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	Thread Type Thread Type	Show

	Thread Type Thread Type	Hide

BSPP

	System of Measurement System of Measurement

Inch

	Thread Size Thread Size

	Dash Size Dash Size

	Gender Gender

Male

	Valve Type Valve Type

Check

	For Use With For Use With

Hydraulic Fluid

	Connection Connection

Inlet

Outlet

	Body Material Body Material

Steel

	Minimum Opening Pressure Minimum Opening Pressure

5 psi

	Hex Width Hex Width

	Maximum Pressure Maximum Pressure

5,000 psi

	Return Actuation Return Actuation

Spring

	Seal Material Seal Material

Rubber

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Flow Coefficient (Cv) Flow Coefficient (Cv)

Not Rated

	Number of Ports Number of Ports

	Port-to-Port Length Port-to-Port Length

	Minimum Temperature Minimum Temperature

-49° to 0° F

	Actuation Actuation

Pressure

	Total Number of Ports Total Number of Ports

	Check Valve Type Check Valve Type

Poppet

	Mounting Orientation Mounting Orientation

12 Products

Backflow-Prevention Inline Hydraulic Valves

Also known as check valves, these open to allow flow in one direction and close when flow stops or reverses.

Valves with a poppet have internal components that can handle any flow rates. The higher the flow rate of the hydraulic fluid coming into the valve, the lower the pressure the fluid is as it leaves the valve.

UN/UNF (SAE) thread connections have straight threads and are also known as O-ring Boss fittings.

UN/UNF (ORFS) threads are also known as O-ring face seal threads.

For technical drawings and 3-D models, click on a part number.

UN/UNF (SAE) Male Inlet × UN/UNF (ORFS) Male Outlet—Poppet Check Valve

UN/UNF (SAE)
— UN/UNF
(ORFS)

Inlet Connection		Outlet Connection
Thread Size	Dash Size	Thread Size	Dash Size	Max. Flow Rate	Flow Coefficient (Cv)	Max. Pressure, psi	Min. Opening Pressure, psi	Seal Material	Port-to-Port Lg.	Hex Wd.	Mounting Orientation	Temp. Range, °F		Each
Steel Body
7/16"-20	04	9/16"-18	04	Not Rated	Not Rated	5,000	5	Buna-N Rubber	1 1/8"	5/8"	Any Position	-40° to 250°	0000000	000000
9/16"-18	06	11/16"-16	06	Not Rated	Not Rated	5,000	5	Buna-N Rubber	1 1/8"	3/4"	Any Position	-40° to 250°	0000000	00000
3/4"-16	08	13/16"-16	08	Not Rated	Not Rated	5,000	5	Buna-N Rubber	1 3/8"	7/8"	Any Position	-40° to 250°	0000000	000000
7/8"-14	10	1"-14	10	Not Rated	Not Rated	5,000	5	Buna-N Rubber	1 5/8"	1 1/8"	Any Position	-40° to 250°	0000000	000000
1 1/16"-12	12	1 3/16"-12	12	Not Rated	Not Rated	5,000	5	Buna-N Rubber	1 7/8"	1 1/4"	Any Position	-40° to 250°	0000000	000000
1 5/16"-12	16	1 7/16"-12	16	Not Rated	Not Rated	5,000	5	Buna-N Rubber	2"	1 1/2"	Any Position	-40° to 250°	0000000	000000

UN/UNF (ORFS) Male Inlet × UN/UNF (SAE) Male Outlet—Poppet Check Valve

UN/UNF
(ORFS) —
UN/UNF (SAE)

Inlet Connection		Outlet Connection
Thread Size	Dash Size	Thread Size	Dash Size	Max. Flow Rate	Flow Coefficient (Cv)	Max. Pressure, psi	Min. Opening Pressure, psi	Seal Material	Port-to-Port Lg.	Hex Wd.	Mounting Orientation	Temp. Range, °F		Each
Steel Body
9/16"-18	04	7/16"-20	04	Not Rated	Not Rated	5,000	5	Buna-N Rubber	1 1/8"	5/8"	Any Position	-40° to 250°	0000000	000000
11/16"-16	06	9/16"-18	06	Not Rated	Not Rated	5,000	5	Buna-N Rubber	1 1/8"	3/4"	Any Position	-40° to 250°	0000000	00000
13/16"-16	08	3/4"-16	08	Not Rated	Not Rated	5,000	5	Buna-N Rubber	1 3/8"	7/8"	Any Position	-40° to 250°	0000000	000000
1"-14	10	7/8"-14	10	Not Rated	Not Rated	5,000	5	Buna-N Rubber	1 5/8"	1 1/8"	Any Position	-40° to 250°	0000000	000000
1 3/16"-12	12	1 1/16"-12	12	Not Rated	Not Rated	5,000	5	Buna-N Rubber	1 7/8"	1 1/4"	Any Position	-40° to 250°	0000000	000000
1 7/16"-12	16	1 5/16"-12	16	Not Rated	Not Rated	5,000	5	Buna-N Rubber	2"	1 1/2"	Any Position	-40° to 250°	0000000	000000