NKV 1/14 S T Multistage centrifugal pump DAB.NKV

Product detailed description

Multistage centrifugal pumps like the IVAR NKV 1/14 S T are commonly installed in industrial settings such as power plants, chemical processing facilities, and large-scale HVAC systems. These units handle medium-to-high-pressure fluid transport across various stages, making them essential for applications requiring precise flow control and high head capacity. Installers often encounter these pumps in closed-loop systems where reliability and long-term performance are critical.

The design of the NKV 1/14 S T ensures it meets the demands of continuous operation under challenging conditions. Its construction allows it to handle fluids close to water in properties while maintaining structural integrity and operational efficiency even when exposed to fluctuating temperatures. It is suitable for environments where the liquid temperature varies significantly, which is typical in many industrial processes.

Technical parameters

Temperature range of the liquid	from -15 °C to +120 °C
Protection rating	IP55
Insulation class	F
Code	60188895
Brand	IVAR

The temperature range (-15 °C to +120 °C) is crucial when selecting this pump for applications involving cold or heated media. The IP55 rating indicates dust and water protection, suitable for outdoor or semi-industrial environments. The insulation class F means the motor can withstand higher thermal stress, prolonging its operational life in demanding conditions.

Installation and connection

When installing the IVAR NKV 1/14 S T, ensure the foundation is stable and level to avoid mechanical stress on the bearings. Connect the suction and discharge pipes using appropriate flanges or threaded fittings based on the system’s requirements. Verify that all pipe connections are tight and aligned to prevent vibration. Check the motor alignment with the pump shaft to avoid premature wear. Common errors include misalignment, incorrect mounting base preparation, and neglecting to secure all fasteners properly.

Compatibility and accessories

This pump is typically used alongside standard industrial piping systems, valves, and control panels. For optimal performance, ensure the installation includes proper filters and pressure gauges. Additional components such as motor starters and overload protection devices should be included in the electrical setup according to local standards. No specific alternative models are provided in the brief.

Technical background for designers

The pump operates via multiple impeller stages, each contributing to the total head generated. The use of stainless steel (AISI 304 and 431) and corrosion-resistant polymers ensures durability in aggressive environments. The closed rotor design and sealed bearings reduce maintenance needs and enhance reliability. The motor is air-cooled, which simplifies maintenance and avoids overheating risks. Integration into larger systems requires careful consideration of flow rates, system resistance, and electrical supply specifications.

Service and operation

Periodic inspection of bearing lubrication levels and seal integrity is recommended to maintain performance. Check for unusual noise or vibrations during operation, which could indicate misalignment or wear. Ensure the cooling airflow around the motor is unobstructed. No specific service intervals are listed in the brief, so follow general industrial maintenance practices.

Frequently asked questions

Can the pump handle liquids with a viscosity similar to water?
Yes, the IVAR NKV 1/14 S T is suitable for non-viscous liquids with properties close to water. It is not intended for highly viscous or abrasive media.

Is the motor protected against electrical faults?
The motor requires external protection against short circuits and overloads using appropriate devices installed by the user according to applicable standards.

What type of sealing is used between the pump and motor?
A rigid two-part coupling connects the pump and motor shafts, ensuring direct drive transmission without slippage or misalignment.

Can this pump operate in sub-zero temperatures?
Yes, the pump is rated for operation with fluid temperatures as low as -15 °C, provided the liquid remains non-freezing and non-crystallizing.