Is the Two-Part Cast Iron Hose Clamp with Catches, DIN 20039 B suitable for use with flat hoses marked “FL” at pressures up to 25 bar?

Yes. The Two-Part Cast Iron Hose Clamp with Catches, DIN 20039 B marked “FL” is specifically designed for flat hoses and, when installed correctly with a properly selected hose and matching fitting, provides dependable performance at working pressures up to 25 bar. Its galvanized ductile cast iron construction with yellow passivation (hexavalent chromium-free), combined with robust hooks, separate pressure pads and an integrated locking mechanism, ensures secure fastening, corrosion resistance and long-term reliability even under demanding conditions.

Can the Two-Part Cast Iron Hose Clamp with Catches, DIN 20039 B be used in corrosive environments without additional coating or protection?

Two-Part Cast Iron Hose Clamp with Catches, DIN 20039 B is manufactured from high-quality galvanized ductile cast iron with yellow passivation free from hexavalent chromium and is described as offering outstanding durability and corrosion resistance even under demanding conditions. That finish provides good general corrosion protection and makes the clamp suitable for many aggressive environments without immediate need for additional coating. However, whether it can be used without further protection depends on the specific corrosive environment (type and concentration of chemicals, temperature, exposure duration, salt spray, etc.). For highly corrosive media (strong acids/alkalis, chloride-rich marine atmospheres, constant immersion, or aggressive chemical exposure), additional protective measures (special coatings, stainless steel components, or sacrificial protection) may be advisable to ensure long-term performance. Conclusion: For typical industrial and moderately corrosive conditions the Two-Part Cast Iron Hose Clamp with Catches, DIN 20039 B should perform well without extra coating. For severe or specialized corrosive environments, consult material compatibility data and consider additional protection or alternative materials.

Two-Part Cast Iron Hose Clamp with Catches, DIN 20039 B

Additional information

Material	CS – steel (cast iron)

The two-part clamp according to DIN 20039 B is engineered for reliable and secure hose fastening, combining robust hooks with separate pressure pads to ensure a firm and stable connection. Manufactured from high-quality galvanized ductile cast iron with yellow passivation free from hexavalent chromium, it offers outstanding durability and corrosion resistance even under demanding conditions. The integrated locking mechanism guarantees a safe connection to the hose part, while versions marked with “FL” are specifically designed for flat hoses, providing maximum versatility across different applications. With correct installation, a properly selected hose, and matching fitting, the clamp ensures dependable performance at working pressures of up to 25 bar. This makes it an ideal solution for industries requiring both strength and safety, delivering long-lasting reliability and confidence in every use.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
LU-SK-29	Cast iron clamp 2-pc. with hooks for 13 mm hose, range 22÷29 mm	-	-	In stock	Enquiry
LU-SK-29-FL	Cast iron clamp 2-pc. with hooks for flat hose 19x2 mm	-	-	In stock	Enquiry
LU-SK-34	Cast iron clamp 2-pc. with hooks for 19 mm hose, range 28÷32 mm	-	-	In stock	Enquiry
LU-SK-34-FL	Cast iron clamp 2-pc. with hooks for flat hose 25x2 mm	-	-	In stock	Enquiry
LU-SK-39	Cast iron clamp 2-pc. with hooks for hose 25 mm, range 35÷42 mm	-	-	In stock	Enquiry
LU-SK-44	Cast iron clamp 2-pc. with hooks for hose 28 mm, range 42÷45 mm	-	-	In stock	Enquiry
LU-SK-51	Cast iron clamp 2-pc. with hooks for hose 35 mm, range 45÷53 mm	-	-	In stock	Enquiry
LU-SK-60	Cast iron clamp 2-pc with hose hooks 42 mm, range 55÷60 mm	-	-	In stock	Enquiry
LU-SK-73	Cast iron clamp 2-pc. with hooks for hose 50 mm, range 60÷73 mm	-	-	In stock	Enquiry
LU-SK-75	Cast iron clamp 2-pc. with hose hooks 75 mm, range 86÷102 mm	-	-	In stock	Enquiry
MU-1322	2-piece clamp with teeth 20÷29 mm (1/2")	-	-	In stock	Enquiry
MU-1323	2-piece clamp with teeth 28÷33 mm (3/4")	-	-	In stock	Enquiry
MU-1324	2-piece clamp with teeth 35÷42 mm (1")	-	-	In stock	Enquiry
MU-1325	2-piece clamp with teeth 42÷45 mm (1.7/64")	-	-	In stock	Enquiry
MU-1327	2-piece clamp with teeth 55÷60 mm (1.5/8")	-	-	In stock	Enquiry
MU-1328	2-piece clamp with teeth 60÷73 mm (2")	-	-	In stock	Enquiry
MU-1329	2-piece clamp with teeth 70÷90 mm (2.1/2")	-	-	In stock	Enquiry

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The two-part clamp according to DIN 20039 B is engineered for reliable and secure hose fastening, combining robust hooks with separate pressure pads to ensure a firm and stable connection. Manufactured from high-quality galvanized ductile cast iron with yellow passivation free from hexavalent chromium, it offers outstanding durability and corrosion resistance even under demanding conditions. The integrated locking mechanism guarantees a safe connection to the hose part, while versions marked with “FL” are specifically designed for flat hoses, providing maximum versatility across different applications. With correct installation, a properly selected hose, and matching fitting, the clamp ensures dependable performance at working pressures of up to 25 bar. This makes it an ideal solution for industries requiring both strength and safety, delivering long-lasting reliability and confidence in every use.