A Series
Knife Gate Valve – A Series
Unidirectional wafer knife gate valve designed for liquids with up to 5% suspended solids. One-piece cast body with internal guides for stable, reliable shut-off.
DN50 – DN1200
Unidirectional
Liquids up to 5% solids
One-piece cast body
Overview
The A Series is a wafer-type unidirectional knife gate valve with a one-piece cast body and internal guides that stabilise the gate and wedges during operation. The full, straight-through port ensures high flow rates with minimal pressure loss, making it suitable for a wide range of water-based and process duties.
It is designed for applications with liquids containing up to 5% suspended solids. For dry solids in gravity service, the valve must be installed with the arrow on the body opposite to the product flow.
Typical Applications
- Pulp & paper stock lines
- Process water in mining plants
- Chemical processing lines
- Food & beverage utilities
- Wastewater and sewage treatment
- Silo discharge and dry bulk handling
Technical Specifications
Sizes & Pressure
- Nominal sizes: DN50 – DN1200
- DN50–DN250: 10 bar
- DN300–DN400: 6 bar
- DN450: 5 bar
- DN500–DN600: 4 bar
- DN700–DN1200: 3 bar
Design & Connections
- Unidirectional wafer-type knife gate valve
- Full port for high flow and low headloss
- One-piece cast body with internal guides
- Face-to-face according to CMO standard
- Flange drilling EN 1092 PN10 (others on request)
Materials & Sealing
- Body: GJS500-7 ductile iron or CF8M stainless steel
- Gate: AISI 304 (iron body) or AISI 316 (CF8M body)
- Soft seats: EPDM, Nitrile, Silicone, PTFE
- Optional metal/metal seat for special duties
- Packing: PTFE, graphite or ceramic-fibre combinations
Where It Performs Best
Water & Wastewater
Ideal for treatment plants, clarifiers, inlet works and low-solids water lines in South African and African utilities.
Industrial Processes
Suitable for cooling water, filtrate, CIP returns and general utilities in mines, mills and industrial plants.
Mining & Pulp
Performs well in paper stock lines and light slurry duties where controlled shut-off is required.
Documentation
Download the official CMO Valves A Series datasheet for detailed dimensions, materials, pressure ratings and installation guidelines.
REQUEST A QUOTE
Send us your required size, pressure rating, medium, temperature and preferred materials. Our South Africa team will help specify the correct A Series configuration for your project.
Call our team
Email sales
sales@cmoafrica.co.za