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Hydraulics Fittings : Single Ferrule Fittings / Din 2353 Fittings

“J. J.” high pressure steel fittings are manufactured to DIN 2353 Fittings specification and ISO 8434 – 1 for ease of Interchangeability. These DIN 2353 Fittings are available for different pressure rating from 100Bar to 630Bar

Type

Flare less Bite Type (Single Ferrule Fittings) Weld Nipple Type

Series

LL (Very Light), L (Light), S (Heavy)

Size

4mm to 42mm, 1/8”OD to 2”OD, 1/8”NB to 2”NB

Material

Steel, Stainless Steel, Brass (From extruded bar or forging)

Pressure

Ranging from 100Bar to 630Bar depending on type and size

Material

Steel, Stainless Steel, Brass (From extruded bar or forging)

Standard

DIN 2353 Fittings / ISO 8434 - 1

Surface Treatment Top Bottom Plate

Steel	–	Zinc Coated (A3C) Phospatised or Trivalent Cr.
Stainless Steel	–	Electro polished, Nut Silver Plated to avoid galling.
Brass	–	Natural

THEORY OF OPERATION

“J. J.” Single Ferrule Fittings / Din 2353 Fittings is a three piece design consisting of a body portion, a coupling nut and a double ferrule fittings. During the assembly the nut is progressively tightened causing hardened double ferrule fittings to slide along the inner conical seat of the body and grip the tube. Tightening the nut, ring deforms due to 24 degree cone of fittings and bites into the steel tube, producing deep cut on the tube. The cut is visible on the outer diameter of the tube. This cut on the tube acts as metallic interlock and makes the joint leak proof at high pressure and under vibration

ASSEMBLY

Before Assembly	After Assembly



RECOMMENDATION
Use Seamless tube as per Standard ST37.4 or DIN 1630 – 2391 for proper biting on tube.

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