Valves
Valves
Unique Welding & Fabricating is a Custom Manufacturer of Hose Reels, Tank Manifold Systems and Valves, we aim to deliver real world solutions to the industry we serve through dedication to innovation, quality and sustainability
Unique Welding & Fabricating Valves
Ensuring safety and efficiency is paramount, especially when it comes to emergency situations. Our Pneumatic Emergency Valves & Rear Head Valves are designed precisely for this purpose. They offer rapid response times, reliable operation, and robust construction to withstand even the most demanding conditions.
Here are some key benefits of our valves:
Swift Response: In critical situations, every second counts. Our valves ensure an immediate response to emergencies, minimizing downtime and potential hazards.
Reliability: Built with precision engineering and high-quality materials, our valves are highly reliable, reducing the risk of malfunctions or failures when you need them the most.
Ease of Installation and Maintenance: We understand the importance of efficiency in your operations. Our valves are designed for easy installation and minimal maintenance, saving you both time and resources.
Customization: Every industry has unique requirements. We offer customizable solutions to ensure that our valves seamlessly integrate into your existing systems, maximizing their effectiveness.
Pneumatic Emergency Valves
3", 4" & 6" Pneumatic Emergency valves
Avoid production slowdowns, operator injury and expensive environmental cleanups by effectively stopping fuel and chemical leaks when accident occurs.
Suitable for a variety of applications including water, oils, and carbon fuel derivatives,
High Flow, lower pressure drop,
High Quality, all parts tested and related D.O.T. 406 Standards
Notes:
3″ & 4″ Emergency Valves with Victaulic Outlets
6″ Emergency Valves with Flanged Outlet
3″, 4″ & 6″ Pneumatic Emergency Valves
Engineered to Stop Leaks Fast—Protect People, Equipment & the Environment
In critical moments, every second counts. Our Pneumatic Emergency Valves—available in 3″, 4″, and 6″ sizes—are designed to instantly stop the flow of hazardous or pressurized liquids during accidental disconnection, collision, or rollover events.
Built to meet D.O.T. 406 safety standards, these valves provide a cost-effective, high-durability solution that helps operators avoid:
Costly environmental spills
Workplace injuries
Equipment damage
Costly downtime and lost product
Why Choose Our Pneumatic Emergency Valves?
✅ Automatic Leak-Proof Shutoff in Emergencies
A built-in cut-off groove triggers a fail-safe seal, instantly halting fluid flow in the event of catastrophic failure or tanker breach. This technology prevents product loss and contains the hazard before it spreads.
✅ High Flow, Low Pressure Drop
Engineered to maintain maximum discharge efficiency during normal operations—while still offering instant shutoff capability during emergencies. Get optimal performance without compromising safety.
✅ Tested to Perform
Every valve is individually pressure tested and manufactured to meet or exceed D.O.T. 406 standards, ensuring compliance and peace of mind on the road or at the terminal.
✅ Corrosion-Resistant Materials
Built with high-grade stainless steel or treated aluminum, these valves resist corrosion and wear—even when handling aggressive fuels or chemicals.
✅ Easy Installation & Low Maintenance
Designed with straightforward mounting, easy-access components, and low-maintenance operation, these emergency valves reduce labor time in both initial setup and routine service.
✅ Multiple Sizes & Configurations Available
Available in 3″, 4″, and 6″ models to fit a wide variety of tanker designs and liquid transfer setups. View full specs and sizing options [on our product page or catalog].
Ideal for a Wide Range of Fluids
Water
Crude & Refined Oils
Diesel, Gasoline, and Jet Fuel
Ethanol and Biofuels
Chemical Slurries & Solvents
Carbon Fuel Derivatives
Whether you operate in fuel transport, chemical hauling, municipal services, or industrial liquid transfer, our pneumatic emergency valves are your first line of defense against the unexpected.
Field-Ready Features
Pneumatic Activation for hands-free or remote control during emergencies
D.O.T. 406 Compliant for hazardous material tank applications
Cut-Off Groove creates an automatic barrier if valve body is damaged or sheared
Durable Sealing Surfaces for reliable leak prevention
Compact Footprint suitable for limited mounting space
Customizable to Tank Design – bolt patterns, gaskets, and flanges available on request
Protect Your Operation — Before the Accident Happens
Spills, fires, and operator injuries often begin with one small failure. Don’t let that weak link be your emergency valve. Our pneumatic emergency valves are tried, tested, and trusted by fleet operators, OEMs, and bulk transport professionals across the industry.
