Back Pressure & Overflow Valves

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Universal Back Pressure Valves for all applications


Back Pressure Valves are designed to control an adjustable and constant pressure upstream of the valve. A spring keeps the valve closed. As the inlet pressure rises the valve opens.


These self-acting overflow valves are used to maintain a constant P1 (upstream pressure) within a system.


Need some extra help? For a brief summary of our self-acting control valves you can click here to get a an overview of the different types and their benefits. For a more detailed look into the operating principles and parameters you can click here to get a more detailed overview of our self-acting valves.

Why choose Boiswood
for your Back Pressure & Overflow 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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