Omega FPU500 User Manual

FPU500

OMEGAFLEX®Peristaltic Pump

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Unpacking Instructions

i

Remove the Packing List and verify that you have received all equipment,
including the following (quantities in parentheses):

Peristaltic Pump (1)

Mounting Screws * (2)

Operator’s Manual (1)

*Long Mounting Screws (2) Optional

If you have any questions about the shipment, please call the Customer Service
Department.

When you receive the shipment, inspect the container and equipment for signs of
damage. Note any evidence of rough handling in transit. Immediately report any
damage to the shipping agent.

The carrier will not honor damage claims unless all shipping
material is saved for inspection. After examining and removing
contents, save packing material and carton in the event
reshipment is necessary.

From the Technical Library of _________________________________________

NOTE

ii

TABLE OF

CONTENTS

Peristaltic Pump

Page

Unpacking Instructions ................................................................ i

Chapter 1 Introduction .......................................................... 1-1

1.1 Description ............................................................................... 1-1

1.2 Features .................................................................................... 1-1

Chapter 2 Parts of the Pump ................................................. 2-1

2.1 Overall View of the Pump ..................................................... 2-1

2.2 Left Side of the Pump ............................................................. 2-2

2.3 Right Side of the Pump .......................................................... 2-3

Chapter 3 Setting Up the Pump(s) .......................................... 3-1

3.1 Introduction ............................................................................. 3-1

3.2 Required Hardware ................................................................ 3-1

3.3 Attaching the Pump ............................................................... 3-2

3.3.1 Attaching a Single Pump Directly to the Motor ................. 3-2

3.3.2 Stacking Two Pumps onto One Motor ................................ 3-4

3.3.3 Attaching a Single Pump to an Adapter Plate .................... 3-6

3.3.4 Using Your Own Adapter Plate ........................................... 3-8

Chapter 4 Tubing Information ............................................... 4-1

4.1 Selecting Tubing ..................................................................... 4-1

4.2 Tubing Life ............................................................................... 4-1

Chapter 5 Operating the Pump ............................................. 5-1

5.1 Introduction ............................................................................. 5-1

5.2 Loading the Tubing ................................................................ 5-2

5.3 Operating the Pump ............................................................... 5-4

5.4 Adjusting the Clamp Screw .................................................. 5-5

Chapter 6 Maintenance ......................................................... 6-1

6.1 Introduction ............................................................................. 6-1

6.2 Replacing the Rotor Assembly .............................................. 6-2

Chapter 7 Troubleshooting Guide .......................................... 7-1

Chapter 8 Technical Details ................................................... 8-1

8.1 Theory of Operation ............................................................... 8-1

8.2 Design Considerations ........................................................... 8-1

8.3 Design Solution ....................................................................... 8-1

8.4 Stacking More than Two Pumps .......................................... 8-2

Chapter 9 Specifications ........................................................ 9-1

Chapter 10 Spare Parts and Accessories .............................. 10-1

Index .......................................................................................... I

I

Index

I

A

Adapter Plate ........................................................... 3-6

Adapter Plate Specifications .................................. 3-8

C

Clamp Screw Adjustment ...................................... 5-5

Creeping of Tubing ................................................. 5-5

F

Flow Rates ................................................................ 1-1

M

Mounting Screw Types .......................................... 3-1

P

Pump

Attaching ...

One pump to the Motor ......................... 3-2

One pump to an Adapter Plate ............. 3-6

(Stacking) More than Two Pumps ........ 8-2

Two Pumps to the Motor ....................... 3-4

Left Side View ..................................................2-2

Maintaining...................................................... 6-1

Operating ......................................................... 3-1

Overall View ................................................... 2-1

Right Side View .............................................. 2-3

R

Rotor Assembly - Replacing .................................. 6-2

S

Screw Types ............................................................. 3-1

Stacking Two Pumps .............................................. 3-4

T

Tubing, Creeping of ................................................ 5-5

Tubing, Life of .................................................. 4-1, 9-4

Tubing, Loading ...................................................... 5-2

Tubing Materials ..................................................... 4-1

Index

II

Notes

I

1

Introduction

1-1

1.1 Description

The peristaltic pump offers exceptional simplicity, ease-of­use, and variable flow capacity. The pump is self-priming
and non-siphoning. It prevents back flow since one of the
three rollers is always compressing the tubing. As one section
of a tube fatigues, simply move the tube along to an unused
section and continue pumping. To facilitate changing the
tubing, a latch mechanism allows for easy opening and
closing of the pump.

No tools are required to load the tube. Pumps are mounted to
a pump motor via two screws and can be double stacked.
Tubing can even be changed on stacked pumps without
detaching either of the pumps from the motor. Once tubing is
loaded, a clamp plate holds it securely in place during pump
operation. A single pump can handle a broad range of flow
rates and tube materials.

1.2 Features

⻬ Stainless steel rotor assembly

⻬ Ideal for use in sterile, corrosive, or general laboratory

operating environments.

