Valtek ShearStream Control Valves

Transcription

1 Control Valves

2 Control Valves Compact, field-reversible actuator Lightweight, rugged one-piece body Splined ball-toshaft connection Bi-directional Flex-loc TM seal* ANSI Class IV shutoff metal seal ANSI Class VI shutoff soft seal designs Flangeless body standard, separable and integral optional No-shim design Self-centering seal Valtek XL 3, -inch ShearStream Design Optional sealed bearings V-notch segmented ball exceeds: 300 to 1 rangeability Shouldered post Uninterrupted gasket surface 1 through 2-inch ShearStream Design Optional sealed bearings Shaft NOTE: Actuator and valve neck rotated 90 degrees for illustration Figure 1: ShearStream Design Rugged describes the Valtek 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. 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 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 and - inch, ANSI Classes 1, 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 2 Flowserve Corporation, Valtek Control Products, Tel. USA

3 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 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 300:1 rangeability Excellent shearing action in fibrous fluid mediums 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 (3, -inch only) Full, uninterrupted gasket surface Standard face-to-face dimensions allow for easy field retrofitting of other manufacturers product lines Actuator is interchangeable with Valtek 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 Clamped 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 1 psi / 1034 kpa 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, 3 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. Flowserve Corporation, Valtek Control Products, Tel. USA

4 Standard Metal and Soft Seals Metal Seal Soft Seal Soft Seal Metal Seal / Flow Ring Dual Soft Figure 3: Standard Metal and Soft Seals Metal The standard soft seal design for ShearStream utilizes a 3 stainless steel or INCONEL metal seal and an additional PTFE or PEEK soft seal to provide ANSI Class VI shutoff. 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 back-up. This seal can also be used in either flow direction and is recommended for use in oxygen or corrosive services where 3 stainless steel or Inconel 6 are not compatible with the process fluid or ball material. 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. Bi-directional Metal Seals Metal Seals Metal Seals 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 a metal seal. As differential pressure increases, Flex-loc uses the pressure to increase sealing capacity. Pressure allows seal to flex into ball Figure 4: Principles of Bi-directional Flex-loc Seal Secondary seal locks primary seal to ball The Flex 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. The Loc Principle As pressure enters the cavity with the shaft upstream, the secondary seal locks the primary seal against the ball, causing it to seal tighter against the ball. 4 Flowserve Corporation, Valtek Control Products, Tel. USA

5 Specifications Part Table I: Material Selection Material B ody Carbon Steel, 3 SS, 3L SS, 304 SS, 304L SS, Monel, Hastelloy C, Hastelloy B/B-2, Alloy 20, Titanium Chrome Plated 317 SS, Stellite Facing, Chrome Plated 3L SS, Chrome Plated 304 SS, Chrome Plated 304L SS, Hastelloy C, Monel, Nickel Plated 317 SS, Alloy 20, Hastelloy B/B-2, Titanium S haft / Pin 17-4 PH, Nitronic, Nitronic /Stellite, Hastelloy C, K-Monel, Alloy 20, Hastelloy B/B-2, Titanium Bearings Seat Soft Ring Seat MBT, Stellite, Ultimet 3 SS, Inconel Glass filed PTFE, PEEK, TEFZEL P acking TFE V-ring, QuickSet 9001, AFPI, SafeGuard, SureGuard, SureGuard XT, 1303 FEP, Graphite Rib/Braid, TFE/Glass V-ring Seat Chrome Plated 3 SS, 3 SS w/ Stellite, Chrome Plated 3L SS, 3L w/ Stellite, Chrome Plated 304 SS, Chrome Plated 304L SS, Monel, Hastelloy C, Alloy 20, Hastelloy B/B-2, Titanium E nd Plug Carbon Steel, 3 SS, 3L SS, 304 SS, 304L SS, Alloy 20, Hastelloy C, Hastelloy B/B-2, Monel, Titanium End Yoke Seal Bolting Viton O-ring, Graphite Carbon Steel, Stainless Steel Table II: Flow Coefficients ( rotated 90 ) Size (inch) C V at 90 Shaft Downstream Rotation Shaft Upstream Seat Type Metal Dual Soft Bi-Directional Metal Flow Ring Description One metal seat ring One soft seat plus one metal backup seat One soft seat Two metal seat rings No seat Table III: Seat Configurations Shaft Orientation Downstream Upstream Upstream Upstream or Downstream Upstream or Downstream ANSI Leakage Class * Flow rings are intended for throttling applications. Leakage when fully closed is approximately ANSI Class II. IV VI VI IV II* Material Maximum Temperature ( F / C) 3 SS 300 / 1 M onel 400 / 204 I nconel 600 / 315 Filled-PTFE / Metal 3 / 177 F illed-ptfe 3 / 177 P EEK 0 / SS 300 / 1 I nconel 600 / 315 N / A 600 / 315 Flowserve Corporation, Valtek Control Products, Tel. USA

