Check valve RZN


Record of reliability

The RZN has an excellent record of reliability in critical applications where other check valves have failed.

The duo-eccentrically mounted disc is hydrodynamically designed for low pressure loss and freedom from jamming at the seat. The special ADAMS damping system ensures tight and progressive shut-off against reverse flow and offers long service life.

Compact design

The compact design allows installation in confined spaces. All internal screws on ADAMS non-return valves are mechanically locked.

- non-return valve with controlled, non-slam closure
- resilient seal or laminated metal-to-metal seal

- triple offset design with inclined conical sealing system
- adjustable hydraulic damping system, located externally and separated from the media

- complete pump protection
- low flow loss
- progressive sealing system
- axial pressure balanced shaft seals for low friction
- auto-closing

- damper adjustment locking
- additional screw safety device
- prepared for retro-fitting of counterweights if flow conditions change

Nominal Diameters:
150 mm / 6 inches to 1000 mm / 40 inches

Temperature Range:
-50°C / -58°F to +200°C / +392°F

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

- damping system for opening
- flow control valves
- disc locking device, mansafe design
- additional counterweight
- vulcanized hard rubber coating
- butt weld ends