WHEN CLEAN MATTERS

February 2014 Volume 2 Issue 1

Newsletter February 2014 ABOUTCREST

GROUP Headquartered in Trenton, New Jersey, Crest is the market-leading designer, manufacturer and seller of precision cleaning and plastic welding standard products and systems based on ultrasonic technology.

WIDEDIVERSITYOFAPPLICATIONS

CREST COMPANIES AROUND THE WORLD

Crest’s products are recognized for its proprietary technologies, high quality, product breadth, and application-specific configurations. With a wide diverstiy of applications, Crest is actively involved in the automotive, electronics, home appliances, medicals, optics, packaging, aerospace and defence industries. These products and related aftermarket service are provided through a unique global sales and manufacturing platform that includes 10 manufacturing facilities and about two dozen direct sales offices across the U.S., Europe, and Asia   

NEWTECHNOLOGY

Cleaning of Heat

Exchangers using Push Pull Thickness Mode Ultrason-ics. More efficient and safer

method to clean Heat Exchangers

Page 2 Newsletter February 2014

ULTRASONICCLEANINGTECHNOLOGYWITHPUSHPULLPush-Pull transducers with near perfect, omni-directional radiation of sound waves, provide distinct advantages in cleaning applications. This is accomplished by resonating the transducer to generate larger wave amplitude. Transducers inside each end cap on the titanium rod produce cyclic positive and negative pressure waves at the frequency of operation (25kHz, 30kHz or 40kHz). The positive pressure wave acts as a pushing force on the titanium rod and the negative pressure wave acts as a pulling force (hence "Push-Pull").

WHAT IS ULTRASONICS CLEANING? The sound waves generated at high & low pressure phases in the liquid, will create microscopic vacuum bubbles that implode when the sound waves moves and the zones changes from +ve to -ve pressure. This process is called “cavitation”. Enormous localized pressures & temperature will be exerted and this will loosen the contaminants and scrubs the work piece.

During low pressure phase, the liquid molecules extend beyond its natural physical force, generating vacuum nuclei that continue to grow to a maximum size propor-tional to the applied sonic frequency. Then at high pressure phase of the next half cycle, the vacuum bubble implodes thus inducing all the energy to focus inward

The energy releases from the cavitation implosion, collides or disintegrates the contaminants allowing the cleaning detergent/ solvent to displace it very fast. Simultaneously this implosion also creates dynamic pressure to carry away contam-inants from the substrate surface.

Cumulative effect of millions of continuous tiny implosions in a liquid medium, provides the necessary mechanical energy to break up the physically & chemically bonded contaminants. The chemical composition of the medium is

Travelling through the liquid, sound wave compresses & rarefies to produce alternate zones of high & low pressure phases

Photo image of

a cavitation bubble

Page 3 Volume 2 Issue 1 ATypicalSiteSetup

EQUIPMENT Equipment Description

1 Ultrasonic Cleaning Tank 25kHz/2000W Push Pull Transducer X94 pcs : Total of 188KW / Capacity:25,300L

2 Ultrasonic Control Cabin PLC Controlled Ultrasonic Control Room

3 Storage Tank 1 CBX-0013 mixed water Storage (Capacity 14.400L x 2 room)

4 Storage Tank 2 CC 2003 mixed water Storage (Capacity 14.400L x 2 room)

5 Storage Tank 3 Dispose water Storage (Capacity 14.400L x 2 room)

6 Rinse Water Strage Tank Capacity 76,000L

7 Crane

8 Heat Exchanger Steam Heated Heat Exchanger

9 Pump 1 Flow Rate : 620L/min [ 25Hp/1775rpm/1.15 sf/3phase/60hz/18.6Kw]

10 Pump 2 Flow Rate : 620L/min [ 25Hp/1775rpm/1.15 sf/3phase/60hz/18.6Kw]

11 Generator Caterpillar 3512 engine [ 1250kva/ 1000kWatts/ 480Volts/3phase/ 1504 amps]

CLEANING PROCESS Step One Hydrocarbon Cleaning:

Detergent CC2003 10%

Ultrasonic immersion wash for 4 hours.

Step Two Rinsing

Spray rinse with hose for 10 minutes

Step Three Scales Cleaning

Detergent: CBX-0013 10%

Ultrasonic immersion wash for 4 hours

Temperature: 55C

Step Four Rinsing

Spray Rinse with hose for 10 minutes

Step Five Final Dip

Chemical: KOH0.035% Agitation: 3 times

Step Six Drying

Compress Air

Patented Push Pull Transducers

Patented Ceramic PZT Enhanced Transducers

Power Density 27 Watts per Gallon

High Efficiency of 97%

14 Gauge Stainless Steel Ultrasonic Tank

ULTRASONIC CLEANING TANK FOR CLEANING HEAT EXCHANGERS-SCAFOLDING-VALVES-PUMPS ETC.

CONTACT INFORMATION

United States Wayne Robertson Phone: 860-614-8845 wrobertson@crest-ultrasonics.com Malaysia Terry Lim Phone: 011-86-512-8818-4907 terrylim@crestcm.com