Questions about APP Products and Applications
For Questions about APP's Analytical Services, click here.
Our applications engineers have listed below the most common questions and their answers about our instruments. If you don't see your question, please give us a call at:
1-800-APP-VALV
- What type of tests do APP systems perform?
- What do I need to run a test?
- What are the working fluids that I can use for the hydraulic system?
- How does the hydraulic system work?
- How does the pneumatic system work?
- For which industries and which applications are APP instruments suitable?
- What type of information does an APP test return?
- Is a multi-sample test available?
- What is an APP Automated Pressure Regulator?
What type of tests do APP systems perform?
APP systems can be used for all different types of pressure applications. Based on control parameters such as number of pressure steps, pressurization rate, and holding time, an APP instrument can generate and control system pressure at a pre-defined pressure profile. The test data are stored in a data file.
What do I need to run a test?
APP provides the instrument, the software to control the system (run under Windows 3.1, Windows '95, or Labview 4.1), and the RS-232 serial cable. You need to provide an IBM-compatible PC to communicate with the APP instrument through the serial cable. For a pneumatic system, you also need to provide 80 PSI shop air.
What are the working fluids that I can use for the hydraulic system?
The standard working fluids are water, alcohol, and oil. Other fluids are possible, but please consult APP first.
How does the hydraulic system work?
The system is a microprocessor-controlled, fully automated pressure control system. It consists of one pressure generator, one pressure controller, two automated valves, and one pressure transducer. The pressure generator is a motorized piston. By controlling the speed and direction of the piston, and monitoring the pressure using the transducer, the pressure can be increased and decreased at controlled rates.
How does the pneumatic system work?
The system is a microprocessor-controlled, fully automated pressure control system. It consists of one gas booster, one reservoir, one pressure regulator, one pressure controller, one or more automated valves, and one or more pressure transducers. The gas booster is driven by shop air and raises the pressure of the inlet gas. This high pressure air is stored in the reservoir. The pressure regulator is used to adjust the system pressure to the desired level. Pressurization and depressurization are controlled by the automated valves, which consist of metering valves to control the flow and solenoid valves to direct the flow in and out of the system under test.
For which industries and which applications are APP instruments suitable?
Typical applications include simulation tests for the oil-drilling process, battery cell burst test, air bag inflator burst test, high pressure chamber fatigue test, multi-gauge test and calibration, and supercritical fluid extraction.
What type of information does an APP test return?
A typical report contains all time and pressure data generated during the test. The user can determine the time interval for recording the test data. The pressurization rate data are optional.
Is a multi-sample test available?
Yes. Please consult an APP representative.
What is an APP Automated Pressure Regulator?
The APP Automated Pressure Regulator is a standard manual pressure regulator than has been modified so that the pressure output of the regulator can be changed by computer or other electronic means.
Questions about APP's Analytical Services
Our Analyical Representatives have listed below the most common questions and their answers about our analyical services. If you don't see your question, please give us a call at:
1-800-APP-VALV
- Do you offer discounts for multiple samples?
- Do you offer guaranteed turnaround times?
- How can we receive our sample results?
- How can we pay for our sample testing?
- Can my samples be returned to me?
- How can I be sure that my competitors won't find out about my samples?
- How many pressure gauges can you calibrate simultaneously?
- If I have a specialized pressure and flow application, and I don't see a test for it what should I do?
Do you offer discounts for multiple samples?
Yes. With more than nine samples on one PO number, you receive a discount. Discounts start at 10% and increase up to 25%, depending on the quantity.
Do you offer guaranteed turnaround times?
Yes. Our typical turnaround time is 1-2 weeks. We are also able to guarantee a 5 day or 1-2 day turnaround for an additional charge.
How can we receive our sample results?
We provide fax, email, hard copy, and Excel-based results to suit any need.
How can we pay fo our sample testing?
PMI / APP accepts PO numbers, Visa, MasterCard, and American Express.
Can my samples be returned to me?
Yes.
How can I be sure that my competitors won't find out about my samples?
APP will gladly sign a non-disclosure agreement or other legal form to ensure that your proprietary samples are never discussed with other customers.
How many pressure gauges can you calibrate simultaneously?
As many as 10.
If I have a specialized pressure and flow application, and I don't see a test for it, what should I do?
Contact APP at 1-800-APP-VALV, or send us an email describing your application. We'll work with you to find a solution.
