DOE FOR THE CUSTOMER

Chris Vandegrift

V.P. of EngineeringSelas Heat Technology

4BZR Regulator

December 2013

Objective: Launch the 4BZR – ½” regulator

Conduct performance tests with various conditions: flow rate, pressure variation, washer weights, spring properties and diaphragms.

Meet or exceed the current standard for constant pressure output from the regulator

4BZR Before Summer 2013

½” Balanced Zero Regulator

Erratic performance on shut-off

0 50 100 150 200 250 300 350 400

-0.40

-0.20

0.00

0.20

0.40

0.60

0.80

1.00

1.20

4BZR Suction Test @ 14 in-H2O Inlet

Air Flow, CFH

Out

let G

auge

Pre

ssur

e, in

-H2O

“On-Target with minimum variance.”

“Operating with minimum variance is achieved only when a process displays a reasonable degree of statistical control.”

-Walter A. Shewhart

Variation

Virtual Fishbone

5

Design of Experiments (DOE)

• Design of experiments is a branch of applied statistics that deals with… – Planning– Conducting– Analyzing– Interpreting

…controlled tests to evaluate the factors that impact the output of the regulator.

4BZR DOE – Main Effects

Main Nut Setting

Seal Nut Setting

Seal WasherDiameter

4BZR After DOE

4BZR Response Optimizer

Optimal Settings

4BZR Test Rig

Objective: To test Balanced Zero Regulators performance against quality standards. The ability to digitally record and display test data.

4BZR Marketing Claim Tests

0 50 100 150 200 250 300 350 400

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

4BZR Suction Test @ 14 in-H2O InletOutlet Pressure vs. Flow Rate

Before DOEs

After DOEs

Air Flow, CFH

Out

let G

auge

Pre

ssur

e, in

-H2O

Thank you!

Questions?