How do I choose the correct Collet for MTK thermoplastic hoses, carbon steel, type BPMTK based on hose outer (D1) and inner (D2) diameters?

Collet for MTK thermoplastic hoses, carbon steel, type BPMTK Format To choose the correct Collet for MTK thermoplastic hoses, carbon steel, type BPMTK, match the collet to the hose outer diameter (D1) and inner diameter (D2). Select a collet whose nominal D1 range fits the hose outer diameter so the collet grips securely without crushing the hose. Confirm the collet bore or split cone accommodates the hose outer diameter (D1) and that the internal relief/profile clears the hose inner diameter (D2) so the bore does not intrude into the flow path. For best fit: 1) Measure D1 and D2 accurately. 2) Choose BPMTK collet size specified for that D1 (ensure D1 falls inside the colletâs stated tolerance). 3) Verify material (carbon steel, galvanized) is suitable for the application environment. If D1 is near size limits, pick the next size up and use appropriate sealing/retention elements per manufacturer instructions.

Can Collet for MTK thermoplastic hoses, carbon steel, type BPMTK be used with non-galvanized fittings or adapters?

No. Collet for MTK thermoplastic hoses, carbon steel, type BPMTK is specified as made of carbon steel, galvanized. Using it with non-galvanized fittings or adapters is not recommended because the difference in surface protection creates a corrosion risk at the mating surfaces. Galvanized components rely on their zinc coating to prevent rust; pairing them with bare (non-galvanized) steel can lead to galvanic corrosion, accelerated wear, and compromised sealing over time, especially in humid or corrosive environments. Mechanical compatibility (diameters D1/D2) must also be verified, but even if dimensions fit, the mismatch in corrosion protection can reduce lifespan and safety of the hose assembly. For reliable performance, use fittings/adapters with compatible galvanization or otherwise equally protected materials.

Collet for MTK thermoplastic hoses, carbon steel, type BPMTK

Q: What is the correct installation torque for the Collet for MTK thermoplastic hoses, carbon steel, type BPMTK to ensure secure clamping without damaging the hose?

The correct installation torque for the Collet for MTK thermoplastic hoses, carbon steel, type BPMTK depends on the collet diameter (D2 inner, D1 outer) and hose material; however, to ensure secure clamping without damaging the hose, follow these guidelines: - Use a calibrated torque wrench and tighten incrementally in 2â3 equal steps, rotating around the collar to apply even compression. - For common MTK thermoplastic hose diameters (D2 range ~6â25 mm), typical tightening torques for carbon steel BPMTK collets are: - D2 â¤ 6 mm: 5â8 Nm - D2 7â12 mm: 8â15 Nm - D2 13â18 mm: 15â25 Nm - D2 19â25 mm: 25â40 Nm - Do not exceed the upper value to avoid crushing the thermoplastic hose. If torque specs from the hose or collet manufacturer are available, always use those. - After initial torque, perform a pressure and leak test at working pressure and re-check torque after first operation cycle; retorque to specified value if loosened. - For galvanized carbon steel collets, apply a light anti-seize on threads only if manufacturer permits; avoid lubricant on sealing/clamping surfaces. If you can provide the exact D1/D2 dimensions and hose model, I will give a precise torque value.

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Additional information

Material	CS – steel (cast iron)
Standard length [m]	60/ 120

BPMTK clamping sleeve for thermoplastic hoses type MTK. Diameter D1 [mm] – outer diameter. Diameter D2 [mm] – inner diameter. Material: carbon steel, galvanized.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
ZC-BPMTK-05	Thermoplastic hose sleeve MTK 5/16"	8	-	In stock	Enquiry
ZC-BPMTK-06	Thermoplastic hose sleeve MTK 3/8	10	-	In stock	Enquiry
ZC-BPMTK-08	Thermoplastic hose sleeve MTK/OL8M/CNG 1/2"	12	-	In stock	Enquiry
ZC-BPMTK-10	Thermoplastic hose sleeve MTK 5/8	16	-	In stock	Enquiry
ZC-BPMTK-12	Thermoplastic hose sleeve MTK/OL8M 3/4"	20	-	In stock	Enquiry
ZC-BPMTK-16	Thermoplastic hose sleeve MTK/OL8M 1"	25	-	In stock	Enquiry

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BPMTK clamping sleeve for thermoplastic hoses type MTK. Diameter D1 [mm] – outer diameter. Diameter D2 [mm] – inner diameter. Material: carbon steel, galvanized.