Operat ion and Maintenance Manual
QTS Series Twin Screw Positive Displacement Pump
36
Ampco Pumps Company QTS Manual M-030 Rev A 1.16
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ANNEX A
Cleaning guidelines for CIP (Clean in Place) systems with QTS Series
At the end of each production run, it is important to recover as much of the remaining product in
the pump as possible. The QTS design allows 100% draining in vertical and horizontal mounting
positions.
The QTS has the ability to pump low viscosity fluids at high speed for creating turbulent flow and
works well as a CIP supply pump.
Cleaning procedure for QTS pumps
The type of fluid being pumped and its characteristics affect the cleaning strategy, for example
cleaning methods suitable for dairy products may not be suitable for juice products, blood or
chocolate.
The cycle times, temperatures, cleaning mediums and concentrations of the detergents used will
all influence the effectiveness of the cleaning cycle. Care must be taken when defining these
processes to ensure that they are suitable for use with the particular product being pumped.
The best way to improve CIP efficiency is to implement structured guidelines and procedures. Cleaning
according to schedules and defined guidelines increases the control over cleaning parameters to
ensure fluid safety and quality. Use care when determining the right guidelines for each type of fluid.
Chemical compatibility between the cleaning detergents and the pump wet elements (construction
of SS 316L) should be verified. It is critical that the correct temperature clearance rotors are fitted
for the CIP cycle.
It is recommended that a differential pressure of 2 to 3 bar is created across the pump to promote
efficient cleaning; use valve(s) during the CIP cycle to promote pressure and flow variations that
may enhance the cleaning process.
If the QTS pump is used for CIP, there must be enough flow to ensure cleaning solution
velocity. If another pump is being used for CIP, a bypass should be installed around the QTS
pump to maintain line velocity throughout the system. The QTS should be run at a speed that
minimizes pressure drop.
Internationally accepted protocol for CIP suggests that during all phases of the CIP cycle, a pipeline
velocity between 1.5 m/sec and 3.0 m/sec is required. Velocities within this range have proven to
provide effective cleaning, although as a general rule the higher the velocity the greater the cleaning
The following table shows the recommended flow in GPM (LPM) for CIP:
Pipe diameter
1.5
2.0
2.5
3.0
4.0
6.0
Speed
1.5 m/s
24 (91)
42 (159)
68 (257)
99 (375)
177(670)
410 (1552)
3.0 m/s
48 (121)
84 (318)
136 (295)
198 (749)
354 (1340)
820 (3104)
