Kromschroder Tightness control TC1V05W/W 84765541

The Kromschroder TC1V05W/W 84765541 is a tightness control unit designed to test the tightness of two automatic shut-off valves before burner ignition or after shutdown. It features an adjustable measurement time from 5 to 30 seconds, factory-set to 30 seconds, and operates with an inlet pressure range of 10 to 500 mbar. The device has a valve opening time of 3 seconds, a maximum input current of 5000 mA, and a switching cycle rating of 250,000 cycles per EN 13611. It is suitable for use with natural gas, town gas, LPG (gaseous), biogas (max. 0.1% H2S by volume), and air, and is certified to SIL 3 according to EN 61508. The unit has a protection class of IP65, an impact-resistant plastic body, and a net weight of 0.57 kg.

When selecting a tightness control unit of this type, ensure compatibility with the valve system, including the valve opening time and the ability to handle the required inlet pressure range. The device must be installed within the specified medium and ambient temperature range (-20 to 60 °C) and at an altitude not exceeding 2000 meters. Electrical connections should use cables with a cross-section between 0.75 and 2.5 mm², and the input current at terminal 1 must not exceed 5 A. The measurement time should be adjusted according to the system volume and permissible leak rate, and the unit must be mounted in a location that meets the IP65 protection requirements.

Typical failures of tightness control units include malfunction due to contamination or condensation in the gas, which can cause incorrect pressure readings or failure to complete the test cycle. Overheating from prolonged exposure to high ambient temperatures can accelerate aging of elastomer components, leading to leaks or erratic operation. If the unit fails to reset or the fault signal remains active, check the valve outputs and safety interlock connections for shorts or open circuits. Additionally, verify that the supply voltage and input current are within specified limits, as exceeding the maximum current can damage internal components.