Stratos-ZD 40/1-8 | Wilo
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Stratos-ZD 40/1-8

Technical data
Tender text

Wilo-Stratos ZD high-efficiency pump electronically controlled

Glandless twin-head pump with minimum operating costs, for pipe installation. For use in secondary hot water circulation systems (0 °C to +80 °C), heating, ventilation and air-conditioning applications (-10 °C to +110 °C). With built-in electronic power control for constant/variable differential pressure. One-button manual operation level for each pump as standard, for:

  • Pump on/off
  • Selecting the operating mode: Main/standby operation, parallel operation (efficiency-optimised peak load cut-in / deactivation)(accessories: 2 pcs. Stratos IF-modules necessary)
  • Selecting the control mode:
    • dp-c (differential pressure constant )
    • dp-v (differential pressure variable)
    • dp-T (differential pressure temperature-controlled) by means of IR-Monitor/IR-Module/IR-Stick, Modbus, BACnet, LON or Can
    • Q-Limit to restrict the maximum volume flow (setting only via IR-Stick)
    • Manual control mode (setting constant speed)
  • Automatic setback operation (self-learning)
  • Setpoint and speed adjustment

Graphical pump display for each pump, with rotatable display horizontal and vertical module mounting, for display of:

  • Operating state
  • Control mode
  • Differential pressure or rotation speed setpoint
  • Fault and alarm signals
  • Double-pump operating mode

Synchronous motor using ECM technology with very high efficiency and high starting torque, automatic deblocking function and built-in full motor protection.

Fault signal light, potential-free collective fault signal, infrared interface for wireless communication with Wilo IR-Monitor/IR-Stick operating and service device.

Plug-in slot for Wilo Stratos IF-modules with interfaces for building automation (BA) or dual pump management (accessories: 2 pcs IF-modules Stratos Modbus, BACnet, LON, CAN, PLR, Ext.Aus, Ext.Min, SBM, Ext.Aus/SBM or DP).

Pump housing made of cast iron, painted, impeller made of glass-fibre reinforced plastic, stainless steel shaft with resin-impregnated carbon plain bearings.

Flange versions:

  • Standard version for pumps DN 32 / DN 40: Combination flange PN 6/10 (flange PN 16 acc. to EN 1092-2) for counter flanges PN 6 and PN 16
  • Special version for pumps DN 32 / DN 40: Flange PN 16 (acc. to EN 1092-2) for counter flange PN 16
Operating data
Fluid temperature T -10 °C
Ambient temperature T -10 °C
Maximum operating pressure PN 10 bar
Minimum suction head at 50 °C m 3 m
Minimum suction head at 95 °C m 10 m
Minimum suction head at 110 °C 13 m
Max. permitted total water hardness 3.57 mmol/l (20°dH)
Motor data
Energy efficiency index (EEI) 0.23
Interference emission EN 61800-3;2004+A1;2012 /residential area (C1)
Interference immunity EN 61800-3;2004+A1;2012 /industrial environment (C2)
Mains connection 1~230 V, 50/60 Hz
Power consumption P1 max 300 W
Min. speed nmin 1400 1/min
Max. speed nmax 4800 1/min
Protection class motor IPX4D
Threaded cable connection 1 x PG7
Pump housing Cast iron
Impeller PPS-GF40
Shaft Stainless steel
Bearing Carbon-graphite
Installation dimensions
Pipe connection on the suction side DNs DN 40
Pipe connection on the discharge side DNd DN 40
Port-to-port length L0 220 mm
Ordering information
Brand Wilo
Product description Stratos-ZD 40/1-8
Net weight, approx. m 17 kg
Article number 2090479

Installation and operating instructions


Article Number 2132717
Edition 2016-04
Page format 148.2 x 209.9 mm
Number of pages 202
PDF (8 MB)

Certificate REACH (Documents)

REACH Regulation

Edition 2021-05
Page format 209.9 x 297.0 mm
Number of pages 4
PDF (212 KB)

Stratos-ZD 40/1-8 GG

DWG (2 MB)


STP (3 MB)


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