- 9 -
K) Operating Limits
The viscosity of the product to be metered will have a direct impact on the flow rate at which
the metering system can effectively operate. The following chart is a flow meter selection
guide indicating the relationship between viscosity and flow rate. If the desired system flow
rate and fluid viscosity fall outside the recommended operating limits, the flow rate must be
reduced.
VISCOSITY CONVERSION
(Specific Gravity = 1)
SSU
SSU
SSU
SSU
CPS
Saybolt
CPS
Saybolt
CPS
Saybolt
CPS
Saybolt
Centipoise
Universal
Centipoise
Universal
Centipoise
Universal
Centipoise
Universal
1
31
200
1,000
900
4,300
7,000
32,500
2
34
220
1,100
1,000
4,600
8,000
37,000
4
38
240
1,200
1,200
5,620
8,500
39,500
7
47
260
1,280
1,300
6,100
9,000
41,080
10
60
280
1,380
1,400
6,480
9,500
43,000
15
80
300
1,475
1,500
7,000
10,000
46,500
20
100
320
1,530
1,700
8,000
15,000
69,400
25
130
340
1,630
1,800
8,500
20,000
92,500
30
160
360
1,730
1,900
9,000
30,000
138,500
40
210
380
1,850
2,000
9,400
40,000
185,000
50
260
400
1,950
2,200
10,300
50,000
231,000
60
320
420
2,050
2,400
11,200
60,000
277,500
70
370
440
2,160
2,500
11,600
70,000
323,500
80
430
460
2,270
3,000
14,500
80,000
370,000
90
480
480
2,380
3,500
16,500
90,000
415,500
100
530
500
2,480
4,000
18,500
100,000
462,000
120
580
550
2,660
5,000
23,500
125,000
578,000
140
690
600
2,900
5,500
26,000
150,000
694,000
160
790
700
3,380
6,000
28,000
175,000
810,000
180
900
800
3,880
6,500
30,000
200,000
925,000
Centistokes
=
Centipoise
Centipoise = Centistokes x Specific Gravity
Specific Gravity