Pressure relief controller for oil V22D28 (PN 16, 25)
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1 Data sheet Pressure relief controller for oil V22D28 (PN 16, 25) Description The controller has a control valve, an actuator with one control diaphragm and a spring for pressure setting. Features: - safe and reliable operation - pressure relieved valves - maintenance free - self acting - high control accuracy - without external impulse tubes V22D28 is a self-acting pressure relief controller primarily for use in oil applications such as light and heavy oil, fuel oil and especially high viscosity media. In case of heavy oil there is no need to heat it with steam. It can be used for maintaning pressure in heating and cooling plants. Main data: DN k VS m 3 /h PN 16, 25 Setting range: bar/1-5 bar/3-11 bar/10-16 bar/12-20 bar Temperature: - Light/heavy/fuel oil/high viscosity media: C Connections: - Flange The controller is normally closed and opens on rising pressure. Ordering Example: Pressure relief controller for oil, DN 15, k VS 3.6, PN 16, 1-5 bar, t max 140 C, flange. - 1 V22D28 DN 15 controller Code no: The controller will be delivered completely assembled. V22D28 PN 16 Controller Picture DN (mm) k VS (m 3 /h) Connection Flanges acc. to EN V22D28 PN 16 Controller Picture DN (mm) k VS (m 3 /h) Connection Flanges acc. to EN DH-SMT/SI VD.CC.N3.02 Danfoss 05/2010 1
2 Ordering (continuous) V22D28 PN 25 Controller Picture DN (mm) k VS (m 3 /h) Connection Flanges acc. to EN Service kits Picture Type designation Valve V22 Type designation Actuator D28 oil DN (mm) k VS (m 3 /h) Connection Flanges acc. to EN PN Size (cm 2 ) G G G G1602 Technical data Valve Nominal diameter DN k vs value m 3 /h Nominal flow Nominal pressure PN 25 Max. differential pressure bar 16 Medium Light/heavy/fuel oil/high viscosius media Medium ph Min 7/max 10 Medium temperature C Connections Flange Materials Valve body EN-GJS LT (GGG 40.3) Valve seat Stainless steel (1.4104) Valve cone Stainless steel (1.4104) Sealing Metal Actuator Actuator size cm yellow Diff. pressure setting silver ranges and spring bar colours black black/blue Nominal pressure PN Materials Housing Steel, mat. No , chromated EN-GJS LT (GGG 40.3) Steel, mat. No , chromated Diaphragm (rolling) / bellows FKM FKM 2 VD.CC.N3.02 Danfoss 05/2010 DH-SMT/SI
3 Application principle Installation positions Controller can be installed in horizontal pipes only with a pressure actuator oriented upwards. This installation position enables the transfer of media temperature to the actuator. Pressure temperature diagram PN 16 EN-GJS LT (GGG 40.3) working area PN 25 working area EN-GJS LT (GGG 40.3) DH-SMT/SI VD.CC.N3.02 Danfoss 05/2010 3
4 Design PN Valve body 2. Valve seat 3. Valve cone 4. Valve stem 5. Union nut 6. Actuator stem 7. Diaphragm plate 8. Rolling diaphragm 9. Larger diaphragm plate 10. Diaphragm housing 11. Setting spring 12. Nut for setpoint adjustment PN Valve body 2. Valve seat 3. Valve cone 4. Valve stem 5. Union nut 6. Actuator stem 7. Spring support plate 8. Bellow 9. Cover plate 10. Bellows housing 11. Setting spring 12. Spindle for setpoint adjustment V22D28-PN 16 V22D28-PN 25 Function The pressure in front of the control valve is being internally transferred to the actuator chamber and act on control diaphragm. On the other side of the diaphragm atmospheric pressure is acting. Control valve is normally closed. It opens on rising pressure and closes on falling pressure to maintain constant pressure before the control valve. Settings Pressure setting Pressure setting is being done by the adjustment of the setting spring for pressure control. The adjustment can be performed on the basis of pressure indicator. 4 VD.CC.N3.02 Danfoss 05/2010 DH-SMT/SI
5 Dimensions Ø 195 Ø 172 Ø 172 H H 1 H 2 = (DN 15-65) = (DN 15-40) L = (DN 20) = (DN 15-65) L = (DN 15-50) L DN L H mm H H DH-SMT/SI VD.CC.N3.02 Danfoss 05/2010 5
6 6 VD.CC.N3.02 Danfoss 05/2010 DH-SMT/SI
7 DH-SMT/SI VD.CC.N3.02 Danfoss 05/2010 7
8 8 VD.CC.N3.02 Produced by Danfoss A/S 05/2010
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