1-2-3-KV-50

Summary

Product identification

• DAB PUMPS Pressure Units
• Utilize "KV" type multi-impeller vertical axis electric pumps.
• Designed for high efficiency, application versatility, and very low noise operation.
• Available in 1, 2, or 3 pump configurations (e.g., 1 KV 50, 2 KV 50, 3 KV 50).
• Optional KV 3 jockey pump for compensation function.
• Optional weekly test run system (must be requested at time of order).

Mechanical / hydraulic

• Pumps: 1, 2, or 3 vertical multistage electric pumps, KV 50 type.
• Skid: Galvanised steel complete with 4 rubber anti-vibration feet.
• Manifolds: Flanged suction and discharge manifolds in galvanized steel, complete with blank flange.
  • 1 KV 50 models: DN 80 - PN 16 or DN 80 - PN 25.
  • 2 KV 50 models: DN 125 - PN 16 or DN 125 - PN 25.
  • 3 KV 50 models: DN 150 - PN 16 or DN 150 - PN 25.
• Valves:
  • Isolator valves on suction and discharge.
  • Flanged check valve on suction side.
• Connections: Antivibration flexible coupling for connection to discharge pipe (Note: 1-2-3 KV 50/7, 1-2-3 KV 50/6, 1-2-3 KV 50/8, 1-2-3 KV 50/9 pump sets are supplied without flexible couplings).
• BY-PASS circuit: Complete with isolator valve and automatic safety valve.
• Instrumentation: Radial pressure gauge with isolator valve.
• Control Panel Mounting: Galvanized steel column for adjustable mounting of the control panel.
• Pressure Tanks: Membrane pressure tanks (Note: 1-2-3 KV 50/7, 1-2-3 KV 50/6, 1-2-3 KV 50/8, 1-2-3 KV 50/9 pump sets are supplied without membrane pressure tanks).
• Jockey Pump (Compensation Function): Available with KV 3 jockey pump (e.g., KV 3/12 T, KV 3/15 T, KV 3/18 T) complete with valves and connected to suction and discharge manifolds. Cuts in to compensate for small quantity water demand.
• Dimensions and Weights: See the official PDF for exact tabulated values for models 1 KV 50, 2 KV 50, and 3 KV 50.

Electrical

• Control Panel Cabinet: Sheet steel with IP 55 protection rating and lever handle with lock.
• Starting Methods:
  • Direct Starting for unit power ratings up to 7.5 kW inclusive.
  • Star-Delta starting for unit power ratings up to 9.2 kW inclusive.
• Control Circuit: Low voltage (24 Volt) feeding remote motor protectors.
• Features:
  • Door lock switch.
  • Remote motor protectors with thermal relays and electric pump fuses.
  • Adjustable delayed pumps stop time (supplementary run).
  • System to change starting sequence for sets of 2-3 electric pumps.
  • Selector for Automatic (via pressure switches on discharge manifold) or Manual operation.
  • Terminal board for connection of minimum pressure switch for pump stopping, float switch to protect against dry running, remote pump start command.
• Control Pressure Switches: Precalibrated and installed on the discharge manifold; operate remote motor protectors to invert electric pumps in cascade mode.
• Jockey Pump Electrical Control:
  • For 1-2 K sets: Electric control and protection circuit in main electric pump control cabinet.
  • For 3 K pump sets: Separate control cabinet.
• Weekly Test Run System (Optional):
  • Composed of a programmable weekly timer, an audible/illuminated alarm, a drain solenoid valve on the discharge manifold, an automatic reset emergency stop pushbutton, and a minimum pressure switch.
  • Starts electric pumps periodically for a few minutes to prevent mechanical seizure during prolonged disuse.
  • Signals faults at the end of the test via the alarm function.
• Voltage: 3x400 V ~ (50 Hz).
• P2 Nominal, In A, Pressure Switch Setting, Max Pressure Obtainable: See the official PDF for exact tabulated values for models 1 KV 50, 2 KV 50, and 3 KV 50.

Operating limits

• Pressure Switch Setting: Ranges from 5÷7 BAR to 18÷20 BAR depending on the model.
• Max Pressure Obtainable: Ranges from 8.6 BAR to 26 BAR depending on the model.
• Manifold Pressure Rating: PN 16 or PN 25.

Disclaimer: This summary is based on extracted text and may miss figures, footnotes, or the latest revisions. Contractual data must always match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror