KDN 40 (2 900 rpm) – horizontal DIN-EN 733 pump, mounted on a baseplate, DN 40

Name: KDN 40 (2 900 rpm) – horizontal DIN-EN 733 pump, mounted on a baseplate, DN 40
Brand: Pokorny Industries
SKU: 406

Standardized single-stage pump to DIN-EN 733, mounted on a baseplate with a flexible coupling. DN discharge 40 / DN suction 65. 2-pole (2 900 rpm). 4 casing sizes, choice of motor. GG25 cast iron, AISI 420 shaft.

Product description

KDN 40 (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. Nominal discharge port diameter DN 40, suction port diameter DN 65. Flanged connection PN 16 according to 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/carborundum mechanical seal with Viton O-rings in accordance with DIN 24960. Gland packing (PTFE-impregnated ramie) available on request.

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

Main technical specifications

Parameter	Value
Model series	KDN 40 (2 900 rpm) (SACI pumps)
Standard	DIN-EN 733 (ex DIN 24255)
Design	mounted on a baseplate with flexible coupling
Number of poles	2 poles (2 900 rpm)
DN discharge / suction	40 / 65
Flow rate range Q	up to 60 m³/h (2P) / up to 30 m³/h (4P)
Head range H	up to 95 m (2P) / up to 23 m (4P)
Motor power P2	0,25–22 kW (depending on configuration)
Power supply	230/400 V (up to 2,2 kW) · 400 V (above 2,2 kW)
Pumped fluid temperature	-10 °C to +140 °C
Max. ambient temperature	40 °C
Max. operating pressure	16 bar
Flanges	PN 16 DIN 2533
Casing material	GG25 cast iron (UNI ISO 185)
Impeller material	GG25 cast iron (bronze on request)
Shaft material	AISI 420 stainless steel
Mechanical seal	carbon/carborundum, Viton, DIN 24960
Gland packing	PTFE-impregnated ramie (on request)

Available pumps (bare shaft)

Casing	Number of poles	Bare shaft weight
KDN 40-125	2P	39 kg
KDN 40-160	2P	41 kg
KDN 40-200	2P	49 kg
KDN 40-250	2P	57 kg

(The hydraulic end is identical to the NKP-G 40 / NKM-G 40. For help selecting the exact casing and motor, contact us.)

Applications

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

Key benefits

DIN-EN 733 – standardized dimensions, interchangeable with products from other manufacturers.
Motor options – 2P, power to suit requirements, easy replacement.
4 casing sizes – covering a wide range of operating points.
Bare-shaft design – can be connected to a customer-supplied drive.
AISI 420 shaft – enhanced resistance to corrosion and wear.
Gland packing – an alternative to a mechanical seal.

Supply configurations

Bare shaft (code 0) – hydraulic section only, without coupling or motor.
Pump on baseplate without motor – pump with coupling mounted on a baseplate.
Complete assembly (code 1/2) – pump with motor and a standard or spacer coupling.

Optional accessories

Bronze impeller GCuSn5Zn5Pb5 (design B)
Wear rings (Wr) – extended service life
Alternative seals – SiC/Viton, SiC/EPDM, bellows seals
Gland packing – PTFE-impregnated ramie

The hydraulic section is identical. The KDN 40 (2 900 rpm) mounted on a baseplate offers a choice of motor, easier servicing and higher power ratings. The NKP-G 40 / NKM-G 40 in monobloc design are more compact. The KDN also uses an AISI 420 shaft and a Viton seal.

KDN pumps come with a 24-month warranty.

Features

Feature	Value	Unit
DNA = input / suction	65	DN
DNM = output / displacement	40	DN
Flow rate Q	0 to 60	m³/h
Displacement range H	0 to 95	m
Temperature of the pumped medium	-10 to 140	°C