Armstrong Vertical In-Line (VIL) pumps serve a wide variety of applications including HVAC systems, automotive,
transportation, municipal, glass and plastic, as well as general industrial and power plants. In addition to reduced
maintenance and servicing costs, the VIL design generates considerable savings in floor space and installation costs.
Vertical In-Line Pumps
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Vertical In-Line Series 4360
Armstrong’s Series 4360 is an economical, lower-range VIL pump for HVAC, domestic water systems
and industrial applications requiring a compact pump. Positive sealing is assured by proven inside-type
mechanical seal. The radially split volute permits removal of the motor and pump rotating assembly
without removing the pump volute from the line. Units are available in bronze-fitted, all bronze or all
iron construction, in a range of sizes.
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Vertical In-Line Series 4300
Armstrong Series 4300 VIL pumps realize 60% savings in space compared to base-mounted pumps.
The split-coupled design allows mechanical seal replacement without costly removal of the motor or
pump from the piping. The high-performance outside-type mechanical seal combines the advantages of
a multiple-spring balanced seal with premium quality materials, while the inside-type mechanical seal
provides an economical alternative. The double suction design is available in sizes 12 inches and larger.
Series 4300 VIL pumps are available in bronze-fitted, all iron and ductile iron construction.
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Vertical In-Line Series 4380
Armstrong’s close-coupled VIL pump features an economical inside-type, single-spring
mechanical seal. The unit is serviced by removing the rotating assembly while the pump casing
remains in the line. The dynamically balanced impeller assures smooth, vibration-free operation
and the radially split volute features equal suction and discharge flange sizes. This design also
provides separate tapped openings for gauge, flush and drain connections. Units are available
in bronze-fitted, all iron and ductile iron construction.
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Design Envelope HVAC Pumps
The Armstrong Design Envelope is a pre-set range of the most efficient pump selections for a
given capacity range. The Design Envelope approach to system selection allows you to reduce
design risk and avoid costs resulting from equipment change orders. Calculating your preliminary
design requirements, and then selecting a Design Envelope that provides a sufficient comfort
zone around the preliminary design point ensures that your pump selection will be future-proofed
against system changes during construction and over the life of the building.
There is no longer a need to oversize your initial design point. The Design Envelope functions as
a safety net for any anticipated system changes due to as-built design, building envelope adjust-
ments, tenant demographic changes, or changes in building usage. Specifying an oversized
pumping unit typically results in lower efficiency under actual operating conditions. Using the
Design Envelope approach, you can select and specify a unit that suits your current and antici-
pated needs. Armstrong variable speed pumping units will deliver excellent efficiency throughout
the entire Design Envelope and the operating range of the unit.
400
8
80
7 8
100
Capacity -m
3
/h
10
20
30 40
60
200 300
2
3
4
6
8
Head -meters
10
20
30
40
60
100
200
Capacity - L/s
Capacity - USgpm
60
40
20
10
2
3 4
100
8
5 6
30
Head - feet
6
10
20
30
40
60
100
200
300
400
700
1000
200
40
60
100
400
600
80
2000
30
80
50
300
80
500
80
06AB4
63.2%
06BC4
76.8%
06CD4
82.8%
08AD4
64.2%
08BF4
80.0%
10AF4
58.6%
06AG2
63.5%
10BH4
08CH4
77.5%
08DI4
83.7%
08AJ2
64.8%
10DJ4
83.4%
08BL2
80.2%
11AM4
80.6%
10AM2
57.7%
10BP2
67.6%
06BH2
74.8%
71.3%
10CP2
71.0%
10DP2
79.1%
