Armstrong 4302 Series Manual - Página 7

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Typical Specifications

Series 4302 Split Coupled

Vertical In-Line Pump

Supply and install as shown on the plans and specifications,

Armstrong Series 4302 dualARM split coupled Vertical In-Line

centrifugal pumping unit. The cast casing with equal size suction

and discharge flanges, having separate tapped flush line and

pressure gauge connections, shall incorporate two radially split,

single stage centrifugal pumps. Each pump shall have a cast bronze

dynamically balanced impeller, stainless steel shaft, lower seal flush

throttle bushing, outside balanced mechanical seal with stainless

steel parts, Viton secondary seal, carbon vs silicone carbide faces

and stainless steel gland plate and hardware. Each pump shall be

fitted with a factory furnished flush line to the mechanical seal. The

flush line is to be fitted with a manual air vent.

Each driving motor shall be an industry standard vertical solid

shaft, squirrel cage induction type, built to nema standards(motor

efficiency levels may be specified). The motor shall have

enclosure and be suitable for a

Volt power supply and shall be connected to the pump by means

of a rigid split type spacer coupling that permits removal of the

mechanical seal without disturbing the pump or motor connections.

The inlet and outlet ports on the casing shall be at least one size

larger than the single pump size, so that both units may operate

in parallel with no loss of single pump efficiency. Each port shall

be fitted with an isolation valve that allows the units to operate in

parallel or standby. It may also be used to isolate one pumping unit

for servicing or removal, while the other pump remains operating.

Flush line option:

Supply in the flush line to the mechanical seal a 50 micron cartridge

type filter (if the differential pressure exceeds 30 psig [2 bars], a

Cyclone separator may be specified) and a sight flow indicator. The

mechanical contractor shall change the filter cartridge after the

system has been flushed and on a regular basis thereafter, until the

building is turned over to the owner.

Hz,

Phase,

Series 4382 Close Coupled

Vertical In-Line Pump

Supply and install as shown on the plans and specifications,

Armstrong Series 4382 dualARM close coupled type Vertical In

-Line centrifugal pumping unit. The cast casing with equal size

suction and discharge flanges, having separate tapped flush line

and pressure gauge connections, shall incorporate two radially

split, single stage centrifugal pumps. Each pump shall have a

cast bronze dynamically balanced impeller, bronze shaft sleeve

and inside type single spring mechanical seal with carbon* vs

silicone carbide faces. Each pump shall be complete with a factory

furnished flush and vent line.

Each driving motor shall be an industry standard vertical solid

shaft, squirrel cage induction type, built to nema standards(motor

efficiency levels may be specified). The motor shall have

enclosure and be suitable for a

Volt power supply. The inlet and outlet ports on

the casing shall be at least one size larger than the single pump

size, so that both units may operate in parallel with no loss of

single pump efficiency. Each port shall be fitted with an isolation

valve that allows the units to operate in parallel or standby. It may

also be used to isolate one pumping unit for servicing or removal,

while the other pump remains operating.

* For liquids above 200°f / 93°c use: antimony loaded carbon

For Glycols greater than 30% by wt use: silicon carbide

Hz,

Phase,