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Speck pumpen VH Series - User Manual

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Operating Instructions
VU / VH Series
VU 20 - 1600
VH 20 - 1600
Liquid Ring Vacuum Pumps
English translation of the original operating
instructions
Documentation
It is imperative to read the operating instruc-
tions prior to commissioning!
This document as well as all documents in-
cluded in the appendix is not subject to any
update service!
Subject to technical changes.
Speck Pumpen Vakuumtechnik GmbH
Regensburger Ring 6 – 8, 91154 Roth / Germany
PO Box 1453, 91142 Roth / Germany
Phone: +49 (0) 9171 809 0
Fax: +49 (0) 9171 809 10
E-mail: info@speck-pumps.de
Internet: www.speck-pumps.de
Issue:
10/2010
Supersedes issue:
06/2010
Doc./ Item no.:
1096.0799

Table of Contents

Questions and Answers

  • J
    Jon WilliamsonAug 16, 2025
    What to do if my Speck pumpen VH Water Pump motor protection is triggered?
    • J
      John MorganAug 16, 2025
      If the motor protection of your Speck pumpen Water Pump is triggered, it could be due to several reasons: * There may be a short-circuit in the motor winding. Check the motor winding. * The motor protection switch might not be correctly set or is defective. Check the setting or replace the switch. * The motor may be overloaded. Check and reduce the operating liquid flow rate. * There could be excessive backpressure in the outlet nozzle. Reduce backpressure. * There might be an excessive share of liquid in the suction flow. Reduce the share of liquid. * The suction-side fitting may be blocked. Open the suction-side fitting.
  • T
    Tiffany WatsonAug 20, 2025
    Why is my Speck pumpen Water Pump motor consuming excessive power?
    • T
      Thomas CastroAug 20, 2025
      Excessive power consumption in your Speck pumpen Water Pump motor can occur due to: * Motor overload: Check and reduce the operating liquid flow rate. * Excessive backpressure: Reduce backpressure in the outlet nozzle. * Excessive share of liquid: Reduce the share of liquid in the suction flow. * Blocked suction-side fitting: Open the suction-side fitting. * High density/viscosity: Use an operating liquid complying with the density recommended in the data sheet. * Impeller rubbing: Disassemble the pump and properly set the inter casing/impeller gap size. * Pump contamination/calcification: Flush, descale, or disassemble the pump and clean it.
  • N
    Nicole Peterson MDAug 25, 2025
    What to do if my Speck pumpen VH Water Pump is leaking?
    • R
      Rebecca DavisAug 25, 2025
      If your Speck pumpen Water Pump is leaking, consider the following potential causes: * A defective shaft sealing. Replace the shaft sealing. * A defective casing sealing. Provide the vacuum pump with new sealing. * Worn-out casing components. Replace the affected components. * Loosened connecting screws or screw plugs. Tighten the screws and replace the sealing.
  • Z
    Zachary TuckerAug 27, 2025
    Why is my Speck pumpen VH Water Pump not producing vacuum?
    • N
      Nancy JacksonAug 27, 2025
      If your Speck pumpen Water Pump is not producing vacuum, it could be due to: * A lack of operating liquid. Check the operating liquid supply. * A leak in the suction pipe. Check and seal the suction pipe and connections. * The wrong direction of motor rotation. Check the direction of rotation and swap the 2 phases if necessary.
  • H
    holly26Aug 30, 2025
    Why is my Speck pumpen VH not running smoothly?
    • W
      wilsonmichaelAug 31, 2025
      If your Speck pumpen Water Pump isn't running smoothly, here are some possible causes: * Excessive operating liquid flow rate: Reduce the operating liquid flow rate. * Overload in the pipe system: Check the pipe connections, pump fixation, and bearing clearance of the pipe clamps. * Air pocket in the pipe: Change the pipe system layout. * Pump distorted/improperly adjusted: Check and re-adjust the pump. * Resonance vibrations in the pipe system: Check the pipe connections and, if required, use a compensator. * Imbalanced impeller: Balance or replace the impeller. * Deposits on the impeller: Clean or replace the impeller. * Defective pump or motor bearing: Replace the pump or motor bearing.
  • M
    mossseanSep 7, 2025
    Why is my Speck pumpen VH making a strange noise?
    • M
      mhansonSep 8, 2025
      Strange noises from your Speck pumpen Water Pump can result from: * Pump cavitation: Install an anti-cavitation valve or equip the suction pipe with a ventilation valve. * Excessive steam: Reduce the share of steam or provide for condensation upstream the vacuum pump. * Suction-side fitting closed: Open the suction-side fitting or provide for cavitation protection. * Excessive operating liquid flow rate: Reduce operating liquid flow rate.
  • J
    jamie42Nov 11, 2025
    Why is my Speck pumpen Water Pump motor not starting?
    • S
      Selena YangNov 11, 2025
      There are several reasons why the motor of your Speck pumpen Water Pump may not be starting: * A phase of the power supply could be interrupted. Check the power supply and the motor. * The motor protection switch may have tripped. Try switching it on. * The motor might be blocked. Inspect the motor. * There might be corrosion inside impeller/inter casing. Use rust remover to overcome the blockage of the pump. * Ice could be inside the pump. Carefully heat up and defrost the pump. * Contaminations or foreign bodies may be present inside the pump. Flush or disassemble the pump and clean it. * The pump may have calcified. Descale the pump. * The impeller could be blocked or defective. Correct the gap size of the inter casing/impeller or replace it. * The motor bearing may b...

