Throttle Trip Valves Brochure

Schutte & Koerting • 2510 Metropolitan Drive • Trevose, PA 19053 • USA • tel: (215) 639-0900 • fax: (215) 639-1597 • www.s-k.com • sales@s-k.com 1Throttle / Trip ValvesBulletin 8C• FLOW CONTROL AND AUTOMATIC SHUT-OFF IN ASINGLE VALVE ASSEMBLY• COMPACT, RUGGED DESIGN WITH MOTORIZED ORMANUAL OPERATION• VARIETY OF CONFIGURATION OPTIONS FOREXCEPTIONAL OPERATION AND INSTALLATIONVERSATILITYDescriptionSchutte & Koerting throttle/trip valves provide effectiveflow control and emergency shut-off operation in asingle, highly reliable valve assembly.As throttle valves, they are used to regulate flow ofsteam and gas in large, high-pressure pipe lines, suchas the main steam line serving a large, high-pressureturbine or a turboexpander gas supply line.As trip valves, they add a measure of safety critical tothese applications, without the expense of a separatetrip valve. When tripped either manually orautomatically, the valves rapidly shut down flow toprotect valuable equipment.Throttle Valve Function: The valve can be opened orclosed to any desired flow by means of a motorizedoperator or manual handwheel.An integral pilot valve opens first as the spindle isrotated, releasing steam in the balancing chamber tothe downstream side. This reduces chamber pressureto well below inlet line pressure to ease subsequentopening of the main disc.Trip Valve Function: The trip valve mechanism isactivated by means of an air cylinder, oil cylinder, orsolenoid. A manual lever can also be provided.When tripped, the latch lever is automaticallydisengaged from the latch hook. Working withthe pressure of the internal steam or gas, apowerful compression spring in the yoke forcesthe entire spindle mechanism against the seat. Amanual lever can be provided for operatoroverride.Schutte & Koerting • 2510 Metropolitan Drive • Trevose, PA 19053 • USA • tel: (215) 639-0900 • fax: (215) 639-1597 • www.s-k.com • sales@s-k.com2Throttle / Trip Valves Bulletin 8CDesign FeaturesReduce load on disc for smooth opening. S&Kthrottle/trip valves feature an internal pilot valvearrangement to relieve pressure on the main disc as thevalve is opened.Reduced distortion. The seal-welded seat ring isshrink-fit to the body and includes an expansion groove,to prevent distortion of the seating face.Durable materials improve performance and reducewear. Wear-resistant materials - including hardened,nitrided stems and bushings - are used at all criticalpoints to ensure long service life and eliminate softpacking. Flexitallic-type gaskets provide positive sealingat all cover joints.Simple on-line maintenance. S&K throttle/trip valvesare designed for simple on-line adjustment of the yokeand latching assembly.Low-friction operation. Optional ball bearing, threadedspindle and latching mechanisms are available to providemechanical assist for reliable low-friction operation.Compact configuration. Venturi seats can be providedin high-pressure applications, reducing spacerequirements and allowing use of smaller operators.Choice of connections. Valves may be specified withwelded ends or ANSI flange connections for directconnection to steam turbines.Configuration OptionsSchutte & Koerting offers three basic body designs and avariety of configuration options to help you obtain theideal throttle/trip valve according to your service andinstallation requirements. In addition to theconfigurations described below, our highly experiencedengineers can work with you to design a valve to meetvirtually any application need.Standard Body DesignsThrough-Hole SpindleDesign• Used with 6” dia. and largervalves, or any valve in high-pressure (over 600 lb)service.• Provides equal distribution ofspindle forces.Top & Bottom-GuidedSpindle Design• Used with 4” and 5” valveswhere line pressure does notexceed 600 lbs.• Pilot valve stem guideprovides rigidity and ensuresproper alignment of disc toseat.Top-Guided Spindle Design• Used with 3” valves whereline pressure does notexceed 600 lbs.• Spindle terminates at themain disc.Corner Body Design• Available configuration for anyof the standard body stylesabove.• Gas/Steam outlet can beplaced on either the right orleft side, as required by theinstallation.OIL TRIP CYLINDER• Provides automatic shutdown of valve during pressure drop toprotect the turbine from damage.