STA-S Series Bladder Accumulators

Stauff_Accumulator_Bladder

Introduction

Bladder accumulators provide a means of regulating the performance of a hydraulic system.

They are suitable for storing energy under pressure, absorbing hydraulic shock, dampening pump pulsation and flow fluctuations.

Bladder accumulators provide excellent gas and fluid separation ensuring dependable performance, maximum efficiency, and long service life.

Why use a Bladder Accumulator?

  • Improves your systems efficiency
  • Supplements your pump flow
  • Supplies extra power in an emergency
  • Compensates for any system leakage
  • Absorbs hydraulic shocks
  • Accepted world wide
  • High/Low temperature tolerance
  • Extremely safe (can not disassemble under pressure)
  • Quick response
  • Wide range of compounds for a variety of fluids

Accumulator Function

The design of the Stauff bladder accumulator makes use of the difference in the compressibility between a gas (nitrogen) and a liquid (hydraulic fluids). The bladder contained in the shell is pre-charged with nitrogen gas to a pressure determined by the work to be done.

After pre-charging, the bladder occupies the entire volume of the shell, from there the work can be split into three steps.

Step 1. When the hydraulic fluid enters the accumulator, the nitrogen contained in the bladder is compressed and its pressure is increased.

Step 2. The compression of the bladder stops when the pressure of the fluid and nitrogen are equal (balanced). During this step the bladder is not subject to any abnormal mechanical stress.

Step 3. On demand, as system pressure falls, the accumulator's stored fluid is returned to the system under pressure applied by the compressed nitrogen. On completion of the hydraulic system functions, the accumulator reverts to step 1.

Material Options & Features

Main Components Standard Material Material Options Features
Shell
  • Chrome - Molybdenum Alloy Steel, (SA-372)
  • All Sizes Comply with ASME Materials Specifications

 

Consult Factory
  • Meets 4:1 safety requirements
  • Seamless shell
  • 1 gallon and larger Supplied with ASME Certification
  • Available with Foreign or Domestic Certificates (Consult Stauff)
Bladder
  • Buna (LTB) (Low Temp.)
Temp. Rating
°F °C
-40 to +160 -40 to +70
Consult Factory for other options Temp. Rating
°F °C
  • Viton - (V)
+5 to +300 -15 to +150
  • EPR - (E)
-40 to +250 -40 to +120
  • Buna - (N)
-5 to +194 -20 to +90
  • 1 piece fully enclosed molded bladder
  • With molded steel valve stems
  • Wide range of operating temperatures
Oil Port Assembly
  • AISI 4130 material spec.
Consult Factory
  • Proven design and reliability
  • Port options available, refer to ordering code

 

Bladder Accumulator Features

  • Meets A.S.M.E. specifications
  • 4:1 design factor at normal operating pressures
  • Also available with foreign certificates (upon request)
  • Interchangeable with most competitor's units
  • All standard accumulators available from stock

Maximum Flow Rates

Size (gallon) Max. Recommended Flow
GPM LPM
1 QT 40 150
1 150 565
2.5 - 15 220 830

 

3000 PSI / 207 Bar Bottom Repairable

 

Stauff_Accumulator_3000 PSI_Bottom Repair_Dwg

 

 

Nominal
Capacity
Gallons
(Liters)
Gas
Volume
in³
(cm³)
Maximum
Working
Pressure
PSI
(bar)
Dimensions Net
Weight
A B C D E F
in
(mm)
in
(mm)
in
(mm)
SAE in
(mm)
SAE Lbs.
(Kg.)
*1 Qt.
(1.0)
68.4
(1,190)
3000
(207)
4.60
(117)
11.75
(298)
2.16
(55)
SAE-12
(1-1/16" - 12)
1.65
(42)
N/A 10
(4.5)
1.0
(4.0)
226
(3,845)
3000
(207)
6.80
(168)
17.00
(432)
3.63
(92)
SAE-20
(1-5/8" - 12)
2.40
(61)
SAE-6
(9/16 - 18)
34
(15)
2.5
(10)
555
(9,620)
3000
(207)
9.00
(229)
20.50
(520)
3.75
(95)
SAE-24
(1-7/8" - 12)
3.00
(76)
SAE-6
(9/16 - 18)
95
(43)
5.0
(20)
1,095
(19,480)
3000
(207)
9.00
(229)
32.30
(820)
3.75
(95)
SAE-24
(1-7/8" - 12)
3.00
(76)
SAE-6
(9/16 - 18)
139
(63)
10
(40)
2,080
(36,560)
3000
(207)
9.00
(229)
53.50
(1,360)
3.75
(95)
SAE-24
(1-7/8" - 12)
3.00
(76)
SAE-6
(9/16 - 18)
229
(104)
11
(44)
2,360
(41,210)
3000
(207)
9.00
(229)
59.50
(1,510)
3.75
(95)
SAE-24
(1-7/8" - 12)
3.00
(76)
SAE-6
(9/16 - 18)
249
(113)
15
(60)
3,460
(56,396)
3000
(207)
9.00
(229)
77.16
(1,960)
3.75
(95)
SAE-24
(1-7/8" - 12)
3.00
(76)
SAE-6
(9/16 - 18)
286
(130)
*In accordance with ASME VIII Calculations Only.

