Results 1 to 7 of 7
-
19-08-2011, 11:18 AM #1
Low pressure drop non return valves screw compressor
Has anyone a recommendation for a proven suction check valve on a screw compressor.
Needs to have smallest possible pressure drop across it.
Sizes approx 125-300 mm in size.
Can also be a stop check valve
Thanks Ranger
-
22-08-2011, 06:35 AM #2
Re: Low pressure drop non return valves screw compressor
Hi Ranger1,
generally have those double plate spring loaded things, but they can generate 1 degree loss at super low suction. Concider a stop check flapper vav straight after the compressor in discharge line between comp and separator.
magoo
-
22-08-2011, 08:59 PM #3
Re: Low pressure drop non return valves screw compressor
If there is no escape from the pressure separator to the intake valve is OK.
-
27-08-2011, 01:35 AM #4
Re: Low pressure drop non return valves screw compressor
Hi Ranger.
how did you get on with check vav.
magoo
-
27-08-2011, 03:19 AM #5
Re: Low pressure drop non return valves screw compressor
Magoo,
Just curious really as everyone talks about penalties/efficiency etc etc.
You/I know about discharge check benefits but only a few companies doing it like Bitzer
that I know of.
Have seen a few with I think Grasso stop/checks, but don't know how good they are
compared to Duo checks.
-
29-08-2011, 01:32 AM #6
Re: Low pressure drop non return valves screw compressor
Hi Ranger,
The duo stop checks are reasonable high pd on suction add the strainer and several degree losses.
I have had a Bitzer discharge check let go, the shaft separated from head [ a friction fit ] and sucked the spring back into screws, not a pretty site.
-
29-08-2011, 09:25 AM #7
Re: Low pressure drop non return valves screw compressor
To make progress is never good enough, I want to do better and better and better