Freudenberg / TOBUL Bladder Accumulators
– Widely Accepted Industry-Standard Design
– Quick Response to Fluid System Demands
– Very Contaminant Tolerant
– Completely Repairable
– A Variety of Models Available


Reference Material:
Top Repairable Bladder Accumulators (PDF)
energy storage, shock or pulsation dampening, leakage compensation, thermal expansion, energy conservation/supplement pump flow, noise reduction, and improved response time.
Our Bladder Accumulators are constructed of high strength seamless chrome-moly carbon steel shells, with high grade elastomeric bladders, which are assembled in accordance with ASME pressure vessel standards. Available in a variety of industry-standard capacities and pressures, the bladder type excels at absorbing system shocks and pulsations, especially those of high frequency/low modulation
ASME/NB
CE/PED
SELO
BOTTOM REPAIRABLE TBR MODELS
Bottom repairable bladder-type designs are the most commonly found units in the marketplace. Fluid capacities are generally limited to a small variety of sizes (one quart to fifteen gallons/approximately 1 Liter to 57 Liters).
General Design Data
Maximum Working Pressure: 3,000 PSI (207 Bar)
(Buna/Nitrile) Operating Temperature: -20° to +200° F (-28° to 93° C)
Bladder for petroleum base oil.
Shell ASME U stamp OPTIONAL.
Specifications subject to change without notice.
TBR30 (1 Quart) – 3,000 PSI
Part # | Old Part # | Gas Capacity | Fluid Capacity | Dry Weight | (C) | (D) | (E) Fluid Port |
---|---|---|---|---|---|---|---|
TBR30-.2NMD* | TBR30-.2-N | 73 In3 | .25 Gallons | 10 lbs. | 2.125" | 1.375" | SAE-16 or 1" NPT |
TBR30 (1 Gallon) – 3,000 PSI
Part # | Old Part # | Gas Capacity | Fluid Capacity | Dry Weight | (C) | (D) | (E) Fluid Port |
---|---|---|---|---|---|---|---|
TBR30-1NMEA* | TBR30-1-N | 235 In3 | 1 Gallon | 34 lbs. | 4" | 2.38" | SAE-20 or 1.25" NPT |
TBR30 – 3,000 PSI
Part # | Old Part # | Gas Capacity | Fluid Capacity | Dry Weight | (A) | (B) Fluid Port |
---|---|---|---|---|---|---|
TBR30-2.5NMFA* | TBR30-2.5-N | 600 In3 | 2.5 Gallons | 80 lbs. | 21" | SAE-24 or 2" NPT |
TBR30-5NMFA* | TBR30-5-N | 1,203 In3 | 5 Gallons | 120 lbs. | 33.25" | SAE-24 or 2" NPT |
TBR30-10NMFA* | TBR30-10-N | 2,259 In3 | 10 Gallons | 220 lbs. | 54" | SAE-24 or 2" NPT |
TBR30-11NMFA* | TBR30-11-N | 2,535 In3 | 11 Gallons | 240 lbs. | 59.5" | SAE-24 or 2" NPT |
TBR30-15NMFA* | TBR30-15-N | 3,440 In3 | 15 Gallons | 305 lbs. | 77.5" | SAE-24 or 2" NPT |
TOP REPAIRABLE TBRT MODELS
Top repairable bladder-type designs are readily available in the marketplace, but much less commonly seen than bottom repairable units. TBRT’s are more expensive than TBR’s since an additional gas port body and anti-extrusion ring is necessary to completely seal the accumulator shell.
Top Repairable Versus Bottom Repairable:
The distinct advantage of a top repairable unit is the fact that a unit may be repaired without dismounting an accumulator from the system. As long as the unit can be isolated and the system pressure relieved, the top gas port assembly can be accessed and a replacement bladder installed.
General Design Data
Maximum Working Pressure: 3,000 PSI (207 Bar)
(Buna/Nitrile) Operating Temperature: -20° to +200° F (-28° to 93° C)
Bladder for petroleum base oil.
Shell ASME U stamp OPTIONAL.
Specifications subject to change without notice.
