1. VENTURI REPLACEMENT

2. MARKET OVERVIEW Venturi Replacement
Application Specifics
System Schematics
Comparison Examples
Ground Rules
Major Competitors
Best Approach to Attack the Market
Economic Evaluation Spreadsheet

3. MARKET OVERVIEW Vacuum Venturis
Used for many years
OEM applications
Simple, small, remote vacuum uses
Compact, simple, cheap, no moving parts
Just plug into your existing compressed air line

4. Very Simple … If you stop here
MARKET OVERVIEW Vacuum Venturis
Air Compressor
Motive Air for Venturi
Very Simple … If you stop here

5. Venturis have Huge Disadvantages
End Users – Operating Costs
OEM using Venturis will look weak every time
Many Vacuum Venturi applications benefit greatly by replacement with vacuum pumps
We’ll show you when, how and why vacuum pumps or blowers are the best choice

6. APPLICATION SPECIFICS Venturi Operating Principle
Motive air from compressor
Entrained air is pulled through nozzles
Suction created at opening of each stage
Creating vacuum at system inlet

7. VISUALIZATION TECHNIQUE (using Frank’s new “Dream” Ferrari)
Going warp speed in a 35 mph zone, Led Zeppelin splitting his eardrums, Frank cracks the front windows
Cigar smoke from his illegal Cuban cigar is sucked out the window, tangled in the flowing hair of his buxom, blond bimbo

8. Now ……
Back to Reality!

9. VISUALIZATION TECHNIQUE
Key Point . . .
Massive air flow is required to develop a small amount of suction flow and vacuum
The Process is extremely inefficient

10. Rietschle Success Story
Application: Vacuum for packing machines
Replace: 27 Gast rotary vane pumps (24”HgV)
Under Consideration:
A. PIAB Venturis
B. Duplex 20 HP liquid Ring vacuum system
C. Rietschle CLFEH-501 duplex pump system (with two 20 HP motors) or a Rietschle VCEH-160 triplex system with three 10 HP motors).  

11. Rietschle Success Story (cont.)
User’s sister company used PIAB venturis
Recommended replacement of high-maintenance Gast vacuum pumps with PIAB ejectors
Customer was receptive to an economic analysis
Analysis uncovered huge energy and cost savings
Rietschle secured a significant system order
Rietschle system saved approximately:
40% power compared to the individual Gast pumps
Over 90% in power compared to the PIAB venturis, and provided more than double the air flow to their system!

12. Economic Evaluation Example
Given Conditions:
End User has (25) PIAB model MLD-100 vacuum venturis operating on his existing machines. He requires 18”HgV on his machines for pick & place operations. Current installed capacity is 62.5 scfm (PIAB literature shows that each MLD-100 can deliver “HgV X 25 = 62.5 scfm).
Customer Requirements:
Customer wants to add additional capacity and will need an additional 25 scfm. His current air compressor is fully loaded, so if he uses vacuum venturis, he will need to add additional air compressor capacity.

13. Economic Evaluation Example (cont.)
1. Based on PIAB literature, customer will need to add 10 additional venturis to obtain 25 scfm (25 scfm  ”HgV = 10 venturis).
2. Calculate air compressor airflow to operate 35 venturis (25 existing venturis plus 10 new venturis). Per published PIAB literature, each venturi will require approximately 13 scfm of air compressor capacity. 13 X 35 = 455 SCFM.
3. Estimate power consumption to produce psig. Either obtain actual compressor and motor size from a vendor, or use 4.0 scfm/HP as an estimate  4.2 = bhp.

14. Economic Evaluation Example (cont.)
4. Estimate cost of power. Assuming a power cost of $0.10/kw-hr, and 5840 hours per year operation (two shifts, 365 days per year), annual operating costs of the above system would be:
$/Yr = HP X .746kW/HP X $/kW-Hr X Hrs/Yr
= X .746 X $0.10 X 5840
= $42,917 per year operating costs for Venturis.

15. Economic Evaluation Example (cont.)
Select Rietschle vacuum pump to do the job.
a. Convert SCFM to ACFM. [ ”HgV (11.92”HgA)]
            ACFM = SCFM X (29.92 / “HgA)
            ACFM = 87.5 X (29.92 / 11.92)
            ACFM = ACFM
b. For 18”HgV, you could use a duplex VTB-250, dry running rotary vane vacuum system. Each pump has a capacity of ”HgV and uses a 10 HP motor. Two pumps running together will actually provide much more than the required capacity. By providing a central system with air receiver and vacuum switches, one pump would probably handle the requirement most of the time. For the purposes of this example, be “generous” and assume both 10 HP motors need to run continuously, for a total power consumption of 20 HP. (Actual power consumption would be closer to 10 Hp than 20 HP).

16. Economic Evaluation Example (cont.)
6. Calculate Power Cost for Rietschle System
 $/Yr = HP X .746kW/HP X $/kW-Hr X Hrs/Yr
= 20 X .746 X $0.10 X 5840
= $8,713 per year operating costs for Rietschle System.
 Annual Operating Cost Savings Using a Rietschle System
$42,917 - $8,713 = $38,484 Cost Savings
This does not even include any capital cost evaluations. If you include the cost of the initial compressor system (usually much larger and more costly than a Rietschle Vacuum System), the evaluation often looks even better.
 Payback can sometimes be a matter of months in energy savings alone!

17. Rules of Thumb Typical motive air pressures are from 60 – 100 psig
Compressors provide about 4.2 scfm per 100 psig
Compressor systems can be ball-parked at $350/HP
Depending on vacuum level, Rietschle vacuum pumps can be from 3 – 10 times more efficient than vacuum venturis
Venturis are reasonable for very small, isolated vacuum requirements if excess compressor capacity already exists
Venturis are a terrible choice for high capacity requirements

18. Rules of Thumb Venturis become less efficient at higher vacuum levels
Venturis are one of the most inefficient ways to produce vacuum
Efficiency drops as motive air pressure decreases
Paybacks can often be just a few months, especially when higher vacuum levels are required
Vacuum systems are usually smaller and less costly than the compressors required to operate venturis

19. Major Competitors
PIAB
Parker Hannifen
Thomas
Gast
SMC

20. Venturi Advantages / Disadvantages
Venturi Disadvantages
Low initial cost
Ultra-high operating costs
Compact (ignoring compressor)
Low efficiency
Simple operation (if you ignore compressor system)
Requires separate compressor, piping, valves, traps, regulators
Good for very small demands
Poor choice for higher demands
Compressors must be oversized to insure proper operation

21. Rietschle Advantages Huge energy and cost savings
Very rapid return on investment
No separate compressor system to purchase and install
Systems can run multiple machines
On-Line standby capacity
OEM’s can promote higher efficiency vs. their competition

22. Best Approach to Attack the Market
Sell to the OEM
Sell him on efficiency and operating cost benefits to his customers
Sell Users on concept of “Total System Cost”
Additional sales & profit
Vacuum pumps do a better job – more flexible
Customer can free up existing air compressors
The “KEY” is a good economic evaluation

23. Best Approach to Attack the Market
Sell to the End User
Efficiency and operating costs
Look for multiple machines and/or large requirements
Look for higher vacuum levels, where venturis are very inefficient
Ask how he is doing on compressor capacity
Customer can free up existing air compressors
Ask about future expansions and new machinery
The “KEY” is a good economic evaluation

26. Summary A Golden Opportunity We have a lot to offer
Both OEM’s and End Users Benefit
Economic Evaluation is the Key
Use the Excel Spreadsheet to make it easy