Skip to Content Skip to Navigation

The CMO UB Knife Gate Valve consists of two fully machined parts assembled with screws to create a solid body. This allows the valve to support the same pressure from either flow direction. Additional internal guides enable the gate to move smoothly through the stroke.

The seal is sandwiched between the split body and secured with screws. It’s reinforced with a metal core up for valves up to DN 600 and an outer rim for larger sizes. There are no internal cavities with such a completely flat seal, preventing the accumulation of solids.

This valve can be customised with a variety of body, gate, and seat materials, as well as other accessories, to suit your specific working conditions.

The CMO UB Knife Gate Valve is suitable for clean liquids and liquids with some solids.

Technical specifications




UB series

Size range

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

Pressure class

10 bar (DN50–200)
7–10 bar (DN250–300)
6–10 bar (DN350–400)
4–10 bar (DN450–600)
2–10 bar (DN700–1400)
2–6 bar (DN1600–2000)

End connections


Actuator options

Gear operated

Material specifications


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


Standard: AISI 304 and 316 stainless steel, Duplex (for high pressures)
Contact us for other materials, coatings, and finishes

Seat and max temperature

EPDM, nitrile (90°C)
Silicone (200°C)
Viton (210°C)
PTFE (250°C)

How we help you choose the right valves:

1. Tell us what you need

Talk to our experts about your application, which valves and controls you need, and any repair or maintenance concerns.

2. Choose the right solution

We’ll do all the analysis, discuss the options with you, and make a recommendation—the valves we’d choose in your shoes.

3. Get the job done

Get the right valves for the job, fitted out, tested, and ready to install. We’ve got your back with ongoing repairs and maintenance.

Talk to a valve specialist

Got questions? Need advice? Our valve specialists can give you practical advice to help you get on with the job.

Valve automation & repairs

Actuators. Positioners. Controls. Valve repairs. Whatever you need, our valve workshop can handle it.