High capacity, spring loaded swing type wafer check valve Features Lightweight, wafer type check valve with face-to-face dimensions according ISO 5752, table 5 long High flow capacity featuring a special shaped disc with a large opening angle resulting in high K v values Spring loaded disc for positive shut-off Choice of cast iron or stainless steel body types Field replaceable O-ring seat Internal travel stop prevents the disc from slamming against the pipe Excellent low pressure shut-off The standard low pressure shut-off is less than.1 bar (1 kpa) Slam free operation Optional heavy spring for slam free operation in systems with high decelerations Optional light spring for systems with low line velocities Optional adjustable travelstop for system with reduced inner diameter pipe General applications Back flow prevention in pump or multi-pump systems High slam risk systems up to flow deceleration of 25 m/s 2 Combined low line velocity and low pressure tightness Vacuum breaker for storage tank protection High capacity/low pressure drop to ensure economical use Not suitable for pulsating applications Technical data Sizes (DN): 4-3 Temperature ( C): -4 to +19 Pressure (bar/kpa): 16/16 Flange acc.: PN 6/1/16/25 asme 15/3 as 2129 C, D & E (multi) JIS 5/1/16/2/3 Emerson.com/FinalControl 217 Emerson. All rights reserved. VCTDS-1429-EN 17/12
12 11 9 5 7 4 1 8 A Q C B 3 6 2 1 D Dimensions (mm) Size DN A B (PN1/PN16) B1 B2 C D E Q 4 47. 94 - - 22. 33 54 38.9 5 6. 19 98 15 34. 43 59 5 1.4 65 7 129 111 124 43.5 46 6 65 1.9 8 82.5 144 13 137 59.5 64 62 78 3. 1 114.3 162 162 175 77. 64 6 12 3.7 125 132. 194 194 197 98. 7 61 126 5.6 15 168. 22 215 222 115. 76 72 149 8.2 2 22. 272 272 279 158. 89 7 196 12.4 25 267. 33 336 34 185. 114 66 25 23.3 3 324. 38/386 38 41 24 114 65 298 33. Mass (kg) Note Dimension B is the outside diameter for ISO PN 1/PN 16 flange drilling. Dimension B1 is the outside diameter for AS 2129 C, D & E flange drilling. Dimension B2 is the outside diameter for ASME 15 flange drilling. Dimension Q is the chordal disc dimension at the outlet face of the valve for disc clearance into pipe fitting or equipment. Material selection Body Disc Seat Shaft Trim no. Sizes (DN) Cast iron Stainless steel EPDM Stainless steel 23 4-3 NBR 24 4-3 Fluorelastomer 25 4-3 Stainless steel Stainless steel NBR Stainless steel 28 5-3 Fluorelastomer 27 5-3 2
Parts LIST Part Name 1 Body 2 Disc 3 Shaft 4 Plug 5 Seal 6 O-ring 7 Bushing 8 Travel stop 9 Tagplate 1 Spring 11 Rivet 12 Eye bolt Material specification Part name Material EN/ASTM designation EN mat. no. Remark Body Cast iron GJL-25 JL-14 Stainless steel GX5CrNiMo19-11-2 / CF8M 1.448 Disc Stainless steel GX5CrNiMo19-11-2 / CF8M 1.448 Shaft Stainless steel X5CrNiMo17-12-2 / 316 S/S 1.441 Plug Stainless steel X5CrNiMo17-12-2 / 316 S/S 1.441 Bushing Stainless steel X5CrNiMo17-12-2 / 316 S/S 1.441 Travel stop Stainless steel X5CrNiMo17-12-2 / 316 S/S 1.441 Optional Spring Stainless steel X5CrNiMo17-12-2 / 316 S/S 1.441 Seal PTFE O-ring NBR EPDM Fluorelastomer Tag plate Aluminium Rivet Aluminium Eye-bolt Steel galvanized Size 125-3 Pressure-Temperature Diagram Size range Valve function Temperature in C Seat material Disc material Body material DN (mm) Wafer/end of line -6-4 -3-2 -15 5 1 12 13 16 19 Notes EPDM all all all W 16 Bar 1 NBR all all all W 16 Bar 2 FKM all all all W 16 Bar 3 Pressure-Temperature Diagram Note Trims 1 23 2 24 / 28 3 25 / 27 3
