Fristam Pumps FP Series, Инструкция по эксплуатации и техническому обслуживанию, Страница: 24 / 32

Fristam FP/FPX Series Pump
24
COOLING WATER IN
WATER PIPE CONNECTIONS
FOR DOUBLE SEALS
1/8" N.P.T.
THROTTLE THIS VALVE
TO 1-2 GAL/HR
VISIBLE WATER
FLOW
TO DRAIN
2-5 FEET
IL-0173
7/7/00
Figure 6
CIP P
ROCESS
FP/FPX series pumps are suitable for the CIP (Cleaning In Place) process. The following is a general
example of the CIP process:
• Preliminary flush with water
• Caustic flush (NaOH, ~1-2%)
• Intermediate flush with water
• Acid flush (HNO3, ~1%)
• Final flush with water
The pump’s differential pressure should be sufficient to achieve adequate flow rates for proper cleaning.
The result of the CIP process is dependent on many factors (temperature, time, chemical compositions/
concentrations, speed, differential pressure, e.g.). Therefore, it is recommended that the cleaning cycle
is validated prior to being put into service.
I
NSTALLATION OF
W
ATER
F
LUSh FOR
D
OUbLE
M
EChANICAL
S
EAL
Set up the water flush for the double
mechanical seal as shown (
Figure
6 ). Use only between 1-2 gallons
per hour of water at a maximum
pressure of 5 PSI
. Excessive flow of
water through the seal increases the
pressure inside the seal.
Note: maxi-
mum pressure inside the seal is 5 PSI.
Excessive flow/pressure through the seal
flush will cause excessive wear and shorten
seal life.
Pipe the exit side of the water flush with 2-5 feet
physical height of tubing. This ensures that some
water is always in the center seal and the seal never
runs dry.
It is possible to inject steam through the center seal
(within the pressure requirements). We do not recom-
mend using steam alone for the cooling/lubricating of
the seal.
It is desirable to have the flush water on the outlet side visible. This
allows an easy check to see that the flush water is on and also if
the seal is functioning properly. In a malfunctioning seal the flush
water will disappear, become discolored, or show an unusual in-
crease in flow. If these conditions exist, check the seal and replace
if necessary.
I
NSTALLATION OF
W
ATER
C
ASCADE
Note: Not all FP/FPX pumps require a water cascade on the seal. The
water cascade (if supplied) is piped through the hub of the pump
housing and into the stationary seal. Since there is no rear seal, the
flush water will exit through the rear of the seal area (
Figure 6a ).
Use about 1-2 gallons per hour of water at a maximum pressure
inside the seal of 5 psi.
1265000062
8/21/02
WATER IN
Figure 6a