Kromschroder Differential pressure switch DG10U-3 84447300

The Kromschroder DG10U-3 is a diaphragm pressure switch with a pressure range of 1–10 mbar. It features a glass fibre reinforced PBT plastic housing with a lower housing made of AlSi 12, and an NBR diaphragm. The switch operates mechanically, using a microswitch with a change-over contact, and is adjustable via a handwheel. It is silicone-free and has low gas release, with a protection class of IP54 and safety class 1. Connection is via M16 x 1.5 thread and screw terminals.

When selecting a pressure switch of this type, ensure the pressure range and connection thread match the system requirements. The switch must be compatible with the medium (gas or air) and the electrical connection (screw terminals). Installation should follow the manufacturer's guidelines, considering the ambient temperature range and ensuring proper sealing to maintain the IP rating.

Common failures include diaphragm rupture or leakage, leading to loss of pressure sensing or false triggering. The microswitch may wear out, causing intermittent or no switching. Symptoms on equipment include failure to detect pressure changes, burner lockouts, or erratic operation. Regular checks for leaks and functionality are recommended.