ventilation drying prevention of condensation damage in

Ventilation Drying

Prevention of

Condensation Damage

in Hydraulic Units

GIEBEL FilTec GmbH | Carl-Zeiss-Str. 5 | D-74626 Bretzfeld / Germany | [email protected] | www.giebel-adsorber.de

2

Formation of Condensation

Avoidance by Dehumidification

Operation on Hydraulic Power Packs

Selection of Ventilation Dryers

GIEBEL FilTec GmbH

Selection of aeration dryers


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GIEBEL FilTec GmbH


Specialization

4

Our world is the ventilation drying!


History

5

Origin Company Foundation R & D-Project New building

1971 1999 2013 2014


GIEBEL Adsorber®

6


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GIEBEL FilTec GmbH


Functionality

8

Transmission of forces, torque and energy by hydraulic pressure fluids!

→ Pressure equalization with ambient air

Air intake from the

environment

Passive air exchange

due to temperature

fluctuations

Active air exchange

by oil extraction and

-supply


Humidity

9

Absolute Humidity

Content of water vapor

Relative Humidity

Percentage to maximum

humidity

Content of water:

at 25°C and 90% rH → 20.7 g/m³

at 20°C and 80% rH → 13.8 g/m³

at 15°C and 60% rH → 7.7 g/m³

Wa

ter

Co

nte

nt

in A

ir [

g/m

³]

Temperature [°C]

Hu

mid

ity [

%]

T = 25°C Water 20.7g/m³

T = 20°C Water 13.8g/m³

T = 15°C Water 7.7g/m³


Dew Point

10

The temperature at

which the humidity will

condensate.

Dew point in the ambient air

at 25°C and 90% rH → 23.1°C dT = 1,9°C

at 20°C and 80% rH → 16.4°C dT = 3,6°C

at 15°C und 60% rH → 7.3°C dT = 7,7°C

Wa

ter

Co

nte

nt

in A

ir [

g/m

³]

Temperature [°C]

Hu

mid

ity [

%]

T = 25°C dT 1.9°C

T = 20°C dT 3.6°C

T = 15°C dT 7.7°C


Operation Conditions

11

Environment with …

… high humidity > 70% rH

… high temperature > 25°C

… high temperature fluctuations ca. 10°C

Systems …

… with a hygroscopic

hydraulic fluid

… of high importance


Formation of condensation 1

12

Hydraulic WITHOUT Adsorber

→ Use of a ventilation filter

without desiccant



13

Ambient air enriched

with moisture



14

• Hydraulic oil is removed

from the tank

• Oil level drops

• Pressure equalization by

incoming air

→ Inflowing air humidity

according to ambient air!



15

Hydraulic oil is pumped back

into the tank.

Oil level is rising

Pressure compensation

through outflowing humid air.



16

Cooling of the ambient air

below dew point

→ Emergence

condensation in the interior

→ Drops form and water

flows into the hydraulic oil


Oil saturation

17

Moisture limit

0,1 Extent-%

1000 mg/kg

To avoid damaging effects on the hydraulic

system, the water content should be below

the saturation point of the oil.


Damages as a Result

18

„80% of particles and water are

the cause of malfunctions and

damage in hydraulic systems,

gearboxes and rolling bearings“

Consequences:

• Hydrolyse – Rapid aging

and degradation of additives

• Promotion of corrosion

• Worse lubrication


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GIEBEL FilTec GmbH


Troubleshooting Adsorber

20

Adsorption of water, thereby lowering the

humidity and the dew point.

→ Prevention of condensation!


Prevention of condensation 1

21

Hydraulic WITH Adsorber

→ Use of an adsorber with

desiccant



22

Ambient air enriched

with moisture



23

• Hydraulic oil is removed

from the tank

• Oil level drops

• Pressure equalization by

incoming air

• Moisture is separated

→ Incoming humid

ca. 10% rH!



