Peristaltic pump by rinoraj

26
RINO RAJ P7- 457, SCTCE. M o n d a y , J u n e 1 3 , 2 0 2 2 1 PERISTALTIC PUMP

description

this is a short description of peristaltic pump technology........mistakes are to be forgiven..thnks

Transcript of Peristaltic pump by rinoraj

Page 1: Peristaltic pump by rinoraj

April 1

3, 2

02

3

1 RINO RAJ

P7- 457,SCTCE.

PERISTALTIC PUMP

Page 2: Peristaltic pump by rinoraj

April 1

3, 2

02

3

2

INDEX1. INTRODUCTION

2. DESCRIPTION OF PUMP

3. WORKING OF PUMP

4. TYPE OF PUMPS

5. TUBE SELECTION FACTORS

6. TUBING MATERIALS

7. ADVANTAGES & DISADVANTAGES

8. APPLICATIONS

9. CONCLUTION

Page 3: Peristaltic pump by rinoraj

April 1

3, 2

02

3

3

INTRODUCTION

1. Peristaltic pump is a positive displacement pump, used for a variety of fluids.

2. Fluids include a wide range of viscous materials that cannot be pumped by common pumps.

3. Fluids flow through a flexible tube fitted inside a circular casing.

4. The casing has a central rotor on which a number of ‘rollers’ or ‘shoes’ are attached.

5. The rollers push the fluids through the tube by physically compressing the tube.

6. The rollers does not come in direct contact with the fluid, and so it is used where fluids should be clean and cross contamination should not occur.

Page 4: Peristaltic pump by rinoraj

April 1

3, 2

02

3

4

DESCRIPTION OF THE PUMP1. The peristaltic pump has a hollow curved casing having

semicircular or 360 degree rotation. Casing is mainly steel.

2. Inside the casing there is the tube, placed along the curved surface. Silicone tube is the most used type.

3. At the center there is the rotating spindle on which rollers are attached. Rollers may be fixed radially outward or in a concentric manner. Roller edges should be very smooth to prevent wear or tear on the tube surface.

4. Inlet and outlet valves are also provided sometimes.

Page 5: Peristaltic pump by rinoraj

April 1

3, 2

02

3

5

WORKING OF PUMP Priming should be done. Fluid enters the casing cavity via tubing. There are rollers inside the tubing attached on the central

spindle. These spindles are rotated by suitable motors. The rollers are under squeezing contact with the peristaltic

tubing. The fluid that enters the tubing are physically pushed or

squeezed away by the roller, towards the outlet. The rate of fluid flow can be increased by increasing the

roller rotary speed.

Page 6: Peristaltic pump by rinoraj

April 1

3, 2

02

3

6

ANIMATIC REPRESENTATION

Page 7: Peristaltic pump by rinoraj

April 1

3, 2

02

3

7

Page 8: Peristaltic pump by rinoraj

April 1

3, 2

02

3

8

TYPES OF PERISTALTIC PUMP

1) HOSE PUMP Hose pumps work under high pressure, up to 10 bars. Casing and rollers are filled with lubricant to prevent

abrasion and to dissipate heat. Reinforced tubes called ‘hoses’ are used and hence the

name ‘hose pump’.

2) TUBE PUMP Low pressure type Casing and rollers are dry and use non-reinforced tube. work below 5bars.

Page 9: Peristaltic pump by rinoraj

April 1

3, 2

02

3

9

3) 360 DEGREE ECCENTRIC DESIGN The casing has a full 360 degree inner cavity There is only one roller fitted on an eccentrically

arranged shaft, compressing a low friction tube.

Page 10: Peristaltic pump by rinoraj

April 1

3, 2

02

3

10

BENEFITS OF 360 DESIGN

More flow per revolution Only one compression and expansion per cycle At similar performance points this design pump

runs more slowly, thus longer tube life can be achieved , than pumps with multiple shoes or rollers.

Page 11: Peristaltic pump by rinoraj

April 1

3, 2

02

3

11

TUBE SELECTION FACTORS

Peristaltic pump is increasing in popularity because of its contamination free fluid transfer . Each application has its own type of tube material. So when designing, tube material selection, is an important factor. The factors are

1) Chemical compatibility

2) Pressure

3) Temperature

4) Dimension

5) Tolerance

6) Life expectancy

7) Gas permeability

8) Transparency

9) Regulatory approval

10) Cost

Page 12: Peristaltic pump by rinoraj

April 1

3, 2

02

3

12

1) Chemical compatibility Tubing material should be compatible with the fluid

chemistry. There are compatibility charts created by manufacturers. Even if one tube material is chemically compatible

sometimes it may not be withstand the stresses created by the rollers.

If not compatible, it may cause failure and leakage. Even trace amounts of some acids can cause failure,

though the main ingredient does not. To check the compatibility ‘immersion test’ is done. Poly-tetra-fluoro-ethylene(PTFE) is a material that can

withstand may known industrial chemicals.

Page 13: Peristaltic pump by rinoraj

April 1

3, 2

02

3

13

2) Pressure Pump applications can be limited by the pressure

capabilities of the tubing. Typical pressure ranges are 1bar and 5bar. Silicone is the material with the lowest pressure working

capabilities and Neoprene with the highest. Recently developed materials can stand up to 10bars. While designing the engineer should ensure that the

average pressure in the system does not exceed the working pressure in the tube, or else there is a chance of rupture or leakage.

