Flow-rate curves for diaphragm valves Type 2730 plastic, 2731 forged, 2731 cast, 2731 GP cold formed pipe valve body
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1 Flow-rate curves for diaphragm valves Page 1/12
2 In this documentation fl ow characteristics for the Bürkert diaphragm valves 273 and 2731 are given. These characteristics were determined with a pressure of 3 bar at the valve entrance and a pressure drop of 1 bar. With other operating conditions the curves can deviate easily from the stated values. Reason is due to the elasticity and the grouting of the diaphragms. Therefore the curves serve only as a guideline for the rating of regulating valves. Page 2/12
3 DN15 C body () Forged body (VS) Cast body (VG) (-ISO) Stroke EPDM PTFE EPDM PTFE EPDM PTFE EPDM PTFE [%] Kv value Kv value Kv value Kv value [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] Actuator size F-mm - DN VS 3 1 VG Page 3/12
4 DN C body () Forged body (VS) Cast body (VG) ( ISO) Stroke EPDM PTFE EPDM PTFE EPDM PTFE EPDM PTFE [%] Kv value Kv value Kv value Kv value [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] Actuator size F-mm - DN VS 3 1 VG Page 4/12
5 DN25 C body () Forged body (VS) Cast body (VG) ( ISO) Stroke EPDM PTFE EPDM PTFE EPDM PTFE EPDM PTFE [%] Kv value Kv value Kv value Kv value [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] Actuator size F-mm - DN VS VG Page 5/12
6 DN32 C body () ( ISO) Stroke EPDM PTFE EPDM PTFE [%] Kv value Kv value [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] Actuator size G-mm - DN Page 6/12
7 DN C body () Forged body (VS) Cast body (VG) ( ISO) Stroke EPDM PTFE EPDM PTFE EPDM PTFE EPDM PTFE [%] Kv value Kv value Kv value Kv value [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] Actuator size H-125mm - DN VS VG Page 7/12
8 DN5 C body () Forged body (VS) Cast body (VG) ( ISO) Stroke EPDM PTFE EPDM PTFE EPDM PTFE EPDM PTFE [%] Kv value Kv value Kv value Kv value [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] [m³/h] [%] Actuator size H-125mm - DN VS VG Page 8/12
9 DN65 C body () ( ISO) Stroke EPDM EPDM [%] Kv value Kv value [m³/h] [%] [m³/h] [%] Actuator size K-175mm - DN Page 9/12
10 DN C body () ( ISO) Stroke EPDM EPDM [%] Kv value Kv value [m³/h] [%] [m³/h] [%] Actuator size K-175mm oder L-225mm - DN Page 1/12
11 DN C body () ( ISO) Stroke EPDM EPDM [%] Kv value Kv value [m³/h] [%] [m³/h] [%] Actuator size L-225mm - DN Page 11/12
12 Please note This is an "on-line" formular, i.e. you can fill out the formular directly in the pdf document before you print it out Please fill out and send to your nearest Bürkert facility* with your inquiry or order Company Customer No Address Postcode/Town Contact person Department Tel./Fax = mandatory fields to fill out Quantity Required delivery date Operating data Site of control Measuring and control task Pipeline Pipe material Process medium Type of media Flow rate (Q, QN, W) 1) Temperature at valve inlet T1 Absolute pressure at valve inlet P1 Absolute pressure at valve outlet P2 DN PN Liquid Steam Gas Min Standard Max unit Steam pressure Pv Kinematic viscosity (ν) Dynamic viscosity (η) Standard density Max. sound level accepted Valve features mm 2 /s or cst mpa.s or cp Kg/m 3 DB (A) 1) standard unit Liquid Q = m 3 /h; Steam W = Kg/h; Gas QN = Nm 3 /h Control valve type Body material Surface finish 2) Seat sealing material Nominal pressure Nominal size Type of connection Standard connection Function Pilot pressure 2) Only diaphragm valve PN DN Globe Angle seat Diaphragm Ball Valve Butterfl y Other Stainless steel C PP DF Other internal external Metal PTFE EPDM 2) FPM 2) Flange Socket union Welded Int. thread Ext. thread Tri-Clamp ISO DIN ANSI JIS Other NC NO Double-acting min. max. Positioner / Controller Type wire Type wire Type wire Valve mounted Remote version Power supply 24 VDC Communication Setpoint/output analog signal Positioner version Input /4 - ma / -1 V Output 4 - ma or Binary PID Controller version 3) Input measuring signal 4 - ma Power supply 24 VDC Communication Setpoint/output analog signal or via BUS Profibus DP Device Net Positioner version Input /4 - ma / -5/1 V Output 4 - ma or/and Binary PID Controller version 3) Input measuring signal 4 - ma / Pt / Frequency Standard EEx ia Power supply 24 VDC via setpoint or BUS Communication Setpoint/output analog signal or via BUS Profibus PA Hart Positioner version Input 4 - ma Output 4 - ma or/and Binary PID Controller version 3) Input measuring signal 4 - ma 3) same setpoint for Input and Output signal as for Positioner version Inductive proximity switch 1 2 Inductive proximity switch 1 2 *To find your nearest Burkert facility, click on the orange box In case of special application conditions, We reserve the right to make technical changes 59/1_EU-en_ please consult for advice. without notice.
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