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Dual  O-Port Gate Valve (DOPGV)

Dual O-Port Gate Valve (DOPGV)

Dual’s O-Port Gate Valve has a Stainless Steel gate machined with a round orifice port, in line with seat ID when the valve is in the open position. When the valve is closed the ported gate will move downwards sealing the port.

Due to the seal being constantly engaged against the gate, stroking the valve closed forces the gate progressively between the two matching sleeve ends until it reaches the fully closed position – at which point the sleeves each butt up tightly against either side of the gate, effectively sealing and completely containing the line pressure. Build up of material to prevent full gate travel is eliminated as there are no areas for such material to accumulate. Any material discharged between the sleeves during stroking open or closed is collected within the containment area of the valve body and drained via the multiple flushing ports in the body. The Ported Gate Valve can be used as a man-safe line blanking valve.


DOPGV Features

240 Psi (16 Bar).

Double seat design for heavy duty slurry service.

Ease of replacement of seat ring sleeves.

Quick installation.

Self cleaning.

Bubble tight shutoff.

No clogged bonnet to impede flow.

External epoxy coated.

Easily adapted to suit most actuators.

Low maintenance requirements.

Suitable for wet or dry service.

Bi-directional flow.

Open/closed indicator sleeve.

Wide range of elastomers available.

Light weight for easier handling.

No seat cavity where solids can collect and prevent full gate closure.

Lock out feature.


50mm to 1500mm.


Wafer pattern Cast SG Iron, Fabricated Steel, Epoxy Coated.


DN50 to DN600 rated to 360Psi (25 Bar).

DN650 to DN1500 rated to 150Psi (10 Bar).


316 or 304 Stainless Steel.


Gum Rubber (standard), Nitrile, Viton, Chlorobutyl.


316 Stainless Steel standard – 316L, 317L, 17-4PH, Alloy 20, SAF 2205 S/S with optional wear coatings.


DN50 to DN1500 drilled and tapped ASME B16.5, DIN, SABS & BS Optional.


Certified chemical and physical test reports can be supplied.

Head Office

166 Rotterdam Road, Apex Industrial, Benoni, Gauteng, South Africa

Call Us

(+27) 11 422 – 4326/7