DPL
Design
Glanded double pump in in-line design with flange connection
Application
For pumping heating water (in accordance with VDI 2035), water-glycol mixtures and cooling and cold water without abrasive substances in heating, cold water and cooling water systems
Type key |
Example |
DPL 40/160‐4/2 |
DPL |
In-line double pump |
40 |
Nominal diameter DN of the pipe connection |
160 |
Nominal impeller diameter |
4 |
Nominal motor power P2 in kW |
2 |
Number of poles |
Special features/product advantages
- High-efficiency motors as standard; from 0.75 kW nominal motor power: motors with IE2 technology
- Reduction of space required and installation costs due to double pump design
- Main/standby mode or peak-load operation (by means of external auxiliary device)
- Standard condensate drainage holes in the motor housings and lanterns
- High corrosion protection thanks to cataphoretic coating
- Series version: Motor with one-piece shaft
- Version N: Standard motor B5 or V1 with stainless steel plug shaft
- Bidirectional mechanical seal with forced flushing
- Easy to install thanks to feet with threaded holes on the pump housing for all flange-end pumps
Technical data
- Permissible temperature range -20 °C to +120 °C
- Mains connection 3~400 V, 50 Hz (others on request)
- Protection class IP 55
- Nominal diameter DN 32 to DN 100
- Max. operating pressure 10 bar (special version: 16 bar)
Description/Design
Single-stage, low-pressure double pump in in-line design with
- Switchover valve
- Mechanical seal
- Flange connection with pressure measuring connection R 1/8
- Motor with one-piece shaft
Materials
- Pump housing and lantern: EN-GJL-250
- Impeller: PP fibreglass-reinforced /EN‐GJL‐200 (depending on pump type)
- Shaft: 1.4021
- Mechanical seal: AQ1EGG; other mechanical seals on request
Scope of delivery
- Pump
- Installation and operating instructions
Options
- H5 variant with PN16 housing (at additional charge)
- Motors with efficiency class IE3, other voltages and frequencies, as well as ATEX approval on request
Accessories
- Mounting brackets for installation on a base
- PTC thermistor sensor, PTC resistor tripping relay
- Special motors
- Special mechanical seals
- Control systems CC-HVAC, VR-HVAC and switchgear
General Notes - ErP (Ecological Design-) Directive
- The benchmark for most efficient water pumps is MEI ≥ 0.70
- The efficiency of a pump with a trimmed impeller is usually lower than that of a pump with the full impeller diameter. The trimming of the impeller will adapt the pump to a fixed duty point, leading to reduced energy consumption. The minimum efficiency index (MEI) is based on the full impeller diameter.
- The operation of this water pump with variable duty points may be more efficient and economic when controlled, for example, by the use of a variable speed drive that matches the pump duty to the system.
- Information on benchmark efficiency is available at www.europump.org/efficiencycharts