Viking K-825 Benutzerhandbuch

SECTION  TSM 845

ISSUE

F

PAGE  13 OF  14

Some of the following may help pinpoint the problem:

►  Lost its prime from air lead or low level in tank  
►  Suction lift too high 
►  Rotating in wrong direction  
►  Strainer clogged  
►  Bypass valve open, pressure relief valve set too low or 

pressure relief valve poppet stuck open  

►  Improper end clearance  
►  Pump worn out  
►  Any changes in liquid, system or operation that would 

influence pump or coupling performance, e g  new liquid, 

additional lines or process changes  

►  Temperature changes either in the liquid or the 

environment  

►  Magnetic coupling is decoupling  Change in application 

(temperature, pressure, viscosity,’ etc ) may require 

torque beyond coupling capabilities 

►  Supply tank empty  
►  Liquid vaporizing in the suction line  
►  Air leak or air pocket in the suction line 

►  Pump is being starved  (heavy liquid cannot get to pump 

fast enough)  Increase suction pipe size, reduce length 

or slow down pump  

►  Pump is cavitating (liquid vaporizing in suction line)  

Increase suction pipe size or reduce length  

►  Check alignment  
►  Magnetic coupling decoupled    Shut off and restart 

►  Starving or cavitating - increase suction pipe size or 

reduce length  

►  Strainer partially clogged  
►  Air leak somewhere in suction line 
►  Running  too  slow  Is motor  the  correct  speed  and 

wired up correctly  

►  Pressure relief valve set too low, tuck open or has 

damaged poppet / seat 

►  Bypass line around pump partially open 
►  Pump worn out or too many gaskets 

►  Liquid more viscous than unit sized to handle 
►  System pressure relief valve set too high 
►  Coupling misaligned 
►  Bushings frozen up or liquid set up in coupling 

Pump Model Number:

Serial Number:

Date Received:

Date Installed:

Distributor:

Contact Person:

Phone:

Fax:

E-mail:

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