Self‑closing systems for double‑leaf gates (DZUM), side doors and service doors

The construction industry is increasingly turning to solutions that genuinely enhance the safety and convenience of building operation. In double‑leaf gates (DZUM), as well as in side doors and service doors, self‑closing systems play a key role – they ensure controlled, consistent closing of the leaves and reduce the risk of leaving the passage open. However, if a door closer hold‑open device is used, the door will remain in the open position.

This article discusses where and why it is worth using a door closer, what to consider when selecting one, and how proper installation and adjustment should be carried out.

Safety and Access Control

Self‑closing systems used in double‑leaf gates support safety by automatically closing the gate after a user passes through or a vehicle drives by. This reduces the risk of uncontrolled access to the premises or facility and, in the case of company sites, minimizes losses resulting from leaving the gate or door in an open position—unless a hold‑open device has been applied. Controlled closing also improves the operating smoothness of the leaves and stabilizes their position in the closing zone.

DZUM gates, side doors and service doors are equipped with an opening restrictor that protects the leaf from hitting the wall (replacing a traditional floor‑mounted stop). Additionally, a hold‑open function has been incorporated into the door closer, allowing the door to remain open at a selected angle, depending on adjustment settings.

Energy Efficiency and Tightness

A closed gate and door mean reduced heat loss and greater user comfort, especially when the gate forms part of the building envelope. A door closer helps limit drafts and temperature fluctuations. In practice, this translates into improved indoor conditions and more predictable heating and cooling costs.

Service door in the gate – why the door closer is essential

In gates with an integrated service door, the door closer plays a particularly important role: after the user passes through, the door must close automatically and securely. The microswitch enables safe lifting and lowering of the entire gate—an unclosed service door may block gate operation, increase the risk of damage, and reduce tightness and safety. For this reason, not only the presence of a door closer is important, but also its correct adjustment (closing force and speed), the microswitch, and proper interaction with the lock and seals.

Installation of self‑closing systems in double‑leaf gates, side doors and service doors

Key installation and adjustment elements

Door closer installation should take into account the weight of the leaf, its dimensions, the opening method, and operating conditions (e.g., wind exposure, intensity of use). Proper placement of the mounting components and maintaining installation geometry in line with the manufacturer’s recommendations are crucial, as incorrect installation may cause the door closer to close the door too slowly, too aggressively, or fail to close it at all. After installation, adjustment of operating parameters is essential, especially the closing speed and the so‑called final latching action, which ensures the leaf is firmly pulled into the fully closed position.

Operational Challenges and Practical Solutions

The most common issues arise from the width and weight of the door leaf, as well as external conditions (wind gusts, temperature changes). In such cases, it is crucial to match the class and characteristics of the door closer to the actual operating conditions and to carry out periodic performance checks. Regular inspection and servicing (e.g., verifying fixings, settings and smooth operation) extend the system’s service life and ensure consistent, safe closing.

Technologies in Self‑Closing Systems

Mechanisms and functions supporting user comfort

Modern solutions include, among others, hydraulic mechanisms that ensure smooth, controlled movement of the leaf. Depending on the application, functions such as two‑stage closing speed adjustment (main closing and final latching), opening damping or delayed closing—which facilitates passage through the service door—can be particularly useful. The selection of functions should be based on the intended use: the requirements for a frequently used service passage differ from those of an entry gate exposed to wind.

Summary

Self‑closing systems used in double‑leaf gates (DZUM), side doors and, in particular, service doors enhance safety, tightness and everyday user comfort. In gates with an integrated service door, the door closer is a key component, as it ensures automatic closing and thus allows safe lifting and lowering of the entire gate. Proper selection, correct installation and precise adjustment are the factors that determine the reliability and operating comfort of the whole solution.