• Mounted on the valve yoke and connected to the turbine controloil line.Oil CylinderCompression SpringSpring CaseAdjusting NutPiston StemSlotted LinkTrip CrankSeal WasherPiston• Turbine control oil holds compression spring in place to keepvalve open during normal operation.• When oil pressure drops below limit, the spring immediatelyoverpowers the oil and disengages the latch mechanism allowingthe large yoke spring to close the valve.Schutte & Koerting • 2510 Metropolitan Drive • Trevose, PA 19053 • USA • tel: (215) 639-0900 • fax: (215) 639-1597 • www.s-k.com • sales@s-k.com 3Bulletin 8CThrottle / Trip ValvesOVERHEADINSTALLATION• Used where valves areactuated from b e l o wpipeline.• Inverted valve handwheel,pilot valve and main valvedisc./seat.• Extension spring used onthe tripping mechanisminstead of compressionspring.• Motor operators andtripping devices available.MOTORIZEDOPERATION• Equipped with motoroperator and manual override.• “Explosion-proof”* motorused in connection with agas turbo-expander.• Can be incorporated intoany S&K throttle/trip valvedesign.* N.E.C. Class 1, Groups A,B, C or DTOP INLET, INCLINEDHANDWHEEL ARRANGEMENT• Inverted valve orientation with inlet at thetop.• Upright, inclined hand-wheel operatesthe spindle through a bevel gear and pinion arrangement.• Can be equipped with motor operatorsand tripping devices.HandwheelRotation PlateYokePivot PointScrew SpindleFriction WasherThrottle ScrewDisc FlangePilot Valve SeatMain DiscMain Valve SeatCompression SpringTrip HookLatching LeverSliding NutLeak-Off BushingYoke FlangeBodyBalancing ChamberPilot Valve DiscThru-SpindleFig. 8950Fig. 8910-MOFig. 8995Schutte & Koerting • 2510 Metropolitan Drive • Trevose, PA 19053 • USA • tel: (215) 639-0900 • fax: (215) 639-1597 • www.s-k.com • sales@s-k.com4Throttle / Trip Valves Bulletin 8CSPECIFICATIONS - FIG. 8910Size(PipeConn.In In.)Dimensions, In Inches1KFactor2A B C D E FFOR PRESSURES TO 300 LBS. WSP (WORKING STEAM PRESSURE)3 13 6 1/2 - 30 9/16 12 - 4.64 14 3/4 7 3/8 - 31 13/16 12 5 4.36 18 1/2 9 1/4 16 1/2 43 1/8 16 7 1/8 4.08 24 12 18 5/8 46 1/8 16 9 1/4 3.710 30 1/4 15 1/8 19 5/8 48 1/2 16 10 1/4 3.612 34 17 22 3/8 55 5/8 20 13 3/8 3.5FOR PRESSURES TO 400 LBS. WSP3 13 3/4 6 7/8 - 30 9/16 12 - 4.64 15 1/2 7 3/4 - 31 13/16 12 5 4.36 19 1/2 9 3/4 16 1/2 43 1/8 16 7 1/8 4.08 25 12 1/2 18 5/8 46 1/8 16 9 1/4 3.710 31 1/4 15 5/8 19 5/8 48 1/2 16 10 1/4 3.612 35 17 1/2 22 3/8 55 5/8 20 13 3/8 3.5FOR PRESSURES TO 600 LBS. WSP3 13 3/4 6 7/8 - 30 9/16 12 - 4.64 15 3/4 7 7/8 - 31 13/16 12 5 4.36 20 10 16 1/2 43 1/8 16 7 1/8 4.08 25 3/4 12 7/8 18 5/8 46 1/8 16 9 1/4 3.710 32 16 19 5/8 48 1/2 16 10 1/4 3.612 35 3/4 17 7/8 25 1/4 55 5/8 30 13 3/8 3.5FOR PRESSURES TO 900 LBS. WSP3 15 7 1/2 11 11/16 30 9/16 12 4 1/2 4.64 17 8 1/2 12 5/8 31 13/16 12 5 7/16 4.36 22 11 16 3/4 43 1/8 16 7 3/8 4.08 28 14 18 3/4 46 1/8 16 9 3/8 3.710 35 17 1/2 19 5/8 48 1/2 16 10 1/4 3.612 39 1/2 19 3/4 25 1/4 59 11/16 24 13 3/8 3.5Size(PipeConn.In In.)Dimensions, In Inches1KFactor2A B C D EFOR PRESSURES TO 300 LBS. WSP (WORKING STEAM PRESSURE)3 13 6 1/2 6 1/4 31 12 4.64 14 3/4 7 3/8 7 1/4 33 7/16 12 4.35 16 3/4 8 3/4 8 9/16 34 15/16 12 4.26 18 1/2 9 1/4 10 5/16 41 3/8 16 4.08 24 12 13 7/16 44 16 3.710 30 1/4 15 1/8 16 1/8 45 3/4 16 3.6FOR PRESSURES TO 400 LBS. WSP3 13 3/4 6 7/8 6 1/4 31 12 4.64 15 1/2 7 3/4 7 1/4 33 7/16 12 4.35 17 1/2 8 3/4 8 9/16 34 15/16 12 4.26 19 1/2 9 3/4 10 5/16 41 3/8 16 4.08 25 12 1/2 13 7/16 44 16 3.710 31 1/4 15 5/8 16 1/8 45 1/2 16 3.6FOR PRESSURES TO 600 LBS. WSP3 13 3/4 6 7/8 6 1/4 31 12 4.64 15 3/4 7 7/8 7 1/4 33 7/16 12 4.35 18 9 8 9/16 34 15/16 12 4.26 20 10 10 5/16 41 3/8 16 4.08 25 3/4 12 7/8 13 7/16 44 16 3.710 32 16 16 1/8 45 1/2 16 3.6FOR PRESSURES TO 900 LBS. WSP3 15 7 1/2 6 1/2 31 3/16 12 4.64 17 8 1/2 7 5/8 33 13/16 12 4.35 20 10 8 9/16 34 15/16 12 4.26 22 11 10 3/4 41 5/8 16 4.08 28 14 13 3/4 44 1/8 16 3.710 34 17 16 5/8 45 3/4 16 3.6SPECIFICATIONS - FIG. 89501. Above dimensions are approximate. Certified outline dimension printswill be submitted for approval upon receipt of order.2. Request technical data for calculating pressure drop using “K” factors.AB BFCDEAB BCDEFig. 8910 Fig. 8950120712ISO9001Certified