⻬ Flow rates from 0.5 to 2280 mL/minute (36 gallons/hour)

⻬ Quick mounting to pump motor

⻬ Easily stackable mounting for multi-channel pumping

⻬ Three-roller geometry reduces pulsation and improves

priming

⻬ Polysulfone housing for durability and chemical

resistance

Introduction

1

1-2

Notes

2

Parts of the Pump

2-1

2.1 Overall View of the Pump

Figure 2-1. Overall View

Item Description Function

1 Stator Fixed surface for tubing compression

2 Latch Used to open and close the Stator

3 Clamp Plate Secures the tubing during pump operation

4 Clamp Screw Adjusts the tubing clamp position

5 Rotor Shaft Main drive shaft for the pump

6 Mounting Holes Allow clearance for Mounting Screws

7 Lower Shield Shields the tubing, supports the Rotor Assembly

8 Base Mounting surface to attach the pump to the

motor, supports the Rotor Assembly

9 Mounting Screws Attach the pump to the motor (screws not shown)

10 Tubing Conduit for fluid

1

4

7

5

6

8

2

3

10

Parts of the Pump

2

2-2

2.2 Left Side of the Pump

Figure 2-2. View of the Left Side

Item Description Function

1 Stator Fixed surface for tubing compression

2 Latch Used to open and close the stator

4 Clamp Screw Adjusts the tubing clamp position

5 Rotor Shaft Main drive shaft for the pump

7 Lower Shield Shields the tubing, supports the Rotor Assembly

8 Base Mounting surface to attach the pump to the motor,

supports the Rotor Assembly

82

1

7

5

4

Parts of the Pump

2

2-3

2.3 Right Side of the Pump

Figure 2-3. View of the Right Side

Item Description Function

3 Clamp Plate Secures the tubing during pump operation

4 Clamp Screw Adjusts the tubing clamp position

5 Rotor Shaft Main drive shaft for the pump

7 Lower Shield Shields the tubing, supports the Rotor Assembly

8 Base Mounting surface to attach the pump to the motor,

supports the Rotor Assembly

8

3

57

4

Parts of the Pump

2

2-4

Notes

3

Setting Up the Pump(s)

3-1

3.1 Introduction

To attach a single pump directly to a pump motor, follow the
procedure in Section 3.3.1.

To stack two pumps to a motor, follow the procedure in
Section 3.3.2.

To attach the pump to an adapter plate (for your own motor),
follow the procedure in Section 3.3.3.

To use your own adapter plate, follow the procedure in
Section 3.3.4.

Before you mount the pump to any pump motor, make
sure that power to the motor is turned off.

3.2 Required Hardware

Number of Pumps Mounting Screw Mounting Screw Number of Adapter Plate*

Stacked Type Part Number Mounting Screws Assembly Number

1 Standard FPU500-SMS** 2 FPU500-AP

2 Long FPU500-LMS

†

2 FPU500-AP

* Optional adapter plate assembly includes mounting screws and pins

** Supplied standard with pump; can only be used to mount a single

pump

†

Must be specified at the time of ordering the pump; can only be used
for mounting 2 stacked pumps

NOTE

Setting Up the Pump(s)

3

3-2

3.3 Attaching the Pump

3.3.1 Attaching a Single Pump Directly to the Motor

Refer to Figures 3-1 through 3-4 and Figure A.

Figure 3-1. Pump in Closed Position Figure 3-2. Aligning the Rotor Shaft

Figure 3-3. Aligning the Pins and Holes Figure 3-4. Securing the Pump to

the Motor

FACE OF
MOTOR

STANDARD
MOUNTING
SCREWS

FACE OF
MOTOR

TOP ALIGNMENT
PIN

BOTTOM
ALIGNMENT PIN

ROTOR SHAFT

FLAT HEAD
SCREWDRIVER

MOUNTING
HOLES

MOTOR
SHAFT

Setting Up the Pump(s)

3

3-3

1. Refer to Figure 3-1. Make sure the pump is in the closed position.

2. Refer to Figure 3-2 and Figure A. Place the blade of a flathead
screwdriver in the groove of the Rotor Shaft (5). Rotate the Rotor
Shaft until its back tab slips into the groove of the motor shaft. Do
not try to force the pump onto the motor until you perform Step
#3.

3. Refer to Figure 3-3 and Figure A. Swivel the pump back and forth
slightly to align the holes on the back of the base (8) with the
alignment pins on the face of the motor. Press the pump base up
against the face of the motor.

4. Refer to Figure 3-4. With the pump and motor aligned, insert the
mounting screws through the mounting holes in the pump, until
they make contact with the threaded mounting holes in the face of
the motor.

5. Tighten the screws fully with a

9

⁄64 (M3.5) allen wrench.

Parts of the Pump

Figure A

5

8

(Base)

(Rotor Shaft)

Setting Up the Pump(s)

3

3-4

3.3.2 Stacking Two Pumps onto One Motor

Refer to Figures 3-5 through 3-7 and Figure B.

Figure 3-5. Placing the Second Pump Figure 3-6. Aligning the Rotor Shaft

on Top of the First Pump of the Second Pump

Figure 3-7. Securing Both Pumps to the Motor

LONG
MOUNTING
SCREWS

FACE OF
MOTOR

FLAT HEAD
SCREWDRIVER

FIRST PUMP

SECOND
PUMP

FACE OF
MOTOR

FIRST
PUMP

SECOND
PUMP

Setting Up the Pump(s)

3

3-5

1. Refer to Figures 3-1 through 3-3. Perform Steps 1, 2 and 3 in
Section 3.3.1 to put the first pump on the face of the motor.

