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The CMO L Knife Gate Valve has a split cast iron body that is fully machined and reinforced to form a solid body. A through-conduit gate provides continuous flow with no cavities or turbulence. This enables true bidirectional sealing at the same pressure in either flow direction.

The half-moon shape of the gate allows it to cut through thick media. Internal slides allow the gate to smoothly open and close. Dual glands eliminate fluid discharge during the open/close cycle.

Choose from three dual seat options which can be further reinforced with a deflector cone to protect the valve from abrasion and channel the flow to the centre of the bore.

The CMO L Knife Gate Valve is suitable for dry solids and liquids with up to 20% solids concentration. This valve is also recommended non-horizontal installation as the dual sleeves keep the ported gate exactly in column.

Technical specifications




L series

Size range

DN50–2000 (2–80”)
Contact us for bigger sizes

Pressure class

10 bar (DN50–150)
8 bar (DN200)
6 bar (DN250–300)
5 bar (DN350–400)
3 bar (DN450–600)
2 bar (DN700–1400)
Contact us for other pressure classes

End connections


Actuator options

Gear operated

Material specifications


Standard: GJL-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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