doe for the customer chris vandegrift v.p. of engineering selas heat technology
TRANSCRIPT
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?