2. Refer to Figure 3-5 and Figure B. Make sure the second pump is
in the closed position.

3. Refer to Figure 3-6 and Figure B. Place the blade of the flathead
screwdriver in the groove of the Rotor Shaft (5) of the second
pump. Rotate the Rotor Shaft of the second pump until it’s back
tab slips into the groove of the Rotor Shaft of the first pump.

4. Refer to Figure 3-7. With the pumps and motor aligned, insert the
optional LONG mounting screws through the mounting holes in
both pumps, until they make contact with the threaded mounting
holes in the motor.

5. Tighten the long screws fully with a small flathead screwdriver.

For technical details on stacking more than 2 pumps, refer to
Chapter 8.

Parts of the Pump

Figure B

5

8

(Base)

(Rotor Shaft)

Setting Up the Pump(s)

3

3-6

3.3.3 Attaching a Single Pump to an Adapter Plate

Refer to Figures 3-8 through 3-11 and Figure C.

Figure 3-8. Mounting the Adapter Plate Figure 3-9. Pump in Closed Position

Figure 3-10. Aligning the Pump Figure 3-11. Securing the Pump to

with the Plate the Plate

STANDARD
MOUNTING
SCREWS

FACE OF
MOTOR

TOP ALIGNMENT
PIN

BOTTOM
ALIGNMENT PIN

ROTOR SHAFT

FLAT HEAD
SCREWDRIVER

ADAPTER
PLATE

MOUNTING
HOLES

VENDOR

MOTOR

MOTOR SHAFT

ALIGNMENT PINS

MOUNTING
HOLES

THREADED
HOLES
TO MOUNT
ADAPTER
PLATE TO
VENDOR
MOTOR (4X)

ALIGNMENT
PINS FOR
PUMP (2X)

CLEARANCE HOLES
FOR VENDOR MOTOR
ALIGNMENT PINS (2X)

ADAPTER PLATE

Setting Up the Pump(s)

3

3-7

The adapter plate is designed to have the same alignment pins and
mounting holes as the front face of the standard pump motor. It acts as
an interface between a non-standard pump motor and the peristaltic
pump. The non-standard pump motor must have a motor shaft groove
large enough to accept the the pump rotor shaft. It must also have at
least two 8-32 mounting holes aligned with those on the adapter plate
(refer to Figure 3-12).

Mounting the adapter plate to the motor (refer to Figure 3-8)

1. Align the plate so that the clearance holes fit over the alignment pins (on
some units) of the non-standard motor.

2. Using the four 8-32 screws provided, attach the adapter plate to the motor.

Mounting the pump to the adapter plate

3. Make sure the pump is in the closed position. Refer to Figure 3-9.

4. Refer to Figure 3-10 and Figure C. Place the blade of a flathead
screwdriver in the groove of the Rotor Shaft (5). Rotate the Rotor Shaft until
its back tab slips into the groove of the motor shaft. Do not try to force the
pump onto the motor until you perform Step #5.

5. Refer to Figure 3-11 and Figure C. Swivel the pump back and forth slightly
to align the holes on the back of the base (8) with the pins on the adapter
plate. Press the pump base up against the face of the motor.

6. Refer to Figure 3-11. With the pump and motor aligned, insert the
mounting screws through the mounting holes in the pump, until they make
contact with the threaded mounting holes in the adapter plate.

7. Tighten the screws fully with a

9

⁄64 (M3.5) allen wrench.

Parts of the Pump

Figure C

5

8

(Base)

(Rotor Shaft)

Setting Up the Pump(s)

3

3-8

3.3.4 Using Your Own Adapter Plate

Figure 3-12 shows the dimensions of the front of the pump
and the rear of the pump. These diagrams enable you to
locate and drill out the proper size holes so you can mount
the pump to a motor using your own adapter plate.

Figure 3-12. Dimensions of the Pump

Note: The rotor shaft extends out

0.563 beyond the back surface
of the pump.

Setting Up the Pump(s)

3

3-9

Notes

4

Tubing Information

4-1

4.1 Selecting Tubing

Select a tubing material and size that is right for your
application (the fluid and flow rate that you are pumping).

Table 9-2 in Chapter 9, shows the average flow rates for
different size tubing. Normalized flow rates (mL per
revolution) vary significantly, based on motor speed, tubing
materials, viscosity, and mechanical tolerances in pump
dimensions. Table 9-3 outlines the variances resulting from
differences in motor speed, tubing materials, and mechanical
tolerances. Table 9-5 outlines the variances due to the
difference in viscosity.

To determine the chemical compatibility of a particular
tubing material, it is recommended that you test the tubing
under actual conditions.

Tubing materials that can be used include Vinyl, Viton,
Tygon, Silicone, Santoprene, and Norprene. Up to 68
durometer tubing can be used.

Poor tubing life results were obtained for 5⁄16" (8.0mm)
inner diameter Santoprene tubing. This particular tubing
should not be used with the pump.

4.2 Tubing Life

Over time and high speeds, flow rates will drop as the tubing
wears out. Tubing life for various materials and sizes are
shown in Table 9-4 in Chapter 9. Tubing should be
periodically inspected for wear. Either move the tubing to a
fresh section, or replace tubing entirely (refer to Chapter 5).