 

3000 PSI / 207 Bar Top Repairable

 

Stauff_Accumulator_3000 PSI_Top Repair_Dwg

 

 

Nominal
Capacity
Gallons
(Liters)
Gas
Volume
in³
(cm³)
Maximum
Working
Pressure
PSI
(bar)
Dimensions Net
Weight
A B C D E F
in
(mm)
in
(mm)
in
(mm)
SAE in
(mm)
SAE Lbs.
(Kg.)
2.5
(10)
555
(9,620)
3000
(207)
21.50
(546)
3.70
(94)
9.00
(229)
SAE-24
(1-7/8" - 12)
3.00
(76)
SAE-6
(9/16 - 18)
95
(43)
5.0
(20)
1,095
(19,480)
3000
(207)
33.00
(838)
3.70
(94)
9.00
(229)
SAE-24
(1-7/8" - 12)
3.00
(76)
SAE-6
(9/16 - 18)
139
(63)
10*
(40)
2,080
(36,560)
3000
(207)
53.75
(1,365)
3.70
(94)
9.00
(229)
SAE-24
(1-7/8" - 12)
3.00
(76)
SAE-6
(9/16 - 18)
229
(104)
11
(44)
2,360
(41,210)
3000
(207)
60.75
(1,543)
3.70
(94)
9.00
(229)
SAE-24
(1-7/8" - 12)
3.00
(76)
SAE-6
(9/16 - 18)
249
(113)
15*
(60)
3,460
(56,396)
3000
(207)
77.50
(1,969)
3.70
(94)
9.00
(229)
SAE-24
(1-7/8" - 12)
3.00
(76)
SAE-6
(9/16 - 18)
286
(130)
*Consult Factory for Availability.

 

5000 PSI / 345 Bar Bottom Repairable

 

Stauff_Accumulator_5000 PSI_Bottom Repair_Dwg

 

 

Nominal
Capacity
Gallons
(Liters)
Gas
Volume
in³
(cm³)
Maximum
Working
Pressure
PSI
(bar)
Dimensions Net
Weight
A B C D E F
in
(mm)
in
(mm)
in
(mm)
SAE in
(mm)
SAE Lbs.
(Kg.)
1.0*
(4.0)
226
(3,845)
5000
(345)
7.14
(181)
17.25
(438)
3.25
(83)
SAE-20
(1-5/8" - 12)
2.25
(57)
SAE-6
(9/16 - 18)
50
(23)
2.5
(10)
555
(9,620)
5000
(345)
9.75
(246)
22.75
(579)
3.88
(99)
SAE-24
(1-7/8" - 12)
3.00
(76)
SAE-6
(9/16 - 18)
125
(57)
5.0*
(20)
1,095
(19,480)
5000
(345)
9.75
(246)
34.75
(883)
3.88
(99)
SAE-24
(1-7/8" - 12)
3.00
(76)
SAE-6
(9/16 - 18)
200
(91)
10
(40)
2,080
(36,560)
5000
(345)
9.75
(246)
56.25
(1,430)
3.88
(99)
SAE-24
(1-7/8" - 12)
3.00
(76)
SAE-6
(9/16 - 18)
350
(159)
15*
(60)
3,460
(56,396)
5000
(345)
9.75
(246)
78.75
(2,000)
3.88
(99)
SAE-24
(1-7/8" - 12)
3.00
(76)
SAE-6
(9/16 - 18)
500
(227)
*Consult Factory for Availability.