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Complete pump protection in sophisticated areas

Our RZN and RZI check valves offer proven pump protection for applications with liquid media. The individually adjustable damping system enables the butterfly valve to perform shock-free checking, even in critical areas.

Our RZN and RZI butterfly valves feature first-class hydrodynamic characteristics, low pressure losses and the individually adaptable damping system. The closing characteristics of the butterfly valve can be optimally adjusted to suit the needs of each system with the help of the damping system. The RZN and RZI models can also be simply readjusted to adapt to new requirements if changes are made to the system at any point in the future.

Complete pump protection

Controlled, shock-free closing

Low pressure loss

Progressive sealing

Individually adjustable damping system

Automatic mode of action

Additional screw retention

Subsequent installation of counterweight possible

RZN: DN 150 / 6 inches up to DN 1000 m / 40 inches

Temperature range
–50 °C / –58 °F up to 200 °C / 392 °F

Pressure Class
PN 10/16/25/40/64
ANSI 150/300/600

Construction lengths in accordance with
ISO 5752 BS 14 (F4)
Custom-made construction lengths on request

Valves designed in accordance with international standards, e. g
AD technical instructions, ANSI, API, ASME, ATEX, BS, DGRL, DIN EN / ISO, GOST, KTA, MSS, RCC-M

Automatically closing and adjustable hydraulically damped

The RZN and RZI check valves are ideally suited for protecting pumps for liquid media. The high flexibility of material and seal models enables the valves to be used in

a wide variety of applications. For example, a seawater model is available in stainless steel and with a hard rubber lining.

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