NOTE

Tubing Information

4

4-2

Notes

5

Operating the Pump

5-1

5.1 Introduction

This chapter discusses the following topics:

• Loading the tubing (Section 5.2)

• Operating the Pump (Section 5.3) and

• Adjusting the Clamp Screw (Section 5.4).

Read each section thoroughly to guarantee successful pump
operation.

Operating the Pump

5

5-2

5.2 Loading the Tubing

Before you load the tubing in the pump, make sure that
power to the motor is turned off and that the rotor has
come to a complete stop. The rotor is partially exposed
when the pump is in the open position.

Follow this procedure (refer to Figures 5-1 through 5-4 and
Figure D):

Figure 5-1. Opening the Stator Figure 5-2. Loading the Tubing

Figure 5-3. Closing the Stator Figure 5-4. Adjusting the Clamp Screw

NOTE

Operating the Pump

5

5-3

1. Refer to Figure 5-1 and Figure D. Snap open the Stator (1) by
pushing the spring-loaded area of the Latch (2). Remove any old
tubing from the pump, if necessary.

2. Refer to Figure 5-2 and Figure D. Loop the Tubing (10) over the
rollers. This is easy to do even for stacked pumps.

Tubing can be changed on stacked pumps without
detaching either of the pumps from the motor.

3. Refer to Figure 5-3. Push the stator closed until you hear the latch
engage.

4. Refer to Figure 5-4. Tighten the Clamp Screw (4) until the Clamp
Plate (3) contacts the tubing, securing it in place.

Parts of the Pump

Figure D

1

4

2

(Clamp Screw)

(Stator)

(Latch)

10

(Tubing)

3

(Clamp Plate)

NOTE

Operating the Pump

5

5-4

5.3 Operating the Pump

With the pump set up, adjust all control settings for the pump
motor and start pumping. Figure 5-5 shows fluid flow
directions with respect to motor directions.

Extensive testing has shown that the minimum motor speed
required to prime the tubing varies significantly with the size
of the tubing. These variances are shown in Table 9-1 in
Chapter 9. If the tubing will not prime regardless of motor
speed, simply press on the stator (refer to Figure 5-3) while
the stator is shut and the motor is running. Pressing on the
stator enhances the priming action of the pump. Release the
pressure after the tubing is primed.

Make sure that the stator is fully latched before motor
power is turned on. If the motor is turning, and the stator is
unlatched for any reason, make sure to keep fingers and
clothing away from the moving rotor assembly until the
motor is turned off and the rotor assembly comes to a
complete stop.

Figure 5-5a. Inlet and Outlet Flow

INLET

OUTLET

MOTOR TURNING COUNTER-CLOCKWISE

NOTE

Operating the Pump

5

5-5

Figure 5-5b. Inlet and Outlet Flow

5.4 Adjusting the Clamp Screw

Once you start the pump, you may need to adjust the Clamp
Screw (4) slightly, to prevent the tube from creeping (moving)
through the pump. Creeping tends to occur on tubing of
larger sizes and tubing made from low friction materials (for
example, Santoprene). Use the following procedure to
eliminate creeping. Refer to Figure 5-6.

Figure 5-6. Adjusting the Clamp Screw

4

(Clamp Screw)

INLET

OUTLET

MOTOR TURNING CLOCKWISE

1. Turn the pump motor off.

2. Rotate the clamp screw a quarter turn clockwise, in order
to increase the pressure of the clamp plate on the tube.

3. Turn the motor power back on and observe the tubing. If the
tubing has not stopped creeping, go back to Step 1. Otherwise,
continue pumping.

Operating the Pump

5

5-6

Operating the Pump

5

5-7

Notes

6

Maintenance

6-1

6.1 Introduction

• No lubrication is required for the pump. All bearings
are pre-sealed and rated for long life.

• After many hours of use, fine particles of tubing will
tend to accumulate inside the pump and on the rollers.
Use a high pressure air hose (60 PSI) to blow out most of
the particles from the pump. Clean all parts with a mild
soap solution or a light mineral oil.

• The pump may be dismantled either for cleaning or for
replacing the rotor assembly in case of a malfunction.
Follow the procedure in Section 6.2 to replace the rotor
assembly.

Maintenance

6

6-2

6.2 Replacing the Rotor Assembly
(Part Number FPU500-RA)

In the replacement kit you will find one Rotor Assembly (13)
and two Washers (12).

Figure 6-1 shows the exploded view of the pump.

Figure 6-1. Exploded View of the Pump

Maintenance

6

6-3

1. Using a phillips head screwdriver, remove the two #6 Self­Tapping Screws (14) on the back of the base that hold the pump
together.

2. Pull apart the three major plastic assemblies in the pump –
the Lower Shield (7), Base (8), and Stator (1) Assemblies.
A

3

⁄16" x 13⁄4" long Alignment Pin (11) aligns the three assemblies
and can be left sitting in the base. The Rotor Assembly (13)
rotates within ball bearings pressed into the Base and Lower
Shield. Two Washers (12) prevent the Rotor Assembly from hitting
the bearings.

