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P1

P2

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1

PCVQ

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8

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6

DH-SMT/SI

 

VI.JA.G2.02  

©  Danfoss  11/2006

 

11 

Instructions 

Pilot-controlled PCVQ DN 100  - DN 250 (PN 16, PN 25)

Adjustment by means of a flow rate 

measuring device: 

Procedure

1.  Prior to the adjustment of the flow rate, 

start the system in accordance with the 
instructions given in section 7.4.

2.  The shut-off units 

1

 and the control units 

2

 

must be completely opened so that the flow 
rate is not restricted by a unit. 

  The adjustment can also be carried out via a 

bypass 

3

.

5.  Adjust the flow rate limitation by turning the 

adjusting throttle 

6

:

  Turning to the right 

7

, reduces the flow rate. 

3.  Unscrew cap nut 

4

.

4.  Loosen the counter nut 

5

.

  Turning to the left 

8

, increases the flow rate. 

6.  Observe the flow rate indicator.

7.  After having completed the adjustment, 

tighten the counter nut without changing the 
position of the adjusting throttle. 

8.  Re-screw the cap nut.

9.  The cap nut can be sealed.

The flow rate adjustment is completed.

Start-up

Содержание Pilot-controlled PCVQ

Страница 1: ...e Installation 4 6 5 Insulation 4 6 6 Installation Scheme 5 6 7 Assembly Drawings Dimensions 6 7 Start up 8 7 1 Required static Pressure 8 7 2 Leak and Pressure Test 8 7 3 Filling the System 8 7 4 Sta...

Страница 2: ...plates determine the use 3 Description 3 2 Mode of Operation The control unit consists of the PCV VFQ21 valve unit installed in the main pipe and AVP F installed as pilot controllers in the bypass In...

Страница 3: ...e rating plates and the PCV data sheet 5 Scope of Delivery DN 100 DN 125 Assembly kit valve unit PCV VFQ 21 Pilot controller DN 25 AVP F Throttling element Cu pipe 6 1 1500 mm Cu pipe 10 1 3000 mm DN...

Страница 4: ...ce Installation is only permitted in horizontal pipelines with the actuators hanging in a downward position The controller may be installed in the supply as well as in the return line 6 3 When install...

Страница 5: ...ring mounting Bypasscontroller PCVQ Throttling element Throttling valve Throttling valve only by DN 150 250 Valve unit PCV VFQ 21 Pilot controller AVP F DH SMT SI VI JA G2 02 Danfoss 11 2006 5 Instruc...

Страница 6: ...0 A 159 75 L1 DN 25 pipe 33 7 3 2 Material ST 35 8 not part of the delivery DN 25 SW 50 Pilot controller AVP F Throttling element 6 VI JA G2 02 Danfoss 11 2006 DH SMT SI Instructions Pilot controlled...

Страница 7: ...8 not part of the delivery DH SMT SI VI JA G2 02 Danfoss 11 2006 7 Instructions Pilot controlled PCVQ DN 100 DN 250 PN 16 PN 25 6 Assembly continuous DN 150 DN 250 Nominal diameter DN 100 125 150 200...

Страница 8: ...For higher pressures you must Remove the impulse tubes 3 at the actuator and close the connections with a stopper Prior to any leak or pressure test the instructions in section 7 3 must be complied w...

Страница 9: ...mber of rotations to the left 1 Unscrew cover 1 2 Loosen the counter nut 2 3 Choose diagram see section 7 7 Flow Adjusting Curves Observe e ecitve pressure pb 0 2 or 0 5 bar see rating plate on the ac...

Страница 10: ...N 200 kvs 450 DN 250 kvs 630 0 20 40 60 80 100 120 140 160 180 200 0 1 2 3 4 5 6 7 8 9 10 DN 200 DN 250 pb 0 2 necessary rotations of the adjustingthrottle 4 Example Ventil DN 200 required ow rate lim...

Страница 11: ...ely opened so that the ow rate is not restricted by a unit The adjustment can also be carried out via a bypass 3 5 Adjust the ow rate limitation by turning the adjusting throttle 6 Turning to the righ...

Страница 12: ...turning it to the right by means of a wrench SW5 to its stop Then unscrew valve spindle by turning it to the left by approx 10 rotations Increase of damping e g necessary in case of pressure vibration...

Страница 13: ...e Flow rate is too low Valve plug of the pilot valve AVP F does not open Valve seat or plug is dirty or damaged trim is dirty 1 Remove impulse tube 2 Dismount actuator and trim Procedure see section 9...

Страница 14: ...of the actuator 4 are not screwed to eachother Dismounting 1 Dismount impulse tubes 2 Support actuator below or by a second person as the springs 1 are pre stressed 3 Loosen union nut 2 4 Remove actu...

Страница 15: ...e stressed Secure against dropping down before unscrewing 3 Screw the stem of the actuators 4 out of the valve stem 3 by turning the actuator to the left Mounting 1 Place actuator at the valve and pus...

Страница 16: ...he Danfoss service personnel Removing the trim Valves DN 100 125 1 Dismount actuator 1 see section 9 1 2 Unscrew hexagon head cap screw 2 3 Remove bonnet 3 4 Take out trim 4 Prior to installation Clea...

Страница 17: ...ting 1 Place actuator at the valve and align observe position of the impulse tube connections 2 Screw on union nut 1 and tighten torque 100 Nm AVP F DN 25 AVP F DN 40 Dismounting 1 Unscrew actuator se...

Страница 18: ...18 VI JA G2 02 Danfoss 11 2006 DH SMT SI Instructions Pilot controlled PCVQ DN 100 DN 250 PN 16 PN 25...

Страница 19: ...DH SMT SI VI JA G2 02 Danfoss 11 2006 19 Instructions Pilot controlled PCVQ DN 100 DN 250 PN 16 PN 25...

Страница 20: ...20 VI JA G2 02 Danfoss 11 2006 DH SMT SI Instructions Pilot controlled PCVQ DN 100 DN 250 PN 16 PN 25...

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