From highway haulers to chemical plants, these valves are designed to perform when it matters most—at the moment of crisis.
6" Rear Head Valves
Short & Long Style
6″ Hot Head Aluminum Product valve is a hot or cold viscous material rugged valve, generally used for hot asphalt or any heavy liquids, designed for installation on the rear head of tanker and to provide high discharge rates for such products. This enables a tank to be unloaded much faster than with conventional valves.
A replaceable Oilite Gasket is provided for ease in repairing should damage occur from dirt or other foreign material.
A heavy mounting flange is provided to insure a flat gasket surface.
Note: Optional sump available at extra cost.
Engineered for Performance in the Most Demanding Conditions
When you’re handling high-temperature or high-viscosity materials like hot asphalt, crude oil, molasses, or heavy residuals, conventional valves just won’t cut it. That’s where the 6″ Hot Head Aluminum Product Valve comes in—a purpose-built, rugged valve designed to deliver superior flow performance and withstand the toughest operating environments.
Built to Move More, Faster
Speed matters—especially when unloading tanker trucks at job sites or distribution centers. This 6-inch rear-head mounted valve is specifically engineered for high-volume discharge, significantly reducing offloading time compared to standard 4-inch or butterfly valves. That means less time at the pump, faster job turnover, and improved operational efficiency.
Key Features
✅ High-Flow Design:
The 6″ diameter provides an unimpeded flow path for thick and sticky materials, ensuring quick discharge even under low-pressure conditions.
✅ Aluminum Construction:
Built with high-strength aluminum alloy, this valve offers the ideal balance of durability and weight reduction—essential for mobile applications like tanker trailers.
✅ Hot Head Configuration:
Designed for hot materials up to 400°F (204°C), the valve body and internal components resist warping and degradation, ensuring long-term performance with repeated exposure to high heat.
✅ Corrosion and Abrasion Resistant:
Rugged enough for asphalt, tar, and petroleum-based products, yet reliable in handling corrosive or abrasive sludges and slurries.
✅ Rear Head Installation:
Specifically configured for rear head placement on asphalt tankers and hot product trailers, where discharge efficiency and operator safety are top priorities.
✅ Fast Cleanout & Maintenance:
Streamlined design for quick maintenance access, minimizing downtime between loads.
Ideal Applications
Hot Asphalt & Bitumen Transport
Crude Oil Hauling
Roofing Tar & Heavy Petroleum Product Transfer
Paving Equipment Supply
Viscous Food-Grade Liquids (e.g., molasses, syrup, glycerin)
Whether you’re a bulk transport operator, asphalt contractor, or industrial liquid hauler, this valve gives you the performance edge your operation demands.
Why Choose Our Hot Head Valve?
Because in your line of work, every minute counts and every load matters. You need equipment that won’t let you down under pressure—or heat. Our 6″ Hot Head Aluminum Product Valve is purpose-built for your industry, backed by decades of engineering excellence, and field-tested to perform in the most punishing environments.
Technical Specifications
Valve Size: 6” (150mm)
Material: High-grade aluminum alloy
Temperature Rating: Up to 400°F (204°C)
Mounting Style: Rear Head Flanged
Seal Options: High-temp elastomers compatible with asphalt and petroleum-based products
Weight: Optimized for mobile use
Flow Rate: Up to 30% higher than conventional 4” valves
In the realm of bitumen processing and handling, 6" rear head valves are critical components used to manage the flow and control of this viscous substance. Bitumen, a byproduct of petroleum refining, is commonly used in road construction, waterproofing, and various industrial applications due to its adhesive and waterproofing properties. The use of 6" rear head valves in bitumen systems ensures efficient management of the material under challenging conditions. 6" rear head valves are integral to the effective handling and processing of bitumen. Their high-temperature tolerance, corrosion resistance, and precise flow control make them indispensable in bitumen storage, transfer, processing, and application. By incorporating these valves into bitumen systems, industries can achieve enhanced durability, efficiency, and safety in their operations.
Taking On The Industry's Toughest Reel Challenge!
We produce a broad range of custom products, and are a leader in this market, with industrial quality designed and engineered hose and cable reels, petroleum products and manifolds…