
Littleton, CO USA Phone 303-794-2611 www.norgren.com
FIT-3-17
Function Fittings and Flow Controls
Dimensions in Inches (mm)
* C measured in dm
3
/(s.bar) ** Cv measured in US gal/min.
* Available only with collet tube connection
Model A B C D E F G H
T55MO500 .43 (11) 1.08 (27.5) (M5) .20 (5) .16 (4) .42 (10.7) .12 (3) .47 (12)
T55A1800 .55 (14) 1.67 (42.5) (1/8) – .28 (7) .54 (13.7) .16 (4) .59 (15)
T55B1800 .55 (14) 1.67 (42.5) (1/8) – .28 (7) .54 (13.7) .16 (4) .59 (15)
T55C1800 .55 (14) 1.67 (42.5) (1/8) .28 (7) .28 (7) .54 (13.7) .16 (4) .59 (15)
T55A2800 .67 (17) 2.13 (54) (1/4) – .31 (8) .66 (16.7) .20 (5) .73 (18.5)
T55B2800 .67 (17) 2.13 (54) (1/4) – .31 (8) .66 (16.7) .20 (5) .73 (18.5)
T55C2800 .67 (17) 2.13 (54) (1/4) .41 (10.5) .31 (8) .66 (16.7) .20 (5) .73 (18.5)
T55A3800 .94 (24) 2.48 (63) (3/8) – .35 (9) .93 (23.7) .28 (7) 1.02 (26)
T55B3800 .94 (24) 2.48 (63) (3/8) – .35 (9) .93 (23.7) .28 (7) 1.02 (26)
T55C3800 .94 (24) 2.48 (63) (3/8) .47 (12) .35 (9) .93 (23.7) .28 (7) 1.02 (26)
T55A4800 1.06 (27) 3.03 (77) (1/2) – .47 (12) 1.05 (26.7) .39 (10) 1.18 (30)
T55B4800 1.06 (27) 3.03 (77) (1/2) – .47 (12) 1.05 (26.7) .39 (10) 1.18 (30)
T55C4800 1.06 (27) 3.03 (77) (1/2) .59 (15) .47 (12) 1.05 (26.7) .39 (10) 1.18 (30)
T55 Series
Port Flow Factor Flow Factor Cracking Model
Size Cv** C* pressure (bar) oz (kg) Metric BSPP BSPT NPT
M5 0.19 0.8 0.73 (0.05) 0.35 (0.010) T55MO500
1⁄8 0.59 2.4 0.73 (0.05) 0.53 (0.015) T55C1800 T55B1800 T55A1800
1⁄4 1.35 5.5 0.73 (0.05) 0.88 (0.025) T55C2800 T55B2800 T55A2800
3⁄8 2.20 9.0 0.73 (0.05) 2.12 (0.060) T55C3800 T55B3800 T55A3800
1⁄2 3.70 15.0 0.73 (0.05) 2.82 (0.080) T55C4800 T55B4800 T55A4800
* C measured in dm
3
/(s.bar) ** Cv measured in US gal/min.
E
B
G
C
D
A
A/F
ØH
ØF
I
C
Model A B C D F G H I
T56MO500 .43 (11) 1.25 (31.8) (M5) .20 (5) .42(10.7) .12 (3) .47 (12) .17 (4.3)
T56A1800 .55 (14) 1.93 (49) (1/8) (–) .54 (13.7) .16 (4) .59 (15) .37 (9.5)
T56B1800 .55 (14) 1.93 (49) (1/8) (–) .54 (13.7) .16 (4) .59 (15) .37 (9.5)
T56C1800 .55 (14) 1.77 (45) (1/8) .28 (7) .54 (13.7) .16 (4) .59 (15) .22 (5.5)
T56A2800 .67 (17) 2.46 (62.5) (1/4) (–) .66 (16.7) .20 (5) .73 (18.5) .56 (14.3)
T56B2800 .67 (17) 2.32(59) (1/4) (–) .66 (16.7) .20 (5) .73 (18.5) .43 (11)
T56C2800 .67 (17) 2.21 (56.2) (1/4) .41 (10.5) .66 (16.7) .20 (5) .73 (18.5) .31 (8)
Model A B C D E
C/523 1.42 (36) 3.6 (92) 3⁄4 .71 (18) .71 (18)
S/523 1.42 (36) 3.6 (92) 3⁄4 .71 (18) .71 (18)
C/524 1.93(49) 4.88 (124) (1) .98 (25) .98 (25)
S/524 1.93(49) 4.88 (124) (1) .98 (25) .98 (25)
T56 Series
Port Flow Factor Flow Factor Cracking Model
Size Cv** C* pressure (bar) oz (kg) Metric BSPP BSPT NPT
M5 0.19 0.55 0.73 (0.05) 0.64 (0.018) T56MO500
1⁄8 0.59 2.4 0.73 (0.05) 1.59 (0.045) T56C1800 T56B1800 T56A1800
1⁄4 1.23 5.0 0.73 (0.05) 2.82 (0.080) T56C2800 T56B2800 T56A2800
Model Port Flow factor Cracking Weight Spares Kit
NPT ISO G Size Cv Pressure psi (bar) lbs. (kg) NPT ISO G
C/523 S/523 3⁄4 6.5 0.9 (0.06) 1.21 (.55) QC/523/00 QS/523/00
C/524 S/524 1 8.9 0.9 (0.06) 2.43 (1.10) QC/524/00 QS/524/00
Note : For high temperature applications a T should be added on spares kit part number (i.e. TQS/520/00)
Initial cracking pressure may be higher if valve has been stored for a long period.
C/523 – C/524 Series
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