Valdisk Control Valves

Valtek Valdisk Control Valves Control Valves Compact, field reversible actuator Jam-lever Toggle soft seal ANSI Class IV shutoff – metal seal ANSI Class VI shutoff – soft seal Non-selective disc and shaft for reduced cost Splined shaft with single pivot point for actuator to disc connection Self-centering seal Figure 1: Valdisk Design The high performance Valtek® Valdisk rotary control valve TM uses pressure assisted Jam-lever Toggle seating concepts to achieve bi-directional, bubble-tight shutoff while maintaining low breakout torque – at both high and low pressure drops. Valdisk is available...

Valtek Valdisk Control Valves Features and Advantages Valdisk’s high performance is assured by the following features: Features Jam-lever Toggle soft seat Bubble-tight shutoff equal to ANSI Class VI Low breakout torque assures accurate throttling, even close to the seat Non clogging seat design Easy removal Shutoff better than ANSI Class IV Disc pulls out of seat immediately, preventing seat wear Accurate throttling due to disc profile when rotating into the seat Lost motion minimized between shaft and actuator Uninterrupted gasket surface allows for a wide variety of gasketing Easier maintenance...

Valtek Valdisk Control Valves Seats Jam-lever Toggle seating concepts utilize the pressure drop across the valve to help energize the soft seat to bubble-tight shutoff in either flow direction, including alternating flow applications. This is done in such a way that seating capacity is increased as differential pressure is increased. Jam-lever Toggle soft seats achieve ANSI Class VI shutoff. Pressure shaft downstream Pressure shaft upstream Jam-lever Effect (Figure 3) As pressure enters the seat cavity with the shaft downstream, the seat jams or rotates into the disc, causing it to seat tighter...

Valtek Valdisk Control Valves Seats, FL Metal Seat Liquid Pressure Recovery Factor, FL Metal seats are used for applications involving temperatures higher than those permitted by the Jam-lever Toggle soft seat. The design incorporates a highly flexible lip, which assures full circle contact between the seat and disc when the valve is closed. Because of lip flexibility, breakout torque for the metal seat is the same or less than soft seat breakout torque. Valdisk metal seats achieve ANSI Class IV shutoff. The liquid pressure recovery factor, FL, predicts the amount of pressure recovery that will...

Valtek Valdisk Control Valves Specifications Table I: Maximum Allowable Shutoff Pressure Drops (psi)* Body: 316 stainless steel or carbon steel** Shaft & Pins: Nitronic 50 (4) Disc: 316 stainless steel Body: 316 stainless steel or carbon steel** Shaft & Pins: Nitronic 50 (4) Disc: 316 stainless steel Body: Hastelloy C Shaft & Pins: Hastelloy C Disc: Hastelloy C Seat: TFE/Glass-filled (2) Body: Alloy 20 (5) Shaft & Pins: Alloy 20 Disc: Alloy 20 Seat: TFE/Glass-filled (2) Shaft Upstream or Downstream Body: 316 stainless steel Shaft & Pins: 17-4 PH Disc: 316 stainless steel Seat: PEEK Body: Monel...

Valtek Valdisk Control Valves Specifications Table II: Maximum Allowable Inlet Pressures* for Various Body Ratings and Temperatures (psi) Temperature * For Maximum ∆P, refer to Table I. ** Values as recorded in ANSI B16.34-1988. Table III: Flow Coefficients/Flange Compatibility Body Size ANSI Rating Flange Compatibility Shaft down (pressure class)* Table IV: Seat Leakage Metal Seat Jam-lever Toggle Soft Seat Flow ring Dual Seat Table V: Estimated Shipping Weights (with Actuator and Positioner) Valve Size 150, 300 150 * Consult factory for higher pressure classes Flowserve Corporation, Valtek...

Valtek Valdisk Control Valves Specifications Table VI: Material Selection Temperature Chart Body / Disc 316 Stainless Steel Carbon Steel (1) Monel Hastelloy C Alloy 20 (2) 17-4 PH Nitronic 50 Inconel Monel Hastelloy C 304 Stainless Steel / TFE Lined Ultimet Alloy 6 Soft Seat Glass-filled TFE Virgin TFE PEEK Metal Seat PCTFE 316 Stainless Steel 316 Stainless Steel w/Alloy 6 Overlay TFE V-rings Glass-filled TFE V-rings Graphite Braided Asbestos Free (3) (1) Permissible at temperatures above 800° F (427° C), but not recommended for prolonged exposure at these elevated temperature because of the...

Valtek Valdisk Control Valves Mounting Orientations Shaft Upstream Right-hand Mounting (standard) Air-to-Open Fail Closed Air-to-Close Fail Open Shaft Downstream Right-hand Mounting (optional) Air-to-Open Fail Closed Air-to-Open Fail Closed Air-to-Close Fail Open Air-to-Close Fail Open Left-hand Mounting (optional) Air-to-Open Fail Closed Air-to-Close Fail Open Left-hand Mounting (standard) Actuator Orientation Handwheel Orientation Note: Orientations 2 and 4 are not available on some actuator sizes. Note: These orientations are in relation to the pipeline. 3 B Figure 9: Transfer Case Mounting...

Valtek Valdisk Control Valves Dimensions E DISASSEMBLY CLEARANCE Table VII: Valdisk Dimensions (inches / mm) BODY CLASSES 150, 300, 600 – 2 thru 8-inch; 150, 300 – 10 thru 12-inch (with Class 150 or 300 disc and shaft) Size (in.) Actuator Face-toSize Shaft Face* (sq.in.) Size A All dimensions are to be used for estimation only. Certified drawings will be supplied upon request. For 14 thru 30-inch Valdisk, contact factory. * MSS SP67 Body Only Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611

Valtek Valdisk Control Valves Dimensions, Ordering Information DISASSEMBLY CLEARANCE Table VIII: Handwheel and Extended, Heavy-duty Spring Dimensions (inches/mm) Actuator Size (sq. in.) Ordering Information The following information must be provided when ordering a Valdisk control valve: 1. Preferred body size and critical dimensions 2. Start-up and operating conditions: inlet and outlet pressures; temperature, flow rate, fluid’s specific gravity or molecular weight, vapor pressure or gas compressibility 3. Maximum operating temperatures and pressures 4. Body and disc pressure rating Flowserve...