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KDN 32 (2900 rpm) – horizontal DIN-EN 733 pump, on baseplate, DN 32

Standardized single-stage pump DIN-EN 733 on a baseplate with flexible coupling. DN discharge 32 / DN suction 50. 2-pole (2 900 rpm). 6 casing sizes, choice of motor. GG25 cast iron, AISI 420 shaft.

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Product description

KDN 32 (2 900 rpm) is a standardized horizontal single-stage pump in accordance with DIN-EN 733, supplied mounted on a baseplate with a flexible coupling. The nominal diameter of the discharge port is DN 32 and that of the suction port is DN 50. Flange connection: PN 16 in accordance with DIN 2533.

Volute casing made of GG25 cast iron (UNI ISO 185), shaft made of AISI 420 stainless steel. Impeller made of GG25 cast iron, dynamically balanced. Standard carbon/silicon carbide mechanical seal with Viton O-rings in accordance with DIN 24960. Stuffing box packing (PTFE-impregnated ramie) available on request.

Available as a hydraulic section / wet end (bare shaft), a pump mounted on a baseplate without a motor, or a complete unit with motor. 2-pole motor (2 900 rpm). Liquid temperature -10 °C to +140 °C, max. operating pressure 16 bar.

Main technical specifications

ParameterValue
Model rangeKDN 32 (2 900 rpm) (SACI pumps)
StandardDIN-EN 733 (ex DIN 24255)
Designmounted on a baseplate with a flexible coupling
Number of poles2 poles (2 900 rpm)
DN discharge / suction32 / 50
Flow rate range Qup to 48 m³/h (2P) / up to 18 m³/h (4P)
Head range Hup to 96 m (2P) / up to 16 m (4P)
Motor power P20,37–15 kW (depending on configuration)
Power supply230/400 V (up to 2,2 kW) · 400 V (above 2,2 kW)
Pumped liquid temperature-10 °C to +140 °C
Max. ambient temperature40 °C
Max. operating pressure16 bar
FlangesPN 16 DIN 2533
Casing materialGG25 cast iron (UNI ISO 185)
Impeller materialGG25 cast iron (bronze on request)
Shaft materialAISI 420 stainless steel
Mechanical sealcarbon/silicon carbide, Viton, DIN 24960
Stuffing box packingPTFE-impregnated ramie (on request)

Available pumps (bare shaft)

CasingNumber of polesBare shaft weight
KDN 32-125.12P37 kg
KDN 32-1252P36 kg
KDN 32-160.12P38 kg
KDN 32-1602P38 kg
KDN 32-200.12P46 kg
KDN 32-2002P46 kg

Contact us for the exact selection of casing and motor.

Applications

  • Water supply – water supply systems, pressure boosting stations.
  • Heating and air conditioning – hot and chilled water circulation in HVAC systems.
  • Industrial piping – process water, process circuits.
  • Agriculture – irrigation, transfer pumping.
  • Special applications – thanks to the choice of motor and seal for non-standard conditions.

Main benefits

  • DIN-EN 733 – standardised dimensions, interchangeable with products from other manufacturers.
  • Choice of motor – 2P, power rating to suit requirements, easy replacement.
  • 6 casing sizes – wide range of operating points.
  • Bare shaft design – can be connected to a drive of your choice.
  • AISI 420 shaft – increased resistance to corrosion and wear.
  • Packing seal – an alternative to a mechanical seal for specific applications.
  • Bronze impeller available on request – for drinking water and food processing.

Supply configurations

  • Bare shaft (code 0) – hydraulic section only, without coupling or motor.
  • Pump on baseplate without motor – pump with coupling on a baseplate; the motor is supplied by the customer.
  • Complete assembly (code 1/2) – pump with motor on a baseplate, with a standard or spacer coupling.

Optional accessories

  • Bronze impeller GCuSn5Zn5Pb5 (version B)
  • Wear rings (Wr) – extended service life
  • Alternative seals – SiC/Viton, SiC/EPDM, bellows seals
  • Packing seal – PTFE-impregnated ramie
  • O-rings: POWERseal EPDM

FAQ

What is the difference between KDN 32 (2 900 rpm) and NKP-G 32 / NKM-G 32?

The hydraulic section is identical – the same volute casing and impellers in accordance with DIN-EN 733. The difference is in the design: KDN 32 (2 900 rpm) is mounted on a baseplate, with a choice of motor and easy servicing. NKP-G 32 / NKM-G 32 are enbloc – more compact, but the motor cannot be replaced independently. KDN also uses an AISI 420 shaft and Viton seals.

When should I choose KDN instead of enbloc?

Choose KDN when you need a choice of motor (power rating, manufacturer, special design), easy servicing (the motor and pump can be separated without disconnecting the piping), or higher power ratings than the enbloc range offers.

What is the warranty?

KDN pumps come with a 24-month warranty.

Features

Feature Value Unit
DNA = input / suction
50 DN
DNM = output / displacement
32 DN
Flow rate Q
0 to 48 m³/h
Displacement range H
0 to 96 m
Temperature of the pumped medium
-10 to 140 °C

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