3. Replace the Rotor Assembly and Washers with new ones.

4. Reassemble all parts.

a. Slip one washer onto the bottom of the Rotor Shaft. Slip the

bottom of the Rotor Shaft through the bearing pressed into

the Base.
b. Add the second washer onto the top of the Rotor Shaft.
c. Place the Alignment Pin (11) in the mounting hole in the

Base.
d. Slip the Boss (15) in the Stator Assembly over the alignment

pin, until the bottom of the Boss makes contact with the base.
e. Bring the Lower Shield Assembly down, so that the following

four assembly actions occur:

i. The top of the Rotor Shaft fits through the bearing

pressed into the Lower Shield.
ii. The Boss in the Lower Shield fits over the alignment pin.
iii. The slot in the Lower Shield fits over the Clamp Plate.
iv. The bottom of the Lower Shield is flush with the Base.

f. Attach the Base to the Lower Shield with the two #6 Self-

Tapping Screws.

Maintenance

6

6-4

Notes

7

Troubleshooting Guide

7-1

Problem Solution

No flow out of the outlet tubing 1. Check to see that the Stator is

snapped shut. If it is, push down on
the Stator while the motor is
running. This action enhances the
self-priming capability of the pump.

2. Make sure the tubing is loaded
properly. The tubing should be
centered in the middle of the
rollers. Reload if necessary.

3. Check to see that the tubing has no

holes or cracks. Replace with new
tubing, if necessary.

4. Check that the inlet tubing is fully

immersed in fluid.

5. Check that the motor is rotating in

the correct direction. Refer to Figure
5-5.

6. Check to see if the tubing is

clogged. Replace with new tubing,
if necessary.

7. Check to see if the pump is properly

mounted to the motor. Refer to
Section 3 for instructions on proper
mounting.

8. Check to see if the Rotor Assembly

is worn or stuck. Check that the
rollers spin freely. Use a high
pressure air hose to blow out
particles from the pump which may
be restricting roller motion.

墌

Troubleshooting Guide

7

7-2

Problem Solution

Fluid flows in the opposite 1. Check tubing connections to source
direction of what is intended and drain containers.

2. Check that the motor is rotating in

the correct direction. Refer to
Figure 5-5.

Fluid flow direction cannot The motor only turns in one
be reversed direction. Make sure you use a

bi-directional motor.

The tube moves when pumping Adjust the Clamp Screw. Refer to

Section 5.4.

The Stator will not snap shut 1. Make sure the tubing is loaded

properly. The tubing should be
centered in the middle of the rollers.

2. Make sure the tubing wall thickness

is correct (refer to Table 9-1).

3. The tubing inside diameter may be

too large for the pump. (refer to
Table 9-1).

4. The tubing durometer may be too

high for the pump (refer to Chapter

9).

5. The tubing may be caught on the

bottom roller. Reposition the roller
slightly and load the tubing again.

Screws are too short to fasten Use long mounting screws
two stacked pumps to the motor (Part Number FPU500-LMS)

Troubleshooting Guide

7

7-3

Problem Solution

Motor will not turn 1. Make sure the tubing is loaded

properly. The tubing should be
centered in the middle of the rollers.
Reload if necessary.

2. Check to see if the motor is turned

on.

3. Check motor fuse.

Motor will not turn – 1. Make sure the tubing is loaded
overcurrent condition properly. The tubing should be

centered in the middle of the rollers.

2. Make sure the tubing wall thickness

is correct (refer to Table 9-1).

3. The tubing durometer may be too

high for the pump (refer to Chapter

9).

4. The tubing may be caught on the

bottom roller. Reposition the roller
slightly and load the tubing again.

The pump will not stay on the 1. The pump is not properly mounted
motor to the motor. Refer to Section 3.

2. The mounting screws are loose.

Tighten the screws, if necessary.

Troubleshooting Guide

7

7-4

Notes

8

Technical Details

8-1

8.1 Theory of Operation

A peristaltic pump is a fluid pump which operates to create a
moving region of compression along a flexible tube. The
motion of the compressed region of the tube along its axis
forces fluid ahead and creates a partial vacuum behind the
region. This partial vacuum forces more fluid forward. The
pump has a Rotor Assembly which rotates an attached set of
rollers up against a tube backed by a fixed circular wall called
the Stator. The rotary motion of the Rotor Assembly around
the center axis of the pump forms the region of moving
compression in the tube.

8.2 Design Considerations

One side effect of the friction between the Rollers and the
tube is a net force on the tube in its axial direction. When
unchecked, this force tends to cause the tube to “creep” or
move forward. A pump must have some type of mechanism
to counter this force. In addition, is must give customers the
ability to change the tubing quickly, to use the same pump
with a wide variety of tube diameters and materials, and to
stack more than one pump onto a motor.

8.3 Design Solution

The peristaltic pump provides a novel solution to today’s
customer needs. In this design a Rotor Assembly consists of
two stainless steel rotors which sandwich three rollers
between ball bearings. The Rotor Assembly is rotated by a
Rotor Shaft, driven by a pump motor. The Rotor Assembly is
supported by a pump base. A stator is mounted to the Base
and acts as a tubing compression surface for peristaltic
pumping of fluid when in the closed position. In addition, the
tight fit of the mating areas of the Stator and the Lower Shield
(also mounted to the Base) acts to fully enclose the pump
region. This enclosure prevents splashing of fluid in the event
that the tubing fails and fluid leaks.

Technical Details

8

8-2

Because of the back tab and groove found in the Rotor Shaft
design, pumps can be stacked one of top of another and
attached to a common pump motor. Only one motor needs to
be purchased to pump fluid between several different
containers.

