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Bulletin 71.4:SR8

Table 8. Liquid Capacities (continued)

SPRING

RANGE,

PSIG (bar)

SET

PRESSURE,

PSIG (bar)

CAPACITIES IN GPM (l/min) WATER AT % BUILD-UP

Elastomer Diaphragm Metal Diaphragm

NPS 3/4 (DN 20) NPS 3/4 (DN 20)

10% 20% 30% 40% 10% 20% 30% 40%

2 to 8

(0,14 to 0,55)

2 (0,14) 0.9 (3,4) 1.0 (3,8) 1.4 (5,3) 1.8 (6,8)

Not Available5 (0,34) 1.9 (7,2) 3.4 (13) 5.3 (20) 6.0 (23)

8 (0,55) 3.1 (12) 6.0 (23) 9.5 (36) 10 (38)

5 to 25

(0,34 to 1,7)

5 (0,34) 1.4 (5,3) 2.1 (7,9) 3.0 (11) 3.8 (14) 1.2 (4,5) 1.4 (5,3) 1.6 (6,1) 2.0 (7,6)

15 (1,0) 4.2 (16) 8.9 (34) 12 (45) 13 (49) 2.3 (8,7) 3.0 (11) 3.8 (14) 4.7 (18)

25 (1,7) 6.3 (24) 14 (53) 16 (61) 17 (64) 2.9 (11) 3.9 (15) 5.1 (19) 6.3 (24)

10 to 50

(0,69 to 3,4)

10 (0,69) 2.1 (7,9) 3.2 (12) 4.6 (17) 6.4 (24) 1.5 (5,7) 1.9 (7,2) 2.2 (8,3) 2.7 (10)

15 (1,0) 3.3 (12) 5.7 (22) 7.5 (28) 9.7 (37) 2.1 (7,9) 2.7 (10) 3.4 (13) 4.3 (16)

30 (2,1) 5.8 (22) 11 (42) 13 (49) 16 (61) 3.1 (12) 4.4 (17) 5.8 (22) 7.2 (27)

45 (3,1) 7.7 (29) 15 (57) 18 (68) 21 (79) 3.9 (15) 5.6 (21) 7.5 (28) 9.4 (36)

50 (3,4) 8.2 (31) 16 (61) 19 (72) 22 (83) 4.1 (16) 5.9 (22) 8.0 (30) 10 (38)

35 to 100

(2,4 to 6,9)

35 (2,4) 5.2 (20) 11 (42) 16 (61) 19 (72) 3.2 (12) 4.3 (16) 5.4 (20) 6.6 (25)

50 (3,4) 8.7 (33) 16 (61) 21 (79) 22 (83) 4.0 (15) 5.6 (21) 7.6 (29) 9.6 (36)

75 (5,2) 13 (49) 23 (87) 26 (98) 26 (98) 5.2 (20) 7.4 (28) 10 (38) 14 (53)

100 (6,9) 17 (64) 28 (106) 29 (110) 30 (114) 6.1 (23) 8.8 (33) 13 (49) 17 (64)

75 to 125

(5,2 to 8,6)

75 (5,2) 13 (49) 22 (83) 25 (95) 26 (98) 7.8 (30) 13 (49) 16 (61) 18 (68)

100 (6,9) 17 (64) 28 (106) 29 (110) 30 (114) 8.7 (33) 12 (45) 17 (64) 21 (79)

125 (8,6) 21 (79) 31 (117) 32 (121) 9.7 (37) 15 (57) 20 (76)

Shaded areas indicate conditions where maximum differential pressure for the spring range is exceeded.

Table 8. Liquid Capacities

SPRING

RANGE,

PSIG (bar)

SET

PRESSURE,

PSIG (bar)

CAPACITIES IN GPM (l/min) WATER AT % BUILD-UP

Elastomer Diaphragm Metal Diaphragm

NPS 1/2 (DN 15) NPS 1/2 (DN 15)

10% 20% 30% 40% 10% 20% 30% 40%

2 to 8

(0,14 to 0,55)

2 (0,14) 0.7 (2,6) 0.9 (3,4) 1.1 (4,2) 1.2 (4,5)

Not Available

5 (0,34) 1.1 (4,2) 1.6 (6,1) 2.1 (7,9) 2.6 (9,8)

8 (0,55) 1.5 (5,7) 2.5 (9,5) 3.3 (12) 4.1 (16)

5 to 25

(0,34 to 1,7)

5 (0,34) 0.8 (3,0) 1.2 (4,5) 1.6 (6,1) 2.1 (7,9) 0.7 (2,6) 0.9 (3,4) 1.0 (3,8) 1.2 (4,5)

15 (1,0)

2.4 (9,1) 3.9 (15) 4.8 (18) 5.5 (21) 1.6 (6,1) 2.3 (8,7) 2.8 (11) 3.5 (13)

25 (1,7) 3.3 (12) 5.6 (21) 6.8 (26) 7.2 (27) 2.1 (7,9) 3.1 (12) 3.9 (15) 4.9 (19)

10 to 50

(0,69 to 3,4)

10 (0,69) 1.3 (4,9) 2.2 (8,3) 3.1 (12) 4.1 (16) 1.2 (4,5) 1.4 (5,3) 1.8 (6,8) 2.1 (7,9)

15 (1,0) 2.2 (8,3) 3.6 (14) 4.4 (17) 5.2 (20) 1.5 (5,7) 2.0 (7,6) 2.6 (9,8) 3.2 (12)

30 (2,1) 3.8 (14) 6.3 (24) 6.9 (26) 7.5 (28) 2.1 (7,9) 3.1 (12) 4.3 (16) 5.4 (20)

45 (3,1) 5.0 (19) 8.4 (32) 8.7 (33) 9.0 (34) 2.6 (10) 3.9 (15) 5.6 (21) 7.0 (26)

50 (3,4) 5.4 (20) 8.8 (33) 9.1 (34) 9.4 (36) 2.8 (11) 4.1 (16) 6.0 (23) 7.5 (28)

35 to 100

(2,4 to 6,9)

35 (2,4) 3.2 (12) 5.2 (20) 7.0 (26) 8.1 (31) 2.2 (8,3) 3.3 (12) 4.2 (16) 5.4 (20)

50 (3,4) 4.2 (16) 6.9 (26) 8.8 (33) 9.4 (36) 2.8 (11) 4.3 (16) 5.8 (22) 7.5 (28)

75 (5,2) 5.6 (21) 9.1 (34) 11 (42) 11 (42) 3.6 (14) 5.8 (22) 7.9 (30) 10 (38)

100 (6,9) 6.7 (25) 11 (42) 12 (45) 13 (49) 4.3 (16) 6.9 (26) 9.5 (36) 12 (45)

75 to 125

(5,2 to 8,6)

75 (5,2) 8.3 (31) 10 (38) 11 (42) 11 (42) 8.0 (30) 10 (38) 11 (42) 11 (42)

100 (6,9) 9.2 (35) 12 (45) 12 (45) 13 (49) 8.9 (34) 12 (45) 12 (45) 13 (49)

125 (8,6) 11 (42) 13 (49) 13 (49) 9.2 (35) 13 (49) 14 (53)

Shaded areas indicate conditions where maximum differential pressure for the spring range is exceeded.

1 2 ... 10 11 12 13 14 15 16 17 18 19 20

Bulletin 71.4:SR8 1

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