Danfoss AB-QM 4.0 Flexo 80 mm Pressure Independent Control Valves Installation Guide

: July 26, 2024
: Danfoss

Table of Contents

Operating Guide
Installation
Insulation
Setting
Shut-off
Locking
Filter cleaning
Operation
Shut-off / Maintenance
Flushing of main pipe
Backward flushing
Forward flushing
Sizing
Measurements
Dimensions
Customer Support
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Danfoss AB-QM 4.0 Flexo 80 mm Pressure Independent Control Valves

Danfoss AB-QM 4.0 Flexo 80 mm Pressure Independent Control
Valves

Operating Guide

Operating Guide | | |
---|---|---|---
MAINTENANCE FREE| -10 … 95°C| PN 25| Δpmax. = 600kPa (6 bar)

Installation

Symbol | 27 mm
29 mm
32 mm|
---|---|---
26 mm
32 mm|

Installation

Insulation

Note:
In cooling application depending on design condition and humidity, Flexo set shall be insulated fully with vapor tight insulation.

Setting

Setting
Insulation

Shut-off

Δpmax = 10 bar

Locking

Filter cleaning

DN15| 20 mm|
---|---|---
DN20| 27 mm|

Filter cleaning

DN15

|

20 mm

|
---|---|---
DN20|

27 mm

|

Max 10 Nm (till metal touches metal

| 16, 20 mm|
---|---|---
27 mm|

Filter cleaning

Operation

Shut-off / Maintenance

Flushing of main pipe

Backward flushing

Forward flushing

Sizing

Setting| DN15 LF| DN 15| DN 15 HF| DN 20| DN 20 HF
---|---|---|---|---|---
L/h| L/s| GPM| L/h| L/s| GPM| L/h| L/s| GPM| L/h| L/s| GPM| L/h| L/s| GPM
10%| 20| 0.006| 0.09| 65| 0.018| 0.29| 120| 0.033| 0.53| 110| 0.03| 0.48| 190| 0.053| 0.84
15%| 30| 0.008| 0.13| 98| 0.027| 0.43| 180| 0.050| 0.79| 165| 0.05| 0.73| 285| 0.079| 1.25
20%| 40| 0.011| 0.18| 130| 0.036| 0.57| 240| 0.067| 1.06| 220| 0.06| 0.97| 380| 0.106| 1.67
25%| 50| 0.014| 0.22| 163| 0.045| 0.72| 300| 0.083| 1.32| 275| 0.08| 1.21| 475| 0.132| 2.09
30%| 60| 0.017| 0.26| 195| 0.054| 0.86| 360| 0.100| 1.59| 330| 0.09| 1.45| 570| 0.158| 2.51
35%| 70| 0.019| 0.31| 228| 0.063| 1.00| 420| 0.117| 1.85| 385| 0.11| 1.70| 665| 0.185| 2.93
40%| 80| 0.022| 0.35| 260| 0.072| 1.14| 480| 0.133| 2.11| 440| 0.12| 1.94| 760| 0.211| 3.35
45%| 90| 0.025| 0.40| 293| 0.081| 1.29| 540| 0.150| 2.38| 495| 0.14| 2.18| 855| 0.238| 3.76
50%| 100| 0.028| 0.44| 325| 0.090| 1.43| 600| 0.167| 2.64| 550| 0.15| 2.42| 950| 0.264| 4.18
55%| 110| 0.031| 0.48| 358| 0.099| 1.57| 660| 0.183| 2.91| 605| 0.17| 2.66| 1045| 0.290| 4.60
60%| 120| 0.033| 0.53| 390| 0.108| 1.72| 720| 0.200| 3.17| 660| 0.18| 2.91| 1140| 0.317| 5.02
65%| 130| 0.036| 0.57| 423| 0.117| 1.86| 780| 0.217| 3.43| 715| 0.20| 3.15| 1235| 0.343| 5.44
70%| 140| 0.039| 0.62| 455| 0.126| 2.00| 840| 0.233| 3.70| 770| 0.21| 3.39| 1330| 0.370| 5.86
75%| 150| 0.042| 0.66| 488| 0.135| 2.15| 900| 0.250| 3.96| 825| 0.23| 3.63| 1425| 0.396| 6.27
80%| 160| 0.044| 0.70| 520| 0.144| 2.29| 960| 0.267| 4.23| 880| 0.24| 3.87| 1520| 0.422| 6.69
85%| 170| 0.047| 0.75| 553| 0.154| 2.43| 1020| 0.283| 4.49| 935| 0.26| 4.12| 1615| 0.449| 7.11
90%| 180| 0.050| 0.79| 585| 0.163| 2.58| 1080| 0.300| 4.76| 990| 0.28| 4.36| 1710| 0.475| 7.53
95%| 190| 0.053| 0.84| 618| 0.172| 2.72| 1140| 0.317| 5.02| 1045| 0.29| 4.60| 1805| 0.502| 7.95
100%| 200| 0.056| 0.88| 650| 0.181| 2.86| 1200| 0.333| 5.28| 1100| 0.31| 4.84| 1900| 0.528| 8.37

Measurements

Dimensions

| DN15LF| DN15| DN15HF| DN20| DN20HF
---|---|---|---|---|---
A| 134.5| 144
B| 125| 138
C| 80| 80
D| 77| 77
E| 98.5| 102
F| 211| 213
G| Internal G½”| Internal G¾”
H| Internal Rp½”| Internal Rp¾”

Dimensions

| DN15LF| DN15| DN15HF| DN20| DN20HF
---|---|---|---|---|---
A| 134.5| 144
B| 134.5| 144
C| 80| 80
D| 77| 77
E| 98.5| 102
F| 211| 213
G| Internal G½”| Internal G¾”
H| Internal Rp½”| Internal Rp¾”

Dimensions

Danfoss A/S

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