Relation between deceleration of flow (m/s 2 ) and maximum return velocity (m/s) Deceleration of flow (m/s 2 ) Size DN Spring type 2 4 6 8 1 12 14 16 18 2 22 24 26 28 3 32 34 4 L..32.63.88 1.12 1.3 - - - - - - - - - - - S..13.32.48.63.76.89 1 1.13 1.25 1.36 - - - - - - H..7.25.37.48 6.63.69.75.8.85.89.93.97 1 5 9 5 L.2.4.69.96 1.19 1.4 - - - - - - - - - - - S..19.39 6.73.87 1.13 1.25 1.36 - - - - - - - H..13.29.41 1 9.66.72.77.82.87.91.95.99 3 7 1.11 65 L.4.41.69.94 1.15 1.34 - - - - - - - - - - - S..23.43.6.76.88 1 1.12 1.24 1.35 - - - - - - - H..14.3.41 1 8.66.72.78.84.89.95 1 6 1.12 1.17 1.23 8 L.16.48.7.87 2 1.16 1.3 - - - - - - - - - - S.9.33.65.78.9 1 1.12 1.22 1.32 - - - - - - - H.3.22.35.46 4.63.69.75.81.86.91.97 2 7 1.12 1.18 1.23 1 L.12.42.67.88 7 1.23 1.37 - - - - - - - - - - S.5.32 2.68.81.92 2 1.12 1.2 1.28 1.36 - - - - - - H..16.31.42 1 8.65.72.79.86.93 7 1.14 1.21 1.28 1.35 125 L.16.45.7.91 9 1.25 1.39 - - - - - - - - - - S.9.33 3.7.84.97 8 1.19 1.29 1.39 - - - - - - - H.2.18.33.44 3.61.69.77.84.91.98 5 1.12 1.19 1.26 1.33-15 L.22.68 2 1.35 - - - - - - - - - - - - - S.1.81 7 1.29 1.48 - - - - - - - - - - - H.3.39.63.82.98 1.1 1.22 1.31 - - - - - - - - - 2 L.19.62.98 1.26 1.48 - - - - - - - - - - - - S.9.45.75 1 1.21 1.34 - - - - - - - - - - - H..34 6.73.88.99 1.1 1.19 1.29 1.39 - - - - - - - 25 L.21.48.73.93 1.13 1.29 1.45 - - - - - - - - - - S.12.37 6.74.87 2 1.13 1.23 1.33 - - - - - - - - H.4.21.34.46 5.65.74.81.88.95 2 9 1.16 1.23 1.3 1.37-3 L.23 1.76.96 1.16 1.32 - - - - - - - - - - - S.15.39 9.76.9 4 1.16 1.27 1.38 - - - - - - - - H.7.23.36.48 7.67.76.84.91.98 5 1.12 1.19 1.26 1.33 - - L = light, S = standard, H = heavy K v values Size DN K v (m 3 /h) Zeta (-) Standard spring Light spring Heavy spring ΔP open V st ΔP open V st ΔP open V st (x1-3 bar) (m/s) (x1-3 bar) (m/s) w(x1-3 bar) (m/s) 4 26 6.6 16. 1.1 8..82 2. 2.1 5 6 2.78 12. 1.4 6. 1.1 15. 2.7 65 1 2.85 13. 1.4 6.5 1.1 16. 2.6 8 17 2.27 6.9 3.5 1.3 8.8 2.5 1 3 1.78 9. 1.2 4.5.95 1 2.2 125 477 1.72 1. 1.2 5..96 12. 2.2 15 73 2 3.7 1.6 1.9 1.4 4.6 2.5 2 142 1.27 3.2 1.6 1.3 4. 2.3 25 234 1.14 4. 2. 1.3 4.9 2.3 3 346 8 4. 2. 1.3 4.9 2.4 Low pressure tightness Fig. no Low pressure tightness (bar) 86 <.1 Notes 1. K v is the volume of water in m 3 /hr that will pass through a given valve opening at a pressure drop of 1 bar. 2. Zeta is the flow resistance factor in the relation Δρ = zèta x ½ x ρ x v 2 x1-5 in which Δρ is the pressure drop (bar) ρ is the fluid density (kg/m 3 ) v is the line velocity (m/s) 3. Δρ open is the openeningspressure of the valve (x1-3 bar). 4. V st is the steady flow velocity: this is the velocity at which the valve is just full open. 5. All data given for a horizontal pipeline. Dynamic characteristics The graphs and table show the relation between flow deceleration and maximum return velocity. The pressure surge after disc closure can be calculated Δρ = ρ x c x v r x 1-5 in which - Δρ is the pressure rise to be added to the valve downstream pressure (bar) - ρ is the density of the fluid (kg/m 3 ) - c is the speed of sound through the fluid (m/s) (for water 12 m/s) - v r is the maximum return velocity (m/s) 4
DN 4 DN 5 DN 65 DN 8 5 1 15 2 25 5 1 15 2 25 DN 1 DN 125 DN 15 DN 2 5 1 15 2 25 5 1 15 2 25 DN 25 DN 3 5 1 15 2 25 5 1 15 2 25 5
Neither Emerson, Emerson Automation Solutions, nor any of their affiliated entities assumes responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user. Keystone is a mark owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. Emerson Automation Solutions, Emerson and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective owners. The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed by our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such products at any time without notice. Emerson.com/FinalControl 6