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FAQ

Frequently Asked Questions

Find answers to frequently asked questions

How can I contact CPP "PREMA" S.A.'s staff?

Contact details for sales representatives are available here.

Where can I find the prices of CPP "PREMA" S.A.'s products?

You can find the prices of products offered by our company at our online store.

We would also like to invite you to contact our sales representatives.

Where can I check a product's is availability? How long does it take for an order to process?

Current product availability can be found at our online store.

We would also like to invite you to contact our sales representatives.

Where can I view the catalogue?

You can find our product catalogues here.
We also invite you to use our online store.

I want to learn more about pneumatics. How can you help me?

We invite you to our educational materials section.

We provide there basic information on how to build pneumatic systems.

For those interested, we also conduct training in the field of power pneumatics (PL).

What is the maximum stroke of a pneumatic actuator?

We manufacture actuators in a standard strokes range of 1 to 3000 mm.

Can I order an actuator with a stroke other than available in your online store?

Yes. We manufacture actuators with any stroke in a range from 1 to 3000 mm.

For more information, please contact our sales department.

What should an actuator's diameter be if the pushing force required is X kg?
Theoretical push force [daN] [kG]
Cylinder diameter Air pressure [MPa]
0.30.40.50.60.70.80.91.0
D12 3.94.525.656.797.929.0510.1811.31
D16 6.038.0410.0512.0614.0716.0918.1020.11
D20 9.4212.5615.718.8521.9925.1328.2731.42
D25 14.7219.6324.5429.4234.3639.2744.1749.09
D32 24.1232.1740.2148.2556.2964.3472.3880.42
D40 37.750.262.875.488100.5113125.7
D50 5978.598117137157176196
D63 93.5124155187218249280311
D80 150201251301351402452502
D100 235314392471549628706785
D125 36849061373685998111041227
D160 603804100512061407160818102011
D200 9421257157118852199251328273142
D250 14731963245429453436392744184909
D320 24923322415349845814664574768306

More on the selection of actuators can be found within teaching materials.

How can I adjust an actuator's movement speed?
  1. By using a throttle valve type C screwed directly into an actuator’s connection.
  2. By using a throttle valve type V screwed directly into a distributor valve’s connection.
  3. By using a throttle valve mounted on the air supply line to an actuator’s chamber.
  4. By using noise dampers with adjustable outflow, screwed into the venting outlet of a distributor valve.
What is the maximum operating temperature for a pneumatic actuator?

Actuators manufactured by CPP “PREMA” S.A. can work standardly in ambient temperatures from -20 to +80 °C. This range can be increased to +150 °C after using VITON seals. Devices for working at elevated ambient temperature are marked with “T” at the end of their catalogue numbers (eg 11.016G.0150AT)

What is a rodless actuator?

It is a type of a pneumatic actuator in which the force is transmitted using a carriage moving along the sleeve. The connection between the carriage and the piston can be realized mechanically, magnetically, or by a tendon. It achieves higher movement speeds than linear actuators. When using rodless actuators, attention should be paid to the size of the moments of force causing damage to a moving element.

There is a lot of dust and/or a high humidity in my factory. What actuators should I use?

In such cases, two solutions can be applied (separately or jointly).

You can install actuators with dedicated shields on the pistons to protect the seals and the piston itself from the environment’s negative influence.

You can use SSI series actuators with an additional scraper protecting the piston seal.

Do you restore actuators/valves from other manufacturers?

We do not restore pneumatic or power hydraulic units produced by other companies.

Which valve should I choose for an actutator with a given diameter?
  1. You can find more about the principles of selecting pneumatic units in our educational materials section.
  2. In our online store, after selecting the product you are interested in, we suggest clicking the “Suggested assortment” tab to find matching items.
  3. For more information, please contact our sales department.
What is the difference between a 5/2 valve and a 5/3 valve?

The designations 2/2, 3/2, 4/2, 4/3, 5/2, 5/3, etc. indicate the function of a valve.

The first digit corresponds to the number of input/output paths while the second indicates the number of positions of the flow control element.

For example – 5/3 means that there are five paths (one supply, two receivers and two vents) and three slider positions (left, right and middle).

Each slider position connects different inputs/outputs, thus redirecting the compressed air stream.

More on this topic can be found in the educational materials section.

What do the letters A, B, P mean at the valve supply holes?

These are valve path marks showing the direction of air flow.

Although currently numerals are preferred over letters, you can still come across the old nomenclature.

Currently used designationsLetter designations used in the pastType of connection
1PSupply connection
2, 4A, BWorking connections (output)
3, 5EA, EB (or S, R)Outlet to atmosphere (venting)
12, 14X, YPneumatic control connections
How many valves can I supply from one valve island?

We recommend:

  1. Up to 8 valves on one island with power supplied to one side of the island.
  2. Up to 12 valves on one island with power supplied to both sides of the island.
Is it necessary to install a compressed air lubricator in my machine?

First of all, you should check the technical and operational documentation of a machine. Actuators and distributor valves produced by CPP “PREMA” S.A. have a solid lubricant applied to increase their durability and reliability, so they do not require additional oil mist lubrication.

There are situations that force the medium to be oiled. For example, when a system requires very fast movement or very frequent valve switching. Sometimes the use of a lubricator is required by other devices installed on the same air line.

Remember that if a device is once powered with oiled air, then oiling should always be applied. This is because the solid lubricant applied during the production process is washed out by the oil from a lubricator.

How to remotely check the pressure in a system? What is a "pneumoelectric relay"?

The simplest way is to connect a pneumoelectric relay.

Its task is to convert a pneumatic signal into a stepwise electric signal. It reacts to changes in the value of compressed air pressure.

Depending on the way  the electric contacts are connected, the relay can work in two ways:
-closing the contacts when the pressure value reaches or exceeds the set value;
-opening the contacts when the pressure value reaches or exceeds the set value.

What kind of hoses should I use in my machine: polyurethane or reinforced?

It depends on environmental parameters and working conditions, such as installation pressure or external temperature.

Until recently, the most commonly used were hoses made of polyethylene (PE).

Currently, thanks to better strength properties, polyurethane hoses (PU) are more common. This material is softer and more elastic, which makes it lay better and has a smaller bending radius. Polyamide hoses have the best resistance among flexible hoses.

However, in cases requiring very high resistance to trauma, copper pipes are used.

The best resistance among flexible hoses is provided by polyamide hoses.

However, in cases requiring very high impact resistance, copper tubes are used.

Strength parameters for different types of materials can be found in our catalogue, section 10 – “Fittings and Accessories”.

Do CPP "PREMA" S.A.'s products comply with the ATEX directive?

Yes. We have a line of products compliant with the ATEX directive’s requirements and certified by the appropriate institutions.

We invite you to familiarize yourself with our offer dedicated to the mining and energy industry.

Can I buy spare parts for your products?

Yes. For most products manufactured by CPP “PREMA” S.A., it is possible to buy repair kits.

These include seals and easily replaceable elements that may wear out during normal operation.

Such kits are available for:
– actuators,
– distributor valves,
– compressed air preparation elements.

You can buy them at our online store or directly at the headquarters of our company.

More information on this topic can be found in the catalogue.
If in doubt, please contact our sales department.