Danfoss REP24CO3 Spezifikationen PDF herunterladen (Seite 44)

44

The ABQM is a PIBCV (Pressure

Independent Balancing and Control

Valve) which combines the beneﬁts of a

control valve and a diﬀerential pressure

controller, which work in tandem to

provide the ultimate in system control

and setting accuracy. The diﬀerential

pressure controller within the valve

keeps a constant diﬀerential pressure

across the valve cone, meaning that

changes in system pressure do not

aﬀect the control characteristics of the

valve.

Setting the valve is simple – all you

need to know is the required ﬂow

through the valve, and the max ﬂow of

the valve. With these two ﬁgures you

just divide one by the other to establish

the correct setting for the valve e.g.

Design ﬂow (270l/h) / Valve max ﬂow

(450l/h) x 100 = 60% setting on the

dial. Diﬀerent sizes of ABQMs cover a

range of maximum ﬂows, enabling the

right size valve for the application to be

selected easily. The maximal ﬂow speeds

of ABQM corresponds with the maximal

ﬂow speed through pipe dimensions

according to international standards.

With a standard M30x1.5 connection

the ABQM is suitable for a range of

actuators providing control solutions

for 0-10v, 3point and on/oﬀ control.

The ABQM is perfect for any application

where eliminating overﬂow situations

or accurate control valve characteristics

are needed. The addition of optional test

points on all models means that ﬂow

veriﬁcation and pump optimization is a

simple task.

Reduction of cost in an installation,

both in terms of materials and

installation/commissioning is a key

objective. The combined functionality

of the ABQM means that it replaces

the need for a 2-way control valve and

manual balancing valve, reducing initial

costs. When this saving is added to the

installation and commissioning savings,

the ABQM becomes the obvious choice

for any installation requiring automatic

ﬂow control or control valves.

ABQM

How does it work?

The images below demonstrate the operation of the ABQM in principle.

Flow is controlled

through the diﬀerential

controller (grey) and the

control side (gold) of

the valve.

As diﬀerential pressure

increases across the

valve, the membrane

is immediately pushed

down, closing the pressure

controller.

If the diﬀerential pressure

decreases, the membrane

instantly adapts and

moves up and opens

the pressure controller

– keeping a constant

diﬀerential pressure

through the control side of

the valve.

ABQM DN

Q

max

(l/h)

With measuring points

ABQM

Without measuring points

External

Thread

Code No.

External

Thread

Code No.

10

LF

150

G ½ A

003Z026100

G ½ A

003Z025100

10 275 003Z021100 003Z020100

15

LF

275

G ¾ A

003Z026200

G ¾ A

003Z025200

15 450 003Z021200 003Z020200

20 900 G 1 A 003Z021300 G 1 A 003Z020300

25 1,700 G 1¼ A 003Z021400 G 1¼ A 003Z020400

32 3,200 G 1½ A 003Z021500 G 1½ A 003Z020500

40 7,500 G 2 S 003Z070000

ABQM (DN 10-32) can not be upgraded to ABQM

with nipples.

50 12,500 G 2½ A 003Z071000

DN

Q

max

(l/h)

Flange

Connec-

tion

Code No.

50 12,500

PN 16

003Z071100

65 20,000 003Z070200

80 28,000 003Z070300

100 38,000 003Z070400

125 90,000 003Z070500

150 145,000 003Z070600

200 190,000 003Z070700

250 280,000 003Z070800

LargeABQMplusAMEABQMplusTWA-Z

Pressure Independent Balancing and Control Valve

ABQM

LargeABQMplusAME

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