Condensate pumps

Electric pumps

6.2.3

TI-P089-07

ST Issue 5

Series III

Condensate Recovery Unit

Optional

high level

alarm

Water

level

gauge

(optional)

Vent connection

Inlet connection

With galvanised receiver

Single or duplex pumps

Overflow pipework should

include a loopseal/inverted

syphon close to the vessel.

Overflow connection

With copper receiver

Single or duplex pumps

Description

The Spirax Sarco condensate recovery units are designed to handle

hot condensate, which is commonly returned for use as boiler

feedwater. They can handle quantities up to 34 000 kg/h at 98°C

with pump delivery heads up to 30 - 35 metres. A unit comprises

three main parts - receiver, pump/pumps and control gear.

Standards

This product fully complies with the requirements of the

European Machinery Directive 98/37/EC, European Low Voltage

Directive 72 / 73 / EEC and European Electromagnetic

Compatibility Devices Directive 89 / 336 / EEC. This product is not a

pressurised vessel and therefore does not need to comply with the

European Pressure Directive 97/23/EC.

Certification

The product is available with material certi

fication to EN 10204 2.1

and EN 10204 2.2. Note: All certification / inspection requirements

must be stated at the time of order placement.

Receiver

Mild steel receivers are hot dip galvanized after manufacture and

mounted in a galvanised steel frame with plated fastenings. Copper

receivers are mounted in lined cradles. Both types are fitted with an

inspection cover and adequately sized vent, overflow, drain and

two inlet connections screwed BSPT. They are pressure tested

to 2.1 bar.

Water level gauges complete with brass shut-off and drain cocks

can be provided as an extra.

Pumps

Pumps are constructed of cast iron fitted with Crane mechanical

seals and gunmetal impellers specially developed for operation

under conditions of extremely low NPSH to handle boiling condensate

with the minimum of flooded suction. They are close-coupled

to TEFC motors having class F insulation (class B temperature

rise) motor enclosure rating IP55 minimum and running at 2 850 rpm

(50 Hz) or 3 400 (60 Hz).

Control gear

Pump discharge

Isolating valves

Receivers are fitted with a magnetic switch float level control. The

single unit uses this to operate a single pump designed to discharge

at the rate of 1.5 times the maximum condensate rate shown on the

pump sizing chart.

The cascade unit uses two pumps, each rated at 1.1 times the

maximum rate shown on the sizing chart.

The control panel incorporates a selector switch which allows the duty

pump to take precedence in handling the load. If it is unable to cope

with any peak load then the cascade method of control brings in the

stand-by pump. This arrangement effectively provides automatic

changeover in the event of pump electrical or mechanical failure.

Electrical equipment is suitable for 415 volt 3 phase 50 Hz or 60 Hz

4 wire supply (380 volt to special order). Control equipment is

installed in a separate IP65 rated metal enclosure. Interconnecting

wiring is not included.

Connection for BMS interface are provided to monitor pump run or

tripped condition.

Fitting

Single or duplicate motorpumps are mounted under the receiver

and have individual suction pipework, incorporating an isolating

valve and resilient coupling. Pump deliveries are fitted with non-

return valves screwed BSPT. With duplicate pumps, both discharges

are on the same side of the unit.

Note: It is recommended that a lockshield valve should be fitted in

the delivery pipework so that, in the event of the system head being

substantially less than the unit head, the valve may be adjusted

to increase the system head, thus reducing possible cavitation

and noise.

Local regulations may restrict the use of this product to below the conditions quoted.

In the interests of development and improvement of the product, we reserve the right to change the specification.

© Copyright 2003