short pattern & venturi pattern plug valve

[arash807]

Dear members

what are the differences between short pattern and venturi pattern plug valves?

regards
Arash

 

[pennpiper]

Go here (

http://scvvalve.com/Pressure Balance Lubricated Plug Valves.pdf)and

you can see some specific details of the three different types of Plug Valves.
Short Pattern - Page 11
Regular Pattern - Page 13
Venturi Pattern - Page 15

For this Manufacturer:
The Short Pattern appear to be limited to 2" to 6"
The Regular Pattern appears to be from 6" to 12"
The Venturi Pattern appears to be 15" to 36"

Size for size the basic difference in the Face-to-Face dimension is the change to the angle of the inlet and outlet which in turn affects an increased or decreased Flow Restriction.


prognosis: Lead or Lag

 

[arash807]

pennpiper

First of all thanks for your reply.
I know their face to face are not equal.in terms of pressure drop and flow capacity,is there any difference?

regards
Arash