Inert Gas Pumps | McMaster-Carr

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

View catalog pages (8)

Forward

How can we improve?

43 Products

About Vacuum Pumps

Since these pumps don't require lubrication, there’s no risk of oil contamination. Maximum flow rate is the rate at which air is pumped before a vacuum is created. Flow rate steadily decreases as the pump generates the vacuum. The larger the tank, the longer it will take to form a vacuum.

Style A pumps are often used for air and gas sampling, controlling compressed air flow, and vacuum filtration. They are also suitable for pressure applications up to 18 psi

Repair kits include a replacement diaphragm.

120V AC, Single Phase—With Thermal Overload Protection

								Intake		Discharge		O'all
Style	Max. Vacuum, in. of Hg	Max. Flow Rate, cfm	Max. Pressure, psi	Temp. Range, °F	Volume, dB	Horsepower	Current, A	Connection Style	For Tube ID	Connection Style	For Tube ID	Lg.	Wd.	Ht.		Each
NEMA 5-15 Plug
A	20	0.6	18	35° to 100°	72	1/45 hp	1.2	Barbed	3/8"	Barbed	3/8"	7 1/4"	4"	5 1/2"	00000000	0000000

Repair Kit for Style A

00000000

Each

000000

Electric Vacuum Pumps


	NEMA 5-15
	NEMA 6-15

Use these pumps in applications such as degassing and servicing refrigeration and freezer systems. Maximum flow rate is the rate at which air is pumped before a vacuum is created. Flow rate steadily decreases as the pump generates the vacuum. The larger the tank, the longer it will take to form a vacuum. Tube and fitting ID will also affect flow.

						Intake			Discharge			Overall
Max. Vacuum	Max. Flow Rate, cfm	Temp. Range, °F	Volume, dB	Horsepower	Current, A	Port Size	Tube Connection Type	Gender	Pipe Size	Thread Type	Gender	Lg.	Wd.	Ht.	Oil Capacity, oz.		Each
115V AC, Single Phase—With Thermal Overload Protection
NEMA 5-15 Plug
1.5×10 ^-2 torr @ 72° F	3	30° to 180°	70	1/2 hp	7	1/4", 3/8", 1/2"	Flared	Male	1/2	NPT	Male	14 1/2"	5 5/8"	12"	27	0000000	0000000
1.5×10 ^-2 torr @ 72° F	5	30° to 180°	70	1/2 hp	7	1/4", 3/8", 1/2"	Flared	Male	1/2	NPT	Male	14 1/2"	5 5/8"	12"	21	0000000	000000
1.5×10 ^-2 torr @ 72° F	7	30° to 180°	70	1/2 hp	7	1/4", 3/8", 1/2"	Flared	Male	1/2	NPT	Male	14 1/2"	5 5/8"	12"	23	0000000	000000
1.5×10 ^-2 torr @ 72° F	10	30° to 180°	70	1/2 hp	7	1/4", 3/8", 1/2"	Flared	Male	1/2	NPT	Male	14 1/2"	5 5/8"	12"	26	0000000	000000
115V AC/230V AC, Single Phase—With Thermal Overload Protection
NEMA 6-15 Plug
1.5×10 ^-2 torr @ 72° F	3	30° to 180°	70	1/2 hp	3.5/7	1/4", 3/8", 1/2"	Flared	Male	1/2	NPT	Male	14 1/2"	5 5/8"	12"	27	0000000	000000
1.5×10 ^-2 torr @ 72° F	5	30° to 180°	70	1/2 hp	3.5/7	1/4", 3/8", 1/2"	Flared	Male	1/2	NPT	Male	14 1/2"	5 5/8"	12"	21	0000000	000000
1.5×10 ^-2 torr @ 72° F	7	30° to 180°	70	1/2 hp	3.5/7	1/4", 3/8", 1/2"	Flared	Male	1/2	NPT	Male	14 1/2"	5 5/8"	12"	21	0000000	000000
1.5×10 ^-2 torr @ 72° F	10	30° to 180°	70	1/2 hp	3.5/7	1/4", 3/8", 1/2"	Flared	Male	1/2	NPT	Male	16"	5 5/8"	12"	26	0000000	000000

Electric High-Vacuum Pumps

Barbed Intake Connection

Achieve powerful vacuum and continuous flow for applications such as vacuum drying, solvent evaporation, and distillation. Maximum flow rate is the rate at which air is pumped before a vacuum is created. Flow rate steadily decreases as the pump generates the vacuum. The larger the tank, the longer it will take to form a vacuum. Tube and fitting ID will also affect flow.

