XPT introduces our New and Exclusive "Automatic Smoke Generating" Duct Leakage Testers that are only available through XPT. Our latest automatic pressure controlled, smoke generating duct leakage testers utilize a motorized variable inlet damper that is managed by a simple, manually adjustable static pressure control guage (optional digital guages available) for easy setpoint adjustments to allow your tester to automatically maintain your required test pressure settings. No longer is manual adjustment of your duct leakage tester is required. All testers include our new, and exclusive "HI/LO Scale " adjustable orifices, that provide unprecedented versatility like no other. XPT provides the most advanced, cost effective duct leakage testers on the market.
Setting up and configuring the Automatic Digital Smoke Generating duct leakage testers are the same simple operation as our standard models for use in either positive or negative duct pressurization testing which utilize our Quick Seal connection design. As with our standard models each connection consists of a heavy gauge rolled lip collars that are designed to precisely sit flush and seal with matching hose adapter connection. The connection is then quickly locked and securely sealed with a Forever Clamp from KBDuct. It is an all welded stainless clamp which is fitted with a heavy duty, continuously reusable O-ring sealing gasket which have no perforations to fatigue or tear which is backed by a forever guarantee. See the following photos demonstrating XPT's Automatic Vari-Tune airflow adjustment and our Quick Seal connection design for configuring your tester for either positive or negative pressurization testing requirements.
XPT's Exclusive Adjustable Orifice Tubes
XPT's Adjustable Orifice Tubes were designed not only to meet the requirements specified by SMACNA HVAC Air Duct Tester Guideline Requirements, but also provide our testers with unprecedented versatility like no other in the industry. With our adjustable orifices, you get two scales of operation. HIGH SCALE provides a standard or normal readings that you would find on most fixed orifice testers. LO SCALE provides that extra versatility needed when fine tuning any system when it becomes tighter and more accurate readings are needed to read the lower cfm values. Also having a LO SCALE setting, allows our larger size testers to be used accurately on some smaller systems.
Configuring for HIGH SCALE Readings
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Remove locking pin from locking hole on adjustable orifice. |
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Set adjustable orifice to HI SCALE setting (maximum position) |
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Insert locking pin into locking hole on adjustable orifice. |
Configuring for LO SCALE Readings
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Remove locking pin from locking hole on adjustable orifice. |
Set adjustable orifice to LO SCALE setting (minimum position) |
Insert locking pin into locking hole on adjustable orifice |
Each orifice tube is built from one piece, large gauge, welded seam galvanized steel tubes for long term durability and consistent operation of your duct tester. Each tube is matched with a specifically designed adjustable orifice flow sensor that reads the difference in pressure between the HI port and the LO port which is used to determine the air flow. The HI port senses total pressure and the LO port senses static pressure. The difference between these signals varies approximately with the square of the air velocity. This difference of pressure is measured with a manometer included with each duct leakage tester. (See example calibration chart below)
XPT Sample Calibration Chart
Click here to super-size image
Each duct leakage tester and adjustable orifice tube is individually tested and calibrated for each scale prior to shipment to our customers and come with a certificate of calibration which is traceable to NIST standards. From each calibration derives a unique calibration table which is used to determine airflow leakage versus the differential pressure readings from your duct leakage tester's manometer. XPT recommends calibration of your duct tester every 2 years. To help preserve your calibration between that time, ensure that your duct leakage tester's differential tube, differential flow sensor, gauges and connections remain undamaged and free from any debris or dirt.
Optional Sensocon Digital Gauges
Sensocon series digital gauges are a patent pending microprocessor based digital pressure gauge for positive, negative, and differential measurement designed to be a direct replacement for mechanical gauges. These gauges utilize an extremely stable piezo resistive sensing technology to give a standard full scale accuracy of 1%. For applications requiring better accuracy, they are also available with 0.5% accuracy. Sensocon gauges also has an optional 4-20 mA output for applications requiring an output signal. The A2 features a bright LED display and process arch, which gives the gauge improved readability and precision. Each gauge can be programed to provide direct cfm readings for simple use and operation. They also features 5 user selectable engineering units including in. w.c., mm w.c., cm w.c., kPa, and Pa. Sensocon gauges offer an improved look, performance and user friendly readouts compared to mechanical gauges.
Sensocon Digital Programmable Gauges
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Sensocon A2 standard digital gauge optionally used on XPT standard testers. |
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Sensocon A4 programmable digital Gauge optionally used on XPT automatic testers |
Industry Demand
"Global Warming" has become a serious issue involving everyone and everything including the HVAC Industry. As this threat continues, state and federal regulations are continually changing and becoming more stringent in their energy guideline design requirements for HVAC designers. Because of this, HVAC systems are being more closely scrutinized than ever before and will continue to be as long as global warming continues to be a threat. With changes constantly being implemented into HVAC design guidelines, duct leakage requirements can be expected to be less than 1 percent of the total system CFM design. To meet the challenges of these ever changing requirements, XPT offers a new generation of duct leakage testers to meet these new challenges that face contractors in the HVAC industry today and tomorrow. Our duct leakage testers were not only designed to be more advanced and efficient, they were also designed to be economically priced for almost any kind of budget. We guarantee our testers with a 5-year warranty and product support to ensure your testers continually operate and satisfy all your testing requirement needs. Our standard line of testers can accommodate a variety of usage, including residential. light commercial, commercial & industrial systems. See the following illustrations below which shows how our Duct Leakage Testers are used in a typical Duct Systems.
Positive Duct Pressurization Testing
Negative Duct Pressurization Testing
High Pressure Fan Blowers
Every XPT Duct Leakage Tester comes with a Type B spark resistant, high pressure fan blower which is initially setup and shipped to operate at 115-volts, single-phase, 50 or 60-Hertz power (except DLT8-1800 which can only be wired for 230-volts single-phase, 50 or 60-Hertz power). Fan blowers are also capable to operate at 230-volts, single-phase, 50 or 60-Hertz power and can be configured prior to delivery per customer request. If any of our standard duct leakage test kits do not satisfy any special testing requirements you might have, you can call us to special order and customize a duct leakage tester with a variety of other high pressure fan blowers to meet any special testing requirements you might have. To add even more flexibility to your duct leakage testing needs, a variety of fan blower wheels can be special ordered to change the operating parameters of your existing fan blower if needed. Call us at XPT for more information regarding special order requirements. To choose the right kit for you, See The Duct Leakage Test Kit Selection Chart for our standard models located below:
XPT Duct Leakage Tester Selection Chart
Click here for duct leakage tester calculation chart
Duct Leakage Tester Contents
- Calibrated Adjustable Orifice Differential Tube w/flow sensor
- Certificate of Calibration with Calibration Table
- Type B spark resistant, high pressure fan blower with motor
- XPT Pressure Control Damper (manual or automatic)
- Vinyl differential and static tubing.
- System static pressure probe
- 12.5-ft flexible duct w/ XPT's Quick Seal connections and clamps
- Standard: (2)Dwyer 2000 Series differential manometer w/accuracy 1% of full scale.
- Automatic: (1)Dwyer 3000 SGT Series Photohelic Differential Pressure Switch/Gage w/accuracy 1% of full scale. (1) Dwyer 2000 Series differential manometer w/accuracy 1% of full scale.
- XPT Duct Leakage Test Cart
*Note: Duct Testers are Special Order Items. Custom duct tester configurations are also available. Call for pricing and availability.
