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I've used butterfly valves on large pump suction lines many times, due to cost contrainst driving it that way. If they are an isolation valve for hazardous service or a service that crystallizes when cooled, preventing the valve from re-seating properly, that is the only problem I'd have with...

I dont believe filtration would be possible. By holding combustion at the correct conditions in a direct thermal oxidiser for example, you will not form dioxins and furans. Contact a company called Megtec for more info Mark McLean

Hi Can anyone recommend a supplier for a small (1600 tpa contained Cu) CuSO4 crystallization plant. So far I have contacted Messo. Thanks Mark McLean

We are involved in a small LNG storage and tanker loading facility and need to review the likelihood of rollover in the tanks. Are there any guidelines to this phenomenon? The tanks in question will be vacuum insulated tanks (VIT’s). The tanks will be approximately 5 m diameter and 36 m long...

To only have 3 ft of NPSHa (seems very low) you must have a very high vapour pressure, or no relative suction level, or very high sucion line losses, or a combination of these. A recycle into the suction line is only going to increase your suction line losses, making the NPSHa worse. Can the...

In my opinion check valves in slurry service are almost a waste of time. Can your budget accommodate actuated discharge on/off valves and logic to close the valves when the pump stops? Mark McLean WorleyParsons

5 minutes seems quite conservative. I take it the column sump discharges to a pump suction? I have used 3 minutes (minimum) from the NLL to empty before, based on the normal forward flow. This crieria was derived by some very experienced engineers on a project I worked on. Mark McLean...

As stated by bimir, the presure needs to be reduced until you reach the vapour pressure of the solution, at which point it will start boil. This dictates the pessure you need to operate at. You need to maintain the solution at the bubble point. Perry has vapour pressure data for water at given...

Your question s quite general but, IX vessels don't need to be indoors, unless there is a specific requirement for winterisation. Layout depends on your flow and No. of vessles. i.e. is the flow high, meaning that you require parallel flow trains? If so, several rows of normally three (lead...

We have a good chance of being awarded a project to replace their Cons and Tailings leach tanks. They have had a lot of liner failures on these tanks with the current Corrocoat linings. They are after proven lining system that will last 5 years plus in the aggressive leaching environment, which...

Thanks for you help everyone Griffengm, we are using air diaphragm pumps in other areas of the plant design, so may consider them for this duty. Thanks Mark McLean

We are interested in a non metallic, small submerged pump for pumping out the contents of a HDPE lined firewater dump pond from large SX plant. The flow and head requirement would be approx 50 m3/h and 40 m. We envisage that the pump will be located in a large HDPE pipe, submerged in the pond...

We are interested in a non metallic, small submerged pump for pumping out the contents of a firewater dump pond from large SX plant. The flow and head requirement would be approx 50 m3/h and 40 m. We envisage that the pump will be located in a large HDPE pipe, submerged in the pond. This is to...

We are interested in a non metallic, small submerged pump for pumping out the contents of a HDPE lined firewater dump pond from large SX plant. The flow and head requirement would be approx 50 m3/h and 40 m. We envisage that the pump will be located in a large HDPE pipe, submerged in the pond...

Roker Keep it simple. Without seeing it I'd say, 30” O/H line teeing into the centre of a 30 “, or smaller, manifold with 10 “ lines coming off it to the nozzles. Consider provision for butterfly valves or orifice plates on the cooler outlet lines to equalise flow if required. Often the...

This is analogous to chlorinating a saltwater swimming pool, except yours is a continuos process. If the system goes out of wack too much and the chlorine conc. drops, it can be a pain to get it back into line. Obviously the consequences in your case are far more catastrophic. I would keep the...

Torricelli I was chasing steam injectors (or spargers) not ejectors, but thanks anyway.

I agree with Steve. Consider the worst-case pump in flow rate, and emergency and thermal venting requirements, considering the most volatile component in the tank. The difference in vent size may be minimal between worst and best cases. Cheers Mark

Thanks for all your help guys. Isn’t this website a great resource! It is inline steam injection we are after and we may consider designing our own. For anyone else out there, this site has quite a good basic design guide. http://www.spiraxsarco.com/learn/ Cheers Mark

Hi Engineers We are wanting to inject approx. 3 tph of 3.5barg (before control valve) steam into an approx. 470 m3/h solution @ 65 to 70 oC. Spirax Sarco is the only supplier of steam injectors that comes to mind, but I don’t know if they supply them that big. I guess multiple parallel units is...