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STAUFF Accumulators
Diaphragm Accumulators
Product Information 22
Order Codes & Dimensions 23
Gas Valve Conversion Adaptors 24
Diaphragm Accumulators
STDA Series
STDA Accumulators
22
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Product Information
Diaphragm Accumulators ▪ Type STDA
Product Description
STAUFF diaphragm accumulators (non-repairable compact
type) are used to store low volumes for oil service for 0.07
& 2.8 Ltr models, with pressure up to 350 bar. The compact
design and construction includes a 1/2" or 3/4" BSPP uid port
connection (depending on accumulator size) as standard, tted
with a resilient diaphragm and the housing made of high tensile
steel construction.
Features
▪ Full ow uid port
▪ Standard Nitrile rubber high strength bladder
▪ High ow button style bladder / port design
▪ Non-repairable diaphragm accumulator
▪ Electron beam welded steel shell
▪ Corrosion resistant black enamel coating
Technical Data
▪ M28 x 1.5 connection with socket head cap screw (standard)
▪ NBR diaphragm material (standard)
▪ Maximum compression ratio of 8:1 - up to 1.4 Ltrs
6:1 - 2 & 2.8 Ltrs
▪ Operating temperature -10°C... +80°C
▪ Operating pressure to 250 - 350 bar
▪ Capacity up to 2.8 Ltrs
Options
Gas Port
▪ 1/4" gas valve with US style gas core
Oil Port
▪ BSP, metric, male / female metric combination
Diaphragm Material
▪ NBR Nitrile (Buna
®
)
▪ FKM Fluoroelastomer (Viton
®
)
Other materials available on request
Applications
▪ Mobile and stationary hydraulics
▪ Light industrial
▪ Transport
Maximum Flow Rates
Size (Ltr)
Maximum Recommended Flow
Normal
Operation
Fully
Discharging
GPM LPM GPM LPM
0.075 & 0.16 11 40 2.6 10
0.32 & 1.40 26 100 11 40
2.00 & 3.50 42 160 16 60
Main Components Standard Material Material Options
Shell
High strength alloy steel black enamel
coating (non-repairable electron-beam welded construction)
Other materials available on request
Diaphragm NBR (Buna N
®
)
Temperature Rating
Hydrin (ECO)
Temperature Rating
-10°C... +80°C
-32°C... +115°C
FPM (Viton
®
) -20°C... +140°C
Gas Valve Connection M28 with M6 socket head cap screw G1/4" with US style gas core
Fluid Port
Shut-Off Valve
Delrin
ØD
H
M28 x (1.5)
Hex
Components & Material
Electron Beam
Welding
Pressure Vessel
Lower Shell
Poppet Valve
MAG Welding
Diaphragm with
Poppet Valve
Clamp Ring
Pressure Vessel
Upper Shell
Fluid Port
Components & Material
M28 x 1.5 Gas Valve
(standard)
G1/4" Adaptor Connection
(optional)
Refer to page 23 for dimensions
Refer to pages 28 - 29 for accumulator clamps
23
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STDA Accumulators
Order Codes & Dimensions
Item No. Description
Nominal
Capacity (Ltr)
Maximum
Working
Pressure (bar)
Gas Valve
Connection
Fluid Port
Connection
Dimensions (mm)
Weight
(kg)
D H
Maximum
Pre-Charge (bar)
3426001010 STDA-007-NBR-P4-B-M-N/1 0.07 250 M28 x 1.5 G1/2" 64 111 130 0.7
3426001011 STDA-016-NBR-P4-B-M-N/1 0.16 250 M28 x 1.5 G1/2" 75 119 130 1
3426001012 STDA-032-NBR-P3-B-M-N/1 0.32 210 M28 x 1.5 G1/2" 92.5 134 130 1.4
3426001013 STDA-050-NBR-P3-B-M-N/1 0.5 210 M28 x 1.5 G1/2" 107 151 130 2
3426001014 STDA-075-NBR-P3-B-M-N/1 0.75 210 M28 x 1.5 G1/2" 121 166 130 2.6
3426001015 STDA-075-NBR-P5-D-M-N/1 0.75 350 M28 x 1.5 M33 Male G1/2" 128.5 184 130 4.4
3426001016 STDA-100-NBR-P3-B-M-N/1 1 210 M28 x 1.5 G1/2" 136 180 130 3.5
3426001017 STDA-140-NBR-P3-B-M-N/1 1.4 210 M28 x 1.5 G1/2" 147 191 130 6.6
3426001018 STDA-200-NBR-P4-B-M-N/1 2 250 M28 x 1.5 G3/4" 156 252 130 9.2
3426001019 STDA-280-NBR-P4-B-M-N/1 2.8 250 M28 x 1.5 G3/4" 174 267 125 10
3426001000 STDA-007-NBR-P4-B-G-N/1 0.07 250 G1/4" G1/2" 64 134 130 0.7
3426001001 STDA-016-NBR-P4-B-G-N/1 0.16 250 G1/4" G1/2" 75 142 130 1
3426001002 STDA-032-NBR-P3-B-G-N/1 0.32 210 G1/4" G1/2" 92.5 157 130 1.4
3426001003 STDA-050-NBR-P3-B-G-N/1 0.5 210 G1/4" G1/2" 107 174 130 2
3426001004 STDA-075-NBR-P3-B-G-N/1 0.75 210 G1/4" G1/2" 121 189 130 2.6
3426001005 STDA-075-NBR-P5-D-G-N/1 0.75 350 G1/4" M33 Male G1/2" 128.5 218 130 4.4
