DIN 3017 1 is the foundational section of the German industrial standard that specifies the requirements for the most common and widely recognized type of high-quality worm drive hose clamp. Often referred to simply as a "W2" clamp in industry parlance, it is characterized by its perforated stainless steel band and is considered the benchmark for reliability in demanding applications.
W2 Euro style constant tension clamp is one type of DIN 3017 1 clamps. The W2 German-style Offset Head Hose Clamp is a specific and high-quality variant of the internationally recognized DIN 3017 1 standard worm drive clamp. The "offset head" design is a key feature that differentiates it from standard clamps and provides distinct functional advantages, particularly in tight or hard-to-reach installation spaces.
Key Features of DIN 3017 1 Clamps
Open Housing Design:
The housing is typically made from stamped stainless steel and has an open design that exposes the worm screw. This differentiates it from the W4 type (covered in other parts of the standard), which has a fully enclosed housing for higher torque.
Despite being open, the housing is robust and designed to withstand significant tightening force.
Materials:
Band, Screw, and Housing: Manufactured from stainless steel as a standard requirement to ensure overall corrosion resistance and prevent galvanic corrosion.
Common Grades:
A2 (1.4301 / AISI 304): Standard grade for excellent general corrosion resistance.
A4 (1.4401 / AISI 316): Premium grade with enhanced resistance to chlorides and acids, mandatory for marine and chemical environments.
Performance & Testing:
DIN 3017 Part 1 mandates rigorous tests to ensure:
High Tensile Strength: The clamp must resist a minimum pulling force without failure.
Pressure Integrity: It must seal effectively without leakage at a specified proof pressure.
Vibration Resistance: The positive-lock mechanism is inherently designed to resist loosening, a critical requirement in automotive and marine applications.
Common Applications
DIN 3017 Part 1 clamps are the go-to solution for a vast range of critical applications:
Automotive: Coolant hoses, oil lines, power steering lines, and air intake systems in both standard and high-performance vehicles.
Marine: Engine cooling systems, fuel lines, bilge pump connections—especially when made from A4 (316) stainless steel.
Industrial Machinery: Hydraulic lines, pneumatic systems, and cooling circuits on manufacturing equipment.
Food and Beverage Processing: In wash-down environments when constructed from appropriate stainless steel.
