Valve Disc Springs
Disc Springs are used in a wide variety of Valve applications. The largest disc spring we have manufacture is 450mm wide and 18mm thick, used in pressure release valves for power stations.
Application
Conical Disc Springs have proven popular with Engineers in various Valve types and applications because of their unique and special properties:
- Predicable and Quantifiable Load Characteristic Curve
- Ability to achieve a very high load to compression ratio
- Exceptional fatigue qualities and excellent operational life
When asked for their latest maintenance notes on this particular stack, we were handed documentation from 1992 - impressive operational life, especially with no maintenance in 25 years!!!
Types of Valves
Disc Springs are used in many different types of valve, we have supplied solutions for:
- Pressure Release Valves
- Ball Valves
- Butterfly Valves
- Globe Valves
Typical Characteristics
Because of the extremely varied application of disc springs for Valves the general characteristics we provide here are not cast in stone, particularly for the larger Pressure Relief Valves
- The ratio of De to Di typically ranges from 1.1 t0 1.4 - This ratio dictates static setting stress levels for σ1, however
- Because the ratio of De to t is typically much greater than 50, these disc springs have excellent fatigue life.
- The ratio of h0 to t ranges from 0.4 to 1.4 depending on whether a progressive, linear or digressive curve is needed
- More often than not, Valve Disc Springs are made from one of the Nickel / Chromium alloys (X7CrNiAl 17-7 / 1.4568 / AISI 631 or INCONEL x-750 or AISI 301) to deal with corrosive and high temperature environments
These INCONEL Disc Springs take 26 hours to Precipitation harden to achieve Rockwell C of 42.
Available Sizes
If you do not see the size of disc spring you require in our listing of Disc Springs used in Valve applications., please contact us. We can easily provide you with bespoke and non standard solutions.