42-20 - DP regulator (fixed set-point)

The Type 42-20 (and 42-25) self-operated differential pressure regulators are designed to work in large heating systems and general industrial applications. The differential pressure to be controlled is transmitted to the spring-loaded operating diaphragm in the actuator and converted into a positioning force to move the valve plug. The regulators control the differential pressure according to the adjusted set point.

The Type 42-20 is a differential pressure regulator for installation in a bypass pipe or short-circuit pipe with a fixed set point determined by the springs in the actuator.

• Nominal diameters: DN15 to DN250 (1/2" to 4")
• Pressure classes: PN16 to PN40 (Class 125 to 300)
• Materials: Cast iron, Spheroidal graphite iron, Cast steel, Stainless Steel
• Temperature range: up to 350°C (up to 660°F)
• Differential pressure set points : 0.05 to 10 bar