Mechanical
Couplings
High-performance universal couplings engineered for rigid, leak-proof connections in drinking water distribution. DN25 to DN1600 range, tested to PN16.
Precision in Every Detail
Full product view with component callouts and technical cross-section drawing for installation reference.
High-Performance Universal Mechanical Couplings
Truform's Mechanical Couplings deliver rigid, leak-proof connections across all major pipe materials — designed and tested for drinking water distribution systems worldwide. Cold expanded for extra strength, with flash butt welded joints and captive bolts for single-spanner installation.
⚙ Custom Engineering Available
Centre sleeve lengths are available from 200mm to 1000mm, customized to meet unique installation requirements for steel and ductile iron systems.
Why Choose Truform Couplings?
Engineered for excellence — every feature designed to reduce installation time, extend service life, and ensure safe potable water contact.
Safe for Potable Water
WRAS approved and certified under BS 6920 — fully compliant for use in drinking water distribution systems globally.
DN25 to DN1600 Range
One product family covers the full spectrum — from small residential connections to large transmission mains up to DN1600.
Up to 6° Angular Deflection
Accommodates ground movement and pipeline misalignment without loss of seal integrity — ideal for challenging terrains.
Captive Bolts
Single-spanner installation thanks to captive bolt design — dramatically reduces installation time and labour costs on site.
Flash Butt Welded Joints
Superior weld integrity through automated flash butt welding — eliminating weak points and ensuring structural consistency.
Cold Expanded Strength
Cold expansion process provides uniform radial strength, ensuring tight tolerances and leak-proof performance at up to PN16 operating pressure.
Technical Specification & Compliance
Every component selected for performance, safety, and international compliance — materials sourced from certified global suppliers.
Material Specification
| Component | Material / Origin |
|---|---|
| Body & End Rings | Ductile Iron |
| Internal/External Coating | Non-toxic Fusion Bonded Epoxy Powder (300µ) |
| Epoxy Supplier | Berger-Lacke GmbH / Berger Paints India |
| EPDM Gaskets | Prabhat Elastomers Pvt. Ltd. |
| Hardware Kit | High-Tensile Stainless Steel (SS 304 / 316) |
| Operating Pressure | Tested to 16 Bar (PN16) |
| Size Range | DN25 to DN1600 |
| Sleeve Length Range | 200mm to 1000mm (custom) |
| Max Angular Deflection | Up to 6° |
Standards & Certifications
-
ISO 9001:2015
Quality Management System — TUV SUD Certified -
WRAS Approved
BS 6920-1:2000 & 2014 — Potable Water Contact Approval -
EN 14525
WRAS Approval Nos: 240455006, 2304547, 2310556, 240655013 -
BS 6920 Gaskets
Approval Nos: 2306530, 240355050, 250555022 -
BS 1449 / ISO 898-1
Hardware Kit — High-Tensile Stainless Steel Standard -
EN 545, 598 / ISO : 2531