Flowserve Mark 3 Sealed Metallic Durco User Manual
Page 18
MARK 3 USER INSTRUCTIONS ENGLISH 71569102 01-13
Page 18 of 72
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Figure 3-7: Suction pressure reference numbers
Pump Size
1750
3500
1K 1.5x1-6
7
10
1K 3x1.5-6
10
15
1K 3x2-6 and US-6
10
12
1K 2 x1.5V-6
PT
18
1K 1.5x1-8
1K 1.5x1.5US-8
7
6
1K 2x1.5V-8
PT
16
1K 3x1.5-8
4
4
1K 3x2V-7
PT
11
2K 3x2-8 and US-8
10
7
2K 4x3-8 and US-8
10
13
2K 2x1-10A
8
3
2K 2x1.5V-10A
2K 2x1.5US-10A
8
3
2K 3x1.5-10A
10
17
2K 3x2-10A
10
14
2K 3x2V-10
In-Line
11
9
2K 4x3-10
6
2
2K 4x3-10H
3
na
2K 6x4-10
5
8
2K 6x4-10H
10
na
2K 3x1.5-13
9
5
2K 3x2-13
5
1
2K 4x3-13/13
1
na
2K 4x3-13/12
1
na
2K 4x3-13/11 max
1
2
2K 4x3-13HH
10
na
2K 6x4-13A
1
na
2K 6x4-13A/10.25
1
?
3K 8x6-14A
2
na
3K 10x8-14
PT
na
3K 6x4-16
PT
na
3K 8x6-16A
PT
na
3K 10x8-16 & 16H
PT
na
3K 10x8-17
3
na
12X10-18HD
PT
na
Recessed Impellers
PT
PT
Lo-Flo Pumps
PT
PT
Open Impellers
PT
PT
Notes:
1.
Self-Primer and In-Line pumps not specifically listed above
are to use the standard pump ratings given.
For example: 2K 3x2V-13 and 2K 3x2US-13 pumps utilize the
standard 2K 3x2-13 ratings.
2.
P-T: Only limited by Pressure-Temperature ratings.
3.
Open impeller pumps including the Lo-Flo and Recessed
Impeller products are limited in suction pressure only by the
Pressure-Temperature Ratings.
4.
Sealmatic Pump suction pressure is limited by the repeller
3.4.4
Minimum continuous flow
The minimum continuous flow (MCF) is based on a
percentage of the best efficiency point (BEP). Figure
3-8 identifies the MCF for all Mark 3 pump models
with the exception of the Lo-Flo pump line; there is no
MCF associated with this product line.
Figure 3-8: Minimum continuous flow
Pump size
MCF % of BEP
3500/2900
r/min
1750/1450
r/min
1180/960
r/min
1K3x2-6
20%
10%
10%
1K3x2-7
25%
10%
10%
2K3x2-8
20%
10%
10%
2K4x3-8
20%
10%
10%
2K3x2-10
30%
10%
10%
2K4x3-10
30%
10%
10%
2K6x4-10
40%
10%
10%
2K6x4-10H
n.a.
20%
10%
2K3x1.5-13
30%
10%
10%
2K3x2-13
40%
10%
10%
2K4x3-13
40%
20%
10%
2K4x3-13HH
n.a.
50%
30%
2K6x4-13
60%
40%
10%
3K8x6-14
n.a.
40%
15%
3K10x8-14
n.a.
40%
10%
3K6x4-16
n.a.
50%
10%
3K8x6-16
n.a.
50%
10%
3K10x8-16
n.a.
50%
10%
3K10x8-17
n.a.
50%
10%
3K12x10-18HD
n.a.
60%
10%
All other sizes
10%
10%
10%
3.4.5
Minimum suction pipe submergence
To avoid priming problems, consideration should be
given to minimum suction pipe submergence when
installing Unitized self-priming pumps.