OPD, Service, Fill, Safety Relief Valves & Float Gauges
OPD Valves (Overfill Prevention Devices)
OPD valves are required on most portable propane cylinders (typically 4–40 lbs) and are designed to prevent overfilling. Overfilled tanks can create dangerous pressure conditions, especially when temperatures rise.
Key Benefits of OPD Valves:
- Automatically stop filling at approximately 80% capacity
- Reduce the risk of pressure buildup and venting
- Comply with CSA B149.2, TSSA, DOT and NFPA safety regulations
- Easily identified by the triangular handwheel
OPD valves are a critical safety feature for grill cylinders, forklift tanks, and other portable propane applications.
Service Valves
The service valve controls the flow of propane from the tank to downstream appliances or regulators. It is one of the most frequently operated valves on any propane system.
Common Features:
- Manual shutoff for safe system isolation
- Designed for vapor or liquid withdrawal, depending on application
- Compatible with various outlet connections and regulators
High-quality service valves help ensure leak-free operation and smooth propane delivery in both residential and commercial systems.
Fill Valves
Fill valves are used exclusively during the propane refilling process. They allow propane to enter the tank while maintaining a sealed system when not in use.
Why Fill Valves Matter:
- Engineered to handle high-pressure propane transfer
- Designed for repeated filling cycles
- Often paired with OPD systems or bleeder valves
Reliable fill valves help protect technicians and equipment during propane transfer operations.
Safety Relief Valves
Safety relief valves are a critical pressure-management component. If internal tank pressure exceeds safe limits, the relief valve opens to vent propane and prevent tank rupture.
Important Characteristics:
- Automatically activate under excessive pressure
- Required by code on propane tanks and cylinders
- Designed for consistent, dependable performance
While relief valves are rarely noticed, they play a vital role in preventing catastrophic failures under extreme conditions.
Float Gauges (Propane Level Gauges)
Float gauges provide an accurate indication of propane levels inside the tank. They are commonly used on ASME tanks and larger storage systems.
Advantages of Float Gauges:
- Mechanical, reliable fuel level measurement
- Easy visual reference for service and delivery planning
- Reduce the risk of running out of propane unexpectedly
Float gauges are essential for both propane suppliers and end users who depend on consistent fuel availability.
Why Quality Valves Matter
Every valve on a propane tank serves a specific purpose, but all share one common requirement: reliability. Poor-quality components can lead to leaks, downtime, or safety hazards. That’s why professionals trust Fairview for propane valves engineered to meet industry standards and perform in demanding environments.
Partner with Fairview
Fairview offers a wide range of:
OPD valves
Service and fill valves
Safety relief valves
Float gauges and tank accessories
Our products are built with safety, durability, and compliance in mind—helping propane professionals deliver dependable performance in every application.
Explore our propane valve solutions and discover why Fairview is a trusted name in the propane industry.
Understanding Propane Tank Valves: Types, Functions, and Safety Features
OPD Valves
(Overfill Prevention Devices)
Service Valves
Fill Valves
Safety Relief Valves
Float Gauges
(Propane Level Gauges)
Why Quality Valves Matter
Every valve on a propane tank serves a specific purpose, but all share one common requirement: reliability. Poor-quality components can lead to leaks, downtime, or safety hazards. That’s why professionals trust Fairview for propane valves engineered to meet industry standards and perform in demanding environments.