6 O Valtek ShearStream Dimensions ØJ E DISASSEMBLY CLEARANCE F H Valtek Beta Valve Size Actuator Size* A B C Table IV: ShearStream Dimensions (inches/mm) B ody Classes 1, 300, 600 (with Class 1 or 300 ball and shaft) D Spline Size* A B C D E F G H J K / G DISASSEMBLY CLEARANCE K DISASSEMBLY CLEARANCE E F S S SHUT OPEN P ØM N R Table V: Handwheel and Extended, Heavy-duty Spring Dimensions (inches/mm) Actuator Size ( sq. in.) E F M N P R Flowserve Corporation, Valtek Control Products, Tel. USA

7 Specifications Table VI: Estimated Shipping Weights with Standard Actuator and Positioner Valve Size F langeless Flanged * ( inch) ( lb. ) ( kg. ) ( lb. ) (kg.) / Allowable seat configurations for ShearStream control valves are set as a function of shaft orientation. Refer to Table III to determine seat type and shaft orientation. *Estimates based on Class 300 flanges. Size (inch) Table VII: End Connections ANSI Class End Connection /2 1 Integral, Flangeless 2 1 Integral, Flangeless 300 Integral*, Flangeless S eparable, Integral, Flangeless Separable, Integral, Flangeless Integral * ShearStream 2-inch, ANSI Class integral flange bolt holes are threaded. Table VIII: Valve Actuator Compatibility Actuator Size (sq. in.) Spring Size Std. Extd. Std. Extd. Std. Dual Std. Dual V alve Size (inch) / Table IX: Additional Specifications Characteristic: Equal Percent / Linear (characterization with positioner) Rotation: Counterclockwise to open when viewed from actuator ShearStream Sizing Procedures and data to size ShearStream valves including determining actuator size, are contained in Performance! valve selection software. Flowserve Corporation, Valtek Control Products, Tel. USA

8 Shaft Upstream Right-hand Mounting (standard) Air-to-Open Fail Closed Shaft Downstream Right-hand Mounting (optional) Air-to-Close Fail Open Air-to-Close Fail Open Air-to-Open Fail Closed Air-to-Open Fail Closed FLOW Air-to-Close Fail Open FLOW Air-to-Close Fail Open Air-to-Open Fail Closed Left-hand Mounting (optional) Left-hand Mounting (standard) Actuator Orientation Note: Orientations 2 and 4 are not available on some actuator sizes Handwheel Orientation Note: These orientations are in relation to the pipeline. C D A 3 3 B Figure 5: ShearStream Transfer Case Mounting 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, contact or call USA Haakon Ellingsen AS Årenga 8, N-1340 Skui P.O. Box 184, N-1309 Rud Phone Fax post@ellingsen.biz Flowserve and Valtek are registered trademarks of Flowserve Corporation. Regional Headquarters 13 N. Mt. Springs Prkwy. Springville, UT Phone Facsimile Tuas Avenue 20 Republic of Signapore Phone (65) Facsimile (65) , av. du Québec, B.P , Courtaboeuf Cedex, France Phone (33 1) Facsimile (33 1) Quick Response Centers 5114 Railroad Street Deer Park, TX USA Phone Facsimile Chelsea Parkway Boothwyn, PA USA Phone Facsimile Parkway View Drive Pittsburgh, PA USA Phone Facsimile FCD VLATB Flowserve Corporation. Flowserve Corporation, Valtek Control Products, Tel. USA