Rainwater Unit Delta: 3. Dual pump booster system

Overview

The dual-pump booster must be selected according to pressure and flow rate requirements and the desired ease of operation.

Item number

ESPA DPA Aspri 15-5 DT 1505
2 self-priming centrifugal pumps
analogue control system for alternate startup and activation of both pumps to cover peak-load demand
isolated output
1 1⁄2“ connection (inside thread) suction and discharge ends
expansion vessel
Q max = ca. 110 l/min H max = 54 m
ESPA DPA Aspri 25-5 DT 2505
2 self-priming centrifugal pumps
analogue control system for alternate startup and activation of both pumps to cover peak-load demand
isolated output
1 1⁄2“ connection (inside thread) suction and discharge ends
expansion vessel
Q max = ca. 183 l/min H max = 57 m
Lowara GXS 20/2 HM7 DT 1505
2 horizontal normal priming centrifugal pumps
control with automatic alternate startup and activation of both pumps to cover peak-load demand
Connection: suction end 2“, discharge end 1 1⁄2“
optional: expansion vessel
Q max = 140 l/min Q = 40 – 140 L/min H = 52,5 – 25 m H max = 59 m
Lowara GTKS 20/2 HM7 ZT with Teknospeed DT 2022
2 horizontal normal priming centrifugal pumps with Teknospeed electronic speed control system
automatic alternate startup and activation of both pumps to cover peak-load demand
isolated output
connection: suction end 2“, discharge end 1 1⁄2“
optional: expansion vessel
Q max = 140 l/min Q = 40 – 140 L/min H = 52,5 – 25 m H max = 59 m
GT 20 HV LC 5SV08 F011T with Hydrovar DT 2005
2 normal priming, vertical 8-stage centrifugal pumps 5SV08F011T made of stainless steel with three phase motor (3 x 400 V)
with Hydrovar electronic speed control system
automatic alternate start up
isolated output
expansion vessel (24 litres)
connection: suction end, discharge end 1 1⁄4"
Q max = 284 l/min Q = 40 – 142 l/min (single pump) H = 57.6 – 25.8 m

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