						Intake				Overall
Max. Vacuum	Max. Flow Rate, cfm	Temp. Range, °F	Volume, dB	Horsepower	Current, A	Connection Style	Gender	For Tube ID	Discharge Connection Style	Lg.	Wd.	Ht.	Oil Capacity, qt.		Each
120V AC, Single Phase—Without Thermal Overload Protection
NEMA 5-15 Plug
10 ^-4 torr @ 72° F	0.9	50° to 100°	54	1/3 hp	5	Barbed	Male	7/16"	Open Outlet	17 7/8"	9"	12 5/8"	0.63	0000000	000000000
10 ^-4 torr @ 72° F	3.2	50° to 100°	54	1/2 hp	7	Barbed	Male	7/16"	Open Outlet	20"	12"	15"	2.25	0000000	00000000
10 ^-4 torr @ 72° F	5.6	50° to 100°	54	1/2 hp	7	Barbed	Male	13/16"	Open Outlet	20"	12"	15"	2.25	0000000	00000000

Robot-Arm-Mounted Electric Vacuum Pumps

Generate the suction you need to power end-of-arm tools, such as vacuum cups and grippers, without using an installed vacuum system. These pumps, also known as venturi devices, connect to any compressed air source and come with all the electrical connections you need to start lifting or moving objects. They’re curved and have a foam mounting pad that fits collaborative robot arms. Use the hook-and-loop straps to secure them in place—close to your tools, but out of the way.

These pumps have a vacuum switch that uses analog and PNP digital feedback to send information about the pump’s vacuum level to your controller. The switch has an LED display that shows the vacuum setting and status. Push buttons on the pump let you set and change the vacuum setting. An integrated solenoid valve controls the air flow to your tools.

Vacuum pumps with a discharge tube have an additional integrated solenoid valve that creates a burst of air for removing parts that may not drop when the air flow stops, such as those with adhesive on them.

Vacuum pumps with 90° elbow M8 plug will work with FANUC CRX and Universal Robots models. They include a USB flash drive with software for Universal Robots, called URCap, that plugs into your teach pendant to program the pump.

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

Vacuum Pumps

Vacuum Pump with Wire Leads

LED Display

Vacuum Pump with 90° Elbow M8 Plug

						Intake, Push to Connect		Vacuum Connection, Push to Connect		O'all
Max. Vacuum	Max. Flow Rate, cfm	Operating Pressure, psi	Temp. Range, °F	Volume, dBA	Current, A	Tube OD, mm	Gender	Tube OD, mm	Gender	Lg.	Ht.	For Robot Arm Manufacturer (Series/Model No.)		Each
24V DC, Single Phase
With Wire Leads
27 in. of Hg @ 72° F	5	120	0° to 120°	70	0.2	6	Female	6	Female	4 3/8"	5 5/8"	__	0000000	0000000
With 90° Elbow M8 Plug
27 in. of Hg @ 72° F	5	120	0° to 120°	70	0.2	6	Female	6	Female	4 3/8"	5 5/8"	FANUC (CRX 10iA, 10iA/L) Universal Robots (UR3; UR3e; UR5; UR5e; UR10; UR10e; UR16; UR16e)	0000000	000000

Vacuum Pumps with Discharge Tube

Vacuum Pump with Discharge Tube and Wire Leads

LED Display

Vacuum Pump with Discharge Tube and 90° Elbow M8 Plug

						Intake, Push to Connect		Discharge, Push to Connect		Vacuum Connection, Push to Connect		O'all
Max. Vacuum	Max. Flow Rate, cfm	Operating Pressure, psi	Temp. Range, °F	Volume, dBA	Current, A	Tube OD, mm	Gender	Tube OD, mm	Gender	Tube OD, mm	Gender	Lg.	Ht.	For Robot Arm Manufacturer (Series/Model No.)		Each
24V DC, Single Phase
With Wire Leads
18 in. of Hg @ 72° F	5	120	0° to 120°	74	0.2	6	Female	6	Female	10	Female	4 3/8"	7"	__	0000000	0000000
With 90° Elbow M8 Plug
18 in. of Hg @ 72° F	5	120	0° to 120°	74	0.2	6	Female	6	Female	10	Female	4 3/8"	7"	FANUC (CRX 10iA, 10iA/L) Universal Robots (UR3; UR3e; UR5; UR5e; UR10; UR10e; UR16; UR16e)	0000000	000000

Electric Ultra-High-Vacuum Pumps

Achieve vacuum levels up to 1 x 10 ^-12 torr with these ultra-high-vacuum pumps. Each unit includes two pumps—a diaphragm pump and a turbomolecular pump—that work together to create extremely high levels of vacuum in your chamber. The turbomolecular pump meets IP54 for protection in damp and dusty environments. Units are compact, so they fit on top of a workbench or table.

