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Bulletin 71.4:SR8
9
Table 6. Air Capacities (continued)
SPRING
RANGE,
PSIG (bar)
SET
PRESSURE,
PSIG (bar)
CAPACITIES IN SCFH (Nm
3
/h) OF AIR 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) 180 (4,8) 220 (5,9) 300 (8,0) 370 (9,9)
Not Available5 (0,34) 370 (9,9) 640 (17) 990 (27) 1110 (30)
8 (0,55) 550 (15) 1060 (28) 1670 (45) 1840 (49)
5 to 25
(0,34 to 1,7)
5 (0,34) 270 (7,2) 400 (11) 550 (15) 700 (19) 230 (6,2) 260 (7,0) 310 (8,3) 370 (9,9)
15 (1,0) 740 (20) 1550 (42) 2080 (56) 2280 (61) 400 (11) 520 (14) 660 (18) 830 (22)
25 (1,7) 1200 (32) 2700 (72) 3600 (96) 3850 (103) 560 (15) 770 (21) 1020 (27) 1300 (35)
10 to 50
(0,69 to 3,4)
10 (0,69) 360 (9,6) 550 (15) 800 (21) 1100 (29) 270 (7,2) 330 (8,8) 390 (10) 480 (13)
15 (1,0) 570 (15) 990 (27) 1310 (35) 1700 (46) 360 (9,6) 480 (13) 600 (16) 750 (20)
30 (2,1) 1180 (32) 2330 (62) 2850 (76) 3500 (94) 640 (17) 920 (25) 1240 (33) 1590 (43)
45 (3,1) 1800 (48) 3660 (98) 4390 (118) 5300 (142) 910 (24) 1350 (36) 1890 (51) 2420 (65)
50 (3,4) 2000 (54) 4100 (110) 4900 (131) 5900 (158) 1000 (27) 1500 (40) 2100 (56) 2700 (72)
35 to 100
(2,4 to 6,9)
35 (2,4) 1100 (29) 2350 (63) 3700 (99) 4800 (129) 680 (18) 940 (25) 1220 (33) 1540 (41)
50 (3,4) 2120 (57) 4000 (107) 5430 (146) 6480 (174) 980 (26) 1420 (38) 1980 (53) 2590 (69)
75 (5,2) 3810 (102) 6750 (181) 8320 (223) 9290 (249) 1490 (40) 2210 (59) 3240 (87) 4350 (117)
100 (6,9) 5500 (147) 9500 (255) 11200 (300) 12100 (324) 2000 (54) 3000 (80) 4500 (121) 6100 (163)
75 to 125
(5,2 to 8,6)
75 (5,2) 3660 (98) 6670 (179) 7760 (208) 8680 (233) 2240 (60) 3760 (101) 4910 (132) 5710 (153)
100 (6,9) 5570 (149) 9520 (255) 10540 (282) 11300 (303) 2860 (77) 4080 (109) 6100 (163) 7800 (209)
125 (8,6) 7650 (205) 11690 (313) 12680 (340) 3510 (94) 5510 (148) 7940 (213)
Shaded areas indicate conditions where maximum differential pressure for the spring range is exceeded.
Table 6. Air Capacities
SPRING
RANGE,
PSIG (bar)
SET
PRESSURE,
PSIG (bar)
CAPACITIES IN SCFH (Nm
3
/h) OF AIR 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) 140 (3,8) 180 (4,8) 220 (5,9) 260 (7,0
Not Available5 (0,34) 210 (5,6) 320 (8,6) 410 (11) 500 (13)
8 (0,55) 270 (7,2) 450 (12) 600 (16) 730 (20)
5 to 25
(0,34 to 1,7)
5 (0,34) 160 (4,3) 230 (6,2) 300 (8,0) 400 (11) 120 (3,2) 140 (3,8) 160 (4,3) 190 (5,1)
15 (1,0) 430 (12) 720 (19) 900 (24) 1050 (28) 240 (6,4) 340 (9,1) 430 (12) 550 (15)
25 (1,7)
700 (19) 1200 (32) 1500 (40) 1700 (46) 350 (9,4) 540 (14) 700 (19) 900 (24)
10 to 50
(0,69 to 3,4)
10 (0,7) 240 (6,4) 400 (11) 560 (15) 730 (20) 170 (4,6) 210 (5,6) 260 (7,0) 310 (8,3)
15 (1,0) 390 (10) 660 (18) 830 (22) 1000 (27) 220 (5,9) 300 (8,0) 400 (11) 500 (13)
30 (2,1) 850 (23) 1450 (39) 1630 (44) 1820 (49) 390 (10) 570 (15) 830 (22) 1060 (28)
45 (3,1) 1300 (35) 2240 (60) 2430 (65) 2630 (70) 550 (15) 840 (23) 1260 (34) 1610 (43)
50 (3,4) 1450 (39) 2500 (67) 2700 (72) 2900 (78) 600 (16) 930 (25) 1400 (38) 1800 (48)
35 to 100
(2,4 to 6,9)
35 (2,4) 750 (20) 1260 (34) 1750 (47) 2150 (58) 420 (11) 640 (17) 860 (23) 1130 (30)
50 (3,4) 1130 (30) 1920 (51) 2520 (68) 2970 (80) 610 (16) 980 (26) 1350 (36) 1790 (48)
75 (5,2) 1770 (47) 3010 (81) 3810 (102) 4330 (116) 930 (25) 1540 (41) 2180 (58) 2900 (78)
100 (6,9) 2400 (64) 4100 (110) 5100 (137) 5700 (153) 1250 (34) 2100 (56) 3000 (80) 4000 (107)
75 to 125
(5,2 to 8,6)
75 (5,2) 2650 (71) 3590 (96) 3960 (106) 4100 (110) 2060 (55) 3160 (85) 3650 (98) 4100 (110)
100 (6,9) 3310 (89) 4550 (122) 4910 (132) 5580 (150) 2610 (70) 4190 (112) 4360 (117) 4950 (133)
125 (8,6) 4390 (118) 5250 (141) 5770 (155) 2970 (80) 4870 (131) 5310 (142)
Shaded areas indicate conditions where maximum differential pressure for the spring range is exceeded.
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