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Speck pumpen VH 400 - 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

  • D
    David YoungAug 16, 2025
    What to do if my Speck pumpen Water Pump motor protection is triggered?
    • C
      christopherzimmermanAug 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.
  • P
    Pamela RoblesAug 19, 2025
    Why is my Speck pumpen VH 400 motor consuming excessive power?
    • K
      Kathleen ReynoldsAug 19, 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.
  • S
    smillerAug 23, 2025
    What to do if my Speck pumpen Water Pump is leaking?
    • O
      olsongeorgeAug 23, 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.
  • P
    Paula BentleyAug 27, 2025
    Why is my Speck pumpen VH 400 not producing vacuum?
    • D
      Daniel HowardAug 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.
  • D
    davisyolandaAug 31, 2025
    Why is my Speck pumpen VH 400 not running smoothly?
    • T
      Timothy WillisAug 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.
  • K
    kellywhitakerSep 7, 2025
    Why is my Speck pumpen VH 400 making a strange noise?
    • P
      Phillip HaneySep 7, 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
    Julie BerryNov 11, 2025
    Why is my Speck pumpen VH 400 Water Pump motor not starting?
    • C
      Craig HicksNov 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

Target Groups

Warnings and Symbols

Explains warning symbols, security levels, and consequences.

Safety

Intended Use

Specifies the correct and intended application of the pump/aggregate.

Possible Misuse

General Safety Instructions

Overarching safety guidelines for operation and maintenance.

Product Safety

Product safety guidelines and compliance.

Operator Responsibilities

Operator's duties for safe operation and compliance.

Safety Devices

Staff Obligations

Special Risks

Highlights specific risks for explosive areas or dangerous media.

Set-up and Connection

Preparing Set-up

Set-up with Foundation

Instructions for setting up the aggregate on a foundation.

Set-up Without Foundation

Motor Installation

Planning Pipe System

Guidelines for designing and planning the piping system.

Operation

Preparations for Commissioning

Steps to take before starting the pump for the first time.

Commissioning

The process of starting up the pump/aggregate.

Switch-off

Procedures for safely shutting down the pump.

Setting the Operating Liquid Flow Rate

Maintenance and Servicing

Monitoring

Disassembly

Detailed steps for disassembling the pump.

Disassembly of VU 20;40, VH 20;40;60

Specific disassembly steps for VU 20/40 and VH 20/40/60 models.

Disassembly of VU 80;140;220 VH 110;140;180

Specific disassembly steps for VU 80-220 and VH 110-180 models.

Disassembly of VU 300;450, VH 300;350;400

Specific disassembly steps for VU 300/450 and VH 300/350/400 models.

Disassembly of VU 351;451

Specific disassembly steps for VU 351/451 models.

Disassembly of VU 500;600;800;1200;1600

Specific disassembly steps for VU 500-1600 models.

Preparations for Assembly

Pre-assembly checks and general guidelines.

Assembly of VU 20;40, VH 20;40;60

Specific assembly steps for VU 20/40 and VH 20/40/60 models.

Assembly of VU 80;140;220, VH 110;140;180

Specific assembly steps for VU 80-220 and VH 110-140/180 models.

Assembly of VU 300;450, VH 300;350;400

Specific assembly steps for VU 300/450 and VH 300/350/400 models.

Assembly of VU 351;451

Specific assembly steps for VU 351/451 models.

Assembly of VU;VH 500;600;800;1200;1600

Specific assembly steps for VU/VH 500-1600 models.

Troubleshooting

Motor Does Not Start

Potential causes and solutions when the motor fails to start.

Pump is Blocked

Reasons for a blocked pump and how to fix it.

Motor Protection Triggered

Troubleshooting steps when motor protection activates.

Excessive Power Consumption of the Motor

Pump Does Not Produce Vacuum

Identifying causes for lack of vacuum generation.

Insufficient Vacuum

Troubleshooting reduced vacuum performance.

Leaking Pump

Pump Does Not Run Smooth

Technical Data

Operating Limit Values

Lists maximum and minimum operating parameters for various models.

General Technical Data

Drive Power

Operating Connections

Tightening Torques

Permissible Forces; Torques Acting on Pump Nozzles

Speck pumpen VH 400 Specifications

General IconGeneral
Fluid temperatureUp to 60°C
Frequency50 Hz
Flow rate400 l/min
Max Flow Rate400 l/min
Voltage230/400 V
Inlet/Outlet Diameter1 1/2" BSP / 1 1/2" BSP

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