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Pipe couplings and connecting elements

Grooved pipe connections (Grooved System) made of ductile iron according to ASTM A536 — state of the art in sprinkler construction. Up to 70% time savings compared to welded connections, no fire permit required, always removable for maintenance and expansion. For sprinkler systems, HVAC, and pressure pipelines.

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Darhan rigid grooved pipe coupling Grooved System ductile iron

Rigid grooved pipe coupling

Rigid connection for pipelines without angular or axial movement. Alternative to welded and flanged connections.

Darhan flexible grooved pipe coupling for thermal expansion

Flexible grooved pipe coupling

Flexible connection for pipelines. Accommodates axial and angular offsets. For thermal expansion and vibration decoupling.

Darhan grooved pipe elbow 90° grooved ends ductile iron

Grooved pipe elbow 90°

90° elbow with grooved ends made of ductile iron. Suitable for the Grooved System.

Darhan grooved pipe elbow 45° grooved ends Grooved System

Grooved pipe elbow 45°

45° elbow with grooved ends. For shallower direction changes in the pipe system.

Darhan grooved T-piece equilateral grooved ends Grooved

Grooved T-piece, equilateral

T-branch with three grooved ends of the same nominal diameter. For branches in the Grooved System.

Darhan mechanical branch fitting grooved design retrofittable

Mechanical branch fitting, grooved design

Retrofittable branch on existing pipeline. Grooved outlet end, can be installed without pipe cutting.

Darhan branch fitting with BSPT internal thread retrofittable

Mechanical branch fitting with internal thread (BSPT)

Retrofittable branch on existing pipeline. Grooved outlet end, can be installed without pipe cutting.

Darhan sprinkler T-piece full cast BSPT internal thread

Sprinkler T-piece full cast with internal thread (BSPT)

Sprinkler branch with BSPT internal thread. One-piece cast design for sprinkler lines.

Darhan sprinkler clamp branch U-bolt BSPT for sprinkler head

Sprinkler branch fitting, U-bolt with internal thread (BSPT)

Clamp branch with U-bolt for retrofitting on existing pipeline. BSPT internal thread for sprinkler head.

Darhan groove pipe closure cap grooved end Grooved

Groove pipe closure cap

Closure cap with grooved end for pipe ends in the Grooved system.

Darhan concentric groove pipe transition reduction grooved ends

Concentric groove pipe transition

Reduction between two nominal sizes with grooved ends. Concentric design.

Darhan groove adapter flange transition Grooved to flange

Nut-Adaptorflansch

Transition from Grooved to flange. Connection of fittings and units to the Grooved system.

Darhan shut-off valve GBV grooved ends sprinkler HVAC

Shut-off valve groove connection (Type GBV)

Shut-off valve with grooved ends for direct installation into the Grooved system. For sprinkler and HVAC systems.

Darhan shut-off valve WBV wafer installation form sprinkler HVAC

Shut-off valve installation form wafer (Type WBV)

Shut-off valve for clamping between two flanges. For sprinkler and HVAC systems.