|
Tech Bulletin: Nominal K-Factors
The accuracy of SeaMetrics flow meters depends on the accuracy of the K-factor for each meter fitting or spool piece. All SeaMetrics S-Series, and WT Series flow meters are custom calibrated on water to produce a single K-factor which will produce the stated flow meter accuracy and linearity over the entire flow meter range. All Tee-type Meter Fittings for IP80 and TX80 Series Insertion Flow Meters are also wet-calibrated to derive an individual K-factor for each device.
The K-factor is written on the Serial Number label, and also is written on the meter or tee fitting itself, below the label, in indelible ink. However, it is sometimes useful to know what the nominal K-factor is for control planning purposes, or in case the K-factor is no longer readable. We have provided this chart of nominal K-factors for the convenience of our customers.
Please note: The calibrated K-factor on any given SeaMetrics meter will, and should, be somewhat different than these tables.
|
Pipe Size
|
IP80
|
TX80
|
WT Series
|
S-Series
|
3/8"
1/2"
Brass
PVC
Stainless Steel |
•
•
650
660
460
|
•
•
•
•
•
|
•
•
•
•
•
|
1275
625
•
•
•
|
3/4"
Brass
PVC
Stainless Steel |
•
315
360
295
|
•
•
•
•
|
•
•
•
•
|
445
•
•
•
|
1"
Brass
PVC
Carbon Steel
Stainless Steel |
•
225
210
220
210
|
•
160
148
60
55
|
•
•
•
•
•
|
243
•
•
•
•
|
1-1/2"
Brass
PVC
Carbon Steel
Stainless Steel |
•
70
100
65
65
|
•
68
140
70
70
|
•
•
140
70
70
|
•
•
•
•
•
|
2"
Brass
PVC
Carbon Steel
Stainless Steel |
•
45
60
65
60
|
•
35
60
65
60
|
•
•
60
65
60
|
•
•
•
•
•
|
3"
Brass
Thread Tee
Sweat Tee
Brass Saddle
PVC Saddle
Cast Saddle
All Weldolets
Carbon Steel
Stainless Steel
PVC Spool |
•
•
•
35
35
20
30
32
29
•
•
•
|
•
•
•
26
26
10
22
23
27
•
•
•
|
•
•
•
•
•
•
•
•
•
10.0
7.5
10.0
|
•
•
•
•
•
•
•
•
•
•
•
•
|
4"
Brass
Thread Tee
Sweat Tee
Brass Saddle
PVC Saddle
Cast Saddle
All Weldolets
Carbon Steel
Stainless Steel
PVC Spool |
•
•
25
22
30
19
19
29
•
•
•
|
•
•
15
16
20
12
13
27
•
•
•
|
•
•
•
•
•
•
•
•
•
4.9
4.9
5.8
|
•
•
•
•
•
•
•
•
•
•
•
•
|
6"
PVC Saddle
Cast Saddle
All Weldolets
Carbon Steel
Stainless Steel
PVC Spool |
•
8.4
8.0
7.4
•
•
•
|
•
4.4
4.0
4.5
•
•
•
|
•
•
•
•
1.6
1.6
2.0
|
•
•
•
•
•
•
•
|
8"
PVC Saddle
Cast Saddle
All Weldolets
Carbon Steel
Stainless Steel |
•
4.1
5.4
4.3
•
•
|
•
2.3
2.2
2.1
•
•
|
•
•
•
•
1.0
1.0
|
•
•
•
•
•
•
|
|
