Kromschroder Gas pressure regulator VGBF40R10-3 86047410

The Kromschroder VGBF40R10-3 gas pressure regulator, SKU 86047410, is a spring-loaded actuator with a nominal diameter of 40 mm and Rp 1½" internal thread connection. It handles a maximum inlet pressure of 1000 mbar and regulates outlet pressure within a range of 10–30 mbar, factory-set to 20 mbar. This model features inlet pressure compensation, a compensation diaphragm, zero shut-off, and a built-in safety diaphragm, eliminating the need for a vent line. It is certified to CE and complies with EN 88 and EN 334 standards, suitable for natural gas, liquefied gas, and air, operating in ambient temperatures from -15 to 60 °C and weighing 2900 g.

When selecting a gas pressure regulator of this type, ensure the connection size and thread type match the existing pipework, and verify that the maximum inlet pressure and outlet pressure range are compatible with the system's operating conditions. The regulator's set point is adjustable via spring preload, and the factory setting may need to be recalibrated to the required outlet pressure. Installation typically occurs downstream of the main shut-off valve and gas filter, and upstream of the gas valve, with the regulator oriented correctly to allow proper diaphragm function.

Common failure modes for gas pressure regulators include a torn diaphragm, debris on the seat causing drifting outlet pressure, or a blocked impulse line if present. Symptoms may include unstable outlet pressure, inability to maintain set pressure, or gas leakage. Check the diaphragm for damage, clean the seat area, and inspect any impulse lines for blockages.