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VS ZJ Series - User Manual

VS ZJ Series
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Operating instruction
English translation of original operating
instructions
Documentation
It is imperative to read the operating instructions
prior to commissioning!
This document as well as all documents included in
the appendix is not subject to any update service!
Subject to technical changes.
-- ZJ, ZJP Series
Roots Vacuum Pump

Table of Contents

Questions and Answers

  • O
    Olivia ChurchAug 13, 2025
    Why VS Water Pump does not start?
    • W
      William MitchellAug 13, 2025
      Your VS Water Pump might not start due to several reasons. It could be that the motor is connected incorrectly, so ensure it's properly connected. A faulty pressure switch could also be the culprit, requiring replacement. If the oil is too thick, try changing it or warming both the oil and the pump. If the motor rotor is malfunctioning or the pump has seized up due to damaged components like impellers, bearings, or gearwheels, after sales service is required.
  • L
    Lisa MooreAug 17, 2025
    How to reduce noise of a VS Water Pump?
    • K
      Keith WilliamsAug 17, 2025
      If your VS Water Pump is excessively loud, it could be due to several reasons. The clearance between the casing and impellers might be too small because of contamination or pump distortion; in this case, clean the pumping chamber and ensure that the pump's feet and connecting lines aren’t placing a strain on it. Damaged bearings or gearing, impellers striking the casing, or a rotor running out of true could also be responsible. In these cases, after sales service is required, and you should switch off the pump immediately.
  • V
    Victoria WilliamsAug 25, 2025
    Why is the power consumption of my VS Water Pump motor too high?
    • S
      schmittashleyAug 25, 2025
      If your VS Water Pump motor's power consumption is too high, refer to the troubleshooting steps for a pump that gets too hot. Also, ensure that the motor is connected to the correct voltage supply. The motor itself might be malfunctioning, requiring repair or replacement. Thick oil can also contribute to this issue, so consider exchanging the oil or warming up the oil and the pump.
  • M
    Melissa LongAug 28, 2025
    What to do if VS ZJ Water Pump pumping speed is too low?
    • O
      omarcampbellAug 28, 2025
      If the pumping speed of your VS Water Pump is too low, consider the following: ensure the motor is correctly connected. If the motor is faulty, after sales service is required. Check for leaks in the pump or pump system and seal them. Also, clean or repair the overflow valve if it does not close. Finally, ensure that the intake and discharge lines are of sufficient diameter to avoid high flow resistance.
  • P
    Peter SmithAug 31, 2025
    Why does the oil in my VS ZJ turn dark?
    • M
      Mrs. Kathy MeyersAug 31, 2025
      The oil in your VS Water Pump might turn dark because it has broken down. In this case, you should change the oil. Also, refer to the troubleshooting steps for a pump that gets too hot and after solving the problem change the oil.
  • C
    Cynthia HendersonSep 4, 2025
    What causes oil in the pumping chamber of a VS ZJ Water Pump?
    • R
      Raven WebbSep 4, 2025
      If there's oil in the pumping chamber of your VS Water Pump, it could be due to several reasons: the oil level might be too high, so drain lubricant to reach the correct oil level. Oil might be leaking out of the system, so check the system. The pump might not be installed on a flat horizontal surface, so install pump correctly. There could be an external leak, so check the proper fit of oil-fill and oil-drain plugs and replace gaskets if necessary. In case of an internal leak or malfunctioning impeller rings, after sales service is required.
  • A
    andreareidSep 8, 2025
    What to do if VS Water Pump loses oil?
    • S
      Steven SummersSep 8, 2025
      If your VS Water Pump is losing oil and the oil leak is visible because the oil drain plug is not tight, drain the lubricant, firmly screw in the oil drain plug with a new gasket, and fill in the correct quantity. Also, refer to the troubleshooting steps for 'oil in the pumping chamber'.
  • B
    Brenda DelgadoNov 20, 2025
    What to do if my VS Water Pump gets too hot?
    • D
      Deborah ParkerNov 20, 2025
      If your VS Water Pump is overheating, several factors could be responsible. The ambient temperature might be too high, or the cooling water supply could be obstructed; consider installing the pump in a more suitable location or ensuring adequate cooling water. The pump might be working in the wrong pressure range, or the pressure differential might be too great, so check the pressure values of the vacuum system. High gas temperature is another possibility, so inspect the vacuum system. Contamination or distortion of the pump can reduce the clearance between the casing and impellers; clean the pumping chamber and make sure the feet and connecting lines aren’t straining the pump. Other causes include excessive frictional resistance from contaminated bearings or oil (exchange the oil), incorr...

VS ZJ Series Specifications

General IconGeneral
BrandVS
ModelZJ Series
CategoryWater Pump
LanguageEnglish