Hydraulic Accumulators | McMaster-Carr

	Accumulator Type Accumulator Type


Bladder	Diaphragm

Piston

	For Use With For Use With

Hydraulic Fluid

Nitrogen

	Capacity Capacity

	Maximum Pressure Maximum Pressure

3,000 psi

4,000 psi

	Thread Size Thread Size

	Maximum Flow Rate Maximum Flow Rate

	Dash Size Dash Size

	Body Diameter Body Diameter

	Gender Gender

Female

Male

	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

	Overall Height Overall Height

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

DFARS Specialty Metals
COTS-Exempt

	Mounting Orientation Mounting Orientation

Any Position

Vertical

	Body Height Body Height

	For Accumulator Capacity For Accumulator Capacity

	Nitrogen Charge Nitrogen Charge

1,000 psi

2,100 psi

	For Accumulator Body Diameter For Accumulator Body Diameter

3 3/8"

4 1/2"

6 3/4"

	For Accumulator Manufacturer For Accumulator Manufacturer

	Mounting Stem Thread Size Mounting Stem Thread Size

25 Products

Sealed Hydraulic Accumulators

Charge these accumulators to the pressure you need, and they will help a system maintain a constant pressure during pump failure. Mount them in any orientation. UN/UNF (SAE Straight) thread connections have straight threads and are also known as O-ring Boss fittings.

Note: For safety, do not disassemble accumulators while they're under pressure.

Diaphragm accumulators have bags that can't be replaced.

Use a charging and gauging kit to increase or decrease an accumulator’s charge.

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

Diaphragms

Diaphragm

			Inlet/Outlet Connection for Hydraulic Fluid—UN/UNF (SAE Straight)			Inlet/Outlet Connection for Nitrogren			Body
Cap., fl. oz.	Max. Flow Rate, gpm	Max. Pressure, psi	Thread Size	Gender	Dash Size	Valve Type	Gender	O'all Ht.	Ht.	Dia.	Mounting Orientation		Each
Steel Body with Buna-N Rubber Diaphragm
16 1/2	25	3,000	3/4"-16	Female	08	Schrader	Male	6 7/8"	4 3/8"	4 1/8"	Any Position	0000000	0000000
33 1/2	25	3,000	3/4"-16	Female	08	Schrader	Male	7 7/8"	5 3/8"	5 3/8"	Any Position	0000000	000000
66 1/2	40	3,000	1 1/16"-12	Female	12	Schrader	Male	9 1/4"	6 13/16"	6 5/8"	Any Position	0000000	000000

Charging and Gauging Kits

00000000

Each

0000000

Pistons

Piston

			Inlet/Outlet Connection for Hydraulic Fluid—UN/UNF (SAE Straight)			Inlet/Outlet Connection for Nitrogren			Body
Cap., fl. oz.	Max. Flow Rate, gpm	Max. Pressure, psi	Thread Size	Gender	Dash Size	Valve Type	Gender	O'all Ht.	Ht.	Dia.	Bore Dia.	Mounting Orientation		Each
Steel Body with Buna-N Rubber Seal
16	100	4,000	3/4"-16	Female	08	Schrader	Male	13 3/8"	12 7/16"	2 3/8"	2"	Any Position	0000000	0000000
32	100	4,000	3/4"-16	Female	08	Schrader	Male	21 7/8"	20 15/16"	2 3/8"	2"	Any Position	0000000	000000

Charging and Gauging Kits

00000000

Each

0000000

Charged Sealed Hydraulic Accumulators

These accumulators come with a charge of nitrogen and are ready to use. They help a system maintain a constant pressure during pump failure. Mount these accumulators in any orientation. UN/UNF (SAE Straight) thread connections have straight threads and are also known as O-ring Boss fittings.

Note: For safety, do not disassemble accumulators while they're under pressure.

Diaphragm accumulators have bags that can't be replaced.

Use a charging and gauging kit to increase or decrease an accumulator’s charge.

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

Diaphragms

Diaphragm

				Inlet/Outlet Connection for Hydraulic Fluid—UN/UNF (SAE Straight)			Inlet/Outlet Connection for Nitrogen			Body
Cap., fl. oz.	Max. Flow Rate, gpm	Max. Pressure, psi	Nitrogen Charge, psi	Thread Size	Gender	Dash Size	Valve Type	Gender	O'all Ht.	Ht.	Dia.	Mounting Orientation		Each
Steel Body with Buna-N Rubber Diaphragm
16 1/2	25	3,000	1,000	3/4"-16	Female	08	Schrader	Male	6 7/8"	4 3/8"	4 1/8"	Any Position	0000000	0000000
66 1/2	40	3,000	1,000	1 1/16"-12	Female	12	Schrader	Male	9 1/4"	6 13/16"	6 5/8"	Any Position	0000000	000000

Charging and Gauging Kits

00000000

Each

0000000

Pistons

Piston

				Inlet/Outlet Connection for Hydraulic Fluid—UN/UNF (SAE Straight)			Inlet/Outlet Connection for Nitrogen			Body
Cap., fl. oz.	Max. Flow Rate, gpm	Max. Pressure, psi	Nitrogen Charge, psi	Thread Size	Gender	Dash Size	Valve Type	Gender	O'all Ht.	Ht.	Dia.	Bore Dia.	Mounting Orientation		Each
Steel Body with Buna-N Rubber Seal
16	100	4,000	1,000	3/4"-16	Female	08	Schrader	Male	13 3/8"	12 7/16"	2 3/8"	2"	Any Position	0000000	0000000
32	100	4,000	1,000	3/4"-16	Female	08	Schrader	Male	21 7/8"	20 15/16"	2 3/8"	2"	Any Position	0000000	000000

Charging and Gauging Kits

00000000

Each

0000000

Bladder-Style Hydraulic Accumulators

Charge these accumulators to the pressure you need, and they will help a system maintain a constant pressure during pump failure. Mount accumulators within 25° of vertical. UN/UNF (SAE Straight) thread connections have straight threads and are also known as O-ring Boss fittings.

Note: For safety, do not disassemble accumulators while they're under pressure.

Use a charging and gauging kit to increase or decrease an accumulator's charge.

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

Accumulators
			Inlet/Outlet Connection for Hydraulic Fluid—UN/UNF (SAE Straight)			Inlet/Outlet Connection for Nitrogen			Body					Repl. Bladder Bags
Cap.	Max. Flow Rate, gpm	Max. Pressure, psi	Thread Size	Gender	Dash Size	Valve Type	Gender	O'all Ht.	Ht.	Dia.	Mounting Orientation		Each		Each
Steel Body with Buna-N Rubber Bag and Seal
16 fl. oz.	40	3,000	1 1/16"-12	Female	12	Schrader	Male	10 3/4"	6 7/8"	3 3/8"	Vertical	00000000	0000000	00000000	0000000
32 fl. oz.	40	3,000	1 5/16"-12	Female	16	Schrader	Male	11 1/8"	7 5/8"	4 1/2"	Vertical	00000000	00000000	00000000	000000
1 gal.	150	3,000	1 5/8"-12	Female	20	Schrader	Male	17"	11 3/8"	6 3/4"	Vertical	00000000	00000000	00000000	000000
2 1/2 gal.	220	3,000	1 7/8"-12	Female	24	Schrader	Male	21 3/8"	15 1/2"	9"	Vertical	00000000	00000000	00000000	000000
5 gal.	220	3,000	1 7/8"-12	Female	24	Schrader	Male	33 3/8"	27 1/2"	9"	Vertical	00000000	00000000	00000000	000000

Charging and Gauging Kits

00000000

Each

0000000

Charged Bladder-Style Hydraulic Accumulators

These accumulators come with a charge of nitrogen and are ready to use. They help a system maintain a constant pressure during pump failure. Mount accumulators within 25° of vertical. UN/UNF (SAE Straight) thread connections have straight threads and are also known as O-ring Boss fittings.

Note: For safety, do not disassemble accumulators while they're under pressure.

Use a charging and gauging kit to increase or decrease an accumulator's charge.

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

Accumulators
				Inlet/Outlet Connection for Hydraulic Fluid—UN/UNF (SAE Straight)			Inlet/Outlet Connection for Nitrogen			Body					Repl. Bladder Bags
Cap.	Max. Flow Rate, gpm	Max. Pressure, psi	Nitrogen Charge, psi	Thread Size	Gender	Dash Size	Valve Type	Gender	O'all Ht.	Ht.	Dia.	Mounting Orientation		Each		Each
Steel Body with Buna-N Rubber Bag and Seal
16 fl. oz.	40	3,000	1,000	1 1/16"-12	Female	12	Schrader	Male	10 3/4"	6 7/8"	3 3/8"	Vertical	00000000	000000000	00000000	0000000
32 fl. oz.	40	3,000	1,000	1 5/16"-12	Female	16	Schrader	Male	11 1/8"	7 5/8"	4 1/2"	Vertical	00000000	00000000	00000000	000000
1 gal.	150	3,000	2,100	1 5/8"-12	Female	20	Schrader	Male	17"	11 3/8"	6 3/4"	Vertical	00000000	00000000	00000000	000000
2 1/2 gal.	220	3,000	2,100	1 7/8"-12	Female	24	Schrader	Male	21 3/8"	15 1/2"	9"	Vertical	00000000	00000000	00000000	000000
5 gal.	220	3,000	2,100	1 7/8"-12	Female	24	Schrader	Male	33 3/8"	27 1/2"	9"	Vertical	00000000	00000000	00000000	000000

Charging and Gauging Kits

00000000

Each

0000000

Bladder Bags for Hydraulic Accumulators

Replace bladder bags when they show signs of wear.

For Accumulator				Mounting Stem Thread
Cap.	Dia.	Manufacturer	Bag Material	Size	Type		Each
16 oz.	3 3/8"	Accumulators Inc., Bosch, Greer, Hydac, Oil Air, Parker, Vickers	Buna-N Rubber	5/8"-18	UN/UNF (SAE Straight)	00000000	0000000
32 oz.	4 1/2"	Accumulators Inc., Bosch, Greer, Hydac, Oil Air, Parker, Vickers	Buna-N Rubber	5/8"-18	UN/UNF (SAE Straight)	00000000	000000
1 gal.	6 3/4"	Accumulators Inc., Bosch, Greer, Hydac, Oil Air, Parker, Vickers	Buna-N Rubber	7/8"-14	UN/UNF (SAE Straight)	00000000	000000
2 1/2 gal.	9"	Accumulators Inc., Bosch, Greer, Hydac, Oil Air, Parker, Vickers	Buna-N Rubber	7/8"-14	UN/UNF (SAE Straight)	00000000	000000
5 gal.	9"	Accumulators Inc., Bosch, Greer, Hydac, Oil Air, Parker, Vickers	Buna-N Rubber	7/8"-14	UN/UNF (SAE Straight)	00000000	000000