Bristol 4″ PN16 Flanged OS&Y Gate Valve (UL LISTED)

• Model: GVO-3FFA | Brand: BRISTOL
• Size: 4” (DN100)
• Working Pressure: 300 PSI
• Test Pressure: 600 PSI
• Wedge Type: Resilient Wedge (EPDM)
• Flange Standard: PN16 / ANSI B16.1 / B16.42
• Stem: Rising Stem
• Body Material: Ductile Iron ASTM A536
• Disc Material: Ductile Iron + EPDM
• Packing: Graphite
• Coating: Fusion Bonded Epoxy (internal/external)
• Max Temperature: 80°C / 176°F
• Operation: Handwheel
• Certification: UL Listed / FM Approved
• Application: Main fire protection water isolation
• Please note, if you want to open an LC and import yourself, we will handle all arrangements for you, Ex-Works Dubai price at $188
• Prices in PKR shown by us are Including items prices & 95% Taxes/Customs & Excluding Freight Charges.

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Bristol 4″ PN16 Flanged OS&Y Gate Valve

Reliable Flow Control for Fire and Water Supply Systems

🔍 Overview – A Precision Valve for Critical Applications

The Bristol 4″ PN16 Flanged OS&Y Gate Valve is an essential component for regulating fluid flow in piping systems. Its 4-inch diameter offers excellent control, making it ideal for fire protection systems, municipal water lines, and industrial applications. Designed for high-performance use, this valve ensures smooth and efficient system operations even in demanding environments.

👁️ OS&Y Design – Visibility That Boosts Safety

One of the key features of this valve is its OS&Y (Outside Screw and Yoke) configuration. This design gives clear visual indication of whether the valve is open or closed. As a result, it reduces the chances of operator error and improves system safety. This is particularly valuable in fire safety scenarios, where quick valve status checks are essential for fast decision-making.

💪 Built for Pressure – Engineered to Last

The Bristol GVO-3FFA 4″ OS&Y Gate Valve is rated for a maximum pressure of 300 psi, making it a reliable choice for high-pressure systems. The valve’s resilient wedge ensures a tight seal while reducing the likelihood of internal leaks. This wedge design also supports extended operational life, allowing the valve to perform consistently over time with minimal maintenance.

Furthermore, the heavy-duty build ensures durability under harsh conditions. It helps prevent common problems such as corrosion or mechanical wear—critical advantages for long-term installations.

🔩 PN16 Flanged Connections – Easy and Secure Integration

This valve is equipped with PN16 flanged ends, which are widely used across industrial and municipal systems. These flanges allow for straightforward installation without the need for special adapters or transition fittings. Because of this, engineers can save time and reduce installation costs while ensuring leak-proof integration with existing pipelines.

✅ Certified for Safety – UL/FM Approved for Fire Protection Use

The Bristol 4″ Gate Valve is both UL-listed and FM-approved, which means it has passed internationally recognized standards for fire safety and performance. These certifications are especially important for fire protection systems, where every component must be tested and verified to operate reliably in emergencies.

Whether you are designing a new system or upgrading an existing one, using certified components like this gate valve ensures code compliance and peace of mind.

🏭 Applications – Versatility Across Sectors

Thanks to its robust construction and versatile design, this valve is perfect for various applications, including:

• 🔥 Fire suppression systems

• 💧 Water supply pipelines

• 🏢 Industrial process control

• 🧪 Chemical handling lines

• 🏗️ Utility networks and pump stations

Its durable build, tight sealing, and visible operation status make it a dependable option wherever safe flow control is needed.

🌐 Why Choose Silver String Chemicals?

At Silver String Chemicals Group, we offer only certified, high-performance safety and flow control equipment. As Pakistan’s largest online safety product supplier, we proudly include the Bristol GVO-3FFA OS&Y Gate Valve in our extensive catalog.

What Sets Us Apart:

• ✅ Ready stock with fast nationwide delivery

• ✅ Expert consultation on system integration

• ✅ Competitive pricing and B2B support

• ✅ 100% genuine UL/FM-approved products

From Karachi to Lahore, and from Sialkot to Faisalabad—we supply industries across Pakistan with trusted solutions.

🏁 Conclusion – The Valve That Performs When It Matters

The Bristol 4″ PN16 Flanged OS&Y Gate Valve is the right choice for anyone needing safe, efficient, and durable fluid control. With its resilient wedge, 300 psi pressure rating, and OS&Y visual operation, this valve brings peace of mind to both engineers and operators.

Whether you’re responsible for maintaining a fire protection system or managing a water distribution network, this valve ensures you’ll have reliable performance, lower maintenance costs, and full compliance with international safety standards.