GESTRA RK 49 Instrucciones De Montaje página 13

Description
Non-return valve RK with spiral centering ring (RK 76, RK 49) or self-
centering body. Installation in any position. Exception: Valves without
spring can only be installed in vertical lines with upward flow.
1
Non-return valve with spiral centering ring
2
Non-return valve with body centering cams
3
Non-return valve with self-centering body
4
Position of guide ribs (horizontal installation)