Vogt MD Series User Manual

34
Useful Tips
8.1 Flow Rate is Insufficient
8.2 Discharge Pressure is Insufficient
8.- Defective pump sealing.
Possible Causes
Solutions
· Check and complete the filling of the system with
liquid.
· Check the delivery geometric height.
· Check pressure losses in the delivery pipe
(partially closed valve, foreign bodies, back
pressure too low).
2.- The discharge head is too high (higher than that
for which the pump was selected).
1.- The pump is not primed.
3.- The suction lift is too high (insufficient
NPSH).
· Check that NPSHavailable > NPSHrequired
· Check suction geometric head.
· Check the suction line for head losses (partially
closed valve, foreign bodies, back pressure too
low).
4.- The impeller ducts are partially
clogged.
· Che
ck and release
obstruction.
5.- Air enters the suction pipe.
· Check and repair damaged ducts and
defective joints.
6.- D
amaged internal mechanical pump adjustments.
· Consider a pump repair.
7.- The foot valve or pipe is not sufficiently
submerged.
· Check and submerge as necessary.
· Check and replace all pump sealing parts such as
O'rings, mechanical seals or gaskets.
2.- Damaged internal mechanical pump adjustments.
Possible Causes Solutions
1.- Air enters the suction pipe.
· Check and repair damaged ducts and
defective joints.
· Consider a pump repair.
3.- The viscosity of the liquid is higher than initially
expected.
· Check and consult the
manufacturer.
Useful Tips
for trouble-free operation

Vogt MD Series Specifications

General

Brand	Vogt
Model	MD Series
Category	Water Pump
Language	English