FAQ - General

FAQ - General

I have not been a Festo customer before. Can I still buy parts from Festo?

Yes, you can obtain parts via a dealer support centre or register with Festo as a new customer.

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How can I find out who my contact person is?

Your nearest contacts at Festo are listed under "Festo addresses worldwide".

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What does an equivalent circuit for an OR module look like?

Sample circuit diagram

ODER-Ersatzschaltung

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How can I create a self-latching loop using pneumatic components?

Sample circuit diagram

 Selbsthaltung

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Where can I find operating instructions and manuals on the Festo website?

Operating instructions and manuals can be found in the "Support" menu under the menu item User documentation.

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Where can I get information about prices?

All customers are able to log on to the Festo Online Shop . It provides online information about prices and delivery.

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What is the difference between a G-thread and an R-thread?
G-threads have a cylindrical form in accordance with the EN-ISO 228-1 standard. R-threads have a conical form in accordance with the ISO 7-1 standard. In the case of a thread of size 1/8", for example, the threads are specified as G1/8 or R1/8. Male G-threads (cylindrical) can only be screwed into female G-threads. Male R-threads (conical) can be screwed into female G or R-threads.

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What are the dimensions of G-threads?
Thread
designation
Diameter

inches
Outside
diameter
mm
Nut
diameter
mm
Tap hole
diameter
mm
Turns per
inch
G 1/8" 1/8 9.73 8.85 8.80 28
G 1/4" 1/4 13.16 11.89 11.80 19
G 3/8" 3/8 16.66 15.39 15.25 19
G 1/2" 1/2 20.95 19.17 19.00 14
G 3/4" 3/4 26.44 24.66 24.50 14
G 1" 1 33.25 30.93 30.75 11
G 1 1/4" 1 1/4 41.91 35.59 39.25 11
G 1 1/2" 1 1/2 47.80 45.48 45.25 11
G 2" 2 59.61 57.29 57.00 11

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What is the maximum permissible thread length for fittings?

The part of the fitting that can be screwed into a valve (for example) may not exceed a maximum length. If you use Festo fittings, the length is guaranteed to be correct.

 

Thread diameter C max mm
M3 3.3
M5 4.3
M7 5.8
G 1/8 6.5
G 1/4 8.0
G 3/8 9.0
G 1/2 10.5
G 3/4 12.0
G 1 13.0

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Can Festo products be operated with nitrogen?

Nitrogen can be used as a pressure medium as long as the following constraints are adhered to:

  • The nitrogen used must be available in a gaseous state
  • The operating pressure and operating temperatures must comply with the values specified for compressed air on the data sheet
  • Contamination of the nitrogen used in terms of residual humidity, residual oil content etc. corresponds to the specifications in the catalogue for operation with compressed air

Provided that these parameters are adhered to, the products can be operated without any significant restriction to their service life.

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What does LABS mean?
This abbreviation stands for paint-wetting impairment substances. They may be contained in silicone, substances containing fluorine, and certain oils and greases. Components used in the automotive industry, and especially in paint shops, must be free of paint-wetting impairment substances.

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What does KBK mean?

CRC stands for corrosion resistance class.

 

  • CRC 0: very low protection or none at all. No corrosion stress. Applies to small, optically irrelevant standard parts such as threaded pins, circlips and clamping sleeves which are usually only available on the market in a phosphated or burnished version (and possibly oiled) as well as to ball bearings (for components < CRC 3) and plain bearings.
  • CRC 1: low protection. Low corrosion stress. Dry internal application or transport and storage protection. Also applies to parts behind covers, in the non-visible interior area, and parts which are covered in the application (e.g. drive trunnions).
  • CRC 2: medium protection. Moderate corrosion stress. Internal application in which condensation may occur. External visible parts with primarily decorative requirements for the surface and which are in direct contact with the ambient atmosphere typical for industrial applications.
  • CRC 3: high protection. High corrosion stress. Outdoor exposure under moderate corrosive conditions. External visible parts in direct contact with the ambient atmosphere typical for industrial applications or media such as solvents and cleaning agents, with primarily functional requirements for the surface.
  • CRC 4: extreme protection. Particularly high corrosion stress. Outdoor exposure under extreme corrosive conditions. Parts exposed to aggressive media, for instance in the chemical or food industries. Such applications may need to be safeguarded by means of special testing (see also FN940082) using appropriate media.

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What is a standard litre?
To DIN 1343
Festo
To ISO 6358
Pressure 1.01325 bar (abs) 1.0 bar (abs)
Temperature 0° C 20° C
Gas constant 287.07 J (kg K) 288 J (kg K)
Density 1.292 kg/m³ 1.185 kg/m³
Air humidity 0% 65%

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What does the serial number indicate?

The serial number indicates the period during which the products were manufactured. A detailed table can be found here

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Does Festo provide products for clean room applications?
All regular Festo products correspond to at least clean room class 10 000 as defined by the Federal Standard 209 F Airborne Particulate Cleanliness Classes (US FED-STD-209). Some standard products even correspond to class 100, while components up to class 0 are available as part of customised solutions.

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What does clean room classification according to US FED-STD-209 specify?
Using class 100 as an example: permits up to 100 airborne particles with a diameter of more than 0.5 µm per cft (cubic foot) of air (1 cft corresponds to 28.3 litres).

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How much does air weigh?
One cubic metre of air (1000 litres) weighs 1.292 kg (DIN 1343).

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Which is lighter – damp air or dry air?
Air gets lighter as it gets warmer. However, air also gets lighter as it becomes more humid. That is why we talk about water parts that are not visible (in gaseous form), not to be confused with mist (small drops of liquid water). Air essentially consists of a mixture of nitrogen and oxygen and has a molecular weight of approximately 29 grams, whereas the molecular weight of water vapour is only around 18 grams.

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What pressure is generated within the human lung?
The lung is a natural compressor able to process 100 l/min. This generates a pressure of 0.02 - 0.08 bar.

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