Pumps are ready to use as soon as they’re plugged in and connected to a chamber. Since they don’t use oil, they won’t introduce contaminants into your system. They hardly vibrate, minimizing interference with sensitive instruments and measurement devices.

Pumps with claw-clamp intake connections require a ring and four double-claw clamps (all sold separately) to connect to other components. Claw-clamp connections are also known as ISO-K fittings. These pumps include a gauge with quick-clamp connections, which requires a quick clamp and a ring (both sold separately) to connect. Quick-clamp connections are also known as KF fittings.

Pumps with flanged intake connections and the included gauge each require a gasket (sold separately) to connect to your chamber. Flanged connections are also known as CF fittings.

Pumps with Thermal Overload Protection—Three-Prong Plug

				Intake Connection				Gauge Port Connection				Discharge Connection (BSPP Threads)		O'all
Max. Vacuum	Max. Flow Rate, cfm	Volume, dB	Current, A	For Tube OD	Flange OD	Trade Number	High Vacuum Connection Type	For Tube OD	Flange OD	Trade Number	High Vacuum Connection Type	Pipe Size	Gender	Ht.	Wd.		Each
Claw-Clamp Intake Connection—120V AC/240V AC, Single Phase
1 × 10 ^-8 torr @ 72° F	142	50	4.6	2 1/2"	3 3/4"	63	ISO-K	1"	1.57"	25	ISO-KF	1/8	Male	12 1/8"	11 7/8"	000000	000000000
Flanged Intake Connection—120V AC/240V AC, Single Phase
1 × 10 ^-12 torr @ 72° F	142	50	4.6	2 1/2"	4 1/2"	63	CF	1 1/2"	2 3/4"	40	CF	1/8	Male	13 7/8"	11 7/8"	000000	00000000

Clamps for Pumps with Claw-Clamp Intake Connection

Double-Claw Clamp

Clamp with Wing Nut

For Claw-Clamp Intake Connection—Double-Claw with Bolt
For Tube OD	For Flange OD	Trade Number	High Vacuum Connection Type	Material	Max. Vacuum		Each
2 1/2", 3", 4"	3.74", 4.33", 5.12"	63, 80, 100	ISO-K	Aluminum	1 × 10 ^-9 torr @ 72° F	0000000	00000
For Quick-Clamp Gauge Connection—Clamp with Wing Nut
1"	1.57"	25	ISO-KF	Aluminum	1 × 10 ^-7 torr @ 72° F	0000000	00000

Rings for Pumps with Claw-Clamp Intake Connection

Ring

				Material
For Tube OD	For Flange OD	Trade Number	High Vacuum Connection Type	O-Ring	Inner Ring	Max. Vacuum	Max. Temp., °F		Each
For Claw-Clamp Intake Connection
2 1/2"	3.74"	63	ISO-K	Viton® Fluoroelastomer Rubber	304 Stainless Steel	1 × 10 ^-9 torr @ 72° F	400°	0000000	000000
For Quick-Clamp Gauge Connection
1"	1.57"	25	ISO-KF	Fluoroelastomer Rubber	304 Stainless Steel	1 × 10 ^-7 torr @ 72° F	300°	0000000	0000

Gaskets for Pumps with Flanged Intake Connection

Gasket

For Tube OD	For Flange OD	Gasket Material	Specifications Met		Each
1 1/2"	2 3/4"	Copper	ASTM F68	0000000	00000
2 1/2"	4 1/2"	Copper	ASTM F68	0000000	0000

Steam-Powered Jet Pumps

Use plant steam to pump liquids and gases, prime pumps, and remove fumes. When high-pressure steam enters the intake, it creates suction that draws a second liquid or gas into the pump body and discharges a pressurized blend of the two. The discharge pressure is greater than the suction flow but lower than the intake pressure. Gas suction flow is calculated using steam at atmospheric pressure. They have no moving parts or seals, eliminating downtime for lubrication and repairs. They're also known as eductors, ejectors, and injectors.

Note: Liquid suction flow rate is calculated using 80 psi steam at 0-40 feet of discharge head.

Bronze is more corrosion resistant than cast iron.

316 stainless steel pumps provide the most corrosion resistance.