Vortex pump Rexa PRO series

for wastewaterelectricsubmersible

Overview
The fully submersible sewage pump designed for stationary and portable wet installation as well as for stationary dry installation. It can be used in continuous operation or intermittent periodic duty.

Key features

• Highly effective thanks to efficiency-optimized single-channel impellers
• Safe to operate due to low-clogging vortex impellers
• Verified safety: Ex-rated in accordance with ATEX as standard
• Energy-efficient IE3 motor technology available as an option

Design
The pump is available with vortex impeller or semi-open single-channel impeller. Horizontal discharge port with flange connection. Hydraulics housing and impeller made of cast iron. Surface-cooled motor with winding temperature monitoring and internal moisture probe (depending on motor type). Oil-filled sealing chamber with two mechanical seals. Connection cable with bare cable ends; single-phase versions supplied with capacitor switchgear. Ex-certified as standard.

Liquid / Applications

• For pumping in commercial areas of: sewage containing faeces
• wastewater (with a small proportion of sand and gravel)
• sludge with a maximum dry matter content of 8% (depending on hydraulics selected)

Equipment / Function

• Certified explosion approval in accordance with ATEX
• Winding temperature monitoring with bimetallic sensor
• Leakage detection for the motor compartment (P 13 motor only)
• Connection cable with bare cable ends
• Single-phase version with capacitor switchgear

Type key (explanation of model designation)
Example: Rexa PRO-V06-212A/21M015X540/O
Rexa = Submersible sewage pump
PRO = Series
V = Impeller shape: V = vortex impeller, C = single-channel impeller
06 = Nominal diameter of the discharge port (05 = DN 50, 06 = DN 65/80, 08 = DN 80, 10 = DN 100)
21 = Performance indicator
2 = Characteristic curve number
A = Identifier for material and coating type
2 = Number of poles
1 = Motor efficiency class (derived from IEC 60034-30): 1 = IE1, 3 = IE3
T = Mains connection version: M = single-phase AC, T = three-phase AC
015 = Value/10 = rated power P2 in kW (e.g. 015 = 1.5 kW)
X = Certified explosion approval in accordance with ATEX
5 = Mains frequency: 50 Hz
40 = Rated voltage code (23 = 230 V, 40 = 400 V)
O = Connection cable with bare cable ends

Scope of delivery

• Pump
• Installation and operating instructions

Options

• IE3 motors
• Thermal winding monitor with PTC sensor
• Motor winding in insulation class "H"
• Static seals in FKM (FPM)
• Ceram C0 coating for housing and impeller to protect against corrosion
• Special voltages

Caractéristiques / spécifications techniques

• Mains connection: 1~230 V, 50 Hz or 3~400 V, 50 Hz
• Submerged operating mode: S1
• Non-immersed operating mode (P 13 motor only): short-time duty S2-30 min; intermittent periodic duty S3 25%
• IP rating: IP68
• Insulation class: F
• Fluid temperature: 3 to 40 °C (37 to 104 °F)
• Fluid temperature, max. 60 °C (140 °F) for 3 min
• Max. immersion depth: 20 m (66 ft)
• Motor housing: EN-GJL-250 (ASTM A48 Class 35/40B)
• Hydraulics housing: EN-GJL-250 (ASTM A48 Class 35/40B)
• Impeller: EN-GJL-250 (ASTM A48 Class 35/40B)
• Static seals: NBR (nitrile)
• Seal on pump side: SiC/SiC
• Seal on motor side: C/MgSiO4
• Shaft end: Stainless steel 1.4021 (AISI 420)