Page 14: Peristaltic pump by rinoraj

April 1

3, 2

02

3

14

3) Temperature Chemical fluids may not have any effect on tubing at

room temperatures. At high or elevated temperatures the chemicals can

attack the tubing material. So the compatibility of the tubing at varying

temperatures should be noticed. The type of chemicals that pass through and its effects

on varying temperature should be studied and a suitable tubing material should be selected from the charts.

Silicone is a typical material that can work on broad temperature differences.

Page 15: Peristaltic pump by rinoraj

April 1

3, 2

02

3

15

4) Dimensions Size of the tubing is directly proportional to the rate of

flow. The wall thickness determines the ability of the tube to

spring back to its original shape (elasticity). Undersized tubes may lead in insufficient flow since the

rollers do not come in close contact with the tube. If an Oversize tube is used the excess material can get

pinched between the rollers and cause premature failure.

Page 16: Peristaltic pump by rinoraj

April 1

3, 2

02

3

16

5) Tolerance Tolerance measures variance in dimensions. Close

tolerance-give better performance i.e. greater compatibility and repeatability. Great tolerance cause unpredictability.

6) Tubing life expectancy Material with longer life, is economical, in long run. Engineers should know the life span of a given material. This knowledge help in taking preventive measures , or

calculating maintenance time to replace tubing before it fails.

Page 17: Peristaltic pump by rinoraj

April 1

3, 2

02

3

17

7) Transparency Decides whether fluid should be seen. If the fluid is sensitive

to light opaque tubing material should be selected. If transparent we can detect the absence of flow, Presence of

air bubbles, particulates or contaminants in the tubing. Materials like Tygon or Silicone are used for transparent

tubing.

8) Gas permeability For gas sensitive liquids, the tubing material should be least

permeable to gases to prevent oxidation and cell culture. Silicone is a highly permeable material while thermoplastics

are impermeable and so used. A less permeable material will prevent problems associated

with exposing fluid to air.

Page 18: Peristaltic pump by rinoraj

April 1

3, 2

02

3

18

9) Regulatory approval The final tube product (pharmaceutical applications) should

be inspected for specific standards and guidelines. Some of approval associations are United states

pharmacopoeia (USP) , European pharmacopoeia (EP), US food and drug administration (FDA), National sanitation foundation (NSF).

10) Cost Cost is an last but not least factor of tube selection. Selecting a cheap material is not economical as its life span

may be low and material with great life might be costly. So selecting the right material with least loss is essential.

Page 19: Peristaltic pump by rinoraj

April 1

3, 2

02

3

19

TUBING MATERIALSThere are several material now available

for tubing they are

1. MARPRENE

Marprene is a thermoplastic material. It is an exclusive product made by the Watson-Marlow Bredel’s tube manufacturing company. Its features are

wide chemical compatibility, resistant to oxidizing agents like ozone compounds.

Opaque to visible and ultra-violet rays Has low permeability to gases like oxygen , carbon dioxide

and nitrogen

Page 20: Peristaltic pump by rinoraj

April 1

3, 2

02

3

20

2. BIOPRENE Bioprene offer similar benefits as marprene Bioprene has longer life span It can handle fluid temperatures upto 80 degrees Bioprene can be sterilized with ethylene oxide or gamma

irradiations.

3) SILICONE Is the widely used laboratory tubing. Mainly used for small tubing bore ( upto 9.6mm). Platinum-curing is provided to prevent contamination to the

fluid. This material is used in medical devices,

chemical analysis etc.

Page 21: Peristaltic pump by rinoraj

April 1

3, 2

02

3

21

4) NEOPRENE Useful for abrasive slurries Sustained pressure applications bore sizes above 12.6mm As neoprene has a greater permeability, marprene is

mostly used.

Page 22: Peristaltic pump by rinoraj

April 1

3, 2

02

3

22

ADVANTAGES & DISADVANTAGES

ADVANTAGES Non contamination Inexpensive to manufacture Low maintenance Easy to sterilize Cost effective operation

DISADVANTAGES operator need good knowledge. Selection of tubes for the required purposes can be

sometimes difficult. Tube life is limited.

Page 23: Peristaltic pump by rinoraj

April 1

3, 2

02

3

23

APPLICATIONS OF PERISTALTIC PUMP

Dialysis machine Open-heart by pass machines Sewage sludge Analytical chemistry experiments Food manufacturing industries Pharmaceutical production Construction-pumping cement Pulp and paper industries Aquariums ; etc.

Page 24: Peristaltic pump by rinoraj

April 1

3, 2

02

3

24

CONCLUTION

Peristaltic pumps have become a critical and reliable part of processes ranging from chemical transfer to pharmaceutical processing to wastewater treatment. Their versatility and ease of use has helped them meet a multitude of fluid-handling challenges.

Page 25: Peristaltic pump by rinoraj

April 1

3, 2

02

3

25

REFFERENCE

www.peristalticpump.info www.wikipedia.com www.vectorpumps.com www.lplc.com

Page 26: Peristaltic pump by rinoraj

April 1

3, 2

02

3

26

(?)’s