1. Wedge Flow Element 1

2. V - Shaped Restriction No critical surface dimension
Slanted upstream and downstream faces
No places for secondary phase build-up
Minimal upstream/downstream piping required
Bi-directional 2

3. Wedge Flow Element Simple Design - Easy to Understand No Moving Parts
Q P 3

4. Wedge Flow Element V1 V2
P P2
Permanent
Pressure Loss 4

5. 3” Flange Tap Connection
Wedge Flow Element
Physical Attributes
Dirty Service
Chem Tee (Flush Mtg.)
(1630LF)
3” Flange Tap Connection
(1630LF) 5

6. WEDGE Flow Element Physical Attributes
Clean Service
1/2" NPT
Connection
Pipe Tap Connection (1610LF)
1/4" NPT
Direct Connect Integral WEDGE
(1335LZ-1337LZ)
Wafer Water & Gas Injection (1615LW) 6

7. Wedge Characterized by H/D to Handle Different Flow Ranges
H/D Ratio of
0.2
0.3
0.4
0.5 H D
Determining beta ratio d/D:
Orifice Plate: d=orifice bore diameter, D=pipe inside diameter
Wedge equivalent beta ratio for H/D ratio selected:
for H/D Ratio of use ß 7

8. The Wedge Element Advantage
Flexibility and Adaptability
Wedge Element Wedge Element DP Transmitters
Process Conn Materials Connections
Threaded
Flanged
Wafer
316 SS
Carbon Steel
Hastelloy1 alloy*
Monel2 alloy*
Other exotics
Direct connected
Pipe tap
Remote seal elements
* Available upon request
1 Trademark of Cabot Group
2 Trademark of Huntington Alloy, Inc., The International Nickel Company, Inc. 9

9. The Wedge Element Advantage
Lower permanent pressure losses than orifice plate mean lower pumping costs for the life of the installation
100 -
90 -
80 -
70 -
60 -
50 -
40 -
30 -
20 -
10 -
Orifice Plate
Pressure Loss % of Meter Differential
Flow Nozzle
Wedge
Beta Ratio 8

10. Typical Linear Curve (Low Reynolds Number)
1-1/2” (40mm) Pipe Size 0.4 H/D
.920
.900
KD 2
20, , , , , , ,000
Pipe Reynolds No. RD
Calibration Performed with Water
KD 2
Calibration Performed with Glycerine
.940
.920
.900
.880
.860
.840
Pipe Reynolds No. RD

11. (High Reynolds Number)
Typical Linear Curve
(High Reynolds Number)
3” (75mm) Pipe Size
KD 2
.3H/D
Water - Average KD 2 = Air - Average KD 2 = 1.772
2.20
2.00
1.80
1.60
.2H/D
Water - Average KD 2 = Air - Average KD 2 = .995
1.40
1.20
1.00
.80
Pipe Reynolds X 1000

12. Performance Evaluation Upstream Piping Effects

13. Wedge Family of Problem Solving Flow Elements
Wedge elements are available in standard sizes of 1/2” to 24” (larger sizes available)
Pipe tap, wafer and integral Wedge elements for clean liquids, gases and steam
Remote seal Wedge elements for all fluids - clean, dirty, viscous, corrosive or erosive
Wag Wedge for Wafer and Gas Injection Systems for oil field recovery
Integral Wedge elements connect directly to DP transmitters

14. When to Use the Wedge
Chemical industry - Batching, blending, mixing dyes and viscous fluids
Petrochemicals - High viscosity and black liquors
Oil and Gas - Water injection, custody transfer
Paper and Pulp - High concentration stocks. Timber industry usage
Metals and Mining - Powdered or magnetic slurries. Abrasive flows
Cement industry - Problematic slurry flows
Power and Utilities - Fuel oil and steam flows. Boiler feeds

15. WedgeMaster Flow System

16. Chemical Tee Connection
WedgeMaster Connections
3” (76mm) Flange
Tap Connection
1630LF
Chemical Tee Connection
1630LF

17. WedgeMaster Flow System
Base System Accuracy: 0.5%
Draft Range Designed for Intended Purpose
HART Digital Communications
5 Year Warranty
Inductive Sensing
sensing & correcting of sensor temp and static press
Surface Mount Electronics
Local Zero & Span
Configures From KHT & KSSW

18. Wedge vs Orifice Plates
Comparison
Wedge vs Orifice Plates
Advantage
Lower Reynolds No.
Better Rangeability
Accuracy not Dependent on Sharp Edge
Lower Energy Costs
Five Year Warranty
Less upstream piping required
Dirty Service (Slurries, Fluids w/Solids in Suspension)
Disadvantage
Less Application History
Initial installed cost

19. Wedge vs Orifice Plate Specification Wedge Orifice Accuracy Turn Down
Reynolds No.
Output
Sizes
Straight Upstream Piping
Wedge
0.5%
4:1
>500
square root
1/2”- >24”(15 ->600mm)
6 Diameters
Orifice
0.75%
4:1
>30000
square root
>1” (>25mm)
15-30 Diameters

20. WedgeMaster vs Turbine Meter
Comparison
WedgeMaster vs Turbine Meter
Advantage
No Moving Parts
Corrosive, Dirty Fluids
Viscous Fluids
Less Pressure Loss
Disadvantage
Non-linear Output

21. Wedge vs Turbine Meter Specification WedgeMaster Turbine Accuracy
Turn Down
Reynolds No.
Output
Sizes
WedgeMaster
0.5%
4:1
>500
square root
1/2” - >24”
(15 - >600mm)
Turbine
0.5%
10:1
>30000
linear
1” - >12”
(25 - >300mm)

22. Wedge vs Vortex Advantage Disadvantage Comparison Low Reynolds No.
Viscous Fluid Applications
Requires Less Upstream/ Downstream Diameters
Better Accuracy
Slurry Applications
Disadvantage
Accuracy Affected by Density
Non-linear Output

23. Wedge vs Vortex Specification WedgeMaster Vortex Accuracy Turn Down
Reynolds No.
Output
Sizes
Straight Upstream Piping
WedgeMaster
0.5%
4:1
>500
square root
1/2”- >24”
(15 - >600mm)
6 Diameters
Vortex
1.0% +
10:1+
>10000
linear
1” - >10”
(25 - >250mm)
10-30 Diameters

24. Wedge vs Positive Displacement
Comparison
Wedge vs Positive Displacement
Advantage
Much Lower Cost
No Moving Parts
Lower Pressure Loss
Slurry Applications
Steam and Dirty Gas Applications
Disadvantage
Non-linear Output
Greater Piping Requirements
No Custody Transfer Applications

25. Wedge vs Positive Displacement
Specification
Accuracy
Turn Down
Reynolds No.
Output
Sizes
WedgeMaster
0.5%
4:1
>500
square root
1” - >24”
(25 - >600mm)
P. D.
0.5% +
20:1
variable
linear
1” - >12”
(25 - >300mm)

26. Wedge vs Mass Advantage Disadvantage Comparison Lower Cost
No Moving Parts
Lower Maintenance
More Line Sizes
Not Affected By Vibration
Disadvantage
Non-linear Output
Less Accurate
Affected by Fluid Properties