Summary

Important Basic Information

1.1 Target Groups

Defines responsibilities for operators and assemblers.

1.2 Applicable Documents

Lists relevant documents like ATEX instructions and declarations.

1.3 Warnings and Symbols

Explains danger, warning, caution levels and symbols.

1.4 Terminology

Defines key terms like Pump, Aggregate, Separator, etc.

Safety

2.1 Intended Use

Outlines proper usage and operational parameters.

2.2 Possible Misuse

Lists prohibited uses and potential risks.

2.3 General Safety Instructions

Covers product safety, operator obligations, and staff qualifications.

2.4 Residual Risks

Highlights risks like entanglement, flying objects, burns.

2.5 Special Risks

Covers risks in explosive areas and with dangerous media.

Design and Functioning

3.1 Marking

Describes nameplate and ATEX plate details.

3.2 General Description

Explains the basic design of VU/VH series pumps.

3.3 Design and Functional Principle

Details the liquid ring principle and operation.

3.4 Shaft Sealing

Explains mechanical seals and packing glands.

Transport, Storage and Disposal

4.1 Transport

Covers unpacking, manual transport, and lifting gear usage.

4.2 Storage

Provides guidelines for storing pumps/aggregates properly.

4.3 Preservation

Details methods for preserving the pump during storage.

4.4 Removing Preserving Agent

Explains the process of removing preserving agents.

4.5 Disposal

Outlines procedures for environmentally sound disposal.

Set-up and Connection

5.1 Preparing Set-up

Covers ambient conditions, clearances, and installation site prep.

5.2 Installation Methods

Covers foundation, no foundation, and level surface mounting.

5.3 Motor Installation

Covers mounting the motor and aligning coupling halves.

5.4 Planning Pipe System

Guides on dimensioning pipes, supports, and connections.

Operation

6.1 Preparations for Commissioning

Covers identifying pump type, removing preserving agent, and filling.

6.2 Commissioning

Details the switch-on procedure and checks before starting.

6.3 Setting the Operating Liquid Flow Rate

Explains continuous-flow, open, and closed circulation cooling.

6.4 Decommissioning

Describes safe procedures for taking the pump out of operation.

6.5 Re-commissioning

Outlines steps for bringing a decommissioned pump back online.

6.6 Operating Stand-by Aggregate

Instructions for operating standby units.

Maintenance and Servicing

7.1 Monitoring

Covers inspection intervals and checks for proper operation.

7.2 Lubrication Intervals for Rolling Bearings

Specifies lubrication schedules for bearings.

7.3 Rinsing Off Contaminations

Details cleaning procedures for minor and major contamination.

7.4 Preventing Calcification

Explains how to prevent calcification and its effects.

7.5 Disassembly

Provides step-by-step instructions for disassembling the pump.

Troubleshooting

Technical Data

9.1 Operating Limit Values

Specifies pressure, temperature, density, viscosity limits.

9.2 General Specifications

Covers weight, sound level, drive power, operating liquid, media, connections.

9.3 Installation and Maintenance Data

Includes ambient conditions, clearances, torques, lubricants, preserving agents.

9.4 Pump Nozzle Forces and Adjustment

Details permissible forces/torques and impeller gap dimensions.

Appendix

10.1 Dimension Drawings

Provides detailed dimension drawings for VU/VH series pumps.

10.2 Cross-sectional Drawings

Shows cross-sectional views and parts lists for VU/VH pumps.

10.3 Conformity Documents

Includes Certificate of Conformity and EC Declaration of Conformity.

Speck pumpen VH Series Specifications

General IconGeneral
BrandSpeck pumpen
ModelVH Series
CategoryWater Pump
LanguageEnglish

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