Valtek ShearStream. Valtek ShearStream. Control Valves

Transcription

1 Control Valves 1

2 Control Valves Compact, field reversible actuator Bi-directional Flex-loc TM seal* ANSI Class IV shutoff - metal seal ANSI Class VI shutoff - soft seal designs Lightweight, rugged one-piece body Self-centering seal Flangeless body standard, separable and integral optional No-shim design Valtek Beta Shouldered post NOTE: Actuator and valve neck rotated 90 degrees for illustration Splined ball-toshaft connection V-notch segmented ball exceeds: 300 to 1 rangeability Uninterrupted gasket surface Figure 1: 3 through 12-inch ShearStream Design "Rugged" describes the ShearStream ball valve. Designed to overcome the problems of harsh, particle entrained processes, ShearStream also provides accurate, reliable control in a broad range of applications, such as chemical, power and petroleum, etc. ShearStream addresses and solves many long-standing challenges faced by traditional ball valves, such as: Piping forces that unevenly load the seal Low rangeability due to limited orifice characterization Unsatisfactory shutoff capabilities 2

3 Control Valves Compact, field reversible actuator Bi-directional Flex-loc TM seal* ANSI Class IV shutoff - metal seal ANSI Class VI shutoff - soft seal designs Flangeless body standard, integral flange optional Self-centering seal Lightweight, rugged one-piece body No-shim design Valtek Beta Shouldered post Optional sealed bearings Uninterrupted gasket surface Splined ball-toshaft connection V-notch segmented ball exceeds: 300 to 1 rangeability Optional sealed bearings Figure 2: 1 through 2-inch ShearStream Design NOTE: Actuator and valve neck rotated 90 degrees for illustration ShearStream achieves Class IV shutoff with a metal seal and Class VI with the Flex-loc TM * soft seal. In addition to the standard wafer body design, ShearStream is available with separable or integral flanges. ShearStream is available in sizes 1 through 12-inch, ANSI Classes 150, 300, and 600, and in stainless steel, carbon steel and other alloys. The following page lists many important features and options which ShearStream uses to fulfill these and other requirements for ruggedness and high-performance. * patented 3

4 Features and Advantages ShearStream utilizes numerous features for ruggedness and high performance: Features One-piece body Segmented V-notch ball Pressure assisted/bi-directional Flex-loc TM seal (Patented) Self-centering seal No-shim seal Thick-walled retainer Flangeless design standard Separable flange option Integral flange option Advantages High performance ensured regardless of flange torque loads Seal tightness not altered by piping forces, as in two-piece bodies One leak path eliminated Clogging reduced "V" shaped orifice exceeds 300 to 1 rangeability Shearing action in fibrous fluid mediums is excellent. Metal seal provides greater than ANSI Class IV shutoff Soft seals achieve ANSI Class VI shutoff Seal installation improved and simplified Shutoff further improved Servicing and installation problems reduced Valve's normal service life extended in erosive environments Reduced cost Bolt length reduced, avoiding bolt stretch and leakage in event of fire Flange bolting aligns easier Reduced cost with alloys Bolt length reduced, avoiding bolt stretch and leakage in event of fire ShearStream has additional features for increased performance and serviceability: Interchangeability Seal replaceable without removing ball and shaft Shaft serviceable from outboard end of ball Full, uninterrupted gasket surface Standard face-to-face dimensions allow for easy field retrofitting of other manufacturers product lines Actuator is interchangeable with Valdisk eccentric disc valve Maintenance is fast and easy The need for actuator removal to replace ball and shaft is eliminated Shaft protected from blowout Gasket alignment problems reduced Wider range of gasketing possible, including spiral-wound ShearStream also capitalizes on established features of Valtek quality: Double acting, cylinder actuator Modular spool-type, four-way positioner Splined shaft Available in variety of materials High-thrust, compact, lightweight Actuator fully interchangeable with Valdisk rotary valve actuator Actuator air pressures allowable up to 150 psi Calibration and maintenance are simple Convertible between pneumatic and electro-pneumatic Extra strength provided with no lost motion or dead band Materials include carbon steel, 316 stainless steel and other alloys Each ShearStream feature contributes to a product measurably superior to other ball valves, as illustrated by the following pages which contain additional information and specifications 4

5 Metal Seals Back-up Ring Metal Seal Back-up Ring Metal Seal Retainer Body Retainer Body Pressure allows seal to flex into ball Ball Figure 3: Principles of Bi-directional Flex-loc Seal Flex-loc Sealing Flex-loc sealing uses the pressure drop across the seal to enhance its shutoff characteristics in either flow direction. It achieves ANSI Class IV with metal seal and ANSI Class VI with a soft seal. As differential pressure increases, Flexloc uses the pressure to increase sealing capacity. The Flex Principle The Loc Principle As pressure enters the cavity with the shaft downstream, the flexible seal deflects into the ball, causing it to seal tighter against the ball. Back ring lock metal seal to Ball As pressure enters the cavity with the shaft upstream, the back-up ring locks the seal against the ball, causing it to seal tighter against the ball. Soft Seals The standard soft seal design for ShearStream utilizes a 316 stainless steel or Inconel metal seal and an additional Teflon or PEEK soft seal. This seal design provides for back-up of the soft seal in case of failure and also provides for additional wiping and shearing capability. In some instances such as in alloy valves; a metal back-up seal cannot be used because of the potential for galling on an unhardened, uncoated ball. When this is the case, a special design is available called the alloy soft seal which does not use a metal seal backup. This seal can also be used in either flow direction and is recommended for use in oxygen or corrosive services where 316 stainless steel or Inconel 625 are not compatible with the process fluid or ball material. Back-up Ring Retainer Metal Seal Soft Seal Ball Body Retainer/ Flow Ring Soft Seal Ball Body Standard Alloy Figure 4: Soft Seals Flow Rings Hardened flow rings without a soft seal may be used in severe service applications. Flow rings can throttle flow to approximately 2 percent of valve capacity. 5

6 Specifications Table I: Flow Coefficients (Ball rotated 90 ) Size (inches) Upstream Downstream / Table II: Maximum Allowable Inlet Pressures for Various Body Ratings (1) and Temperatures(psi) Temp. Carbon Steel 316 Stainless Steel ( F) Pressure Class Pressure Class 150, 300, , 300, to (1) Body ratings are ANSI B Table III: Seal Leakage Type Material ANSI Class Bidirectional Flex-loc 316 SS IV Metal Seal Monel IV Inconel IV Bidirectional Flex-loc Teflon/Filled-Teflon VI Soft Seal Alloy Body Soft Seal Teflon/Filled-Teflon VI Table IV: Material Selection Part Material Temperature Range ( F) Body 316 Stainless Steel -20 to 1200 Carbon Steel -20 to 800 Ball 317 Stainless Steel -20 to 700 w/hard chrome plating Stellite -20 to 1200 Shaft 17-4 PH; Nitronic to 550 Nitronic 50 w/stellite overlay -20 to 1200 Inconel w/colmonoy overlay -20 to 1200 Bearings Filament Wound Glass -20 to 325 w/teflon lining PEEK -20 to 500 Stellite No to 1200 Metal Seal 316 Stainless Steel -20 to 550 Inconel to 1100 Stellite flow ring -20 to 1200 Soft Seal Glass filled Teflon -20 to 350 PEEK -20 to 500 Packing (1) Teflon V-rings -20 to 400 Teflon/glass filled V-rings -20 to 425 Grafoil -20 to 600 Non-asbestos braided -20 to 550 Packing Teflon V-rings -20 to 600 with Teflon/glass filled V-rings -20 to 600 extension Grafoil -20 to 1200 Non-asbestos braided -20 to 900 Retainer Seal Viton O-ring -20 to 450 Bearing Seal Viton O-ring -20 to 450 Body Plug Seal Viton O-ring -20 to 450 Grafoil -20 to 1200 Body Flange Teflon -0 to 450 Seal Spiral Grafoil -20 to 1200 NOTE: For temperatures less than -20 O contact factory (1) Fugitive emissions packing available, contact factory 6

7 Dimensions E DISASSEMBLY CLEARANCE F C L H SEAT DIA. J DIA. G K DISASSEMBLY CLEARANCE D B A M Table V: ShearStream Dimensions Body Classes 150, 300, and 600 Actuator Face-to- Size Size Shaft Face (in.) (sq.in.) Size A B C D E F G H J K L M / Additional Specifications Characteristic: Equal Percent / Linear (characterizable with positioner) Table VI: Estimated Shipping Weights with Standard Actuator and Positioner Ball Rotation: Counterclockwise to open when viewed from actuator Valve Size (inches) Weight (pounds) ShearStream Sizing Procedures and data to size ShearStream valves including determining sealing/breakout torques and actuator sizing are contained in Valtek s Sizing and Selection Manual, Sections 3 and 16. 1, 1 1 /2,

8 Flowserve Corporation has established industry leadership in the design and manufacture of its products. When properly selected, this Flowserve product is designed to perform its intended function safely during its useful life. However, the purchaser or user of Flowserve products should be aware that Flowserve products might be used in numerous applications under a wide variety of industrial service conditions. Although Flowserve can (and often does) provide general guidelines, it cannot provide specific data and warnings for all possible applications. The purchaser/user must therefore assume the ultimate responsibility for the proper sizing and selection, installation, operation and maintenance of Flowserve products. The purchaser/user should read and understand the Installation Operation Maintenance (IOM) instructions included with the product, and train its employees and contractors in the safe use of Flowserve products in connection with the specific application. While the information and specifications presented in this literature are believed to be accurate, they are supplied for informative purposes only and should not be considered certified or as a guarantee of satisfactory results by reliance thereon. Nothing contained herein is to be construed as a warranty or guarantee, express or implied, regarding any matter with respect to this product. Because Flowserve is continually improving and upgrading its product design, the specifications, dimensions and information contained herein are subject to change without notice. Should any question arise concerning these provisions, the purchaser/user should contact Flowserve Corporation at any of its worldwide operations or offices. For more information, contact: For more information about Flowserve and its products, contact or call USA Manufacturing Facilities 1350 N. Mt. Springs Prkwy. Springville, UT Phone Facsimile Parkway View Drive Pittsburgh, PA USA Telephone Facsimile Quick Response Centers 5114 Railroad Street Deer Park, TX USA Telephone Facsimile Chelsea Parkway Boothwyn, PA USA Telephone Facsimile Manderscheidstr Essen, Germany Telephone (49) Facsimile (49) Alläe du Quartz 1 CH-2300 La Chaux-de-Fonds Switzerland Telephone (41) Facsimile (41) Flowserve Corporation. Flowserve and Valtek-Kammer are registered trademarks of Flowserve Corporation.