Worldwide Diverter Valves - SchuF

1 Diverter Valves 3, 4, 5, and Multi-WayFetterolf Corporationphone: +1 610 584 (USA) : +1 843 881 Valve Technology GmbHphone: +353 (0)21 Chemieventile Vertriebs GmbH & Co. KGphone: +49 (0 )6198 571100fax: +49 (0 )6198 Tecnovalvo : +39 (UK) : +44 203 355 KINGDOMYour Local Agent:Your Sales Channel: SchuF Speciality Valves India Pvt. : +91 421 Benelux +31 25 12 34 448 Armaturen MEphone: +55 19 98013503 South East Asia Pte. +31 62062 6664 Valves China +85 22 86 50 86 1 Valve Configuration OptionsOperating PrinciplesIn its simplest form a Diverter valve has oneinlet and two outlets or vice versa. When the medium flows through the inlet itcan either be routed to 1)outlet A only, 2)outlet B only, or 3)to both outlet A and Bsimultaneously. This is achieved by two pistons(or discs) that move into the valve body andcover all or part of the outlets from either action results in a completely dead spacefree , the valve can have multiple inletsand outlets.

2 This allows for different substan-ces to be brought together as required androuted to one or multiple lines or Way R type Diverter Valve32 The Diverter valve was invented by SchuF in1965. The first Diverter Valves were the simplecombination of two or more piston or disc the past 45 years, SchuF Fetterolf developedthis original idea into a valve category in its ownright. The name comes about as a result of thefact that the construction enables a processflow to be diverted (or routed) into two or moredirections. Diverter Valves are sometimes calledswitch Valves , multi-way, or combination Valves . Diverter Valve ApplicationsDiverter Valves have the primary purpose ofsplitting or combining process media into one or more streams. They can be widely found inthe chemical, polymer, and refining industriesand are used in a broad variety of applications: To split one large process line into many smaller lines To replace several isolation Valves and T-pieces in order to eliminate back flushing of dead spaces To keep one line in service whilst maintaining another Switching between filters, without downtime or pressure and flow variations To switch between control Valves or pumps For high viscosity media, where dead or slow spaces lead to poor product quality To combine a process isolation and a start up dump valve in one valve body Where space does not permit larger Valves or extensive piping To integrate multiple valve process functions into one valveKey Features & Options Modular design 2, 3, 4, or multiple inlets / outlets Dead space free.

3 Unimpeded flow Slow space avoidance Metal to metal bubble tight seal Stuffing box seal to atmosphere Rotating and contoured pistons / discs Control functionality option Repairable in place Customised designDiverter Valves General Overview1. T Type Diverter Valves with 90 inlet / outlet angle2. T Type Diverter Valves with 45 or 60 inlet / outlet Type Diverter Valves with outlet at right angle to Valve with multiple bi-directional inlets or Star Design Diverter ValveDiverter Valve Configuration OptionsOperating PrinciplesIn its simplest form a Diverter valve has oneinlet and two outlets or vice versa. When the medium flows through the inlet itcan either be routed to 1)outlet A only, 2)outlet B only, or 3)to both outlet A and Bsimultaneously. This is achieved by two pistons(or discs) that move into the valve body andcover all or part of the outlets from either action results in a completely dead spacefree , the valve can have multiple inletsand outlets.

4 This allows for different substan-ces to be brought together as required androuted to one or multiple lines or Way R type Diverter Valve32 The Diverter valve was invented by SchuF in1965. The first Diverter Valves were the simplecombination of two or more piston or disc the past 45 years, SchuF Fetterolf developedthis original idea into a valve category in its ownright. The name comes about as a result of thefact that the construction enables a processflow to be diverted (or routed) into two or moredirections. Diverter Valves are sometimes calledswitch Valves , multi-way, or combination Valves . Diverter Valve ApplicationsDiverter Valves have the primary purpose ofsplitting or combining process media into one or more streams. They can be widely found inthe chemical, polymer, and refining industriesand are used in a broad variety of applications: To split one large process line into many smaller lines To replace several isolation Valves and T-pieces in order to eliminate back flushing of dead spaces To keep one line in service whilst maintaining another Switching between filters, without downtime or pressure and flow variations To switch between control Valves or pumps For high viscosity media, where dead or slow spaces lead to poor product quality To combine a process isolation and a start up dump valve in one valve body Where space does not permit larger Valves or extensive piping To integrate multiple valve process functions into one valveKey Features & Options Modular design 2, 3, 4, or multiple inlets / outlets Dead space free.

5 Unimpeded flow Slow space avoidance Metal to metal bubble tight seal Stuffing box seal to atmosphere Rotating and contoured pistons / discs Control functionality option Repairable in place Customised designDiverter Valves General Overview1. T Type Diverter Valves with 90 inlet / outlet angle2. T Type Diverter Valves with 45 or 60 inlet / outlet Type Diverter Valves with outlet at right angle to Valve with multiple bi-directional inlets or Star Design Diverter ValveValve and Process EfficiencySchuF s attention to quality and ensuring optimal valve efficiency is reflected in our useof finite element simulation analysis. These simulations enable us to advise the bestvalve design for a specific process. The example below shows the results of a valvesimulation for a polymer like medium. Each flow line is colour coded to show how farthe polymer will have travelled in a given blue shows how far the polymer wouldtravel in the first 2 seconds, light blue in sixseconds, green in 9 seconds, yellow in 13seconds and so on.