The Latch Assembly of the pump allows the Stator to be
easily opened and closed, allowing for quick tubing changes.
Push a spring-loaded area on the Latch to open the Stator.
Push the Stator shut and it snaps into place. The pump
dimensions are set to allow pumping of tubing with a broad
range of sizes. A Clamp Screw actuates a Clamp Plate. This
plate pushes the tubing against two walls in the Lower
Shield, acting to prevent the tubing from creeping. The
Clamp Screw and Clamp Plate are designed with sufficient
travel to prevent “creeping” in a broad range of tube sizes.

8.4 Stacking More than Two Pumps

Optional mounting screws are available to stack two pumps.
However, the number of pumps that can be stacked is limited
only by the motor power available. In general, up to

1

⁄20 horsepower (38 watts) of motor power is required to

operate each pump up to 600 RPM.

9

Specifications

9-1

Table 9-1. Tubing Size vs Min. Motor Speed Required for Priming *

Tubing Size - ID Minimum Motor Speed (RPM)

1

⁄32" 300

1

⁄16" 250

1

⁄8" 100

3

⁄16"50

1

⁄4"50

5

⁄16"50

1mm 300

2mm 250

3mm 100

4mm 50

5mm 50

6mm 50

7mm 50

8mm 50

(* Tests are done using 20°C water, 0 PSI back pressure)

Maximum Fluid Back Pressure: 20 PSI

Tube Wall Thickness Required:

1

⁄16" (1.5 mm)

Tube Inner Diameter Range:

1

⁄32" to 5⁄16"

(1 mm to 8 mm)

Tubing Materials: Vinyl, Viton, Tygon,

Silicone, Santoprene,
and Norprene

Tubing Durometer: 68 or less

Fluid Temperature Range: -50°F to 300°F

(-46°C to 149°C)

Specifications

9

9-2

Pump Dimensions (H x W x D): 4" x 4" x 21⁄4"

(102 x 102 x 57 mm)
Pump Weight: 0.9 lb (0.4 kg)
Adapter Plate Dimensions (H x W x D): 3" x 2

1

⁄2" x 1⁄8"

(76 x 64 x 3.2 mm)
Adapter Plate Weight: 0.2 lb (0.1 kg)
Speed Range: 10 to 600 RPM

(adjustable via motor

settings)
Flow Direction: Bi-directional
Motor Power Required for Two Pumps

to Operate at 600 RPM:

1

⁄10 HP (75 Watts)

Pump Housing: Polysulfone material,

all plastic parts

Rotor Assembly: Stainless steel rotor

and rollers

Max. Suction Lift: 20 feet of H

2

O

(6.1 meters of H2O)

Flow rate tests were done with 20°C water at 0 PSI back pressure.

Table 9-2. Average Flow Rates

Tubing Wall Tubing Size mL per Minimum Flow Maximum Flow

Thickness Inner Diameter Revolution Rate at 600 RPM Rate at 600 RPM

(mL/Minute) (mL/Minute)

1

⁄16"

1

⁄32" 0.05 1 30

1

⁄16"

1

⁄16" 0.22 3 132

1

⁄16"

1

⁄8" 0.9 9 540

1

⁄16"

3

⁄16" 1.9 19 1140

1

⁄16"

1

⁄4" 3.0 30 1800

1

⁄16"

5

⁄16" 3.8 38 2280

1.5 mm 1.0 mm 0.08* 1 48

1.5 mm 2.0 mm 0.35* 4 210

Specifications

9

9-3

Table 9-2. Average Flow Rates (Cont’d)

Tubing Wall Tubing Size mL per Minimum Flow Maximum Flow

Thickness Inner Diameter Revolution Rate at 600 RPM Rate at 600 RPM

(mL/Minute) (mL/Minute)

1.5 mm 3.0 mm 0.8* 8 482

1.5 mm 4.0 mm 1.43* 15 857

1.5 mm 5.0 mm 2.1* 21 1257

1.5 mm 6.0 mm 2.7* 27 1607

1.5 mm 7.0 mm 3.6* 37 2187

1.5 mm 8.0 mm 3.9* 39 2316

* Metric mL per Revolution numbers are rounded off

Normalized flow rates (mL per revolution) vary significantly, based on
motor speed, tubing materials, and mechanical tolerances in pump
dimensions. In addition, the variances are different for the different
tubing dimensions. Variances from the normalized flow rates of Table
9-2 are shown below. The data is shown for new tubing only.

Tubing operating life tests are done at 600 RPM, with 20°C water, 0 PSI
back pressure until the tubing breaks

Table 9-3. Variances in Normalized Flow Rate (mL per Revolution)

Tubing Size Due to Between Pumps Due to Different

Inner Diameter Motor (due to Mechanical Tubing Materials

(in.) Speed Tolerances)

1

⁄32 ±10% ±25% ±20%

1

⁄16 ±10% ±15% ±15%

1

⁄8 ±10% ±10% ±5%

3

⁄16 ±5% ±10% ±5%

1

⁄4 ±5% ±15% ±5%

5

⁄16 ±15% ±20% ±10%

Specifications

9

9-4

Tubing operating life test were done at 600 RPM, with 20°C water,
0 PSI, back pressure until the tubing breaks. Average tubing life
hours are shown. However, tubing life varies considerably
depending on tubing formulation, tubing back pressure, and fluid
pumped. Tubing should be inspected periodically for wear.

