Unpacking the RO Elements (Manual)

May 29, 2021


Concerning the proper storage of RO elements before unpacking, please refer to section TMM-500: Storage of RO Element Outside of the Pressure Vessel. Toray recommends that new elements are stored in their original packaging until the products are ready to be loaded into the pressure vessels just before system start-up. Keeping the RO elements in its original packaging will help prevent any foreign debris from coming into contact with the RO element and affecting performance.

1.    Open element boxes, and remove RO elements and accessories. The accessories are separately packaged in small plastic bags inside the element box. Handle the element with care to avoid damage. Place empty boxes aside.
2.    Prepare the necessary parts, as shown in Table 1.

Table 1
Parts Required Quantity
Brine seals One per element
O-rings 4 pieces per element
Permeate port adaptor (open)* One or two per pressure vessel
Permeate blind plug adaptor (solid)** One per pressure vessel (optional)
Interconnectors (qty. of elements) − (qty. of pressure vessels)
*The permeate port adaptor is not supplied by Toray. Please contact the engineering company to inquire about or obtain the part. **End port pressure vessel requires a permeate blind plug adaptor.

3.    If required, assemble interconnectors with supplied o-rings carefully to avoid any scratches. Use glycerine as a lubricant. Keep assembled interconnectors in a clean place until inserting into permeate tubes (Figure 1).
Figure 1

4.    Safety considerations before opening the packing bags and removing the RO element:

DANGER. When shipped from Toray, new elements are packaged in approximately 0.5–1.0 wt% sodium bisulfite solution, or sodium chloride solution with an oxygen scavenger. Do not ingest these solutions, and handling them may irritate the eyes and skin. Personal protective equipment is required when handling. Please refer to the safety data sheet (SDS) for sodium bisulfite for additional handling instructions and information.
The element shell is FRP (Fiber Reinforced Plastic). Beware of glass fiber strands and use correct safety equipment.

5.    Cut open the element's shipping bag and prepare for insertion, following illustrations provided below.

INSTRUCTION. Handle elements with care. Avoid dropping on hard surfaces. Use clean personal protective equipment (e.g., gloves, goggles) and avoid contamination of the element surfaces.
USEFUL TIP. Toray elements indicate a flow direction arrow on the element label to ensure that the brine seal is oriented correctly during installation. The arrow does not imply a mandatory installation direction – the element can be installed either way. The important point is correctly installing the brine seal relative to the direction of brine flow (see illustrations below).

Sample procedure A: removing the bag from an element packaged with polystyrene foam end-caps.  
PPE Required!

Cut open the polybag
at the top end
Push the polybag down
and leave the upper Styrofoam cap
in place for Step 3.
Flip the element onto the open end
and stand it on the styrofoam cap.
Remove the top foam cap
together with the polybag.

USEFUL TIP. The polybags are made of unique oxygen barrier materials for maintaining the lifetime of the oxygen scavenger packaged inside the bag. If the bags are carefully cut open at one end, they can be stored and reused later if any RO elements need to be conserved or shipped. It is also a good idea to retain some packaging boxes if an element needs to be stored.
INSTRUCTION. Handle the element with care when standing it on the floor to avoid breaking the oxygen scavenger sachet on the element's feed side. The best recommendation is to lay the element on a table and cut open the polybag.

Sample procedure B: removing the bag from an element packaged without polystyrene foam end-caps.
Push the outer polybag down
and remove the element still
inside the inner polybag.
Cut open the inner polybag
at the top end.
Push the inner polybag down. Remove the element
from the inner polybag.

The data and information contained in this document are based upon rigorous technical testing by Toray, and is to the best of our knowledge reliable. Toray cannot control design and operating conditions, and consequently Toray does not assume any liability for results obtained or damage incurred through the application of the information provided herein. No liability, warranty or guarantee of final product performance by Toray is implied by the information provided in this document.
This manual supersedes all previous versions. Technical modification of products or production technology may necessitate changes to information in this manual without prior notice. Please verify that your version of the manual is the latest version available by either contacting Toray, or checking online at www.water.toray.

This content is extracted from Toray’s “Toray RO Handling Manual (Version. Apr. 2021)” (the Manual). Please refer to other contents stated in the Manual. When using this content, please read the Terms and Conditions of Use stated in the manual and agree to them before using this content.