced disturbances of the upstream pump. These CFD results were obtained using Kalsi Engineering's new SGI ALTIX computer, which has 8 64-bit Itanium processor and 32 Gbytes of RAM.
The velocity streamlines for a 24-inch double-disc check valve illustrate the flow field predicted using the k-e RNG turbulence model. The CFD model was used to calculate the flow-induced torque based on the check valve disc position and flow rate, as well as the oscillation in pressure force due to flow-induced disturbances of the upstream pump. These CFD results were obtained using Kalsi Engineering’s new SGI ALTIX computer, which has 8 64-bit Itanium processor and 32 Gbytes of RAM.