Boiler house
Feedtank ancillaries
ISO 9001
2.1.3
RFS1
RFS1
RFS1
RFS2
RFS2
TI-P401-08
AB Issue 3
Cert. No. LRQ 0963008
RFS1 and RFS2
Recirculating Feedwater Spray Systems
•
Increases flash steam condensing capability
•
Improves thermal efficiency of the feedtank
•
Improves deaeration within the feedtank
•
Energy saving three speed pump
Description
The Spirax Sarco RFS1 and RFS2 recirculating feedwater spray
systems are designed to provide additional flash steam condensing
capacity on boiler feedtank applications. When the condensate return
flowrate is high and the cold make-up flowrate is intermittent it is
likely that valuable flash steam will be lost through the vent. To
ensure that this flash steam is condensed it is often worthwhile to
take feedwater from a relatively cool part of the feedtank and pump it
to a spray nozzle. Approximately 20% of the feedtank content can
be circulated per hour to provide this additional flash condensing
capacity. By using a low energy pump the thermal efficiency of the
feedtank can be improved.
The RFS1 and RFS2 systems are specifically designed for use with
Spirax Sarco flash condensing deaerator heads. The mixing unit of
each head is fitted with a connection for the spray nozzle.
4
Application
System components
System Isolating
Y-Type
strainer
Fig 12
1" BSP
Fig 12
11⁄4" BSP
Material
Pump
RP1
1" BSP
240 V
50 Hz
RP2
11⁄4" BSP
240 V
50 Hz
Spray
nozzle
1" BSP male
taper
1" BSP male
taper
type
RFS1
RFS2
Materials
No. Part
1
Isolating valve
2
Y-type strainer
3
Electric pump
4
Spray nozzle
valve
M10
1" BSP
M10
11⁄4" BSP
Carbon steel with stainless steel internals
SG iron with stainless steel screen
Cast iron with stainless steel internals
Stainless steel
Limiting conditions
The system is designed for pumping water up to 100°C from an
atmospherically vented tank. Maximum ambient temperature 80°C.
Selection
A system is selected based on circulating approximately 20% of the
feedtank contents.
1
2
Gross feedtank
contents
litre (kg)
£ 3 000
3000 to 6000
6000 to 8000
8 000 to 10 000
10 000 to 30 000
Recirculating feedwater
spray systems
Designation
Speed setting
1
2
3
2
3
3
1
© Copyright 2004
How to order
Example: 1 off Spirax Sarco RFS1 recirculating feedwater spray
system.
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.
