The Self-Locking Storz Coupling is a symmetrical quick-connect fitting with an automatic mechanical lock to prevent disengagement from vibration or pressure surges. Gravity-cast and T6 heat-treated to DIN standards, It enables high-pressure fluid transfer across firefighting, industrial water, and chemical logistics systems.
Technical Specifications
|
Parameter |
Specification |
|
Standard Compliance |
DIN 14301 / DIN 14302 / DIN 14303 (Interchangeable with standard DIN Storz) |
|
Nominal Sizes (DN) |
DN50 (2"), DN65 (2.5"), DN80 (3"), DN100 (4"), DN125 (5"), DN150 (6") |
|
Working Pressure |
16 Bar (230 PSI) |
|
Burst Pressure |
≥ 48 Bar (696 PSI) |
|
Seal Materials |
NBR (Standard: Water & Oil); EPDM (Acid/Alkali resistant); Viton (High Temp/Chemical) |
|
Temperature Range |
NBR: -20°C to +80°C |
|
Machining Tolerance |
Lug Distance Lug-to-Lug (KA): ±0.1 mm (CNC Precision Machined) |
Applications
Firefighting & Emergency Response
Connection to high-pressure fire pumps, hydrants, and emergency water supply vehicles.
Industrial Water Delivery
Construction site drainage, mining fluid transport, and municipal emergency water diversion.
Chemical & Environmental Engineering
Safe connection for temporary chemical transfer pipelines and wastewater treatment plants.
Agricultural Irrigation
High-volume mobile irrigation and pump station connection lines.
OEM Services
Custom Branding
Laser marking for customer logos, part numbers, working pressures, and manufacturing batch codes.
Custom Design
CAD/CAM technical support to modify thread types (NPT, BSPP, BSPT) or tail sizes based on hose specifications.
Sample Support
Free samples are available for qualified industrial distributors and B2B buyers upon evaluation.
Quality Control & Testing Standards
To comply with international quality requirements, every production batch undergoes strict inspection before shipment:
Raw Material Inspection: Optical Emission Spectrometry (OES) verifies alloy chemical composition prior to casting.
Leakage Testing: 100% of finished couplings undergo factory pneumatic leak testing at 6 bar.
Hydrostatic Pressure Testing: Batch sampling at 1.5x working pressure (24 bar) for 5 minutes to verify structural integrity.
Traceability & Certification: EN 10204 3.1 Material Test Certificates (MTC) and Hydrostatic Inspection Reports are available with all shipments.
Manufacturing Capabilities
12,000 m² factory equipped with automatic gravity casting lines and CNC machining centers.
50,000 sets with dedicated safety-stock inventory for standard sizes (DN50 to DN100).
15–25 days for bulk container orders; standard samples ship in 3 business days.
FAQ
Q: Can your self-locking couplings pair directly with our standard DIN Storz inventory?
A: Yes. Lug spacing and claw dimensions match standard DIN profiles, enabling direct connection with existing non-locking Storz fittings.
Q: Are technical drawings and 3D step files provided for engineering evaluation?
A: Yes. CAD drawings and 3D models are available upon request to assist with your system design and validation.
Q: How do you prevent thread galling or surface wear during repeated connections?
A: Anodized surface treatment improves wear resistance, reducing friction and preventing galling during high-frequency connections.
Q: Can we request custom lug distances (KA) or non-standard thread connections?
A: Yes. CNC machining lines allow customization of lug spacing, hose tails, or special threads to match specific regional requirements.
Q: What certifications or inspection documents are provided with export shipments?
A: Shipments include EN 10204 3.1 Material Test Certificates, pressure test reports, and factory dimensional inspection records.
Q: What is the Minimum Order Quantity (MOQ) for custom OEM orders?
A: Standard items require an MOQ of 50 pieces per size, while custom OEM branding or packaging starts at 200 pieces.
Q: How are couplings packaged to prevent damage during overseas container transit?
A: Units are individually capped, boxed in 5-ply cartons, and wrapped on ISPM-15 compliant heat-treated pallets.
Q: Are spare locking springs and replacement seals available for purchase separately?
A: Yes. We supply replacement NBR, EPDM, or Viton gaskets, along with stainless steel spring lock repair kits.
Q: What quality steps ensure consistent locking tension across different production batches?
A: Spring tension meters test each batch to verify uniform locking force and prevent premature latch failure.
Q: Can we request third-party factory audits or pre-shipment inspections?
A: Yes. Third-party inspections by independent agencies such as SGS, TÜV, or BV are supported before loading.
