R274-R274N-0576 datasheet(4/8 Pages) GIACOMINI

4 / 8 page

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Valve opening diagram

REFERENCE

IN THE GRAPHIC

STEM ANGLE

OPENING

PERCENTAGE

ACTION

0°÷15°

100 %

SOURCE 2

CLOSED

SOURCE 1

OPENED

USAGE

POINT

SOURCE 2

OPENED

SOURCE 1

CLOSED

USAGE

POINT

SOURCE 2

CLOSED

SOURCE 1

CLOSED

USAGE

POINT

B’

40°÷50°

0 %

SOURCE 2

CLOSED

SOURCE 1

OPENED

USAGE

POINT

SOURCE 2

OPENED

SOURCE 1

CLOSED

USAGE

POINT

SOURCE 2

CLOSED

SOURCE 1

CLOSED

USAGE

POINT

B’’

30°÷60°

0 %

75°÷90°

100 %

SOURCE 2

CLOSED

SOURCE 1

OPENED

USAGE

POINT

SOURCE 2

OPENED

SOURCE 1

CLOSED

USAGE

POINT

SOURCE 2

CLOSED

SOURCE 1

CLOSED

USAGE

POINT

STEM POSITION

Source 1 opened

Source 2 opened

OFF / closed

Stem angle

0°

15°

75°

40°

50° 55°

45°

90°

100

B’

Overpressure

protection system

R274Y045, R274Y145, R274Y023, R274Y024, R274Y025 (1”)

STEM POSITION

Source 1 opened

Source 2 opened

OFF / closed

Stem angle

0°

15°

75°

30°

60°

55°

45°

90°

100

B’’

Overpressure

protection system

R274Y033, R274Y133 (1/2”)

R274-R274N-0576 Datasheet(PDF) 4 Page - GIACOMINI WATER E-MOTION

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