Valtek Severe Service Equipment

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Valtek Severe Service EquipmentChannelStream TrimClass 150 - 600Body Trim No. Stages Stroke C Vσ min.BoreSize (Seat Dia.) Area1.5 1.38 2 1.50 17 .170 1.771.25 3 1.50 11 .070 1.481.12 4 1.50 6 .020 .992 1.38 2 1.50 18 .170 1.771.25 3 1.50 12 .070 1.491.12 4 1.50 7 .020 .993 2.50 2 2.50 50 .200 5.412.38 3 2.50 34 .080 4.912.00 4 2.50 20 .025 3.551.62 5 2.50 12 .007 2.411.25 6 2.50 7 .002 1.494 3.50 2 3.00 85 .200 10.33.12 3 3.00 54 .080 8.32.75 4 3.00 33 .025 6.512.38 5 3.00 21 .007 4.911.88 6 3.00 12 .002 3.146 5.25 2 4.00 175 .200 22.74.75 3 4.00 105 .080 18.74.25 4 4.00 65 .025 15.13.50 5 4.00 40 .007 10.33.00 6 4.00 25 .002 7.678 6.50 2 6.00 320 .200 34.56.00 3 6.00 200 .080 29.55.50 4 6.00 130 .025 24.85.00 5 6.00 85 .007 20.64.50 6 6.00 55 .002 16.810 8.75 2 7.50 530 .230 61.98.38 3 7.50 350 .090 56.77.88 4 7.50 230 .028 50.37.38 5 7.50 155 .008 44.26.88 6 7.50 105 .002 38.512 9.75 2 8.00 640 .230 76.69.00 3 8.00 400 .090 65.48.38 4 8.00 260 .028 56.77.88 5 8.00 180 .008 50.37.38 6 8.00 125 .002 44.214 11.00 2 8.00 720 .240 97.210.25 3 8.00 460 .095 84.59.50 4 8.00 300 .030 72.88.75 5 8.00 200 .008 61.98.00 6 8.00 135 .002 51.8Class 900 - 1500Body Trim No. Stages Stroke C Vσ min.BoreSize (Seat Dia.) Area1.5 1.62 2 1.50 20 .170 2.411.38 3 1.50 12 .070 1.771.12 4 1.50 7 .020 1.131.12 5 1.50 4 .006 .992 1.62 2 1.50 20 .170 2.411.38 3 1.50 12 .070 1.771.12 4 1.50 7 .020 1.131.12 5 1.50 4 .007 .993 2.50 2 2.50 50 .180 5.412.38 3 2.50 32 .075 4.912.00 4 2.50 20 .022 3.551.69 5 2.50 12 .007 2.411.69 6 2.50 7 .002 1.4914Table 7: ChannelStream Trim DataClass 900 - 1500 (continued)Body Trim No. Stages Stroke C Vσ Boremin.Size (Seat Dia.) Area4 3.50 2 3.00 85 .200 10.33.12 3 3.00 53 .080 8.32.75 4 3.00 32 .025 6.492.38 5 3.00 20 .007 4.911.88 6 3.00 12 .002 3.146 5.25 2 4.00 170 .200 22.74.75 3 4.00 100 .080 18.74.25 4 4.00 65 .025 15.03.25 5 4.00 40 .007 10.33.00 6 4.00 25 .002 7.678 6.50 2 6.00 310 .200 34.56.00 3 6.00 200 .080 29.55.50 4 6.00 130 .025 24.85.00 5 6.00 85 .007 20.64.50 6 6.00 55 .002 16.810 7.75 2 8.00 490 .230 48.77.25 3 8.00 310 .090 42.76.75 4 8.00 200 .028 37.16.25 5 8.00 140 .008 31.95.75 6 8.00 95 .002 27.112 9.75 2 8.00 630 .230 76.69.00 3 8.00 390 .090 65.48.38 4 8.00 250 .028 56.77.88 5 8.00 170 .008 50.37.38 6 8.00 120 .002 44.214 10.25 2 8.00 670 .240 84.59.50 3 8.00 420 .095 72.88.75 4 8.00 270 .030 61.98.00 5 8.00 180 .008 51.87.38 6 8.00 130 .002 44.2Class 2500Body Trim No. Stages Stroke C Vσ min.BoreSize (Seat Dia.) Area1.5 1.62 2 1.50 20 .170 2.411.38 3 1.50 12 .070 1.771.12 4 1.50 7 .020 1.231.12 5 1.50 4 .006 .992 1.62 2 1.50 20 .170 2.411.38 3 1.50 12 .070 1.771.25 4 1.50 7 .020 1.231.12 5 1.50 4 .006 .993 2.38 2 2.50 45 .180 4.912.00 3 2.50 27 .075 3.551.75 4 2.50 18 .022 2.761.50 5 2.50 11 .007 2.071.25 6 2.50 7 .002 1.484 3.25 2 3.00 75 .200 8.953.00 3 3.00 50 .080 7.672.62 4 3.00 30 .025 5.942.25 5 3.00 20 .007 4.431.75 6 3.00 12 .002 2.766 4.75 2 4.00 150 .200 18.74.25 3 4.00 90 .080 15.03.50 4 4.00 55 .025 10.33.00 5 4.00 33 .007 7.672.50 6 4.00 22 .002 5.41NOTE: Body Size is in inches. Trim Number is in inches of seat diameter. Stroke is maximum plug lift in inches.Bore area of the cartridge is in square-inches.Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611
Valtek Severe Service EquipmentMicroCav TrimIntroductionMicroCav trim is used to effectively handle cavitation inValtek control valves that require small flow rates (maximumC Vvalues from 1.25 to 0.007). To effectivelyprevent cavitation damage, the preferred application iswith an angle-style valve body with hardened trim. Aslightly modified design can also be used on a limitedbasis for globe valve applications.DesignThe MicroCav design utilizes a special plug that isclosely guided within the seat ring. The plug head isdesigned with a series of special-engineered groovesthat continually expand as they progress diagonallyalong the length and around the circumference of theplug head (Figures 19 and 20) — allowing the groovesto continually intersect with each other. The fluid passesthrough the grooves, experiencing a continual increasein flow area while allowing for staged pressure reduction.Staged pressure reduction takes place as the fluidimpinges upon itself when the grooves intersect.Flow CharacteristicMicroCav trim has a modified equal percentage characteristicand a 40 to 1 rangeability.Table 8: MicroCav Trim Materials ofConstructionTrim Part Available MaterialsPlug 400 series stainless steel, solid Alloy 6Seat Ring 400 series stainless steel, solid Alloy 6Figure 19: MicroCav Plug UsesExpanding Grooves to Control CavitationSee Valtek Mark One Control Valves technical bulletin for basicvalve’s materials of construction.Table 9: MicroCav Trim C VValuesMaxC Trim No.VStrokeMaxC Trim No.VStroke1.25*1.25A 1.500.1200.50F 0.751.00*1.25B 1.500.1000.50G 0.750.80*1.00A 1.500.0800.50H 0.750.70*1.00B 1.500.0700.38A 0.750.500.69A 1.000.0500.38B 0.750.420.69B 1.000.0400.38C 0.500.350.69C 0.750.0300.38D 0.500.300.50A 0.750.0200.38E 0.500.250.50B 0.750.0150.38F 0.500.210.50C 0.750.0100.38G 0.500.180.50D 0.750.0070.38H 0.050.150.50E 0.75*Requires 1.5 - 2-inch valve.Figure 20: MicroCav Trim DesignFlowserve Corporation, Valtek Control Products, Tel. USA 801 489 861115
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