Estimated Pressure Drop for Thermoplastic Lined Fittings and Valves

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The following table chart defines the Estimated Pressure Drop for Thermoplastic Lined Fittings and Valves.

All values are in psi

Estimated Pressure Drop for Thermoplastic Lined Fittings and Valves
Size
mm (in)

Standard
90 deg. elbow

Standard Tee
Plug Valve
Diaphram Valve
Vertical Check Valve
Horizontal Check Valve
Through run
Through run branch
25 (1)
0.55 (1.8)
0.37 (1.2)
1.4 (4.5)
0.61 (2.0)
2.1 (7)
1.8 (6.0)
4.9 (16)
40 (1½)
1.1 (3.5)
0.70 (2.3)
2.3 (7.5)
1.3 (4.2)
3.0 (10)
1.8 (6.0)
7.0 (23)
50 (2)
1.4 (4.5)
0.91(3.0)
3.0 (10)
1.7 (5.5)
4.9 (16)
3.0 (10)
14 (45)
65 (2½)
1.7 (5.5)
1.2 (4.0)
3.7 (12)
N.A.
6.7 (22)
3.4 (11)
15 (50)
80 (3)
2.1 (7.0)
1.2 (4.1)
4.6 (15)
N.A.
10 (33)
3.7 (12)
18 (58)
100 (4)
3.0 (10)
1.8 (6.0)
6.1 (20)
N.A.
21 (68)
6.1 (20)
20 (65)
150 (6)
4.6 (15)
3.0 (10)
9.8 (32)
N.A.
26 (85)
9.4 (31)
46 (150)
200 (8)
5.8 (19)
4.3 (14)
13 (42)
N.A.
46 (150)
23 (77)
61 (200)
250 (10)
7.6 (25)
5.8 (19)
16 (53)
N.A.
N.A.
N.A.
N.A.
300 (12)
9.1 (30)
7.0 (23)
20 (64)
N.A.
N.A.
N.A.
N.A.

Notes:
Data is for water expressed as equal length of straight pipe in m (ft)
N.A. = Part is not available from source.
Source:
“Plastic Lined Piping Products Engineering Manual”

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