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The CMO AB Knife Gate Valve is a general purpose valve with a monobloc body suitable for bidirectional service in low and medium-pressure applications.

The monobloc machine-cast body has built-in wedges that allow true bidirectional flow at the same working pressure.

This valve has a soft seat with a U-shaped rubber sealing joint covering the gate’s perimeter. An internal stainless steel wire maintains the shape of the sealing joint and keeps it in place. This design ensures a completely flat seal that prevents solid build-up and internal cavities.

The CMO AB Knife Gate Valve is suitable for liquids with a maximum solids concentration of 4%.

Technical specifications




AB series

Size range

DN50–600 (2–24”)
Contact us for bigger sizes

Pressure class

10 bar (DN50–150)
8 bar (DN200)
6 bar (DN250–300)
5 bar (DN350–450)
3 bar (DN450–600)
Contact us for other pressure classes

End connections


Actuator options

Gear operated

Material specifications


Standard: GJS-250 cast iron and CF8M stainless steel
On request: GJS-500 nodular cast iron, A216WCB carbon steel, and stainless steel alloys (AISI 316 Ti, Duplex, 254 SMO, Uranus B6)


Standard: AISI 304 and 316 stainless steel
Contact us for other materials, coatings, and finishes

Seat and max temperature

EPDM, nitrile (90°C)
Silicone (200°C)
Viton (210°C)

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1. Tell us what you need

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2. Choose the right solution

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3. Get the job done

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