Product Overview
The Z644HC double-disc gate valve was developed and successfully manufactured through years of effort by relevant researchers, drawing on the valve technology of Australia’s “Armstrong” company. This valve features a dual-disc design, and its sealing elements are made of wear-resistant metal.

Scope of Use
Suitable for inlet and outlet valves in dry ash handling systems of thermal power plants, these valves are also applicable to pipelines in industries such as mining, iron and steel, papermaking, petrochemicals, and others where media are abrasive, corrosive, powdery, or include flue gases.

Valve Model Coding Instructions

Installation and Usage Tips
1. Before installation, carefully read this instruction manual and verify the valve model, nominal diameter, and technical specifications.
2. Welding onto flanges immediately after installing valves is strictly prohibited to avoid damaging the valve’s sealing ring. The installation distance for valves pre-reserved in the pipeline should be appropriate, and gaskets must be added on both sides of the flange.
3. The centers of the two pipelines and the center of the valve’s bore should be coaxial, and the flange surfaces must be flat. Significant deviations in the flange surfaces are not permitted to ensure proper clamping and normal operation of the valve. When tightening the bolts, ensure that the tightening is uniform and symmetrical.

Product Features
1. The material inlet features full-flow without any obstructions and is equipped with a blow-cleaning device, resulting in minimal occurrences of dry ash and accumulated dust.
2. Employs metal sealing, allowing for high operating temperatures.
3. Excellent wear resistance and long service life.
4. The switch position display is accurate.
5. Can be installed at any position and angle.

Main Technical Parameters
Nominal pressure: 1.0 MPa
Medium temperature: <400℃
Strength test: 1.5 MPa
Sealing test: 1.1 MPa

Installation dimensions and outline drawing