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Series
D8.770

Intensifiers air – oil, 57 - 188 cm3

intensification ratio 25 to 82.64
max. operating pressure up to 500 bar
single acting, with oil reservoir
Intensifiers air – oil, 57 - 188 cm3
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Catalogue sheet
Operating instructions
Information Series
Description
D 8.770 Pneumatic-hydraulic intensifiers 57 – 188 cm³

Description
This pneumatic-hydraulic intensifier can be used as a pressure generator where live cables are not possible or suitable, e.g. in hazardous surroundings. Only single-acting cylinders can be connected. The cylinder volume should utilise the stroke volume of the intensifier only up to 60 - 70% so as to have some reserve left.
When designing fixtures, some features of the air intensifier should be taken into account:

1. Extend cylinder
Intensifiers are liable to release the effective oil volume very quickly within 1 second. The oil speed depends only on the flow rate of the compressed air. This may cause malfunctions in clamping elements where the maximum flow rate is limited (swing clamps, work supports). In those cases a flow control valve must be provided on the oil side.

2. Pressure build-up
After extending the cylinders, pressure build-up is relatively slow, according to the nominal bore of the pneumatic piping and air pressure. At 6 bar the sextuple working volume must be fed, which takes approx. 3 seconds.

3. Unclamping
For this purpose, the air volume accumulated must first be reduced to a residual pressure below 0.2 bar, before the connected hydraulic cylinders retract. The high-speed vent valve available as an accessory allows for a pressure release time of approx. 2 seconds at an initial pressure of 6 bar.

4. Pressure adjustment
The hydraulic operating pressure can only be adjusted by means of a pressure reducing valve at the pneumatic side. 
We recommend our service unit part no. 9511 005.
Important note: The maximum operating pressure on the hydraulic side is determined by the component having the smallest admissible operating pressure. The pneumatic adjustment must be checked by a pressure gauge located on the hydraulic side.

5. Replenishment
Any minor leak losses are compensated after unclamping by replenishing out of the oil tank. This requires a well vented system and an oil filler screw slightly opened.

Products (4)
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type
with fixed high-pressure volume (4)
type
air - oil (4)
functioning
single acting (4)
hydraulic port
pipe thread (4)
type
with oil reservoir (4)
high-pressure volume, approx. [cm3]
intensification
max. low pressure [bar]
max. high pressure [bar]
max. flow rate low pressure [l/min]
- (4)
max. flow rate high pressure [l/min]
- (4)
Item no. CAD datatypetypefunctioninghydraulic port
Item no.
CAD data
/
type
with fixed high-pressure volume
type
air - oil
functioning
single acting
hydraulic port
pipe thread
Properties
Item no.
CAD data
/
type
with fixed high-pressure volume
type
air - oil
functioning
single acting
hydraulic port
pipe thread
Properties
Item no.
CAD data
/
type
with fixed high-pressure volume
type
air - oil
functioning
single acting
hydraulic port
pipe thread
Properties
Item no.
CAD data
/
type
with fixed high-pressure volume
type
air - oil
functioning
single acting
hydraulic port
pipe thread
Properties
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Item no.
type
with fixed high-pressure volume
type
air - oil
functioning
single acting
hydraulic port
pipe thread
type
with oil reservoir
high-pressure volume, approx. [cm3]
57
intensification
82.64
max. low pressure [bar]
6.3
max. high pressure [bar]
505
max. flow rate low pressure [l/min]
-
max. flow rate high pressure [l/min]
-
Item no.
type
with fixed high-pressure volume
type
air - oil
functioning
single acting
hydraulic port
pipe thread
type
with oil reservoir
high-pressure volume, approx. [cm3]
73
intensification
64
max. low pressure [bar]
8
max. high pressure [bar]
500
max. flow rate low pressure [l/min]
-
max. flow rate high pressure [l/min]
-
Item no.
type
with fixed high-pressure volume
type
air - oil
functioning
single acting
hydraulic port
pipe thread
type
with oil reservoir
high-pressure volume, approx. [cm3]
120
intensification
39.06
max. low pressure [bar]
8
max. high pressure [bar]
305
max. flow rate low pressure [l/min]
-
max. flow rate high pressure [l/min]
-
Item no.
type
with fixed high-pressure volume
type
air - oil
functioning
single acting
hydraulic port
pipe thread
type
with oil reservoir
high-pressure volume, approx. [cm3]
188
intensification
25
max. low pressure [bar]
8
max. high pressure [bar]
195
max. flow rate low pressure [l/min]
-
max. flow rate high pressure [l/min]
-
Accessories (14)
Item no. CAD data Description
Item no.
CAD data
/
Description
Foot valve with catch including cover as per data sheet D8.600
Item no.
CAD data
Description
Thread reducing adaptor GWR 3/8ED - 1/4 max. 400 bar, as per data sheet F9.300
Item no.
CAD data
/
Description
Hand lever valve with catch as per data sheet D8.600
Item no.
CAD data
/
Description
High-speed vent valve G 3/8 as per data sheet D8.770
Item no.
CAD data
/
Description
Check valve - size 1/4 as per data sheet D8.770
Item no.
CAD data
/
Description
Silencer - size 1/8 as per data sheet D8.600
Item no.
CAD data
/
Description
Socket end - size 1/8 as per data sheet D8.770
Item no.
CAD data
Description
Pressure gauge union type A with edge sealing ring G1/4 - pipe Ø 8 mm max. 500 bar, as per data sheet F9.300
Item no.
CAD data
Description
Tube male stud coupling D8L ED G1/4 - pipe Ø 8 mm max. 250 bar, as per data sheet F9.300
Item no.
CAD data
/
Description
Tube male stud coupling D12L as per data sheet D8.770
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