Cast iron wedge gate valve 30ch925br for manual or electric actuator Pn 2.5

Gate valves 30ch925br PN 2.5 are cast iron wedge gate valves with non-rising stems, designed for use as shut-off devices on main water pipelines, water treatment systems, and sewage systems. Operation is performed using a manual gearbox or electric actuator.

Design and Operating Principle of Cast Iron Gate Valves 30ch925br

Main Structural Components

• Body: Cast iron, flanged for pipeline connection. Contains internal sealing rings.
• Bonnet: Cast iron, bolted to the body.
• Gate (wedge): Cast iron with brass sealing surfaces. Moves perpendicular to flow direction.
• Stem: Non-rising, threaded, rotates without vertical movement relative to the bonnet.
• Threaded bushing (travel nut): Fixed in the wedge, engages with stem threads.
• Stuffing box: Provides stem sealing where it passes through the bonnet.
• Yoke assembly (actuator support): Upper valve part for actuator mounting.

Operating Principle

• Closing: When activated, the electric actuator rotates the stem via gearbox. The rotating stem engages with the threaded bushing (fixed to the wedge), lowering the wedge to seal against body seats and completely block media flow.
• Opening: Reversing stem rotation raises the wedge, clearing the flow passage.
• The electric actuator enables automatic or remote control, with limit switches ensuring proper end-position stopping.

Gate valves 30ch925br are typically installed on pipelines with moderate pressure requirements, such as:

• Water supply: Main water lines, municipal systems requiring large diameters at moderate pressures.
• Sewage: Large-diameter collectors where pressure is mainly hydrostatic.
• Irrigation and drainage systems.