TBRT30 – 3,000 PSI
Part # | Old Part # | Gas Capacity | Fluid Capacity | Dry Weight | (A) | (B) Fluid Port |
---|---|---|---|---|---|---|
TBRT30-2.5NMFA* | TBRT30-2.5-N | 600 In3 | 2.5 Gallons | 80 lbs. | 21" | SAE-24 or 2" NPT |
TBRT30-5NMFA* | TBRT30-5-N | 1,203 In3 | 5 Gallons | 120 lbs. | 33.25" | SAE-24 or 2" NPT |
TBRT30-10NMFA* | TBRT30-10-N | 2,259 In3 | 10 Gallons | 220 lbs. | 54" | SAE-24 or 2" NPT |
TBRT30-11NMFA* | TBRT30-11-N | 2,535 In3 | 11 Gallons | 240 lbs. | 59.5" | SAE-24 or 2" NPT |
TBRT30-15NMFA* | TBRT30-15-N | 3,440 In3 | 15 Gallons | 305 lbs. | 77.5" | SAE-24 or 2" NPT |
OPEN TOP BLADDER ECONOLATER II MODELS
The “EconoLator II” is a Tobul product series which is a transition from piston-type to bladder-type accumulators, and incorporates characteristics of both designs.
Utilizes a cylindrical steel cylinder with heads similar to piston-types. The fluid cap (bottom) is precision machine-welded into the steel cylinder to form a durable vessel.
Utilizes an upper cap and threaded ring assembly to retain and seal the open-topped bladder, providing a simple “top-repairable” advantage; e.g., unit does not have to be removed from a vertically mounted application in order to replace bladder as long as the accumulator can be isolated from system pressure and physically accessible.
EBR20 – 2,000 PSI
General Design Data
Maximum Working Pressure: 2,000 PSI (138 Bar)
(Buna/Nitrile) Operating Temperature: -20° to +200° F (-28° to 93° C)
Bladder for petroleum base oil.
Specifications subject to change without notice.
Part # | Old Part # | Gas Capacity | Fluid Capacity | Dry Weight | (A) | (B) | (C) Fluid Port | (D) |
---|---|---|---|---|---|---|---|---|
EBR20-1NA9 | EBR20-30 | 29 In3 | 0.12 Gallons | 11 lbs. | 10" | 9.50" | SAE-8 | 3.25" |
EBR20-2NAB | EBR20-60 | 58 In3 | 0.25 Gallons | 25 lbs. | 10.125" | 8.875" | SAE-12 | 4.625" |
Type | Part # |
---|---|
1 Pint | EB-1N* |
1 Quart | EB-2N* |
EBR30 – 3,000 PSI
General Design Data
Maximum Working Pressure: 3,000 PSI (138 Bar)
(Buna/Nitrile) Operating Temperature: -20° to +200° F (-28° to 93° C)
Bladder for petroleum base oil.
Specifications subject to change without notice.
Part # | Old Part # | Gas Capacity | Fluid Capacity | Dry Weight | (A) | (B) | (C) Fluid Port | (D) |
---|---|---|---|---|---|---|---|---|
EBR30-1NA9 | EBR30-30 | 29 In3 | 0.12 Gallons | 11 lbs. | 10" | 9.50" | SAE-8 | 3.25" |
EBR30-2NAB | EBR30-60 | 58 In3 | 0.25 Gallons | 25 lbs. | 10.125" | 8.875" | SAE-12 | 4.75" |
Type | Part # |
---|---|
1 Pint | EB-1N* |
1 Quart | EB-2N* |
EBR50 – 5,000 PSI
General Design Data
Maximum Working Pressure: 5,000 PSI (138 Bar)
(Buna/Nitrile) Operating Temperature: -20° to +200° F (-28° to 93° C)
Bladder for petroleum base oil.
Specifications subject to change without notice.
Part # | Old Part # | Gas Capacity | Fluid Capacity | Dry Weight | (A) | (B) | (C) Fluid Port | (D) |
---|---|---|---|---|---|---|---|---|
EBR30-1NA9 | EBR30-30 | 29 In3 | 0.12 Gallons | 11 lbs. | 10" | 9.50" | SAE-8 | 3.25" |
EBR30-2NAB | EBR30-60 | 58 In3 | 0.25 Gallons | 25 lbs. | 10.125" | 8.875" | SAE-12 | 4.75" |
Type | Part # |
---|---|
1 Pint | EB-1N* |
1 Quart | EB-2N* |
3,000 PSI Bladder Repair Kits
Includes: (1) Bladder, (1) Gas Valve and O-Ring, (2) Poppet Valve O-Rings and (2) O-Ring Backups
Part # | Old Part # | Fluid Capacity |
---|---|---|
BK30-.2N | RB30-.2-NT | 1 Quart |
BK30-1N | RB30-1-NT | 1 Gallon |
BK30-2.5N | RB30-2.5-NT | 2.5 Gallons |
BK30-5N | RB30-5-NT | 5 Gallons |
BK30-10N | RB30-10-NT | 10 Gallons |
BK30-11N | RB30-11-NT | 11 Gallons |
BK30-15N | RB30-15-NT | 15 Gallons |
*BR instead of BK is a kit without the anti-extrusion ring