Why Enolgas Valstop and Eurostop Check Valves Offer Superior Flow and Leak Prevention

When it comes to selecting high-performance brass check valves for plumbing, HVAC, and

industrial applications, not all designs are created equal. At Enolgas USA, our Valstop and

Eurostop check valves stand out due to their innovative internal geometry and unmatched

reliability.

Unlike traditional check valves offered by many competitors, which often feature flat internal

surfaces that disrupt fluid flow, Valstop and Eurostop utilize a specially engineered shutter

geometry. This non-flat design minimizes flow resistance and drastically reduces turbulence.

The result? Lower pressure drops and higher flow rates—a key performance metric often

measured as Kv in Europe or GPM (gallons per minute) in the U.S.

This optimized valve flow translates to better efficiency in both residential and commercial

systems, whether you’re managing potable water, HVAC coolant lines, or industrial fluid

control.

Cutaway diagram illustrating a valve in both closed and open positions, highlighting the internal mechanism and fluid flow direction.

Close up of the check valve once closed.

But superior flow is only part of the story.

Our valves also feature a precision-engineered sealing system. The shutter’s unique profile

provides a tighter, more reliable seal against NBR (nitrile rubber) or FKM (fluoroelastomer)

gaskets. This ensures leak-free operation regardless of the valve’s orientation—horizontal,

vertical, or angled—making installation easier and more versatile.

Whether you're specifying valves for a complex hydronic system, designing an automated fluid control application, or upgrading an existing brass valve setup, the Valstop and Eurostop series from Enolgas USA deliver:

• Higher GPM (Kv) values for improved system performance

• Reduced energy losses due to minimized pressure drop

• Leak-proof reliability in any installation position

• Durable materials and superior internal sealing

Ready to upgrade your check valves? Trust Enolgas USA, a leading name in brass valve

manufacturing and fluid control innovation.

Applications and Advantages of Valstop and Eurostop Check Valves in

HVAC and Plumbing Systems

At Enolgas, our commitment to engineering excellence is reflected in every component we manufacture. The Valstop and Eurostop brass check valves are not only designed for optimal fluid dynamics, but also to meet the demands of modern mechanical systems.

• Ideal for HVAC and Hydronic Heating Systems

In closed-loop hydronic heating systems, maintaining flow balance and minimizing backflow is critical. The spring-loaded check mechanism in Valstop and Eurostop valves provides instantaneous shutoff to prevent reverse flow, even in systems with varying pressure levels. This feature is especially valuable in multi-zone heating or chilled water circuits, where pressure conditions change frequently.

• Plumbing and Potable Water Applications

Thanks to the lead-free brass construction and NSF-certified sealing materials, these valves

are safe for potable water systems. The use of NBR or FKM gaskets ensures long-lasting

resistance to water, glycol, and other HVAC-compatible fluids. Whether you're installing in a

residential water supply line or a commercial booster pump system, these valves maintain

integrity under pressure.

• Compact Design and Easy Installation

The compact body design allows for easy integration into tight mechanical spaces, including pump discharge lines, manifold assemblies, and vertical risers. Whether you’re working on a new installation or a retrofit, Valstop and Eurostop simplify installation thanks to their bidirectional sealing capability and universal mounting position.

Why Choose Enolgas USA for Brass Valves and Actuated Valve Solutions?

With over 60 years of Italian engineering excellence and U.S.-based service and logistics,

Enolgas USA is a trusted partner for:

• Brass ball valves, zone valves, and check valves

• Electric and pneumatic actuators for automation

• Customized valve solutions for OEMs and industrial clients

• Fast shipping from our U.S. warehouse

Whether you’re a plumbing contractor, mechanical engineer, or HVAC system designer,

you’ll appreciate the attention to detail, flow performance, and durability of our valve

technology.

Technical Specifications at a Glance

Technical Specifications at a Glance: Valstop / Eurostop Series

Get in Touch

Looking for a reliable brass check valve supplier in the U.S? Contact Enolgas USA today at sales@enolgasusa.com to learn more about our Valstop and Eurostop series. We offer technical support, product samples, and competitive pricing for bulk orders.