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I have an outdoor application (-30C) design that requires a valve to handle high ph leachate until the liquid freezes. The solid material that will be stored has a SG of ~1.2 and ph in the 12-13 range once dissolved. Rainfall will be the medium that dissolves the solid so the resulting ph will...

We have had several failures in our bale press and after some study the loading can be simplified as follows: Visualize a rectangular plate with a hole in the center. The plate is held down in the center by one nut (super bolt) in our case. There is uniform loading (not necessarily equal on...

I see ten inch 150# valves being modified and something doesn't seem correct but I have not been able to find anything in the code which says this can not be done. The ball valves are used as blow valves and the ball sticks with gummy material. They drill a hole in the side of the valve body...

Can someone please give me some information on how to calculate the SCFM for a compressor? Flow - 1100 acfm Pressure - 100 psig Air Temp - 110 F Altitude - 1600 ft A formula and sample calculation would be great. Thanks in advance

I'm looking for an Excel spreadsheet that gives me the air density at different temperatures and altitudes. The project involves a cooling tower heat load and the temperature range is from 75F - 115F at an altitude of 1640 ft Thanks in advance.

Does anyone have a Excel spreadsheet or can you provide the formulas to determine the air densities at different temperatures and altitudes? This is a cooling tower application and the altitude is 1640 ft. My calculations revolve around temperatures in the 75F - 125F range. Any help will be...

I am doing some wind load calculations using the Canadian Building Code, The formula for wind load is striaght forward but I can't find the value for exposure factor used in the formula. Does anyone know where I can get this information or where I can find some sample calculations or an Excel...

Does anyone have an Excel Spreadsheet that can be used to perform "Rate of Return" calculations for capital projects? Or know where I can go to get one? Thanks in advance!

We concentrate the solids from 35% to 65% before it gets burnt in the recovery boiler. Steam is used on the shell side to evaporate the water. Last week we noticed about 20 tubes in one section (not in front of the steam inlet) had collapsed. Does anyone have any ideas or know whare I can get...

I need to design a tank for ~ 3000 lpm (792 usgpm)outflow capacity. The pumps will remove water continiously and makeup water will be added to the tanks as required to maintain level. Does anyone know how big the tank should be so I have sufficient retention time. Where to find the info would...

I've visited sites where people were offering or giving links to sites where Excel spreadsheets were available to assist people who are doing friction loss calculations. Now that I need one I can' remember where to go. Any assistance would be appreciated

I've visited sites where people were offering or giving links to sites where Excel spreadsheets were available to assist people who are doing friction loss calculations. Now that I need one I can' remember where to go. Assistance would be appreciated.

I work at a pulp mill in Saskatchewan Canada and we have been struggling with downtime due to bolt failures. Case Study The bolts being used are Gr 8, 5/8" X 2" Lg (CSH*C58-2P, UNC) and we use lock nuts. (LNS9C58P, UNC) (1) - The bolts secure the pans to a chain links and the...

I do not have a copy of the API Standard for sizing tank vents and have not been able to find any information on line. My problem is I have a closed tank which is vented inside the building. The fluid is not flamable but could give off H2S gas. I would like to know how much air I should...

We have a potential hydrogen suflide problem in a couple of tanks and I would like to know if anyone has a formula to determine how much air should be exhausted from each tank. The tanks in question have covers but they are vented inside a building. I would like to collect the gas off both...

We manufacture pulp for papermaking. The first step in the process involves chipping logs and storing the chips in a massive A-Frame building. I would estimate the building footprint is 100 ft by 300 ft long. The A-Frame height is about 100 ft. Wood chips kept in storage tend to give off heat...

We use evaporators to concentrate organic material so it can be burnt in the boiler. Evaporator tube fouling is a constant problem & we use high pressure water (10,000 - 15,000 psi) to clean the tubes. I'm concerned the high pressure blast may be damaging the evaporator tube surfaces, which...

I am a mechanical engineer with an electrical problem. The power calculation using amperage, voltage, motor power factor and efficiency when combined with pressure readings on the pump performance curve gives a flow whiich is 20% higher (5000 GPM) than other measurements indicate. The overall...

I have a question concerning control valve sizing (pressure drop assumptions) for a heat exchanger. It comes down to what pressure drop do you assume. The HX manufacturer says they don't size valves. Here is what I think should be done. (1) - Determine the condensate loading and the pressure...