Plate Types - Riello SP20-DN32 Manuel D'utilisation Et D'entretien

rences between the two circuits during testing should never
be higher than the maximum allowable differential pressure.
• If a leak occurs, lower the pressure then retighten the nuts
and repeat the test. If the leak persists, check the gaskets
and plates for signs of wear, damage or dirt. If necessary,
replace the gaskets.

5.9 - Plate types

The letter indicates the plate type:
A = HIGH EFFICIENCY plate with wide chevron pattern
B = LOW DELTA P plate with narrow chevron pattern
A
B
PORT HOLES FOR PLATES ON SINGLE-PASS UNITS
ODD EVEN
DESCRIPTION
INITIAL INTERMEDIATE
PARALLEL
FLOW
CODE
1 2 3 4 1 2 3 4
PORT HOLES POSITION FOR DEVIATION PLATE
PORT HOLES POSITION FOR DEVIATION PLATE
1,2,4 1,3,4 1,2,3 2,3,4 1,4
Drilling the collectors. Code which indicates the position and the open or
closed status of the collectors.
1234 = Open 0 = Closed
e.g.: 1204: indicates that porthole No. 3 is closed.
ENGLISH
ODD ODD PORT HOLES
INTERMEDIATE FINAL POSITION
1 2 3 4 0
2,3 3 3
49
EN
PASSING
HOLES
BLIND
HOLES