# Pengrong Intelligent Technology

> Automatic Gates & Industrial Door Manufacturer


## Posts

- [High-Speed Door vs Rolling Shutter Door: Which One Does Your Opening Need?](https://prdoorsfactory.com/high-speed-door-vs-rolling-shutter/): Speed, sealing, fire rating and cost — how to choose between a high-speed door and a rolling shutter for each opening in your facility.
- [How to Choose an Automatic Retractable Gate](https://prdoorsfactory.com/how-to-choose-retractable-gate/): Opening width, material, height and controls — the five decisions that determine whether a retractable gate fits your entrance.
- [How to Choose a High-Speed Door for Your Facility](https://prdoorsfactory.com/how-to-choose-high-speed-door/): Rolling or stacking? What speed, sealing and safety do you actually need? A factory engineer's checklist for specifying high-speed doors.
- [Why a Tripod Turnstile Arm Does Not Return to Its Home Position](https://prdoorsfactory.com/why-tripod-turnstile-arm-not-returning/): A tripod arm stuck off-center is usually mechanical — spring tension, bearings, debris or alignment — before it's ever electrical. Here's the isolation sequence our technicians use.
- [Integrating Tripod Turnstiles with Employee Time Attendance Software](https://prdoorsfactory.com/integrating-tripod-turnstiles-attendance/): Connect the reader, controller, attendance platform and HR system so every passage becomes a verified clock event — RFID, fingerprint, face, QR or mobile.

## Pages

- [Home](https://prdoorsfactory.com/home/)
- [FAQ](https://prdoorsfactory.com/resources/faq/): Straight answers about buying from Pengrong.
- [Privacy Policy](https://prdoorsfactory.com/privacy/): How we collect, use and protect your information.
- [Projects](https://prdoorsfactory.com/projects/): Where our gates and doors work every day.
- [Certifications](https://prdoorsfactory.com/about/certifications/): Documentation for your market's requirements.
- [Quality Control](https://prdoorsfactory.com/about/quality-control/): Seven inspection stages stand between the production line and your site.
- [Factory Tour](https://prdoorsfactory.com/about/factory/): From raw steel to finished gate — every step under our own roof.
- [About Us](https://prdoorsfactory.com/about/): HEBEI PENGRONG INTELLIGENT CO., LTD. — a factory-direct manufacturer of smart entrance products since 2012.
- [Contact Us](https://prdoorsfactory.com/contact/)
- [Resources](https://prdoorsfactory.com/resources/)


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