FITTINGS
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5
FIT-55
T55/T56 Series
Non-return valves In-line
M5, 1/8", 1/4", 3/8", 1/2"
E
B
G
C
D
D
C
A A/F
ØH
ØF
E
B
G
C
D
A
A/F
ØH
ØF
I
C
Section 00 Symbols
Symbol 108
2 1
T55
T55 Series
Port Flow Factor Cracking Weight Model
Size Cv** pressure oz NPT BSPP
1⁄8 0.59 0.73 0.53 T55A1800 T55C1800
1⁄4 1.35 0.73 0.88 T55A2800 T55C2800
3⁄8 2.20 0.73 2.12 T55A3800 T55C3800
1⁄2 3.70 0.73 2.82 T55A4800 T55C4800
** Cv measured in US gal/min.
Permit free flow of air in one direction only
Simple, reliable design
Silicone free
Low cracking pressure
T56 male connections have an O-ring in parallel
threads
Model A B C D E F G H
T55A1800 0.55 1.67 1/8 – 0.28 0.54 0.16 0.59
T55C1800 0.55 1.67 1/8 0.28 0.28 0.54 0.16 0.59
T55A2800 0.67 2.13 1/4 – 0.31 0.66 0.20 0.73
T55C2800 0.67 2.13 1/4 0.41 0.31 0.66 0.20 0.73
T55A3800 0.94 2.48 3/8 – 0.35 0.93 0.28 1.02
T55C3800 0.94 2.48 3/8 0.47 0.35 0.93 0.28 1.02
T55A4800 1.06 3.03 1/2 – 0.47 1.05 0.39 1.18
T55C4800 1.06 3.03 1/2 0.59 0.47 1.05 0.39 1.18
T56 Series
Port Flow Factor Cracking Weight
Size Cv** pressure oz NPT BSPP
1⁄8 0.59 0.73 1.59 T56A1800 T56C1800
1⁄4 1.23 0.73 2.82 T56A2800 T56C2800
** Cv measured in US gal/min.
Model A B C D F G H I
T56A1800 0.55 1.93 1/8 – 0.54 0.16 0.59 0.37
T56C1800 0.55 1.77 1/8 0.28 0.54 0.16 0.59 0.22
T56A2800 0.67 2.46 1/4 – 0.66 0.20 0.73 0.56
T56C2800 0.67 2.21 1/4 0.41 0.66 0.20 0.73 0.31
Medium:
Compressed air, filtered,
lubricated and non-lubricated
Operating pressure:
1.5 to 145 psig (0.1 to 10 bar)
Operating temperature:
0°F to 175°F* (-20°C to +80°C)
*Consult our Technical Service for use
below 35°F (+2°C)
Materials
Body: aluminum (T55),
brass (T56)
O-ring: nitrile rubber
Valve: POM
Spring: stainless steel
Note: FPM seals for high
temperature version
Technical data
