The DSS Double Block and Bleed Valve.

Two lines of protection, when you need it most.

The DSS Double Block and Bleed (DBB) valve provides the isolation you need, when you need it. Designed for Severe Service, this valve can handle Class 150, 300, and 600 pressures. The DBB eliminates the need for complicated, costly multi-valve systems while still providing you with zero-leakage protection in harsh applications. Actuation won’t be an issue either – with a variety of options available our team will be sure to find the right solution for you.

Double Block and Bleed

Work. With no limitations.

North American made Severe Service Knife Gate Valves.

From Upstream to Downstream and Everywhere In Between

DSS Valves is known for creating dependable Severe Service Valves that outlast the competition in any scenario. Just because they’re built to thrive in the most severe conditions, doesn’t mean they shouldn’t be considered for more general applications. Investing in a premium product pays dividends through increased service life and reduced downtime, making the overall cost of ownership much less in the long run.

Intro Brochure

download the intro brochure

The Intro Brochure is a quick look at DSS Valves, our features and benefits, and the actuation options available for our products.

Product Brochure

The DSS Product brochure is a deep dive into the products we sell, their technical specifications, and so much more.


The Double Block and Bleed Valve IOM host all the technical information regarding installation, operations, and maintenance for the DBB.


Download the Knife Gate Valve Infographic

This infographic shows the journey knife gate valves have taken on the quest for zero-leakage. Now, we’re here.

Product Features

The DSS Double Block and Bleed Valve is there to act as a reliable line of defence, decrease costs associated with multivalve lines, and provide a zero-leakage solution to our customers. To learn more, check out the product features of the DSS Double Block and Bleed Valve here.

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DSS Valves - DBB features

Actuation Options

Our Double Block and Bleed Valves are compatible with a wide range of actuation options.

We’re always happy to tailor the valve actuation to suit your needs. We’ll find you a solution, whether that means low profile arrangements, stem extensions or gear operators on pneumatic, hydraulic, electric or electro-hydraulic systems.

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DSS offers a variety of valve configurations, including industry-specific valves.

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