Rexa SOLID

Design

Application

Liquid

For pumping in commercial areas of:

• Untreated sewage
• Sewage containing faeces
• Process sewage
• Fluids with dry matter up to max. 8 %

Equipment/function

• Heavy-duty cast iron design.
• Sealing chamber to collect any leakage from the mechanical seal on the fluid side.
• Leakage chamber to collect any leakage from the mechanical seal on the motor side (motor size 20 only).
• Motor monitoring with integrated Digital Data Interface:
  • Winding temperature with PTC and Pt100 sensors.
  • Leakage detection for sealing chamber and leakage chamber with capacitive sensor.
  • Vibration sensor
  • Data logger
  • Web server
  • Ethernet interface
• Nexos Intelligence, from easy pump monitoring to an intelligent pump control system with up to four pumps:
  • "Device Control (DC)" system mode: control mode for pump and variable frequency drive (controlled by the pump) with clogging detection.
  • "System Intelligence (SI)" system mode: Full control of an overall pumping station with up to four pumps, including clogging detection. A variable frequency drive drives each pump. One pump operates as the primary pump. The primary pump controls all other pumps depending on the system parameters.
  • The standard DC system mode is free of charge. The SI system mode can be activated with a licence key.

Type key

Technical data

• Mains connection:
  • AFC/TFC motor: 3~380 up to 460 V, 50/60 Hz
  • FKT/T motor: 3~400 V, 50 Hz
• Operating mode, wet installation:
  • T/TFC/FKT motor: continuous duty (S1)
  • AFC motor: not possible
• Operating mode, wet installation with non-immersed motor:
  • AFC motor: not possible
  • T motor: 15 minutes short-time duty (S2-15) or 30 minutes short-time duty (S2-30)
  • TFC motor: 5 minutes run time, 5 minutes break (S3 50% intermittent periodic duty)
  • FKT motor: continuous duty (S1)
• Operating mode, dry installation:
  • AFC motor: continuous duty (S1)
  • T/TFC motor: not possible
  • FKT motor: continuous duty (S1)
• IP rating: IP68 (permanently submerged)
• Insulation class: H
• Fluid temperature: 3 … 40 °C (37 … 104 °F)
• Max. immersion depth: 20 m (66 ft)

Materials

• Hydraulic housing: EN-GJL-250 (ASTM A48 Class 35/40B) or EN-GJS-500-7 (ASTM A536 70-50-05)
• Impeller: EN-GJS-500-7 (ASTM A536 70-50-05)
• Motor housing: EN-GJL-250 (ASTM  A48 Class 35/40B)
• Seals:
  • Static: FPM (FKM)
  • On the fluid side: SiC/SiC
  • On motor side: SiC/SiC
• Shaft: Stainless steel 1.4021 (AISI 420)

Construction

Hydraulics

Non-self-priming centrifugal hydraulics with a closed or semi-open SOLID impeller. The horizontal discharge port has a flange connection. The pump housing and impeller are made of grey cast iron. The maximum dry solids content in the fluid is 8 %.

AFC motor

The AFC motor is a surface-cooled submersible permanent magnet motor without a separate cooling system. The motor housing is made of cast aluminium. The motor is designed for dry installation in continuous duty. Wet installation is not permitted.

The motor housing transfers the motor's waste heat directly to the pumped fluid and to the air. The motor compartment stays dry. Permanently lubricated rolling bearings support the motor shaft. A block seal cartridge (with two mechanical seals) seals the fluid side and the motor side. The power cable and the control cable are designed for heavy-duty applications and have bare cable ends. The power cable is longitudinally watertight.

The motor has an integrated variable frequency drive and a Digital Data Interface. The Digital Data Interface monitors the motor and controls the variable frequency drive. The variable frequency drive drives the motor. Three bimetallic sensors in the motor winding provide hardware-based shutdown with reactivation lock.

TFC motor

The TFC motor is a surface-cooled submersible permanent magnet motor without a separate cooling system. The motor housing is made of grey cast iron. The motor is designed for wet installation in continuous duty and for intermittent periodic duty when not immersed. Dry installation is not permitted.

The motor housing transfers the motor's waste heat directly to the fluid. The motor compartment stays dry. Permanently lubricated rolling bearings support the motor shaft. A block seal cartridge (with two mechanical seals) seals the fluid side and the motor side. The power cable and the control cable are designed for heavy-duty applications and have bare cable ends. The power cable is longitudinally watertight.

The motor has an integrated variable frequency drive and a Digital Data Interface. The Digital Data Interface monitors the motor and controls the variable frequency drive. The variable frequency drive drives the motor. Three bimetallic sensors in the motor winding provide hardware-based shutdown with reactivation lock.

T motor

The T motor is a surface-cooled submersible permanent magnet motor without a separate cooling system. The motor is designed for continuous duty in wet installations. The housing parts transfer the motor’s waste heat directly to the fluid. The motor itself is dry. The motor bearings are permanently lubricated rolling bearings. Two independent mechanical seals seal the fluid side and the motor side. The connection cables are longitudinally watertight and have bare cable ends. The motor housing is made of grey cast iron. Depending on the motor size and power, the motor can be installed dry and operated in short-time duty.

The motor has an integrated Digital Data Interface. The Digital Data Interface monitors and controls the pump and the external Wilo-EFC variable frequency drive. The external Wilo-EFC variable frequency drive drives the motor. The motor has two PTC sensors that provide a hardware-based shutdown through the Safe Torque Off (STO) function of the Wilo-EFC.

FKT motor

The FKT motor is a self-cooling submersible permanent magnet motor with an active cooling system. The motor is designed for continuous duty in wet and dry installations. The cooling system has a closed cooling circuit. The coolant is a mixture of water and glycol. An impeller driven by the motor shaft continuously circulates the coolant. The cooling system is unpressurised when cold. A built-in pressure relief valve limits the maximum operating pressure to 3 bar (43 psi). The cooling flange transfers the waste heat to the pumped fluid. The motor bearings are permanently lubricated rolling bearings. Two independent mechanical seals seal the fluid side and the motor side. The connection cables are longitudinally watertight and have bare cable ends. The motor housing is made of grey cast iron

The motor has an integrated Digital Data Interface. The Digital Data Interface monitors and controls the pump and the external Wilo-EFC variable frequency drive. The external Wilo-EFC variable frequency drive drives the motor. The motor has two PTC sensors that provide a hardware-based shutdown through the Safe Torque Off (STO) function of the Wilo-EFC.

Operating fluids

• Medical grade white oil
• Water-glycol mixture (35 % glycol and 65 % water)

Motor efficiency classes (based on IEC 60034-30)

• The T and FKT motors meet the IE4 (Super Premium efficiency) efficiency level.
• The AFC and TFC motors meet the IE5 (Ultra Premium efficiency) efficiency level.

Scope of delivery

• Pump with permanent magnet motor:
  • Motor T 17.3, T 20.2 and FKT 20.2M: external Wilo-EFC variable frequency drive, ordered separately
  • Motor AFC/TFC 17.1: integrated variable frequency drive
• Media converter Single Pair Ethernet/Ethernet
• Accessories as ordered
• Installation and operating instructions

Options

• Special voltages
• Pumping fluids up to 60 °C (140 °F)
• Ceram coating for abrasive and corrosive fluids
• Ex-rated according to
  • ATEX
  • FM
  • IECEx

Accessories

• Suspension unit for stationary wet installation
• Foot elbow for stationary dry installation
• Level controls
• I/O modules to extend digital and analogue inputs and outputs
• Fixation sets with anchor bolts
• Slinging gear