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Shut Off Valves - Emerson Flow Controls

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ACK Check Valves

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The ACK check valve is a normally closed magnetic check valve that prevents reverse refrigerant flow in liquid lines and compressor discharge lines.

Features

• Copper Connection Sizes 1/4" through 2-5/8"

• Hermetic Spun Copper Design

• Near Zero Internal Leak Rate

• Magnetic Checking Action

• Built-In 30 Mesh Stainless Steel Strainer

• Can Be Installed In Any Position

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Specifications

• UL/CUL File number: SA 5312

Dimensional Data

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	ACK	4
	Check Valve Series	Copper ODF Connection Size (in 1/16")

Nomenclature example: ACK-4

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Ordering Information and Dimensional Data (in)

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	PCN	Description	Connection Size	A	B	C	D	Opening Pressure (oz/sq in)	Opening Pressure (psig)	MWP (psig)	Burst Pressure (psig)	Leak Rate CIM @ 60 psi	Nominal Tons R-22 Suction 40°F @ 1 psi	Nominal Tons R-22 Liquid 40°F @ 1 psi	Cv
	064985	ACK-4	1/4 ODF	4.00	0.88	0.254 ± 0.002	0.19	1.20	0.80	800	4000	0.015	0.40	2.60	0.9
	064986	ACK-6	3/8 ODF	4.00	0.88	0.379 ± 0.002	0.40	1.30	0.08	800	4000	0.015	0.60	3.10	1.0
	064987	ACK-8	1/2 ODF	5.00	1.13	0.504 ± 0.002	0.31	3.50	0.22	640	3400	0.034	1.20	9.40	3.1
	064988	ACK-10	5/8 ODF	5.00	1.13	0.629 ± 0.002	0.50	3.50	0.22	640	3400	0.034	1.40	13	3.6
	064989	ACK-12	3/4 ODF	7.00	1.63	0.754 ± 0.002	0.63	3.80	0.24	560	2800	0.074	3.30	27	8.0
	064990	ACK-14	7/8 ODF	7.00	1.63	0.879 ± 0.003	0.42	3.80	0.24	560	2800	0.074	3.70	29	9.2
	064991	ACK-18	1-1/8 ODF	8.38	2.13	1.130 ± 0.003	0.94	6.80	0.43	400	2000	0.122	6	51	15.4
	064992	ACK-22	1-3/8 ODF	9.38	2.63	1.380 ± 0.003	1.04	10.20	0.64	440	2200	0.172	9.50	79	23.8
	064993	ACK-26	1-5/8 ODF	10.50	3.13	1.630 ± 0.003	1.07	11.40	0.71	420	2100	0.272	17	102	24.2
	064994	ACK-34	2-1/8 ODF	12.00	3.63	2.130 ± 0.003	1.34	18.10	1.13	400	2000	0.386	30	213	38.7
	064995	ACK-42	2-5/8 ODF	13.00	4.13	2.630 ± 0.003	1.50	23.00	1.44	380	1900	0.512	50	375	71.7

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Cross Reference (Identical Lay-In)


	Emerson	A-1 Components	Superior
	ACK-4	MS-4	900M-4S
	ACK-6	MS-6	900M-6S
	ACK-8	MS-8	900M-8S
	ACK-10	MS-10	900M-10S
	ACK-12	MS-12	900M-12S
	ACK-14	MS-14	900M-14S
	ACK-18	MS-18	N/A
	ACK-22	MS-22	N/A
	ACK-26	MS-26	N/A
	ACK-34	MS-34	N/A
	ACK-42	MS-42	N/A

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