Boiler house Feedtank ancillaries
2
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 without notice. © Copyright 2018
TI-P401-08 EMM Issue 4
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. Application 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. System components System type Isolating valve Y-Type strainer Pump Spray nozzle
2.1 5
4
RP1 1" BSP 240 V 50 Hz
1" BSP male taper 1" BSP male taper 50 Hz
M10 1" BSP
Fig 12 1" BSP
RFS1
1
RP2 1¼" BSP 240 V
2
M10 1¼" BSP
Fig 12 1¼" BSP
RFS2
3
1
Materials No. Part
Material
1 2 3 4
Isolating valve Carbon steel with stainless steel internals
Y-type strainer
SG iron with stainless steel screen
Electric pump Cast iron with stainless steel internals
Spray nozzle Stainless steel
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