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Bulletin 71.4:SR8
15
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.
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