Introduction to Gas Gate Valves

What is a Gas Gate Valve?

A gas gate valve is designed to start or stop the flow of gas within a pipeline. It operates by lifting a gate or wedge out of the path of the gas, allowing for unobstructed flow when fully open and a tight seal when closed. This mechanism ensures minimal pressure drop and efficient isolation, making gate valves essential components in gas distribution systems.

How Does a Gas Gate Valve Work?

Gas gate valves function by the vertical movement of a gate or wedge inside the valve body. When the valve is opened, the gate lifts, permitting gas to flow freely through the passage. Closing the valve lowers the gate, effectively blocking the flow. The AVK Donkin Series 555 features a double-faced, resilient seat with an internal screw mechanism, ensuring reliable operation and a clear bore for unobstructed gas flow. This design is particularly advantageous in maintaining system efficiency and safety.

Where Are Gas Gate Valves Used?

Gas gate valves are utilised across various industries and applications, including:

• Natural Gas Distribution: Isolating the gas flow in main and service lines.
• Industrial Gas Systems: Managing gas supply in manufacturing processes.
• Commercial and Residential Buildings: Ensuring safe gas supply to appliances and heating systems.
• Renewable Gas Applications: Integrating biogas and biomethane into existing gas networks. 

Key Features & Benefits of Gas Gate Valves:

The AVK Donkin Series 555 gas gate valves offer several notable features:

• Soft Seal, Positive Shut-Off: Ensures leak-tight performance, enhancing safety.
• Full Double Block and Bleed: Incorporates two internal sealing faces and a pressure-relieving plug to remove the gas pressure within the valve body when closed and facilitate the addition of a pressure gauge during operations, to give a visual indication that there is no flow of gas past the valve gate for downstream safety.
• Clear Bore Design: Facilitates under-pressure drilling operations and minimises flow resistance.
• Maintenance-Free Operation: Constructed with durable materials requiring no lubrication and long life functionality.
• High-Integrity Coating: PUR coating allows for direct burial without additional protection, providing long-term corrosion resistance. 

Gate Valve Types & Materials

The Series 555 range includes various types to suit different applications:

• Cast Iron Gate Valves: Ideal for standard (low and medium pressure) applications with robust performance.
• Ductile Iron Gate Valves: Offer enhanced strength and flexibility, suitable for higher pressure systems.
• Steel Gate Valves: Designed for higher pressure applications, providing superior durability.

Each valve type is available with flanged connections and is coated appropriately for its intended environment, ensuring longevity and reliability. AVK also offers a extensive range of gas fittings to suit the different valves types - take a look here

Choosing the Right Gas Gate Valve

Selecting the appropriate gas gate valve involves considering several factors:

• Pressure and Temperature Ratings: Ensure the valve meets the system's operational requirements.
• Material Compatibility: Choose materials that are compatible with the type of gas, pipeline materials and environmental conditions.
• Size and Connection Type: Match the valve size and connection type to the existing pipeline specifications.
• Special Features: Consider features like fire-safe designs or hydrogen-ready variants for specific applications.

Why Choose AVK UK?

AVK UK is renowned for manufacturing high-quality valves and fittings, emphasising sustainability and innovation. Our products are designed to meet stringent industry standards, ensuring safety, reliability, and performance. With a commitment to customer satisfaction, we offer comprehensive support and a wide range of products to meet diverse application needs.

Gas Valve Training and Factory Tours

The Donkin gas gate valves are made in Chesterfield, England and we welcome visitors to come along for valve and fittings training on valves. You will also have a factory tour to see how they are made and 'get hands on'. Contact our gas expert, Jon Briafield, directly on the link below to arrange your visit. Alternatively we can come you: We can either drive our mobile roadshow van to your site, do group workshop sessions, lunch & learns or even via teams - contact Jon to arrange your training requirements.

Explore Our Gas Gate Valve Range

Discover the full range of AVK Donkin Series 555 gas gate valves by visiting our Product Finder. For expert technical advice contact Jon or, to for a quotation or submit an enquiry, contact our sales team on the contact links below:-