24

• Hydraulic oil is pumped

back into the tank

• Oil level is rising

Pressure equalization by

outgoing dry air



25

Cooling of the ambient air

below dew point

→ No condensation inside

→ No drops of water

→ No water in the hydraulic

oil


Result

26

Humidity after Adsorber

average 10% rH

• Content of water: 1.7 g/m³

• Dew point: -12.5°C

Wa

ter

Co

nte

nt

in A

ir [

g/m

³]

Temperature [°C]

Hu

mid

ity [

%]


Example Lift Bridge

27

hydraulic tank: 5000l

Oil: synthetic esters

Task: Lifting the bridge

Operation approx. 10x per day,

filling of cylinders

→ Application Adsorber VV

5XL-RV


Example Hydropower Plant

28


Oil: synthetic esters

Task: Turbine lubrication

Operation: Continuous

operation, circulating oil

lubrication

→ Application

Adsorber VV 5M-RV


Example Paper Machine

29


Oil: Mineral oil HLP46

Task: Central lubrication

system


operation, circulating oil

lubrication

→ Application

Adsorber VV 5M-R


Example Lock

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Task: Moving the gates

Operation: approx. 20-40x per

day, filling of cylinders

→ Application

Adsorber VV 3L-DV


Example Test Stand

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Task: Lubrication of test

gearboxes Automotive

Operation: continuous

operation, protection against

oil mist

→ Application

Adsorber VG 3L-D


Example Straddle Carrier

32

hydraulic tank: 55l


Task: brake cooling and

steering

Operation: Shift operation,

outdoor use, pendulum

movement

→ Application

Adsorber VV 2L-DV


Example Tunnel Boring Machine

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Task: Feed drill head

Operation: during use

continuous, low pendulum

→ Application

Adsorber MA 3M-DV


Example Training Plant

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hydraulic tank: 10l


Task: Training / Presentation

Operation: rarely, during

training

→ Application

Adsorber VV 2L-DV


Example Cruise Ship

35

hydraulic tank: 60l

Oil: biodegradable oil

Task: Lowering the lifeboats

Operation: "never" - only

during tests and possibly in

an emergency

→ Application

Adsorber VV 1L-DV


Example Injection Moulding Machine

36



Task: Closing the casting tools


operation, cycle approx. 100

sec.

→ Application

Adsorber VV 5XL-R


Example Excavator

37

Hydraulic tank: 200l

Oil: biodegradable oil

Task: earthmoving machine,

cylinder strokes

Operation: continuous use,

outdoor use, harsh conditions

→ Application

Adsorber MA 3M-R with

valve adapter 0.5bar


Other Examples

38

Gears

Mobile machines

Barrels

Transformers

Tank facilities

IBC


References

39

… und viele mehr !!


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GIEBEL FilTec GmbH


Adsorption

41

• Water molecules are bound in the pores

• Adsorption is based on attractions (Van der Waals forces)

• Van der Waals forces are solvable again → Desorption

• Maximum load, until equilibrium!

Silicagel

Pore-

diffusion

Surfaces-

diffusion


Color change Silicagel

42

Measuring data GIEBEL FilTec GmbH


Regeneration Silica gel

43



Function Hydraulic

44

Oil level drops:

• Humid supply air from

the environment

→ Dehumidification

Oil level rises:

• Oil-containing exhaust

air from the system

→ Self-regeneration


Oil on Desiccant

45

Oil-containing exhaust air:

• Without activated carbon,

an impregnation would take

place

• Block the

water-absorbent

pores

• Prevent further color

change


Life Time Adsorber

46

Aerator and

deaerator

with carbon

layer

Pure aerator

with bypass

valve


Valves

47

Protection during downtimes

No unnecessary loading

→ Extension of the

maintenance intervals!


Maintenance Interval

48



Condition in Tank

49

Air in the tank is dry!Water / Humidity is in the

tank!


Capacity Water

50

vV 130-PA

80 g Silica gel

max. 30 ml water

DV 310-PA

800 g Silica gel

max. 330 ml water

DV 560-PA

4,0 kg Silica gel

max. 1,6 ltr water

DV 790-MA

10,0 kg Silica gel

max. 4,0 ltr water

From ink glass, coke can, PET bottle, to canisters.


Dust Filter

51

Standard version with 3 micron

filter in every GIEBEL Adsorber

→ Protection against dirt and

humidity!

3 micron Paper 3 / 1 micron

Glass fiber3 micron

ePTFE Membrane


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GIEBEL FilTec GmbH


Parameters

53

How is the correct adsorber determined?

