Hydraulics Fittings : Single Ferrule Fittings / Din 2353 Fittings
“K.H” high pressure steel fittings are manufactured to DIN 2353 specification and ISO 8434 – 1 for ease of Interchangeability. These fittings are available for different pressure rating from 100Bar to 630Bar
| Type | Flare less Bite Type (Single Ferrule) 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 |
| Standard | DIN 2353 / 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
“K.H.” Single Ferrule Fittings / Din 2353 Fittings is a three piece design consisting of a body portion, a coupling nut and a ferrule. During the assembly the nut is progressively tightened causing hardened ferrule 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
RECOMMENDATION
Use Seamless tube as per Standard ST37.4 or DIN 1630 – 2391 for proper biting on tube.
