Union Door Closer – Heavy Duty Adjustable
• Fully adjustable hydraulic control for sweep speed and latch speed
• Heavy-duty steel construction for durability in high-traffic environments
• Adjustable backcheck protects against door and frame damage from violent opening
• Easy surface mount installation on door and frame (top jamb mount)
• Suitable for a wide range of interior and exterior door applications
• Provides reliable, automatic closing for safety, security, and energy efficiency
• Smooth, consistent operation reduces wear on door hardware
• Available in multiple power sizes (Size 2, 3, 4) to match door weight
• Trusted brand in commercial and institutional door control
• A cost-effective solution for professional-grade door management

About Union Door Closer – Heavy Duty Adjustable

Ensure safe, controlled, and reliable door operation with the Union Door Closer, a heavy-duty mechanical closer designed for commercial, industrial, and residential applications. This robust door closer provides consistent closing power, preventing doors from slamming, staying open, or closing too quickly. The Union Door Closer features a fully adjustable hydraulic mechanism that allows you to fine-tune both the closing speed (sweep speed) and the final latching speed (latch speed) to suit the door’s weight and usage environment.

Its durable, zinc or powder-coated steel body is built to withstand high-traffic use, while the adjustable backcheck feature helps cushion the door if it is thrown open forcefully, protecting the door, frame, and surrounding walls. Designed for easy surface mounting on the door and frame (top jamb mounting), the Union Door Closer is a versatile solution for offices, schools, hospitals, retail stores, and apartment building common areas. With its proven reliability and customizable settings, the Union Door Closer offers professional-grade door control that enhances safety, security, and longevity.

What is the Primary Function of a Door Closer?

The Union Door Closer performs three critical functions:
1. Automatic Closing: Ensures the door closes completely and consistently after being opened, which is essential for fire safety, security, and climate control.
2. Speed Control: Regulates how quickly the door closes through its swing (sweep speed) and its final movement into the latch (latch speed).
3. Force Control: Provides adjustable closing power to match the door’s weight and any external factors like wind or HVAC pressure.

How Do You Adjust the Closing Speed and Power?

The Union Door Closer is easily adjustable using standard tools. It typically features two adjustment valves (screws):
– Sweep Speed Valve: Controls the main closing speed from the open position to approximately 15 degrees from closed.
– Latch Speed Valve: Controls the final closing speed for the last 15 degrees, ensuring a secure, quiet latch.
Turning these valves clockwise (in) slows the speed, while turning counterclockwise (out) increases it. Always make adjustments in small increments.

What is “Backcheck” and Why is it Important?

Backcheck is a feature on the Union Door Closer that provides resistance when the door is opened beyond a certain point (typically around 70-80 degrees). This resistance cushions the opening swing, preventing the door from being thrown open violently and damaging the door, hardware, or adjacent walls. The backcheck on a Union Door Closer is a valuable protective feature in high-traffic or public areas.

Where is it Typically Installed?
The Union Door Closer is designed for surface mounting. The most common installation is the regular arm application : the closer body is mounted on the door’s push side (the side you push to open), and the arm is attached to the top of the door frame (header). Other configurations are possible, but this is the standard, straightforward installation for which the Union Door Closer is optimally designed.

Is it Suitable for Both Interior and Exterior Doors?
Yes, the Union Door Closer is suitable for heavy interior doors (like entryways to common areas) and many exterior doors. For exterior applications, ensure you select a model with an appropriate finish (e.g., powder-coated) that provides corrosion resistance. Exterior doors may require a higher power size (e.g., Size 3 or 4) to compensate for wind pressure. Always check the manufacturer’s specifications for recommended door weights and environmental ratings.