Clamping modules are extremely flat diaphragm actuators with short strokes for clamping tasks. Considering these extraordinary properties, there are many possibilities for clamping modules where other clamp cylinders reach their limits, such as use in narrow gaps. A clamping force of up to 1640 N is possible here. Unevenness and dimensional deviations can be compensated excellently. There are round and elongated designs with which both two-dimensional and more linear-oriented clamping tasks can be realized. Due to their hermetically sealed design, the clamping modules are also suitable for harsh, dusty ambient conditions. The properties of a hermetically sealed actuator are advantageous wherever the ambient conditions for conventional cylinders are difficult.