Combined Bleeding & Venting Valves

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Industrial Air Vent Valves

Combined bleeding and venting valves are both start-up and continuous bleed/vent valves combined into one singular unit. They have both a large seat for the start-up operation and a small seat for the continuous operation, which are controlled by a float and system of levers. Both valve seats are open while the system is being filled and during operation the large seat is kept closed by the internal pressure. Any accumulating small air volumes are vented from the system via the small valve seat.

If the pressure drops below 0.1 BAR, the large valve seat can open again. If a vacuum situation occurs (eg. by a pump failure) then the large seat opens instantaneously and prevents damage. Subsequently, if a pressure surge runs back through the pipeline, the large seat closes causing the air volume which has entered to act as a damper, while escaping to atmosphere through the small seat.

Not sure where to start? For an overview of our complete range of bleeding and venting valves you can click here to get a basic summary on our different types and advantages.

Why choose Boiswood
for your Combined Bleeding & Venting Valves

Quality Products & Service Levels
World-class quality products backed by unrivalled service levels. We only partner with the best manufacturers in industry. You can trust in our 35+ years of experience.
Competitive Pricing Structures
Competitively priced products that we strive to keep consistent. We always ensure special pricing structures are considered.
Excellent Delivery Schedules
Attractive lead times that are monitored and managed, ensuring customers receive on-time deliveries. We can also ship our products internationally.
Ultra-Fast Response Times
Tired of chasing for answers? We pride ourselves on our unmatched response times. You can rely on us to provide extremely quick answers to technical and commercial queries.
Free Technical Support
On-going support for our customers to meet any evolving technical requirements. We can help size and specify solutions for even the most bespoke applications.
OEM & Custom Configurations
We sit alongside design teams to specify the right solution for your application, no matter how demanding. Whether it’s out-of-the-box or a custom design, we are up for the challenge.
Tailored Stocking Profiles
Need your products tomorrow? We’ve got you covered with our ever-growing stock profile and product portfolio. We can hold stock for you based on your consumption rates.
Servicing & Assembly Capabilities
Official and manufacturer certified in-house servicing, testing and assembly for our core products, including custom panels and subassemblies.
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