Is STOPFLEXÂ® protection compatible with all hydraulic hose fittings (metric, inch, flange) and how do I choose the correct OP-SFO clamp for my hose diameter?

STOPFLEXÂ® protection is compatible with hydraulic hose fittings of various types (metric, inch, flange, etc.), but must be selected to match the specific fitting type used on your system. Compatibility depends on choosing the STOPFLEXÂ® safety device designed for that fitting style. To choose the correct OP-SFO clamp: - Identify your hose outer diameter (OD). - Order the STOPFLEXÂ® clamp with the index OP-SFO-... that corresponds to that hose OD (each OP-SFO size is matched to a specific hose diameter). - Ensure the hose and clamp combination is intended for the fitting type in use (metric/inch/flange) as STOPFLEXÂ® devices are selected by fitting type. Additional checks: - Confirm the hose complies with the listed standards (EN 853, EN 854, EN 855, EN 856, SAE J517). - Make sure system working pressure does not exceed the maximum working pressure specified for the hose per those standards; proper operation of STOPFLEXÂ® is guaranteed only when pressure limits are respected.

Can STOPFLEXÂ® protection prevent hose ejection at pressures up to the maximums specified in EN and SAE standards, and which standards were used in testing?

Yes. STOPFLEXÂ® protection prevents hose ejection when hoses operate at or below the maximum working pressures specified in the standards used for testing. The system was tested on hoses per EN 853, EN 854, EN 855, EN 856 and SAE J517. Proper operation is guaranteed only if the working pressure does not exceed the limits given in those standards and the correct STOPFLEXÂ® clamp (index OP-SFO-...) is selected for the hose diameter and fitting type.

How does STOPFLEXÂ® protection behave if hose pressure briefly exceeds the standard maximum working pressure?

STOPFLEXÂ® protection is designed to hold a hose securely in the event it is pulled from the fitting, using a clamp with a rubber seal that maintains stable fastening despite pressure changes. The system has been tested on hoses operating at the maximum working pressures defined by standards EN 853, EN 854, EN 855, EN 856 and SAE J517, and proper operation is guaranteed as long as those specified working pressures are not exceeded. If hose pressure briefly exceeds the standard maximum working pressure, STOPFLEXÂ® protection may not be guaranteed to perform as tested. Short overpressure spikes can compromise hose integrity, the clamp seal, or the hose-to-fitting interface, reducing the deviceâs ability to retain the hose. Therefore, while the clamp provides robust retention under normal and fluctuating pressures within the rated limits, any exceedance beyond the standardized maximum working pressure carries increased risk of failure and falls outside the conditions under which STOPFLEXÂ® protectionâs performance is certified. For reliable safety, ensure the correct STOPFLEXÂ® clamp (index OP-SFO-...) is selected for the specific hose diameter and fitting type, and avoid operating pressures above the standardsâ specified maximums.

STOPFLEX® protection

All products, Hose Safety Systems/

Additional information

Standard length [m]	50

STOPFLEX® is a safety system that protects equipment from damage and employees from injury in the event of a hose being pulled from the fitting. A hose pulled from the fitting will be held in place by a hose. The clamp, equipped with a rubber seal, ensures stable fastening regardless of changing working pressure. The safety device is intended for hydraulic hoses and is selected for specific types of fittings (metric, inch, flange, etc.). Additionally, the appropriate STOPFLEX® clamp (index OP-SFO-…) must be purchased for the given hose diameter. The system has been tested on hoses operating under the maximum working pressure specified according to the following standards: EN 853, EN 854, EN 855, EN 856, SAE J517. Proper operation is guaranteed provided that the working pressure specified in the standards is not exceeded.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
OP-SF-DIN-14	STOPFLEX protection DIN 14.5 mm, L= 300 mm	-	-	In stock	Enquiry
OP-SF-DIN-17	STOPFLEX protection DIN 17 mm, L= 300 mm	-	-	In stock	Enquiry
OP-SF-DIN-18	STOPFLEX protection DIN 18.5 mm, L= 300 mm	-	-	In stock	Enquiry
OP-SF-DIN-20	STOPFLEX protection DIN 20.5 mm, L= 300 mm	-	-	In stock	Enquiry
OP-SF-DIN-22	STOPFLEX protection DIN 22.5 mm, L= 300 mm	-	-	In stock	Enquiry
OP-SF-DIN-24	STOPFLEX protection DIN 24.5 mm, L= 300 mm	-	-	In stock	Enquiry
OP-SF-DIN-26	STOPFLEX protection DIN 26.5 mm, L= 300 mm	-	-	In stock	Enquiry
OP-SF-DIN-30	STOPFLEX protection DIN 30.5 mm, L= 300 mm	-	-	In stock	Enquiry
OP-SF-DIN-34	STOPFLEX protection DIN 34 mm, L= 450 mm	-	-	In stock	Enquiry
OP-SF-DIN-36	STOPFLEX protection DIN 36.5 mm, L= 450 mm	-	-	In stock	Enquiry
OP-SF-DIN-42	STOPFLEX protection DIN 42.5 mm, L= 450 mm	-	-	In stock	Enquiry
OP-SF-DIN-45	STOPFLEX protection DIN 45.5 mm, L= 450 mm	-	-	In stock	Enquiry
OP-SF-DIN-49	STOPFLEX protection DIN 49 mm, L= 450 mm	-	-	In stock	Enquiry
OP-SF-DIN-52	STOPFLEX protection DIN 52.5 mm, L= 450 mm	-	-	In stock	Enquiry
OP-SF-DIN-60	STOPFLEX protection DIN 60 mm, L= 450 mm	-	-	In stock	Enquiry
OP-SF-SAE-08	STOPFLEX protection SAE 8.5 mm, L = 300 mm	-	-	In stock	Enquiry
OP-SF-SAE-10	STOPFLEX protection SAE 10.5 mm, L = 450 mm	-	-	In stock	Enquiry
OP-SF-SAE-10-300	STOPFLEX SAE 3000 3/4" 10.5 mm, L = 300 mm	-	-	In stock	Enquiry
OP-SF-SAE-12	STOPFLEX protection SAE 12.5 mm, L = 450 mm	-	-	In stock	Enquiry
OP-SF-SAE-14	STOPFLEX protection SAE 14.5 mm, L = 450 mm	-	-	In stock	Enquiry
OP-SF-SAE-16	STOPFLEX protection SAE 16.5 mm, L = 450 mm	-	-	In stock	Enquiry
OP-SF-SAE-20	STOPFLEX protection SAE 20.5 mm, L = 450 mm	-	-	In stock	Enquiry
OP-SF-SAE-25	STOPFLEX protection SAE 25 mm, L = 550 mm	-	-	In stock	Enquiry
OP-SF-SAE-32	STOPFLEX protection SAE 32 mm, L = 550 mm	-	-	In stock	Enquiry
OP-SF-V	STOPFLEX protection 13 mm, L = 450 mm	-	-	In stock	Enquiry

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STOPFLEX® is a safety system that protects equipment from damage and employees from injury in the event of a hose being pulled from the fitting. A hose pulled from the fitting will be held in place by a hose. The clamp, equipped with a rubber seal, ensures stable fastening regardless of changing working pressure. The safety device is intended for hydraulic hoses and is selected for specific types of fittings (metric, inch, flange, etc.). Additionally, the appropriate STOPFLEX® clamp (index OP-SFO-…) must be purchased for the given hose diameter. The system has been tested on hoses operating under the maximum working pressure specified according to the following standards: EN 853, EN 854, EN 855, EN 856, SAE J517. Proper operation is guaranteed provided that the working pressure specified in the standards is not exceeded.