Grundfos Inline single stage pump TPED 100-90/4 S-A-F-A-BQQE-IWA

Single-stage, close-coupled, volute twin-head pump with in-line suction and discharge ports of identical diameter. The
twin-head pump is designed with two parallel power-heads. The pump is of the top-pull-out design, i.e. the power
head (motor, pump head and impeller) can be removed for maintenance or service while the pump housing remains
in the pipework.
Each power head is fitted with an unbalanced rubber bellows seal. The shaft seal is according to EN 12756. Pipework
connection is via PN 16 DIN flanges (EN 1092-2 and ISO 7005-2).
Each power head is fitted with a fan-cooled, permanent-magnet synchronous motor of identical size. The motor
efficiency is classified as IE5 in accordance with IEC 60034-30-2.
The motor includes a frequency converter and PI controller in the motor terminal box. This enables continuously
variable control of the motor speed, which again enables adaptation of the performance to a given requirement. The
pump is fitted with a differential pressure sensor. The pump is suitable for applications requiring pressure control. The
pump is fitted with a differential-pressure transmitter registering the differential pressure across the pump and
enabling constant pressure or proportional-pressure control of the pump.
A cable ensures communication between the two power heads. The selector switch in the terminal boxes enables
changeover between the operating modes “alternating operation” and “standby operation”.
The product’s minimum efficiency index (MEI) is greater or equal to 0.70. This is by the Commission Regulation (EU)
considered as an indicative benchmark for best-performing water pump available on the market as from 1 January
2013.
A control panel enables setting of required setpoint as well as setting of pump to “Min.” or “Max.” operation or to
“Stop”.
The control panel has indicator lights for “Operation” and “Fault”.
Communication with the pump is possible by means of the Grundfos GO Remote (accessory).
The remote control enables further settings as well as reading out of a number of parameters such as “Actual value”,
“Speed”, “Power input” and total “Power consumption”.
Pump
1: Pump housing
2: Impeller
3: Stub shaft
4: Pump head/motor stool
5: Wear rings
The twin-head pump is designed with two parallel power-heads. A non-return flap valve in the common discharge port
is opened by the flow of the pumped liquid and prevents backflow of liquid into the idle pump head.
The pump housing is provided with a replaceable brass neck ring to reduce the amount of liquid running from the
outlet side of the impeller to the inlet side.
The impeller is secured to the shaft with a nut.
The pump is fitted with an unbalanced rubber bellows seal with torque transmission across the spring and around the
bellows. Due to the bellows, the seal does not wear the shaft, and the axial movement is not prevented by deposits
on the shaft.
Seal faces:
• Rotating seal ring material: silicon carbide (SiC)
• Stationary seat material: silicon carbide (SiC)
This material pairing is used where higher corrosion resistance is required. The high hardness of this material pairing
offers good resistance against abrasive particles.
Secondary seal material: EPDM (ethylene-propylene rubber)
EPDM has excellent resistance to hot water. EPDM is not suitable for mineral oils.
A circulation of liquid through the duct of the air vent screw ensures lubrication and cooling of the shaft seal.
The pump housing has four Rp 1/8 tappings for mounting of automatic air vents. Fit an air vent to the upper pump
housing if the twin-head pump is to be installed in a horizontal pipeline with horizontal pump shaft.