6.1.35
bar g
13.8
13.8
13.8
13.8
13.8
13.8
13.8
13.8
13.8
13.8
13.8
12.4
12.4
12.4
12.4
12.4
12.4
12.4
12.4
12.4
11.0
11.0
11.0
11.0
11.0
11.0
11.0
11.0
11.0
9.7
9.7
9.7
9.7
9.7
9.7
9.7
9.7
8.3
8.3
psi g
200
200
200
200
200
200
200
200
200
200
200
180
180
180
180
180
180
180
180
180
160
160
160
160
160
160
160
160
160
140
140
140
140
140
140
140
140
120
120
bar g
10.3
9.7
8.3
6.9
5.5
4.1
3.4
2.8
2.1
1.4
1.0
8.3
6.9
5.5
4.1
3.4
2.8
2.1
1.4
1.0
8.3
6.9
5.5
4.1
3.4
2.8
2.1
1.4
1.0
6.9
5.5
4.1
3.4
2.8
2.1
1.4
1.0
5.5
4.1
psi g
kg/h
150
10055
140
10441
120
11305
100
12323
80
13573
60
15182
50
16200
40
17450
30
19059
20
21327
15
22936
120
10773
100
11827
80
13114
60
14773
50
15823
40
17109
30
18773
20
21109
15
22768
120
10241
100
11327
80
12650
60
14359
50
15445
40
16768
30
18482
20
20891
15
22600
100
10641
80
11918
60
13568
50
14614
40
15891
30
17541
20
19868
15
21518
80
11186
60
12777
lb/h
22120
22970
24870
27110
29860
33400
35640
38390
41930
46920
50460
23700
26020
28850
32500
34810
37640
41300
46440
50090
22530
24920
27830
31590
33980
36890
40660
45960
49720
23410
26220
29850
32150
34960
38590
43710
47340
24610
28110
bar g
8.3
8.3
8.3
8.3
8.3
6.9
6.9
6.9
6.9
6.9
6.9
5.5
5.5
5.5
5.5
5.5
5.5
4.8
4.8
4.8
4.8
4.8
4.8
4.1
4.1
4.1
4.1
4.1
3.4
3.4
3.4
3.4
2.8
2.8
2.8
2.8
2.1
2.1
psi g
120
120
120
120
120
100
100
100
100
100
100
80
80
80
80
80
80
70
70
70
70
70
70
60
60
60
60
60
50
50
50
50
40
40
40
40
30
30
bar g
3.4
2.8
2.1
1.4
1.0
4.1
3.4
2.8
2.1
1.4
1.0
4.1
3.4
2.8
2.1
1.4
1.0
3.4
2.8
2.1
1.7
1.4
1.0
2.8
2.1
1.7
1.4
1.0
2.1
1.7
1.4
1.0
2.1
1.7
1.4
1.0
1.4
1.0
psi g
kg/h
50
13782
40
15014
30
16605
20
18845
15
20432
60
11241
50
12318
40
13641
30
15341
20
17741
15
19445
60
9705
50
10855
40
12264
30
14077
20
16641
15
18455
50
9932
40
11286
30
13036
25
14145
20
15505
15
17255
40
10427
30
12200
25
13323
20
14695
15
16468
30
11505
25
12714
20
14050
15
15527
30
8855
25
10105
20
11636
15
13609
20
9291
15
11659
lb/h
30320
33030
36530
41460
44950
24730
27100
30010
33750
39030
42780
21350
23880
26980
30970
36610
40600
21850
24830
28680
31120
34110
37960
22940
26840
29310
32330
36230
25310
27970
30910
34160
19480
22230
25600
29940
20440
25650
Condensate pumps
Mechanical pumps and pumps traps
To size the PTF4 in a closed system:
Please note that the vent assist valve that is noted in the formula below can be identified by item 23 on page 1.
Establish the available motive pressure.
Establish the static backpressure on the pump-trap combination.
Place the established pressures into the formula below:
• Pump motive pressure – Minimum valve assist valve delta P > Backpressure
• Capacity charts to be read as normal, i.e. at pump motive and backpressure.
• If, Pump motive pressure – Minimum valve assist valve delta P < Backpressure, then isolate or remove the valve assist valve and multiply
the capacity by 0.77 to find the reduced capacity without the valve assist valve.
Sizing example: 1
A closed system has the following conditions:
Motive steam available = 10.3 bar g (150 psi g). Static backpressure = 3.1 bar g (45 psi g).
Open system
PTF4 capacity charts show capacity at 10.3 bar g (150 psi g) motive with 3.1 bar g (45 psi g) backpressure.
Closed system
The vent assist valve on the PTF4 requires at least 5.2 bar g (75 psi g) differential pressure to operate in a closed system.
To size the PTF4 pump:
Pump motive pressure – Minimum valve assist valve delta P > Backpressure
10.3 bar g (150 psi g) – 5.2 bar g (75 psi g) > 3.1 bar g (45 psi g)
As the motive pressure is 10.3 bar g (150 psi g) and the valve assist valve requires a minimum 8.3 bar g (120 psi g) to operate:
5.2 + 3.1 = 8.3 bar g (75 + 45 = 120 psi g), this combination is sized correctly.
Motive pressure
Backpressure
Condensate capacity
Motive pressure
Backpressure
Condensate capacity
TI-P135-13 ST Issue 2
PTF4 Pivotrol
®
Pump (patented) Dual Mechanism - Pressure Powered Pump
Page 6 of 8
Assumes a Fill Head - 1.42m (36"), Fill Height - 2.86m (70")
