Page 1
Series HLEX 4.75 - 7, HLEX 8 - 11
FIXED ORIFICE, ADJUSTABLE SUCTION PRESSURE LIMITATION
HLEX 4.75 - 7
HLEX 8 - 11
Application
Hot gas bypass valves series HLEX are used to adjust the
compressor capacity to the actual evaporator capacity in a
refrigerating plant.
The hot gas bypass valve can be installed in a bypass tube
between the hot gas line and suction line. The suction
pressure is downward limited by flowing hot gas from the high
pressure to the low pressure side.
For plants in general refrigeration and for original equipment
such as dehumidifiers, air driers, water coolers or ice-making
machines.
Materials
Body
Head
Connection tubes
brass
stainless steel, brass
copper
HOT GAS BYPASS VALVES
PRODUCT DATA
Features
• Compact design
• High performance
• Hermetic construction
• Adjustable suction pressure limitation
• Solder connections
• External pressure equalisation
• Extreme durable due to stainless steel head and
stainless steel diaphragm welded using protective gas
• Balanced port construction
• Fixed orifice
• Refrigerants: all CFC, HCFC, HFC,
not for ammonia
Specification
Nominal capacity
Adjusting range for
suction pressure limitation
Factory setting
Maximum pressure PS
Maximum test pressure PF
Max. ambient temperature
Installation
• The valves may be installed in any position.
• When soldering the valve, the valve body must not get
warmer than 100 °C.
• Remove plastic cap during soldering
• Constructive modifications at the valve are not allowed.
Adjustment
One complete revolution of the adjusting screw effects an
alternation of the suction pressure limitation by approx.
0.5 bar.
Turning clockwise = Higher suction pressure
Turning
counterclockwise
= Lower suction pressure
see table on page 2
1 - 9 bar(a)
3.7 bar(a)
29 bar(a)
32 bar(a) (simultanous on
all connections)
100 °C
Copyright © 2009 Honeywell GmbH • Subject to change without notice EN0H-1914GE23 R0709
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SERIES HLEX 4.75 - 7, HLEX 8 - 11
Capacities
Condensing
Type Orifice size
4.75
5
6
HLEX
Evaporating temperature t0: 0 °C; hot gas superheat ΔtV2oh: 25 K
7
8
10
11
temperature tc
(°C)
35
50
35
50
35
50
35
50
35
50
35
50
35
50
ΔpOffset
(bar)
0.5 0.98 1.67 1.40
0.7 1.37 2.33 1.95
0.5 1.13 1.86 1.41
0.7 1.57 2.60 1.97
0.5 1.29 2.18 1.83
0.7 1.79 3.04 2.55
0.5 1.47 2.43 1.84
0.7 2.05 3.39 2.57
0.5 1.92 3.26 2.73
0.7 2.68 4.54 3.81
0.5 2.20 3.64 2.75
0.7 3.07 5.07 3.83
0.5 2.35 3.98 3.34
0.7 3.27 5.55 4.65
0.5 2.69 4.44 3.36
0.7 3.75 6.19 4.68
0.5 2.66 4.52 3.79
0.7 3.72 6.31 5.29
0.5 3.05 5.04 3.81
0.7 4.26 7.04 5.32
0.5 3.29 5.57 4.67
0.7 4.58 7.77 6.52
0.5 3.76 6.22 4.70
0.7 5.25 8.67 6.56
0.5 4.50 7.63 6.40
0.7 6.29 10.66 8.94
0.5 5.16 8.52 6.45
0.7 7.20 11.90 9.00
Type Code / Order Information
Bypass-capacity QN (kW)
R134a R407C R404A
HLEX 5 12 mm x 16 mm
Series
Orifice size
Solder connections ODF
(inlet x outlet)
EN0H-1914GE23 R0709 2 Honeywell GmbH • Subject to change without notice
Page 3
Dimensions and Weights
SERIES HLEX 4.75 – 7, HLEX 8 - 11
Type
HLEX
Orifice
size
4.75
5
6
7
8
10
11
Connections Dimensions (mm)
Inlet
(A)
12 mm ODF 16 mm ODF 6 mm ODF
1/2‘‘ODF 5/8‘‘ODF 1/4‘‘ODF
16 mm ODF 22 mm ODF 6 mm ODF
5/8‘‘ODF 7/8‘‘ODF 1/4‘‘ODF
Outlet
(B)
Pressure
equalizer (C)
Weight
D E
53 53 approx. 0.9
57 65 approx. 1.3
(kg)
HLEX 4.75 - 7
Honeywell GmbH • Subject to change without notice 3 EN0H-1914GE23 R0709
HLEX 8 - 11
Page 4
SERIES HLEX 4.75 - 7, HLEX 8 - 11
Application Samples
Fig. 1: hot gas bypass in the suction line
Fig. 2: hot gas bypass in the evaporator inlet
Automation and Control Solutions
Honeywell GmbH
Hardhofweg
74821 Mosbach/Germany
Phone: +49 (0)
Fax: +49 (0)
62 61 / 81-475
62 61 / 81-461
E-Mail: cooling.mosbach@honeywell.com
KAT-HLEX-002
www.honeywell-cooling.com
EN0H-1914GE23 R0709 4 Honeywell GmbH • Subject to change without notice
Manufactured for and on behalf of the
Environment and Combustion Controls
Division of Honeywell Technologies Sàrl,
1180 Rolle, Z. A. La Pièce 16, Switzerland
by its authorized representative Honeywell GmbH
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