Back Pressure Regulators Back Pressure Regulator - RP 820 | Mankenberg Back Pressure Regulator - RP 820 | Mankenberg The Back Pressure Regulator RP 820 by Mankenberg is a precision device designed to maintain a consistent upstream pressure by releasing excess pressure downstream. It is commonly used in various industrial applications to ensure system stability and protect equipment from pressure fluctuations. The RP 820 is known for its robust construction, reliability,... View Flanged PN 10 PN 63 DIN Cast Iron