ACK

ACK
Emerson™ ACK check valve
For all commercial AC and refrigeration applications
Product overview
Applications
• Magnetic checking action
• Compressor discharge lines
• Hermetic construction
• 1/4” through 2-5/8” connections
• Built-in 30 mesh stainless steel strainer
• UL/CUL Approved (File # SA 5312)
• Can be installed in any position
• Installs with hard or soft solder
• Drop-in dimensions for competitive models
– Prevents flow from condenser to compressor
during off-cycle
– Prevents flow from operating compressor to
idled compressor
• Liquid lines
– Prevents reverse flow through unused metering
device on heat pump
– Prevents backup in low pressure line of
recirculating system during defrost
Feature
Function
Benefit
Hermetic design
Provides a permanent seal
Will not leak
100% copper construction
Improves system connection
Easier brazability
Identical lay-in to competition
Simplifies system installation
Interchangeability
30 mesh stainless steel inlet screen
Captures system debris
Seat surface protection
Magnetic actuation
Closes valve securely
Operational in any position
Ordering information
PCN
Description
Connection
Size
A
(in.)
B
(in.)
C
(in.)
D
(in.)
Opening
Pressure
(oz./sq. in.)
MWP
(psig)
064985
ACK-4
1/4 ODF
4
7/8
.254 ± .002
0.19
1.2
800
0.4
2.6
064986
ACK-6
3/8 ODF
4
7/8
.379 ± .002
0.40
1.3
800
0.6
3.1
064987
ACK-8
1/2 ODF
5
1-1/8
.504 ± .002
0.31
3.5
680
1.2
9.4
064988
ACK-10
5/8 ODF
5
1-1/8
.629 ± .002
0.50
3.5
680
1.4
13
064989
ACK-12
3/4 ODF
7
1-5/8
.754 ± .002
0.63
3.8
680
3.3
27
064990
ACK-14
7/8 ODF
7
1-5/8
.879 ± .003
0.75
3.8
680
3.7
29
064991
ACK-18
1-1/8 ODF
8-3/8
2-1/8
1.130 ± .003
0.94
6.8
680
6.0
51
064992
ACK-22
1-3/8 ODF
9-3/8
2-5/8
1.380 ± .003
1.04
10.2
680
9.5
79
064993
ACK-26
1-5/8 ODF
10-1/2
3-1/8
1.630 ± .003
1.07
11.4
680
17.0
102
064994
ACK-34
2-1/8 ODF
12
3-5/8
2.130 ± .003
1.34
18.1
680
30.0
213
064995
ACK-42
2-5/8 ODF
13
4-1/8
2.630 ± .003
1.50
23.0
680
50.0
375
Dimensional drawing
Nomenclature
A
CK
4
Series
Check valve
Copper ODF connection size
EmersonClimate.com
2003FC-104 R2 (2/13) Emerson is a trademark of Emerson Electric Co. ©2013 Emerson Climate Technologies, Inc. All rights reserved. Printed in the USA.
Nominal Tons Nominal Tons
R-22 Suction
R-22 Liquid
40°F @ 1 psi
40°F @ 1 psi
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