Process Valves, Pumps & Compression
Valve Disc Springs and Flange Bolting Washers
Disc springs for valve actuators, flange-bolt preload and high-temperature service, with published outside diameters from 6 to 534 mm and material-specific service to 700 degrees C.
Published dimensional and material envelope
Reference fields for quotation comparison. Final values must be confirmed in the signed manufacturer datasheet.
| Selection field | Reference value | Reference value | Reference value | RFQ note |
|---|---|---|---|---|
| General disc spring size | — | 6-500 mm outside diameter | 0.2-35 mm thickness | Use the drawing and load-deflection requirement |
| Valve disc spring size | — | 16-534 mm outside diameter | 0.4-10 mm thickness | Confirm seat, guide and stack space |
| Material temperature envelope | -200 to 700 degrees C | — | — | Material-specific, not one universal grade |
| Representative alloys | — | 51CrV4, 17-7PH, Inconel X750/X718, Nimonic 90 | — | Select for stress, relaxation and corrosion |
Disc springs in valve and flange service
Disc springs store high axial force in a short movement and can be stacked to change load and deflection. In oil and gas equipment they are used in valve mechanisms, flange-bolt preload, pipe supports and other compact assemblies where ordinary coil springs may need too much axial space. Public technical ranges reviewed for this page cover general disc springs and valve-specific series rather than one universal stock item.
Size and material selection
General disc-spring references list 6-500 mm outside diameter and 0.2-35 mm thickness. A valve-focused range lists 16-534 mm outside diameter and 0.4-10 mm thickness. Material options include 51CrV4 spring steel, stainless grades, 17-7PH, Inconel X750 and X718, and Nimonic 90; availability and heat treatment must be confirmed for the selected geometry.
Temperature, corrosion and stacking
Material-specific references extend from cryogenic conditions around -200 degrees C to high-temperature applications near 700 degrees C. That full envelope cannot be assigned to one alloy without checking relaxation, corrosion and cyclic life. The RFQ should include outside and inside diameters, thickness, free height, required force at defined deflection, cycle count, temperature, medium and stack arrangement.
RFQ checklist
Attach the spring drawing, load-deflection curve or mating assembly dimensions. Ask for material certification, heat treatment, coating, dimensional tolerance and load testing at the specified deflection points. DIN EN 16983 and DIN EN 16984 may be used as design or manufacturing references where applicable, but the signed drawing and approved material remain the purchasing basis.
Technical reference trail
These public references support the equipment family and selection context. They do not imply dealership, authorization or a guaranteed order specification.
Frequently Asked Questions
How do series and parallel disc-spring stacks differ?
Series stacking increases deflection, while parallel stacking increases force. Mixed stacks require a calculated load-deflection curve and suitable guides.
Can one alloy cover -200 to 700 degrees C?
No. The broad range represents different materials. Select the alloy by temperature, corrosion, stress relaxation and fatigue requirements.
What drawing data is needed for a custom disc spring?
Provide outside and inside diameter, thickness, free height, force at specified deflection, cycle life, material, finish and stack arrangement.
Technical and RFQ References
Check common units, standards and purchasing terminology, then build a structured request for this equipment.
Submit RFQ for Valve Disc Springs and Flange Bolting Washers
Send product, quantity, specification and destination details so the requirements can be reviewed with potential suppliers.
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