Gents,
How can i calculate the estimated discharge pressure of a positive disp. pump at a given flow only. The curves are not avialible, the vendor does not exist any more and no data at all for this pump. The pump was not in use and we will connect it to new process and need to estimate the...
Gents,
We are planning to select a PTFE single diapfragm metring pump to pump gasoline. The pump will opertate at 50 meters diff. head and 1.2 m3/h flow. It pumps from the tank buttom and the stream contains solid particles, does this pump type fit the requirmentrs? Does PTFE handles such a...
Gents,
I do not know the defference between the torsional and lateral critical speeds ? when do we need to consider either? for new draft forced fan, do we need to do such an analysis as recommended by the API? can anybody explain the ifference in a simple way??
Gents,
I am in the process to develop a swapping criteria for the stand by pump. When to swap , how and what frequency is required. I know it is not good to keep the s/b pump idle and it is not good to keep on starting it. So we are in between......but what to do????
the objective is to ensure...
Gents,
If the centrifugal pump operates at different fluid , hence viscosity is different, does the head remains the same assuming no change to the system dynamics or resistance , thus the seystem curve remains the same too??? i know for a lighter fluid the discharge pressure reduces at the pump...
Gents,
we are having lots of problems with the existing single seal for the tar bottom pumps in steam cracker plant. it is pusher type single seal plan 11 (changed to 32) , the seal faces hang up , O'ring got damaged .....etc..
i am planning to upgrade it to dual seal plan 32/62 any bodey has...
Gents,
we are having lots of problems with the existing single seal for the tar bottom pumps in steam cracker plant. it is pusher type single seal plan 11 (changed to 32) , the seal faces hang up , O'ring got damaged .....etc..
i am planning to upgrade it to dual seal plan 32/62 any bodey has...
Gents,
I am looking for a material that has the best abrasive wear risistance for pump casing. it is horizantal duble suction volute pump for benzene service. the stream has solid particles and causing the casing/impeller to errod due to abrassive wear. Any idea where can i find a refernce for...
Gents,
I am trying to find a vendor who can provide a rotatry PD pump for water/gasoline service. the pump spck. is 1.5 m3/h at 58 meters head. Is this the recomended pump type for such parameters? pls. let me know what vendors are there.
upm
gents,
Any hint how can i calculate the volumatric eff. for a multi stages recip. compressor? it is 3 stages comp. pumping pure ethylene from 0.95 bara to 37bara (-90 deg c to 150 deg c). i know the calcs will not be accutrate as we need the detailed dimensions and clearances but as an estimate...
Gents,
i am planing to trim an impeller and work out the new dia. to meet the process requirments. i red about vane under filing to increase the flow and reduce the vane pass freq. can uny body help how we do this? how it improves the impeller performance.
i am trming the impeller for the...
Gents,
any body has an experince on ceramic coating on duble suction pump impeller? this is to avoid the errosion wear we are having in the service. if so, do i need to coat the impeller and the wearing rings? if yes, then i need to work out the new running clearances as the thermal expansion is...
Gents,
we have a duble suction pump for tar service (dirty) fitted with ductile iron material. last inspection , the impeller were erroded very badly and pin holes were on the wearing ring location. the inlet blad tips are toptaly erroded and the discharge blade tips are erroded as well.
this...
Gents,
I need your advice for the recommended pump impeller material for duble suction between bearings tar pumps. the existing material is Ductil Iron and the inspection shows sever pin holes on the impeller blades and wearing ring areas. errosion marks on the blade tips (discharge) and sever...
upm
Gents,
i know the risk of carrying over liquid to comressors and what damage does it cause (and even explosion). from technical point, the compresor will act as pump and try to cpmpress liquid, but any body can explain how does this take place? is it due to heavier liquid weight thatn gas...
Gents,
i know the risk of carrying over liquid to comressors and what damage does it cause (and even explosion). from technical point, the compresor will act as pump and try to cpmpress liquid, but any body can explain how does this take place? is it due to heavier liquid weight thatn gas where...
Gents,
how do i know what is the lubrication physical proporties limits? i.e. VI,poir point, TAN.....etc? the oil vendor will only provide the data sheet but not the speck. Furthermore, the metal ppm in the oil is the ky as well and all vendors will set 0 ppm (Ti,Fe,Si...)
i have a problem...
Gents,
i am trying to select a pump which can operate from nigative suction pressure to positive suction pressure. I know the range is wide but it is our process requirnments? a part from self priming pump, is ther any alternativs?
upm