Table 9-4. Average Tubing Life

Tubing Wall Tubing Wall Tubing Tubing Average

Thickness Thickness Inner Diameter Inner Diameter Material Tubing Life

(in.) (mm) (in.) (mm) (Hours)

1

⁄16 1. 5

1

⁄16 1.5 Viton 10

1

⁄16 1. 5

1

⁄8 3.0 Viton 25

1

⁄16 1. 5

3

⁄16 4.5 Viton 25

1

⁄16 1. 5

1

⁄4 6.0 Viton 25

1

⁄16 1. 5

5

⁄16 8.0 Viton 10

1

⁄16 1. 5

1

⁄16 1.5 Tygon 60

1

⁄16 1. 5

1

⁄8 3.0 Tygon 60

1

⁄16 1. 5

3

⁄16 4.5 Tygon 30

1

⁄16 1. 5

1

⁄4 6.0 Tygon 30

1

⁄16 1. 5

5

⁄16 8.0 Tygon 30

1

⁄16 1. 5

1

⁄16 1.5 Silicone 60

1

⁄16 1. 5

1

⁄8 3.0 Silicone 60

1

⁄16 1. 5

3

⁄16 4.5 Silicone 60

1

⁄16 1. 5

1

⁄4 6.0 Silicone 50

1

⁄16 1. 5

5

⁄16 8.0 Silicone 40

1

⁄16 1. 5

1

⁄16 1.5 Santoprene 10 0

1

⁄16 1. 5

1

⁄8 3.0 Santoprene 100

1

⁄16 1. 5

3

⁄16 4.5 Santoprene 100

1

⁄16 1. 5

1

⁄4 6.0 Santoprene 75

NOTE: Poor tubing life results were obtained for

5

⁄16" (8.0mm) inner
diameter Santoprene tubing. This particular tubing should not be
used with the FPU-500 Pump.

Specifications

9

9-5

Table 9-4. Average Tubing Life (Cont'd)

1

⁄16 1.5

1

⁄16 1.5 Vinyl 60

1

⁄16 1.5

1

⁄8 3.0 Vinyl 60

1

⁄16 1.5

3

⁄16 4.5 Vinyl 60

1

⁄16 1.5

1

⁄4 6.0 Vinyl 40

1

⁄16 1.5

5

⁄16 8.0 Vinyl 30

1

⁄16 1.5

1

⁄16 1.5 Norprene 500

1

⁄16 1.5

1

⁄8 3.0 Norprene 500

1

⁄16 1.5

3

⁄16 4.5 Norprene 500

1

⁄16 1.5

1

⁄4 6.0 Norprene 400

1

⁄16 1.5

5

⁄16 8.0 Norprene 400

Table 9-6. Average Flow Rates for Viscous Liquids

Tubing Size

Liquid Tubing Wall Inner mL per Viscosity

Thickness Diameter Revolution

Mineral Oil

1

⁄16"

1

⁄32" 0 400 cps

Mineral Oil

1

⁄16"

1

⁄16" 0.005 400 cps

Mineral Oil

1

⁄16"

1

⁄8" 0.04 400 cps

Mineral Oil

1

⁄16"

3

⁄16" 0.15 400 cps

Mineral Oil

1

⁄16"

1

⁄4" 0.20 400 cps

Mineral Oil

1

⁄16"

5

⁄16" 0.25 400 cps

Molasses

1

⁄16"

1

⁄32" 0 8,000 cps

Molasses

1

⁄16"

1

⁄16" 0.002 8,000 cps

Molasses

1

⁄16"

1

⁄8" 0.01 8,000 cps

Molasses

1

⁄16"

3

⁄16" 0.07 8,000 cps

Molasses

1

⁄16"

1

⁄4" 0.08 8,000 cps

Molasses

1

⁄16"

5

⁄16" 0.10 8,000 cps

Flow rate tests were done with 20°C liquids at 0 psi back pressure

Specifications

9

9-6

Notes

10

Spare Parts and Accessories

10-1

Table 10-1. Spare Parts

Part Number Description

FPU500-SMS Standard Length Mounting Screws

FPU500-LMS Long Mounting Screws

FPU500-AP Adapter Plate Assembly

FPU500-RA Rotor Assembly (including washers)

Table 10-2. Accessories

Part Number * Tubing Type Size Durometer

(OD x ID) (Shore Hardness)

RECOMMENDED TUBING TYPES AND SIZES

TYVY Series Vinyl

3

⁄16 x 1⁄16 68

TYVY Series Vinyl

1

⁄4 x 1⁄8 68

TYVY Series Vinyl

5

⁄32 x 1⁄32 68

TYVY Series Vinyl

5

⁄16 x 3⁄16 68

TYVY Series Vinyl

3

⁄8 x 1⁄4 68

TYVY Series Vinyl

7

⁄16 x 5⁄16 68

TYSP Series Santoprene

3

⁄16 x 1⁄16 55 & 64

TYSP Series Santoprene

1

⁄4 x 1⁄8 55 & 64

TYSP Series Santoprene

5

⁄16 x 3⁄16 55 & 64

TYSP Series Santoprene

3

⁄8 x 1⁄4 55 & 64

* Contact the Sales Department for the specific part numbers of the
tubing you wish to purchase.

