How does the FLEX-GEAR compensation spring band, Series 847, stainless steel maintain a leak-proof seal during thermal expansion and contraction?

The FLEX-GEAR compensation spring band, Series 847, stainless steel maintains a leak-proof seal during thermal expansion and contraction by combining a worm-drive clamp with an integrated disc-spring assembly that automatically compensates dimensional changes. Eight stacked disc (washer) springs beneath the screw head provide a constant axial preload on the band: as the hose shrinks (cold flow) or expands with temperature swings, the spring stack flexes to absorb those changes while keeping the band tensioned. This continuous tension preserves uniform radial pressure around the entire circumference, preventing gaps and leaks. The spring mechanism permits automatic diameter adjustment without loosening the clamp; proper installation is signalled when the screw end protrudes past the lock housing and the disc springs are flattened. Additional features . a stainless steel 410 screw/lock, 300-series stainless band, and an internal insert protecting the hose surface . ensure durable, damage-free sealing under repeated thermal cycling. Recommended tightening torque is 5.6 Nm (max 9.6 Nm) for correct spring function and seal integrity.

What indicates correct installation of the FLEX-GEAR compensation spring band, Series 847, stainless steel?

Correct installation of the FLEX-GEAR compensation spring band, Series 847, stainless steel, is indicated by: the screw end protruding beyond the housing of the lock and the disc (washer) springs being visibly flattened. The clamp must be tightened to the recommended torque (nominal 5.6 Nm, max 9.6 Nm). When properly fitted, the spring stack compensates dimensional changes while maintaining uniform grip and sealing around the hose; the internal insert protects the hose surface from damage. Screw/lock: stainless steel 410; band: stainless steel 300; band width: 14.3 mm.

Can the FLEX-GEAR compensation spring band, Series 847, stainless steel prevent hose damage during over-tightening?

Yes. The FLEX-GEAR compensation spring band, Series 847, stainless steel is specifically designed to prevent hose damage during overâtightening while maintaining a secure seal. Key features that achieve this: - Spring compensation: A set of 8 disc (washer) springs under the screw head automatically absorbs dimensional changes and allows limited axial movement, so the clamp maintains grip without transferring excessive, constant compressive force to the hose. - Controlled torque: Recommended installation torque is 5.6 Nm (max 9.6 Nm); staying within this range prevents excessive clamp force that could crush or cut the hose. - Visual installation cue: Proper clamping is indicated by the screw end protruding beyond the lock housing and flattened disc springs, helping installers avoid overâtorquing. - Hose protection insert: The internal insert shields the hose surface from the band edge and screw pressure, reducing risk of abrasion or point damage. - Materials and design: Stainless steel band and spring mechanism preserve consistent clamping behavior under temperature changes, avoiding repeated overâtightening cycles. Taken together, the spring mechanism, torque guidance, and protective insert significantly reduce the likelihood of hose damage from overâtightening, especially in applications with temperature variation. However, correct installation (adhering to torque limits and ensuring the insert is used) is necessary for these protective benefits to be effective.

FLEX-GEAR band clamp with compensation spring, series 847, stainless steel

All products, Clamps for mounting ends/

Additional information

Material	SS – stainless steel

Band clamp with a worm-drive lock, equipped with a spring to compensate for dimensional changes in the connection (hose shrinkage due to cold flow of the material or due to large temperature changes). The spring is a set of 8 disc (Belleville) springs – washers under the screw head. This maintains the clamp’s grip and sealing around the entire circumference of the hose, preventing leakage from the installation. The clamp’s spring mechanism automatically increases or decreases its diameter while maintaining the clamp’s grip. Particularly recommended in the case of large temperature changes. Correct clamping is indicated by the screw end protruding beyond the lock housing and by the flattened disc springs. The clamp’s inner insert protects the hose surface from damage. Installation tightening torque 5.6 Nm (max. 9.6 Nm). Screw/lock material: stainless steel 410. Band material: stainless steel 300. Band width: 14.3 mm (9/16″).

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
AB-847010	Clamp FLEX-GEAR 14÷27 mm, SS	-	-	In stock	Enquiry
AB-847012	Clamp FLEX-GEAR 16÷32 mm, SS	-	-	In stock	Enquiry
AB-847016	Clamp FLEX-GEAR 21÷38 mm, SS	-	-	In stock	Enquiry
AB-847020	Clamp FLEX-GEAR 20÷44 mm, SS	-	-	In stock	Enquiry
AB-847024	Clamp FLEX-GEAR 27÷51 mm, SS	-	-	In stock	Enquiry
AB-847028	Clamp FLEX-GEAR 33÷57 mm, SS	-	-	In stock	Enquiry
AB-847032	Clamp FLEX-GEAR 40÷63 mm, SS	-	-	In stock	Enquiry
AB-847036	Clamp FLEX-GEAR 46÷70 mm, SS	-	-	In stock	Enquiry
AB-847040	Clamp FLEX-GEAR 52÷76 mm, SS	-	-	In stock	Enquiry
AB-847044	Clamp FLEX-GEAR 59÷82 mm, SS	-	-	In stock	Enquiry
AB-847048	Clamp FLEX-GEAR 65÷89 mm, SS	-	-	In stock	Enquiry

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Band clamp with a worm-drive lock, equipped with a spring to compensate for dimensional changes in the connection (hose shrinkage due to cold flow of the material or due to large temperature changes). The spring is a set of 8 disc (Belleville) springs – washers under the screw head. This maintains the clamp’s grip and sealing around the entire circumference of the hose, preventing leakage from the installation. The clamp’s spring mechanism automatically increases or decreases its diameter while maintaining the clamp’s grip. Particularly recommended in the case of large temperature changes. Correct clamping is indicated by the screw end protruding beyond the lock housing and by the flattened disc springs. The clamp’s inner insert protects the hose surface from damage. Installation tightening torque 5.6 Nm (max. 9.6 Nm). Screw/lock material: stainless steel 410. Band material: stainless steel 300. Band width: 14.3 mm (9/16″).