FAQ CDS extractor tube

This FAQ contains frequently asked questions about the CDS extractor tube that is installed in the VARIBOX FC. This FAQ is divided into four parts: the characteristics of the CDS extractor tube, the availability, the CDS counter coupler and the connection of the CDS counter coupler to the CDS extractor tube.

Characteristics of the CDS extractor tube

What is a CDS extractor tube?
A CDS extractor tube is a tube in the VARIBOX FC that reaches the lowest point of the inner container. A counter coupler can be connected to the top of the CDS extractor tube. The CDS extractor tube is an option on the VARIBOX FC that allows product to be pumped out of the VARIBOX without opening the VARIBOX FC. This makes safe working with chemicals possible, and fumes and product cannot be escape from the VARIBOX FC.
How does the CDS extractor tube work?
A leak-tight connection is established when connecting the CDS counter coupler. At the same time, the CDS extractor tube and the CDS counter coupler are opened. Product can now flow, and air can enter. Fumes and product cannot escape.
How do I connect a CDS extractor tube?
To connect the VARIBOX FC with a CDS extractor tube, a CDS counter coupler with a hose attached to an installation will be used. Both the CDS extractor tube and the CDS counter coupler automatically close when disconnecting. By this way you cannot forget to close the VARIBOX FC and no product can flow back from the pump installation.
Can fumes and product escape when using the CDS extractor tube?
No, the VARIBOX FC with a CDS extractor tube forms a closed system. When disconnecting, the CDS counter coupler as well as the CDS extractor tube automatically close. After disconnection there can be still some moist on the CDS extractor tube and CDS counter coupler, avoid contact with these parts.
Do I have to open the screwcap to vent?
No, the CDS extractor tube has an automatic aeration. This is advantageous because the screwcap remains closed and fumes cannot escape.
How long will it take to pump out all the product of the VARIBOX FC with the CDS extractor tube?
Normally it will take approximately 50 minutes to empty a VARIBOX FC with 1000 litres of product with a CDS extractor tube. This depends on the viscosity of the product and the capacity of the pump installation.
Does the CDS extractor tube have a foot valve?
The CDS extractor tube doesn’t have a foot valve. When the VARIBOX FC with a CDS extractor tube is not used for a longer period, the product level in the CDS extractor tube can gradually drop. When again switching on the pump there is a change that air will be pumped first
How long does the CDS extractor tube last?
To ensure the safety of the VARIBOX FC with CDS extractor tube, it is recommended to replace the CDS extractor tube every year. Inspect the CDS extractor tube regularly for possible damage and replace if necessary.
How much product is left after emptying?
Just a little bit of product remains in de VARIBOX FC, because the CDS extractor tube is placed in the lowest point of the inner container. Because of the low residue, handling and transporting VARIBOX FC is much safer. After emptying, approximately 0.1 litres remain in the VARIBOX FC. About 0.4 litres remain in the CDS extractor tube itself. These quantities are based on water and will vary per chemical product.
To which products is the CDS extractor tube resistant?
The CDS extractor tube has been developed for use with chemicals. The CDS extractor tube is resistant to most chemicals, but it is very important to choose the correct version. If you have specific questions about chemical resistance, please feel free to contact us.
Which versions of CDS extractor tube are available for the VARIBOX FC?
There are two versions CDS extractor tube: EPDM for the VARIBOX FC in EPDM version and Aflas for the VARIBOX FC in Viton version. The EPDM version has a stainless-steel spring. The Aflas (VARIBOX FC Viton) version has a Hastelloy spring. Tube and housing are made of polyethylene. If you have specific questions about chemical resistance, contact us.

Availability CDS Extractor tube

Where can I order the CDS extractor tube and/or the CDS counter coupler?
The CDS extractor tube and the CDS counter coupler are available at RPC Promens. You can use the VARIBOX order form. Please contact our customer service for this form. You can mail to info@varibox-ibc.com or you can contact us by telephone on the number +31 570 660 706. Besides that, you also can order the CDS extractor tube and CDS counter coupler at TriSure, see: https://www.tri-sure.com/).

The CDS counter coupler

How do I see a difference between an EPDM or Aflas/Viton counter coupler?
It is important for safe use of the VARIBOX FC to use an EPDM CDS counter coupler on an EPDM CDS extractor tube. And on a Aflas/Viton CDS extractor pipe, only the Aflas/Viton CDS counter coupler must be used. The difference between an EPDM or Aflas/Viton counter coupler is in the colours of both counter couplers. The EPDM CDS counter coupler has a red core (dot in the middle) and the Aflas/Viton version has a natural (white) core (dot in the middle).
How can I see if the CDS counter coupler is worn?
The CDS counter coupler can be damaged. For example, the part sliding over the CDS extractor tube can be damaged, or the sealing surface may be damaged. If so, the CDS counter coupler must be replaced. Besides that, the CDS counter coupler can also be damaged due to chemical attack. Therefore, it is important to regularly check the CDS counter coupler.
What is the lifetime of a CDS counter coupler?
The expected lifetime of the CDS counter coupler is one year. Inspect the CDS counter coupler regularly (i.e., annually or earlier if necessary) and replace if necessary. The rate of chemical attack is highly dependent on the product, its concentration and temperature.
What is the metal bracket on the CDS counter coupler?
The metal bracket secures the position of the CDS counter coupler on the CDS extractor tube. If the metal bracket is not clipped underneath the CDS extractor tube, air can enter the system which can lead to faults in the pumping system.

Connecting the CDS counter coupler

How do I connect the CDS counter coupler to the CDS extractor tube?
Make sure that the handle of the CDS counter coupler is inclined upwards. Slide the CDS counter coupler completely over the CDS extractor tube. Turn and clip the metal bracket underneath the edge of the CDS extractor tube. Push the handle of the CDS counter coupler downwards until it clicks in position. The CDS extractor pipe is now connected. And the product can be pumped out.
Can I disconnect the counter coupler at any time?
No, pay attention to overpressure in the VARIBOX FC. There is a risk of leakage when disconnecting in case of overpressure. When the VARIBOX FC is under internal pressure, the pressure must be released first. This can be done by switching on the pump or by opening the screwcap. Make sure to wear personal protection.
How should the extractor hose be connected to the counter coupler?
The extractor hose must be flexible to avoid excessive force on the CDS counter coupler. It is important that the hose is attached at 180 ° to the handle.

More information

Do you have any other specific questions regarding the CDS extractor tube in the VARIBOX FC or do you want additional information please feel free to contact us by info@varibox-ibc.com or you can call us on (+31) 0570-660-706