Spare Parts and Accessories

10

10-2

Table 10-2. Accessories (cont’d)

Part Number * Tubing Type Size Durometer

(OD x ID) (Shore Hardness)

RECOMMENDED TUBING TYPES AND SIZES

TYTY Series Tygon

1

⁄4 x 1⁄8 55

TYTY Series Tygon

5

⁄16 x 3⁄16 55

TYTY Series Tygon

3

⁄8 x 1⁄4 55

TYTY Series Tygon

7

⁄16 x 5⁄16 55

TYSC Series Silicone

1

⁄4 x 1⁄8 50 & 60

TYSC Series Silicone

5

⁄16 x 3⁄16 50 & 60

TYSC Series Silicone

3

⁄8 x 1⁄4 50 & 60

TYSC Series Silicone

7

⁄16 x 5⁄16 50 & 60

TYNP Series Norprene

3

⁄16 x 1⁄16 50

TYNP Series Norprene

1

⁄4 x 1⁄8 50

TYNP Series Norprene

5

⁄16 x 3⁄16 50

TYNP Series Norprene

3

⁄8 x 1⁄4 50

TYNP Series Norprene

7

⁄16 x 5⁄16 50

TYVT Series Viton

3

⁄16 x 1⁄16 60

TYVT Series Viton

1

⁄4 x 1⁄8 60

TYVT Series Viton

5

⁄32 x 1⁄32 60

TYVT Series Viton

5

⁄16 x 3⁄16 60

TYVT Series Viton

3

⁄8 x 1⁄4 60

TYVT Series Viton

7

⁄16 x 5⁄16 60

* Contact the Sales Department for the specific part numbers of the
tubing you wish to purchase.

Spare Parts and Accessories

10

10-3

You can use an optional Peristaltic Pump Motor (Part Number
FPU5-MT) to run the pumps. Figure 10-1 shows the motor. You can
attach one pump to each side of the motor or two pumps to either
side.

Contact Sales for more information about the pump motor.

Figure 10-1. Peristatic Pump Motor

INPUT

SELECT

RPM

FLOW RATE

TUBE ID

TIME

TOTAL

VOLUME

CALIBRATE

INLET SELECT

LEFT PUMP

INLET SELECT

RIGHT PUMP

PRIME

TEMPERATURE

START
STOP

Spare Parts and Accessories

10

10-4

Notes

WARRANTY/ DISCLAIMER

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and
workmanship for a period of 25 months from date of purchase. OMEGA’s WARRANTY adds an
additional one (1) month grace period to the normal two (2) year product warranty to cover
handling and shipping time. This ensures that OMEGA’s customers receive maximum
coverage on each product.

If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer
Service Department will issue an Authorized Return (AR) number immediately upon phone or
written request. Upon examination by OMEGA, if the unit is found to be defective, it will be
repaired or replaced at no charge. OMEGA’s WARRANTY does not apply to defects resulting
from any action of the purchaser, including but not limited to mishandling, improper interfacing,
operation outside of design limits, improper repair, or unauthorized modification. This
WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence
of having been damaged as a result of excessive corrosion; or current, heat, moisture or vibra­tion; improper specification; misapplication; misuse or other operating conditions outside of
OMEGA’s control. Components in which wear is not warranted, include but are not limited to
contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However,
OMEGA neither assumes responsibility for any omissions or errors nor assumes liability
for any damages that result from the use of its products in accordance with information
provided by OMEGA, either verbal or written. OMEGA warrants only that the parts
manufactured by the company will be as specified and free of defects. OMEGA MAKES
NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER,
EXPRESSED OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED WARRANTIES
INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The remedies of pur­chaser set forth herein are exclusive, and the total liability of OMEGA with respect to this
order, whether based on contract, warranty, negligence, indemnification, strict liability or
otherwise, shall not exceed the purchase price of the component upon which liability is
based. In no event shall OMEGA be liable for consequential, incidental or special damages.

CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a
“Basic Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or
(2) in medical applications or used on humans. Should any Product(s) be used in or with any
nuclear installation or activity, medical application, used on humans, or misused in any way,
OMEGA assumes no responsibility as set forth in our basic WARRANTY/ DISCLAIMER language,
and, additionally, purchaser will indemnify OMEGA and hold OMEGA harmless from any liability
or damage whatsoever arising out of the use of the Product(s) in such a manner.

RETURN REQUESTS/INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department.
BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN
AUTHORIZED RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT
(IN ORDER TO AVOID PROCESSING DELAYS). The assigned AR number should then be
marked on the outside of the return package and on any correspondence.

The purchaser is responsible for shipping charges, freight, insurance and proper packaging to
prevent breakage in transit.

FOR WARRANTY

RETURNS, please have
the following information available BEFORE
contacting OMEGA:

1. Purchase Order number under which

the product was PURCHASED,

2. Model and serial number of the product

under warranty, and

3. Repair instructions and/or specific

problems relative to the product.

FOR NON-WARRANTY REPAIRS,

consult
OMEGA for current repair charges. Have the
following information available BEFORE
contacting OMEGA:

1. Purchase Order number to cover the

COST of the repair,

2. Model and serial number of the

product, and

3. Repair instructions and/or specific problems

relative to the product.

OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible.
This affords our customers the latest in technology and engineering.

OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2005 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,

reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without
the prior written consent of OMEGA ENGINEERING, INC.

M2219/0305

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