TP
, TPE
pump
s
TPE E-circulators
7
13
Mechanical shaft seal
Three types of unbalanced mechanical shaft seal are
available as standard:
•
BUBE
The BUBE shaft seal is a Grundfos rubber bellows
seal with tungsten carbide/carbon seal faces and
secondary seals of EPDM (standard seal).
•
RUUE
The RUUE shaft seal is a Grundfos O-ring seal with
reduced tungsten carbide/tungsten carbide seal
faces and secondary seals of EPDM.
•
AUUE
The AUUE shaft seal is a Grundfos O-ring seal with
fixed seal driver, tungsten carbide/tungsten carbide
seal faces and secondary seals of EPDM.
Information on a selection of common pumped liquids
with recommended shaft seals is shown on page 11.
Shaft seal specification
Special shaft seals are available for partly conditioned
water or other liquids containing abrasive or
crystallizing particles. See page 11.
Connections
Pumps up to 2” discharge has US standard flanges;
3” and higher discharge flanges are 125 lb. ANSI
connection.
Control
Electronically controlled TPE pumps are suitable for
demand-dependent performance control.
TPE pumps have the following features and
benefits:
Unbalanced shaft
seal
TPE
Version NU according to EN
12756
Shaft diameter
12 and 16 mm
Rubber bellows
EPDM
Seal faces
Tungsten carbide/carbon
Tungsten carbide/
tungsten carbide
Silicon carbide/
silicon carbide
Optimized hydraulics for high efficiency
- reduced power consumption.
TPE pumps with built-in variable frequency drive
- 2-pole and 4-pole TP pumps from 0.33 to 1.5 Hp
single phase are available as TPE pumps with
variable frequency drive. For further information,
see page 22.
Top-pull-out design
- easy dismantling in case of service.
In-line design
- contrary to end-suction pumps, in-line pumps
allow a straight pipework and thus often reduced
installation costs.
Pump housing and pump head are electrocoated
- high corrosion resistance.
Electrocoating includes:
1. Alkaline cleaning
2. Pre-treatment with zinc phosphate coating
3. Cathodic electrocoating (epoxy)
4. Curing of paint film at 392-482 °F (200-250 °C).
For low-temperature applications at a high
humidity, Grundfos offers pumps with extra
surface treatment to avoid corrosion. These
pumps are available on request.
Stainless steel impeller and neck ring
- wear-free operation with high efficiency.
E-circulator.book Page 13 Friday, October 7, 2011 4:01 PM