Engineering Excellence
High Temperature Gas Springs / Thermodynamic Elements
Industry Leaders
Why choose Nutberry Gas Springs
Engineered for reliability, efficiency, and high-temperature performance, Nutberry Gas Springs outperform traditional alternatives. Here’s why industry leaders choose us:
COST EFFECTIVE
Nutberry Gas Springs are guaranteed for a minimum of 500 cycles at 500 degrees Celsius.
HIGHER SAFE OPERATING TEMPERATURE
Gas Springs operate at temperatures above those possible with coiled springs, keeping gate valve mechanisms safer should there be a temporary shortage of cooling medium. Latest designs incorporate a fail safe mode.
GUARANTEED RELIABILITY
Nutberry Gas Springs are the only gas springs with a GUARANTEE.
NO COOLING MEDIUM REQUIRED
Once the operating temperatures have been established and the correct Nutberry Gas Springs installed, it is possible to operate the gate valve without the introduction of a cooling medium. Thus further reducing operating costs.
INCREASED REFRACTORY PLATE LIFE
Users of Nutberry Gas Springs have achieved a higher plate life by controlling the force applied to them and giving them a more evenly distributed force.
REDUCED OXYGEN/NITROGEN PICK UP
Being able to operate without a cooling medium assists the production of clean steel by providing an oxygen and nitrogen free atmosphere in the area of the refractory plate.
FREE TRIAL SET
Nutberry will design a gas spring to replace existing compression/disc springs, without modification to mechanism. Once approved, Nutberry will supply a free set of gas springs for you to test and validate.
Engineering Excellence
Nutberry gas springs / thermodynamic elements have an unparalleled reputation for reliability and are the most technically advanced product available for many steel plants throughout the World.
manufacturing and designing gas springs
Supplying Industry Leaders since 1978
Nutberry has been manufacturing and designing Gas Springs for Flogates, Vesuvius, Ferroser, IFGL, Knoellinger, Monocon, Deguisa and other users of slide gate mechanisms since 1978.
Nutberry designs gas springs to suit customer requirements, working with mechanism manufacturers and agents to create an optimum gas spring design. This provides an alternative solution to high-temperature challenges. Once the design has been approved, Nutberry will supply a set of gas springs free of charge for the customer to test and validate.
Temperatures >
Gas Springs
Standard Hybrid Balanced Element
Temperatures >
Gas Springs
Standard Hybrid Balanced Element
Advanced Technology
Nutberry uses advanced technology with CNC machining and automated computer-controlled bellows forming machines. There are many advantages to using Nutberry gas springs over more traditional methods of coil or disc springs, which can relax at elevated temperatures.
Unrivalled Performance & Reliability
The superior quality is such that although they are designed and guaranteed to operate at temperatures up to 500ºC, in many cases, they have been used at temperatures in excess of this and continue to be used with excellent results. All Nutberry gas springs are leak-tested with a mass spectrometer, ensuring that no leaks are present.
balanced spring
Higher Safe Operating Temperature
FT Thermodynamic Elements
Thermodynamic Elements in Flocon Mechanism at Elevated Temperatures
Spring Checkers
Nutberry manufacture spring-checkers to accurately check the force of the gas springs. These are portable units which can be kept on site to allow customers to record the gas spring forces during operations.
Nutberry Hybrid & Balanced Springs
Nutberry has also developed Hybrid gas springs and Balanced Gas springs that produce a flatter force/temperature gradient, with both designs having a back-up force for added safety.
Nutberry Hybrid Spring
Hybrid Gas Spring with Internal Inconel Compression Spring
By reducing the initial amount of pressure injected into the gas spring, at ambient, the force/temperature gradient would be considerably flatter. To make up the remaining force required, an internal spring is located inside the ram of the gas spring.
As the temperature increases, the gas pressure inside the hybrid unit is less than a standard gas spring where the total force is made up of gas alone. Depending on the ratio between gas and the coil spring, the force/temperature curve can be manipulated to provide the desired shape.
By having a secondary spring inside the unit also addresses the problem of immediate and complete failure. Once the gas has been expelled (after bellows failure), the force from the coil spring remains, providing a limited amount of load to the plates. Similarly, once the coil spring relaxes the force from the gas provides a substitute load to the plates.
High Temperatures
Nutberry Balanced Spring
Two chamber Balanced Gas Spring for flatter force/temperature curve & fail safe design
The balanced spring has been designed to operate at temperatures up to 600C and provide a narrow flat force/temperature curve tolerance. This is achieved by a mechanism to stabilize the effect of the increased pressure/force at operating temperatures and therefore generate a relatively constant force throughout the temperature range.
The Balanced Spring works by the introduction of a second chamber whereby an opposing force is generated at elevated temperatures balancing the force generated by the main chamber. The second chamber also provides a failsafe mechanism, as when the first bellows fails, the second bellows maintains the gas within, ensuring force is still applied by the spring.
- No relaxing/creep of Inconel spring at temperatures above 500C.
- No cooling required.
- Fail Safe - once outer bellows fails, inside bellows maintains force at operational temperatures.
- Force can be controlled through temperature range by adjusting opposing force in second chamber.
- Lower cost than Inconel Compression Spring.
