A Smarter Alternative to Buckling Pin Relief Valves

Buckling pin valves have long been used for overpressure protection in industrial applications. These devices rely on a calibrated metal pin that buckles when a predetermined pressure is reached, allowing the valve to open and relieve pressure. While this technology can provide reliable pressure protection, the 6820 Total Relief Valve offers a more efficient, versatile and easily resettable solution - without requiring replacement pins after activation.

The patented 6820 TRV is an ASME-certified total relief system engineered to open or close a valve at a specified set pressure. The system combines a TRV module, actuator and isolation valve, typically a durable triple-offset butterfly valve. This design provides dependable pressure control while helping facilities minimize maintenance, replacement parts and operational downtime.

6820 Buckling Pin Relief Valves Alternative

One of the most significant differences between the 6820 TRV and a traditional buckling pin valve is what happens after the system activates.

When a buckling pin valve opens, the buckled pin must be removed and replaced with the correct calibrated replacement pin before the valve can return to service. This requires personnel to access the valve, verify the replacement component and complete the reset procedure.

The 6820 TRV does not require replacement pins or rupture discs. After the pressure event has been addressed, the valve can be closed and reset in seconds with the push of a button. A remote reclosing option is also available, allowing operators to restore the valve without immediately accessing equipment installed in elevated, confined or difficult-to-reach locations.

This resettable design can provide several operational advantages:

No replacement buckling pins to purchase or inventory

No risk of installing an incorrect replacement pin

Less labor required following a pressure event

Reduced equipment downtime

Remote reclosing capability

Faster return to normal operation

The 6820 TRV is designed to deliver accurate activation at the desired set pressure with a tolerance of ±5%. Available set pressures range from 0.5 psi to 1,480 psi, making the system suitable for a wide variety of industrial pressure-control applications.

Buckling pin valves also use calibrated pressure-response technology, but their operation depends on a sacrificial pin that must deform before the valve opens. The 6820 TRV delivers precise pressure activation without relying on a component that must be discarded and replaced after every event.

Lower Maintenance and Reduced Lifecycle Costs

The initial purchase price is only one part of the total cost of a pressure relief system. Replacement components, labor, inventory requirements, process interruptions and downtime can substantially increase lifecycle costs.

Because the 6820 TRV can be reset without installing replacement pins, it helps eliminate many of these recurring expenses. Its durable valve design, quick reset capability and remote operation options can reduce maintenance demands while improving equipment availability.

Depending on the application, the 6820 TRV may also offer a price and lead-time advantage over comparable buckling pin and shear pin valve systems.

Upgrade From Buckling Pin Technology

Buckling pin valves can provide dependable overpressure protection, but their reliance on replaceable pins introduces additional maintenance, inventory and downtime. The 6820 TRV offers a modern approach with accurate pressure activation, back-pressure-independent operation, extreme-temperature capability and rapid resetting without replacement components.

For operations seeking to improve pressure protection while reducing maintenance and recovery time, the 6820 TRV delivers a powerful alternative to conventional buckling pin valve technology.

6820TRV Comparison

	6820 TRV	Rupture Disc	Buckling Pin	Rupture Pin
Metal Seats Standard
High Temp. and Cryogenic Temps w/ Standard Design
Class VI Sealing when Closed			*	*
Partial Stroke Option
Relieving Pressure Not Affected By Back Pressure
In-Line / Straight Through Design
Large Diameter (8″ and up)				***
Less than 1 minute of downtime needed to reset				*
All Stainless Steel Design Available			**	**
No debris sent down stream after opening		****
Minimal Pressure Loss
Part Numbers Etched on Replacement Pins / Discs	*****
ASME Certification
PED Certification
Needs no replacement Pins / Disc
Small diameter settable at Low Pressure
NOTES: * - Not Published - Optional * - Pilot Operated For Larger Sizes ** - Dependent Upon Style *** - No Replacement Items Required