Mark One Control Valves

1 Mark One Control Valves2 valtek Mark One Control ValvesFlowserve Corporation, valtek Control Products, Tel. USA 801 489 8611 SOBody AssemblyThe mark one valve is typically double top-stem guidedand completely avoids contact between the plug andseat retainer. Many globe valve maintenance problemscan be traced to cage-guiding. The close metal-to-metal contact between the cage and plug often result ingalling and clamped-in seat and top-entry trim permits easy,quick maintenance. Plus, with the mark one valve shigh degree of parts interchangeability, fewer inventoryparts are required.

2 In addition, the actuator is lighter,smaller and easier to handle than comparable dia-phragm valtek Mark One Control valve is the industry choicefor a simple, reliable, tough globe valtek Mark OneTM globe Control valve offers superiorperformance in liquid and gaseous services, while alsopermitting easy, fast and inexpensive spring-cylinder actuated mark one valve providesstiffness and maintains high positioning accuracy, re-peatability, controlled high speed, and faithful mark one valve handles up to 150 psig ( barg)supply air and has the thrust to shut off against muchhigher fluid mark one valve is designed so the spring, supplyair pressure and fluid pressure itself combine to pro-duce exceptionally tight shutoff.

3 A self-aligning seat ringfurther enhances the shutoff capability of the Mark ThrustCylinder ActuatorThree standard sizes covermost applications. Each iseasily reversible andfeatures exceptionalstiffness, repeatability andlow hysteresisHigh PerformancePositioning accuracyto inch ( mm)Clamped-in Seat RingValve may be disassembledquickly and easily byremoving bonnet boltsFigure 1: Mark One Body AssemblyFail-safe springHeavy GuidingTwo widely spacedguides on large-diameterstem. Plug does notguide in retainerVersatilityANSI Class 600 (PN 100)body used for ANSI Class150, 300 and 600 (PN 16,40, 100) ratings through4-inch (DN 100)3 valtek Mark One Control ValvesFlowserve Corporation, valtek Control Products, Tel.

4 USA 801 489 8611 AdvantagesFeaturesDesign provides lowerHigh interchangeability between sizes and other valtek Control productstotal lifetime costValve design minimizes requirements for stocking spare partsRugged, heavy-duty parts provide extended lifeActuator design allows simple, easy maintenanceVersatileGlobe, angle, three-way, and jacket styles offer multiple face-to-facestandardsTrim that does not stick or gallDouble-stem guiding located out of flow streamGenerous clearance between plughead and seat retainerEliminates galling associated with cage-guidingEasy, fast and inexpensiveTop-entry servicingClamped-in seat ringEvenly compressed gasket controlled gasket compressionSeparable flangesHigh degree of parts interchangeabilitySmall, lightweight designLeakproof when closedSelf-aligning seat ringAssisted shutoff from fluid pressure, cylinder spring.

5 Cylinder pressureHigh-thrust, spring-cylinder actuatorSpring fails valve to desired position, pneumatics provide additional forceBuilt for toughest serviceCorrosion-resistant constructionHigh thrust overcomes high pressuresAnti-cavitation and noise-trim optionsHeavy-duty plug stemFactory Mutual approved as a fuel service valve ( - 3-inch/DN 20 - 80)Compact and easy to installCylinder actuator smaller than most competitor s actuatorsLower center of gravity than comparable actuatorsLighter weight means less pipe stress from static and dynamic loadsSeparable end flanges allow the valve to be installed in manyorientations and compensate for flange misalignmentReliable, predictable serviceStiff, high-thrust cylinder actuatorAccurate positioningHigh repeatabilityFaithful responseControlled.

6 High-speed stroking actionAdvantages and Features4 valtek Mark One Control ValvesFlowserve Corporation, valtek Control Products, Tel. USA 801 489 8611 SOFigure 2: Mark One Control ValveComponentsAdjusting ScrewSpringPiston Stem O-ringCylinderPistonPiston O-ringYoke O-ringStem ClampGland FlangeUpper PackingYoke ClampPacking SpacerBonnetBonnet FlangeAdjusting Screw GasketSpring ButtonPiston Retaining NutActuator Stem SpacerActuator Stem BushingActuator Stem O-ringActuator StemCylinder Retaining RingStroke PlateStem BellowsYokeUpper Stem GuideUpper Stem Guide LinerBonnet FlangeBoltingLower PackingBonnet GasketLower Stem GuideLower StemGuide LinerPlugSeat RetainerSeat RingSeat Ring

7 GasketBodyHalf RingEnd Flange5 valtek Mark One Control ValvesFlowserve Corporation, valtek Control Products, Tel. USA 801 489 8611 Body StylesFigure 5: Angle-style BodyExcept for the body and (DN 40) seat ring, theangle-style mark one valve is completely interchange-able with the globe style all other valve parts remainthe same. For additional body protection, a venturi seatring, extending to the outlet flange, is 4: Three-way BodyThree-way bodies are used for either combining ordiverting services. Due to Flowserve s excellent partsinterchangeability, a standard globe valve easily con-verts to three-way service with the addition of a three-way adaptor, upper seat ring, two gaskets, three-wayplug and longer bonnet flange 3: Globe-style BodyGlobe-style bodies feature smooth, streamlined,constant-area internal passages with no pockets,permitting high capacity with minimum turbulence.

8 Theyare designed with nearly constant wall thickness,providing lower weight and cost when manufactured inexpensive stainless or alloy 6: Steam-jacketed BodyThe steam-jacketed mark one valve uses a standardglobe style body with oversized, blind flanges for a fulljacket or standard flanges for a partial jacket. The jacketis rated for 150 psig ( barg) and is equipped with NPT supply and drain Mark One Control ValvesFlowserve Corporation, valtek Control Products, Tel. USA 801 489 8611 EndValveRatingANSI / One body facings come standard as raised face for eitherseparable and integral flanges.

9 To achieve better sealing withmating piping, the flange face is machined with spiral groovedserration. Other optional facings include smooth face, flat face,ring-joint, large and small tongue, and large and small End FlangesInterchangeable separable flanges are standard for valvebodies through 4-inch (DN 15 -100) in ANSI Class 150, 300and 600 (PN 16, 40, 100). With separable end flanges, an ANSIC lass 600 (PN 100) body can be adapted for ANSI Class 150,300 or 600 (PN 16, 40, 100) service by simply changing the flanges are usually furnished in carbon steel formaximum cost savings, although stainless steel can be speci-fied if FlangeThe bonnet flange incorporates the same separable design asthe end flanges and is normally manufactured in carbon steel.

10 However, it can be specified in stainless steel when Flange BoltingAll sizes use studs and nuts that are furnished in 304 and 316stainless steel, suitable for -423 to 1500 F (-253 to 816 C).These temperature limits are for maximum pressure permittedby ANSI , latest Connections, Flanges and BoltingFigure 7:Separable End and Bonnet FlangesTable 1: End ConnectionsBodyANSI Class 600(PN 100)BonnetFlangeBoltingBonnetFlangeEnd FlangeANSI Class 150(PN 16)Figure 8: End FlangesANSI Class 300 ANSI Class 600(PN 40)(PN 100)SeparableFlangeIntegralFlange Steel andAlloysScrewed(NPT) Mark One Control ValvesFlowserve Corporation, valtek Control Products, Tel.