6 The simulation shows thatthere are variances in residence time betweenthe flow in the centre and the flow through thecorners. The pressure drop is less than 1 bar. For many applications this level of performanceis superior to existing valve solutions. However,certain media (such as polyester) necessitatethe elimination of even the slightest slow spaces. Without this consistent high quality end product cannot be has been able to successfully producevalves for these slow and dead space appli-cations. In fact it has also led to other SchuF "process customised" designs and in turn toimproved customer end product and more efficient valve consists of several key parts anenclosed cast, forged or welded body, two ormore pistons or discs (depending on the num-ber of inlets and outlets required), a stuffingbox, packing rings, gearing, a hand wheel andelectric, hydraulic, or pneumatic actuation. Design OptionsA standard Y typediverter valve with one inletand two outlets is illustrated in the picturebelow:The process flow enters the top connection andthe outlet flow is to either or both of the outletlines existing in parallel below the valve body.

7 The R typediverter valve (illustrated on page 6)is similar to the Y type except that the outletsare at right angles to the inlet flow. This designfrequently utilises rotating, contouredpistons/rams on one or both sides to assuresmooth, unobstructed flow. This is a particularlyuseful feature for highly viscose media such aspolymer or heavy gas oil with high solids Fetterolf also provides a T typeand an S Type(short for Star configuration with multi-ple inlets and outlets) Diverter Valves . In alldesigns the angular relationship of the outletports may be changed to meet the requirementsof the installation. Special designs are also avai-lable for large size Valves or high flow heat jacketing is available in all designs andmay be zoned so that only the flowing side and Efficient DesignDiverter Valve FE simulation3 Way Y type Diverter ValveINLETOUTLETP rocess Dead Space ProblemsDead space can lead to many unwelcome consequences.

8 In plastic and polymer pro-duction, the medium can becontaminated by trapped particles, rendering it worthless. In the refinery,dead space can lead to accumulation of coke likeparticles, catalyst fines orclumps which necessitatesback flushing and therebyreduces line capacity. Traditional IsolationApproach Traditionally, isolation valvesinterconnected with T-piecepiping are used to isolate the process flow inone direction. This is achieved by using two ballvalves and a T-piece as shown one of the ball Valves is closed and the medium contains solid particles or highlyviscose liquid, a DeadSpace is created by themedium in and around theball, between the ball andthe valve body, and in theleft section of the T-piece. The dead space area isshown in black in thesecond drawing. When thisball valve is opened, part ofthe residue that filled thedead spaces will either stickto the piping reducing thefull through bore and overtime require the valve to beremoved for the residue willform clumps that over timebreak away to damage other equipment down-stream or contaminate other media in the batches that and Slow Space The Process KillersThe clean and modern alternative is a SchuFFetterolf Diverter valve as illustrated above.

9 The piston seals flush to the inlet body in theclosed position and flush with the outlet take off point in the open position. The media can flow freely through the valveand there are no cavities, spaces or areas wheresediment can stick or accumulate. For allintents and purposes, the SchuF Diverter valvebecomes a full bore extension of the space is eliminated!The Modern Alternative543 Way T type Diverter Valve Dead Space Free, unimpeded flow2. Cross sectional drawing of Ball Valve and T-piece arrangementValve and Process EfficiencySchuF s attention to quality and ensuring optimal valve efficiency is reflected in our useof finite element simulation analysis. These simulations enable us to advise the bestvalve design for a specific process. The example below shows the results of a valvesimulation for a polymer like medium. Each flow line is colour coded to show how farthe polymer will have travelled in a given blue shows how far the polymer wouldtravel in the first 2 seconds, light blue in sixseconds, green in 9 seconds, yellow in 13seconds and so on.

10 The simulation shows thatthere are variances in residence time betweenthe flow in the centre and the flow through thecorners. The pressure drop is less than 1 bar. For many applications this level of performanceis superior to existing valve solutions. However,certain media (such as polyester) necessitatethe elimination of even the slightest slow spaces. Without this consistent high quality end product cannot be has been able to successfully producevalves for these slow and dead space appli-cations. In fact it has also led to other SchuF "process customised" designs and in turn toimproved customer end product and more efficient valve consists of several key parts anenclosed cast, forged or welded body, two ormore pistons or discs (depending on the num-ber of inlets and outlets required), a stuffingbox, packing rings, gearing, a hand wheel andelectric, hydraulic, or pneumatic actuation. Design OptionsA standard Y typediverter valve with one inletand two outlets is illustrated in the picturebelow:The process flow enters the top connection andthe outlet flow is to either or both of the outletlines existing in parallel below the valve body.