Hi folks, I haven't had any luck finding a free-standing PID tmperature controller (actuates a modulating cooling water flow valve) that can be located in a hazardous location. The operators will want to adjust the setpoint at will, and the non-XP control room is some distance away. Quite...
Looking for a lab-scale version of a high shear in-line disperser or mixer, flowrate less than 1 gpm. Most models are much bigger than this. Anyone have any suggestions? TIA
Anyone have a good source to estimate pressure drop of air (atmospheric pressure) flowing through pipes (3" to 6" diam). My flowrates are only about 10-15 SCFM. TIA
I'm spec'ing out a 5000-gal storage tank for a solution that is essentially 9wt% aqueous ammonia. Perry's says that for 9.5% NH3 on a hot day (at 90F) total vapor pressure can reach almost 4psia.
Sizing the conservation vent is not a problem, I'll go with Groth or Protectoseal, but my plans...
Hi, we're desigining a 5000 gal SS atmospheric storage tank for non-flammable liquid. Well be filling it at about 100 gpm and draining it at about 30 gpm. I simply need a breather vent to let the air out when filling, and let the air in when draining (its a little smelly so we'll be venting it...
Hi - this seems like it coule be an extremely useful new forum!
My application is a simple one - 5000 gal SS atmospheric storage tank for non-flammable liquid. Well be filling it at about 100 gpm and draining it at about 30 gpm. I simply need a breather vent to let the air out when filling, and...
Dows anyone have or know of any spreadsheets for calculating relief valve size for liquid service, or where to find information on performing the calculation? TIA!
Fran McConville
Hi. I'm just looking for some ballpark figures for the relative cost of 304SS, 316SS, and Hastelloy for manufacturing chemical processing equipment and vessels etc. Just rough numbers...TIA!
Fran McConville
Hi, we're trying to control a modulating steam valve to a using a controller that seems to have four tunable terms. Here are the current values:
PbH 16.6
Intr 65
Rset 50
Driv OFF
Question is, what are the four terms? I recognize proportional band, integral, and derivative, but what's rset...
This is pretty basic stuff, but I could use a sanity check if anyone has the time. I'm calculating vapor concetration in the headspace of a tank of solvent (MW=53.1, bp=78C, vp=83torr) at ambient temperature. At atm. pressure, the mole fraction should simply be 83/760, and using PV=nRT I can...
Hi we're building a rectangular 2ndary containment for a roughly 700 gal system that needs to be 18" high and 10ft L x 5ft W. Is there a minimum wall thickness required (I was thinking only about 4" since this thing will only be used in an absolute emergency and it only needs to hold the liquid...
Hello, we've got an air cooler that consists of a cold water coil and a blower. The only place we can locate the coil is upstream (return, or suction side) of the fan, so I'm a bit concerned about corrosion if condensation droplets reach the fan. But my first concern is draining the condensate...
Hi. I've been asked to look into converting a 10,000 gal underground storage tank for use with a flammable acrylic monomer with a freezing point of 16C. The tank was designed for much lower freezing liquids - this monomer will freeze in place here in New England.
Does anyone have any...
Hi. I can't get my hands on a copy of the ANSI standards - can anyone supply this info? I need to know MAWP and burst pressure for 3/4" Sch160 304SS pipe. A copy of the applicable page would be tremendous!
Thanks!