3426001006 STDA-100-NBR-P3-B-G-N/1 1 210 G1/4" G1/2" 136 203 130 3.5
3426001007 STDA-140-NBR-P3-B-G-N/1 1.4 210 G1/4" G1/2" 147 214 130 6.6
3426001008 STDA-200-NBR-P4-B-G-N/1 2 250 G1/4" G3/4" 156 275 130 9.2
3426001009 STDA-280-NBR-P4-B-G-N/1 2.8 250 G1/4" G3/4" 174 290 125 10
Order Codes and Dimensions
Diaphragm Material
Nitrile NBR NBR
Hydrin for Low Temp ECO ECO
Fluoroelastomer FKM FKM
Maximum Working Pressure
210 bar P3
250 bar P4
350 bar P5
Oil Port Connection
See Table Below
Gas Port Connection
M28 x 1.5 (standard) M
1/4" BSPP (adaptor) G
US Style Gas Valve (adaptor) U
Model Code
STAUFF Non Repairable Accumulator STDA STDA
Accumulator Volume
0.075 Ltr 250 bar 007
0.16 Ltr 250 bar 016
0.32 Ltr 210 bar 032
0.5 Ltr 210 bar 050
0.75 Ltr 210 or 350 bar 075
1 Ltr 210 bar 100
1.4 Ltr 210 bar 140
2 Ltr 250 bar 200
2.8 Ltr 250 bar 280
Other pressures available on request
STDA - 075 - NBR - P3 - B - M - N / 1
a
b
c
d
a b d e
f
c
e
g h
Non-Repairable
Non-Repairable N
Design Series
Design Series 1
f
g
h
Oil Port Connection
Code Connection Type
Volume
0.07 0.16 0.32 0.5 0.75 1 1.4 2 2.8
B* BSPP G1/2" G1/2" G1/2" G1/2" G1/2" G1/2" G1/2" G3/4" G3/4"
D
Metric Male M33 M33 M33 M33 M45 M45
BSPP Female G1/2" G1/2" G1/2" G1/2" G3/4" G3/4"
U** UNF 9/16-18 9/16-18 9/16-18 3/4-16 3/4-16 3/4-16 3/4-16 1 1/6-12 1 1/6-12
* Standard for Australia, Brazil, China and Europe
** Standard for North America
e
Checking Equipment
24
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STDA Accumulators
Gas Valve Adaptor
Gas Valve Conversion Adaptor
The gas valve conversion adaptor easily converts the standard M28 x 1.5 gas valve on diaphragm
accumulators to G 1/4" male connection.
Gas valve conversion adaptor includes:
▪ Adaptor body with installed gas valve core
▪ Adaptor seal
▪ Gas valve cap
Note: Before the gas valve adaptor can be used the existing socket head cap screw and seal
washer should be removed from the accumulator.
Important
Before tting the gas valve conversion adaptor to the accumulator:
▪ Ensure the accumulator is isolated from the hydraulic system and the system pressure has been
released from the accumulator (assuming accumulator is already tted to the hydraulic circuit)
▪ Ensure the gas pressure is released from the accumulator using the recommended charging kit
▪ Remove the existing socket head cap screw and sealing washer from the accumulator
▪ Ensure the gas valve adaptor is held rmly in a vice with the male connection pointed downwards
▪ Ensure the gas valve seal is well lubricated and then inserted into the adaptor (refer to image)
▪ Apply a small amount of thread sealant to the M28 male thread on the accumulator
▪ Screw the accumulator onto the gas valve adaptor using the M28 connection. Ensure the O-ring
seal in the adaptor remains in the correct sealing position.
▪ Tighten the adaptor until there is a positive seal
▪ After pre-charging the accumulator, make sure there is no leakage from the gas valve adaptor
by applying leak detection uid to the connection
Part No. Item No. Description
1
3426010682 STDA-ADPT-M28-1/4 - GAS VALVE
1
WOLLONGONG
NSW Australia
24-26 Doyle Avenue
Unanderra NSW 2526
Tel: 02 4271 9000
Fax: 02 4271 8432
Email: sales@stauff.com.au
ADELAIDE
SA Australia
1/3 Endeavour Drive
Port Adelaide SA 5015
Tel: 08 8415 1000
Fax: 08 8341 1604
Email: sant.sales@stauff.com.au
MELBOURNE
VIC Australia
3B 14-16 White Street
Oakleigh East VIC 3166
Tel: 03 8542 5400
Fax: 03 9543 5422
Email: vic.sales@stauff.com.au
AUCKLAND
New Zealand
Unit D, 103 Harris Road
East Tamakai, Auckland NZ
Tel: 09 271 4812
Fax: 09 271 4832
Email: sales@stauff.co.nz
SYDNEY
NSW Australia
27B Davis Road
Wetherill Park NSW 2164
Tel: 02 8787 8000
Fax: 02 9725 2744
Email: nsw.sales@stauff.com.au
BRISBANE
QLD Australia
83 Bluestone Circuit
Seventeen Mile Rocks QLD 4073
Tel: 07 3716 1000
Fax: 07 3715 8960
Email: qld.sales@stauff.com.au
C/STAUS/ACCUM/12.2015.1
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Local Solutions For Individual Customers Worldwide
