42-10 RS - Backflow protection check valve

The Type 42-10RS is a check valve or backflow prevention device designed to protect nitrogen and compressed air networks against backflow from directly connected systems. The regulator is opened when the upstream pressure is at least 3psi/5psi (0.2bar/0.3bar) greater than the downstream pressure. It is closed automatically when the downstream pressure rises to or above the value of the upstream pressure.

The regulator closes reliably to prevent backflow from the plant into the compressed air or nitrogen network. The soft-seated plug and seat trim complies with leakage class VI.

• Nominal diameters: DN15 to DN250 (1/2" to 10")
• Pressure classes: PN16 to PN40 (Class 150 to 300)
• Materials: Cast Steel, Stainless Steel, Forged Stainless Steel
• Temperature range: up to 150°C (up to 300°F)
• Differential pressure set point: 0.2 bar (0.3 bar for DN 200 and DN250)