Thanks. I'm trying to stay away from plunger pumps due to packing and leaks. I'll take a look into the triplex membrane/diaphragm pump as I have never used before.
Thanks very much in advance for your assistance. Need to find a pump for application below.
Suction pressure= -2 psig (see note below).
Suction Temp= 175°F
Discharge Pressure= 1200 psig
Flow= 15 gpm
Fluid= EG/Water mix (75% Ethylene glycol and 25% Water).
Viscosity= 1.5 cP
Note: Pump takes...
We use (standard): Alarm= 0,4 ips and Shutdown= 0,6 ips. There is 1 second delay in shutdown to avoid false trips ( instrumentation).
I'll report here any other finding. It may take some time until we confirmed it can be a good practice in the long term.
Thanks for all the inputs.
Yes. Two cases.
First case was subsynchronous vibration and 1st stage was found with broken wear rings and some parts got stuck (flow restriction). Pump head dropped 300 psig so it was a good call.
Second case vibration suddenly increased (jumped) and at same time pump head dropped 200 psig...
That's the dilemma. Criteria now used is to pull out the pump only when there is a performance change (flow or head) or fast increase of vibration to a very high level, and a site inspection check confirming need for removal. All typical wear out components will be replaced (intended by design)...
Thanks. Yes, so far it is working fine and economics are good BUT this is a short term conclusion. Idea is to safely extend unit service life by keeping "Upper or Surface" equipment/structure vibration below 0.1 ips. It is really compensating (masking?) pump shaft deflection caused by down pump...
Is balancing correction an acceptable practice to extend motor-pump service life when upper vibration increase is caused by down pump components wear?
On our vertical turbine pumps (Filtered water @ 80°F, 15 stages, 3600 rpm, 1000 HP, 30000 BPD, TDH= 1500 psi) we check motor uncoupled...
I'd appreciate assistance where in the codes I can find a table with recommended spacing (gap or distance) between flanges faces. The particular application I have this time is for a 6"-600# flange connection using 2Xflexitallic gaskets and an orifice plate (0.130" thickness). Temperature is...
