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Flow-Tek Series 19 is a versatile Segmented Ball Valve designed for throttling or on-off applications in various industries including pulp & paper, chemical, power, oil & gas, and mining.
The valve features a characterized ball segment for high rangeability with splined stem connection for precise control, maintenance friendly segment-stem assembly, low friction shaft and thrust bearings for longer life, integral actuator mounting pads, and interchangeable seats.
Valve Body• One piece body design which offers greater rigidity against fluctuating pipe loads.• Eliminates the leak path associated with two piece body designs.• Available in Flangeless and Flanged Ends.
Ball Segment• Carefully designed with characterized V-port to offer rangeability in excess of 300:1, ideal for throttling applications in high consistency pulp services or slurry applications.• Perfectly ground spherical surface with rounded edges ensure lower operating torques for metal seated valves.• Hard coated spherical surface prevents galling.• The segment is carefully designed for optimum flow.• The seat is supported during higher openings to prevent rocking motion and possible failure of the valve.
Ball – Stem Connection Seat• Close-fit splined connection between stem and the segment offers extra strength with no lost motion or dead band.• Perfectly oriented, specially designed shaft pin facilitates self-alignment of the ball segment while simplifying the assembly and disassembly during routine maintenance.
Seat• Available with a metal seat and soft seat.• Directs the flow away from the sealing area.• Pressure energized seat design offers excellent sealing even at very low differential pressures.• Self-aligning seat is independent of external pipe loads and offers excellent sealing even in adverse conditions.• Standard metal seat has hard-faced seat surface with Stellite overlay on 316 SS base material.• Standard soft seat design uses Tek-Fil® to maintain exceptional chemical and heat resistance.• Flow-Teks’ Tek-Fil® provides higher compressive strength, lower co-efficient of friction, superior abrasion and wear resistance, lower permeability, lower porosity, and reduced cold flow.
Bearings• Stem and end post bearings are low friction and maintenance free.• Made of wear resistant PTFE compound supported by metal fabric or thick walled metal depending on the pressure drop.• Additional thrust bearing on stem collar for high pressure applications eliminates unbalanced axial load for consistent high performance and precision control.