ValvesDoes the plant have shutdowns> 30% of the

operating time?

ApplicationsShould maintenance be as easy or cheap as

possible?

According ATEX Is it used in an Ex zone?

Offshore suitable Is the environment corrosive or aggressive?

Tank- & Pendulum-

volumeWhat is the tank and pendulum volume?


Handling

54

DisposableMaintenance unit complete "adsorber part"

Pre-assembled and airtight → Easy handling

RefillableMaintenance unit "silica gel" or "spare parts package"

Flexible part selection → Low operating costs

Simple, fast and without tools!


Use in Ex-zones

55

EC-Declaration of Conformity in

accordance with ATEX Product Directive

2014/34/EU (ATEX 2014)

Conformity assessment procedures

for ignition hazard analysis

II 2 G/D IIC T4

for adsorbers with an aluminum or

stainless steel housing


Offshore suitable

56

Suitable for corrosiveness

category C5-M “high”

according to DIN EN ISO

12944

Adsorber housing made of

stainless steel V4A

AISI 316L / 316Ti


Tank- & Pendulum Volume

57

Tank volume

= influences the amount of air to be

dried

Pendulum volume

(or air flow rate)

= influences the drying

performance

Systems without air exchange =

oil flows in the circuit or in opposite

cylinders


Ventilation Dryer

58

Ventilation dryers of the

VV, MA and ME series

protect the hydraulic power

pack from moisture.

Optimally designed and

optimized to the hydraulic

systems solution with a

high amount of desiccant.


Standard

59

Adsorber VV-D VV-DV VV-R VV-RV

Operating materials

All common hydraulic oils

Mineral oils

Biodegradable oils

Insulating oils

Refillable

Valves


Spezial

60

Adsorber MA-DV MA-RV ME-DV ME-RV MA-RV

Operating Materials


Mineral oils, biodegradable oils

Easily and hardly inflammable liquids

Skydrol

HyJet IV/V

Brake Fluids

Valves

Refillable

Use according to

ATEX 204

Offshore suitable


Oil Mist Seperator

61

The VG series is used for

heavily escaping oil mists.

The combination of

impeller and oil demister

with a high amount of

activated carbon, cleans

the exhaust air and

prevents contamination of

the ambient air.


Oil Mist Seperator

62

Adsorber VG-D VG-R

Operating

Materials


Mineral oils

Biodegradable oils

Insulating oils

Refillable


Accessories I

63

Flange Adapter according to DIN

24557 Bolt circle 73

mm, including flat

view and screws

Filling Adapter according to DIN

24557 With stainless

steel strainer and

filling opening, incl.

Screw plug


Accessories II

64

Oil Bypass

Adapteraccording to DIN

24557 Bolt circle 73

mm, for sucking in

and returning the oil

Protection

AdapterIncl. Low pressure

gauge and protection

valves, over / under

pressure from 0.18

bar


Accessories III

65

Wall MountFor easy installation

in tight spaces on a

wall

Oil SeperatorFor separating escaping

oil mist and for cooling the

air


Accessories IV

66

Mounting tubeIncrease of an

adsorber to avoid

obstacles

Elbow adapterDisplacement of an

adsorber to avoid

obstacles


Accessories V

67

Valve AdapterAdsorber application

on hydraulic tanks

with preload 0.5


Documentation

68

• Flyer and Data Sheet

• CAD-File (STEP-Format or other)

• Safety Data Sheet

• Installation & Maintenance Manual

• Risk & Hazard Analysis

• Maintenance Schedule

• Disposal and regeneration instructions

• Certificates

• Test reports 2.1

• Material witness 3.1

• Food Conformity

• ATEX-Conformity


GIEBEL Quality

69

Use in mining for 3 years

„and it works“

Aluminum-Adsorber:

Assembly in our factory

„… and this one too …“

Use in the sawmill for 5 years


More Information

www.giebel-adsorber.de

shop.giebel-adsorber.de

blog.giebel-adsorber.de

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https://www.giebel-adsorber.de/

https://shop.giebel-adsorber.de/

https://blog.giebel-adsorber.de/

Thank you

for your attention!

ventilation drying prevention of condensation damage in

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