Combined function valve GBZ/AZI

GBZ/AZI

Multifunction operation

The combined function valve GBZ/AZI developed from RZN and RZI basic types provide multifunction operation as tight shutoff, flow control, and non-return valves in a single, compact unit. They can take the place of shutoff and check valves and fulfill multiple application requirements most economically.

The isolating and control actuator operates through a free travel coupling so that the freeacting hydraulically damped disc can close automatically without slamming, if the pump should fail.

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

Operation: Manual, electric, adjustable hydraulically damped

Multi-function
Compact design
Minimum pressure loss
Stable operation
Controlled, non-slam closure
Additional screw safety device
Prepared for retro-fitting of counterweights if flow conditions change

Options

Wide choice of actuators and control systems
Disc locking device, mansafe design
Additional counterweight
Vulcanized hard rubber coating
Butt weld ends
AZI: complete hydraulic unit

Features of the combined function valve GBZ/AZI

3 in 1 combination valve for tight shut-off, control, and non-return function in one compact unit
Resilient seal or laminated metal-to-metal sealing – triple offset design with inclined conical sealing system
Auto-closing
Minimum pressure loss in open position
GBZ: multirate adjustable hydraulic damping system, located externally and separated from the media
AZI: multi-rate adjustable interval damping system