Our most frequent aksed questions

Can you deliver orders on a FOB China basis?

Yes, we can, but we prefer and always recommend to use FCA, CFR/CIF and DAP incoterms for smoother and more cost effective deliveries; we can also help with freight organization.

What is the minimal order quantity(MOQ)?

The MOQ is 1x full pallet, 600kg (30x 20kg).

Can you supply the relevant documentation?

Yes, we can provide most documentation including Certificates of Analysis Conformance, Insurance, Origin, and other export documents where required.

What is the average lead time?

For samples, the lead time is about 7 days. For mass production, the lead time is 20.30 days after receiving the deposit payment. The lead times become effective when we have received your deposit, and we have your final approval for your products. lf our lead times do not work with your deadline, please go over your requirements with your sale. In all cases we will try to accommodate your needs. In most cases we are able to do so.

What kinds of payment methods do you accept?

You can make the payment to our bank account, Western Union or PayPal: 30% deposit in advance, 70% before shipment.

Can the sieve be regenerated?

Yes, we can regenerate used molecular sieve. Contact us to discuss a tailored-solution for your application.

How long can the product be stored?

Shelf life of an unopened drum, properly stored, is warranted for 5 years.ln practice it can remain fresh indefinitely as long as the drum remains sealed and properly stored. The sieve is chemically stable, and does not break down over time in storage. Once a drum is opened, the materials hould be consumed quickly. lf a partial drum needs to be stored for later use, it is recommended to close the bag.

How do you optimize the life of the molecular sieve?

The water capacity is the percent by weight that the sieve adsorbs. At equilibrium, the adsorption is basically driven to completion to determine the absolute maximum amount of potential adsorption. This is most often used as a general baseline measure of the sieve's quality and ability to adsorb water. Dynamic capacity is the working capacity that is expected from the sieve to avoid breakthrough of water in an actual process. The design simulation determines this capacity based upon the feed and regeneration stream compositions and conditions, and the water concentration, as well as the concentration of other contaminants. lt involves not only the equililbrium capacity, but calculation of the mass transfer zone, effects of other contaminants, and aging of the sieve over time. All of these factors contribute to the difference between achievable water adsorption in service and the theoretical maximum water loading for the sieve.

How should the sieve be handled, stored, etc.?

Stored sealed in factory packaging until ready for use. lt is recommended to handle the material in a climate-controlled environment, ideally with lowest %rH possible to reduce the moisture pickup from the ambient air. Sieve is a powerful desiccant and will quickly adsorb water from the air, and so minimizing exposure during sieve bed loading is crucial to minimizeN2 capacity loss and thus maximize performance in O2 concentrators.

What are the most important things to do when preparing to reload the molecular sieve beds?

Make sure all bed loading materials, supplies, equipment, and manpower are accounted for and ready to go ahead of the start date.Keep the sieve as dry as possible prior to loading by storing appropriately. In the field, stage the product for each bed so that all the materials to be loaded in a bed are present and ready to be loaded. Do not place packaging directly on the ground (keep on pallets) and cover with tarps when needed to keep packaging and the sieve dry. Maintained sealed packaging until time to load into the vessel or hopper (when applicable). Avoid loading in the rain whenever possible. Sieve readily adsorbs water from the air and the wetter the environment, the more water the sieve will adsorb during the loading.

How do l know when it is time to reload and is a breakthrough test required?

If there are changes in the normal dewpoint trendlines or signs of increasing dewpoints during normal adsorption cycles, it may be indication that water breakthrough is occurring, and the sieve may soon require change out. Other indicators include high or increasing pressure drop across the sieve beds, in-line strainers, and heat exchangers, changes in normal flow rates and patterns, and increased difficulty maintaining consistent flow, temperature, or pressure. In many cases performance history together with the current performance and a design simulation run will provide a good indication of expected remaining life of the sieve. When additional or more accurate data is needed to predict sieve life, a breakthrough test can be performed on the sieve beds or on the weakest bed (if there is a known weaker bed).

How do l streamline the sieve reloading process?

Schedule the change out well ahead of time, preferably during an already scheduled shut down or turn around. Order and have all needed products and supplies on site well ahead of time to avoid any delays. Make sure all contractors, plant personnel, and equipment will be ready to begin the morning of the scheduled start, with any necessary orientation, training, etc.completed in advance. Follow the guidelines and recommendations for unloading and reloading the sieve to streamline the process and avoid delays. Have contingency plans in place should there be weather or unexpected delays that occur.

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