Oct 22, 2021

Classification & Marking Method of DME Hydraulic Hose Fittings

Various hydraulic hose fittings and agricultural machinery.

In this issue, Niuniu will show you the classification and marking method of DME hydraulic hose fittings.

DEM hydraulic hose fittings and application poster

Hydraulic hose assemblies are used in many applications, but no matter the job, they carry fluids under extreme pressure to provide power to operate equipment. To be effective, and safe, a hydraulic assembly must include the correct hose for the application that meets pressure requirements and flow capacity. It also must have the correct fittings for the hose being used and proper installation of the fittings onto the hose.

We DME&JDE invest continually in R&D and technology, so our products not only outperform industry standards; they exceed our customers’ demanding expectations,and provide OEM solutions for hydraulic hoses and fittings through global professional partners.

The detailed structure of DME&JDE hose assembly.

The hose fitting is the connection of different hydraulic components, so that these hydraulic components form a closed loop hydraulic system.

Hose fittings are mainly divided into: crimping, reusable, push-on and so on. The crimping hose fitting is the most commonly used hose assembly fitting, is also the focus of the next introduction of Niuniu! (Take our DME&JDE fittings and hoses as an example).

Crimping, reusable and push-on hose fittings.

DME crimping hose fittings

  • DME crimping hose fittings
    The crimping hose fitting is mainly composed of a nipple, a ferrule (nuts are optional parts) and other parts.After assembling the nipple, hose and ferrule, the eight-segment crimp die of the crimping machine is evenly squeezed, and then the hose fitting is plastic deformation to a certain extent, making the hose fitting and hose called a "whole". We recommend our "Super Shield Flex" series EN856 4SP/4SH hoses to match this type of DME fittings.

    The detailed structure of DEM crimping hose fitting

    The crimping hose fitting is divided into two kinds: one piece and split.

    The detailed description of DEM crimping one-piece and split hose fittings

  • DME crimping hose fittings
    In production, it is necessary to skive the cover at the end of the hose and other crimping positions to expose the steel wire layer (which can not damage the steel wire), and then measure the outer diameter and inner diameter of the steel wire layer of the hose and calculate the crimping parameters; In assembly, first insert the hose into the ferrule, then insert the nipple into the hose, and finally crimp on the crimping surface of the hose fitting according to the corresponding crimping parameters after grouping the hoses.

    The detailed hose fitting crimping process and comparison before and after crimping.

  • JDE hose crimping form and characteristics
    The crimping form of hose mainly depends on the type of hose (or the size of inner and cover) and the pressure-bearing environment used by hose assembly, which is mainly divided into three types:No-Skive, Skive the cover, Skive the inner and cover.

    The detailed structure of both skive and no-skive hose fittings.

  • JDE hose crimping form and characteristics

    • No-Skive: The inner and cover of the rubber hose need not be skived, and the product can be finished only by crimping after loading the hose,the processing technology is simple. This crimping form is generally used in GB/T3683, EN853 and SAE standard of steel wire braided hose with thin cover.
    • Skive the cover: It is necessary to skive the cover of the rubber hose for a certain length (the cover is thicker), so as to make the steel wire reinforcement layer better contact with the tooth groove of the ferrule. When the ferrule shrinks and plastically deforms under the action of external force, the steel wire will be firmly crimped, thus preventing the fittings from being pulled out under the impact of high pressure.
      This crimping form is mainly applicable to GB/T 10544, EN856, SAE standard and other steel wire spiral hoses.
    • Skive the inner and cover: It is necessary to skive the inner and cover for a certain length (the inner and cover are thick), and the steel wire layer and inner rubber layer are extruded into wavy shape,generally applicable to GB/T 10544, EN 856-R13 and R15 and other large-size (over 32 inclusive) ultra-high pressure steel wire spiral hoses.
  • The structure of DME fittings after crimping
    The best crimping state is that the teeth of the ferrule bite the reinforcement, and the teeth have a certain deformation, and the nipple and the inner rubber are tightly attached to form a seal.

    The detailed structure of DME hose fittings after crimping

  • The appearance of DME crimping fittings

    Crimping hose fitting categories by appearance

    In addition to the above elbows, fittings have different bends: 22.5 ° bend, 30° bend, 60° bend, etc. You can choose the appropriate fitting style and bend according to your demand.

After introducing DME crimping hose fitting, Niuniu will briefly introduce DME other hose fittings.

DME reusable fittings

The reusable hose fitting compresses the hose through an extrapolated nipple,so that the hose clings to the inner cone of the fitting ferrule, forming a connection with a large binding force.We recommend our "Easy Flex" series ISO18752 1BS/2BS hoses to match this type of DME fittings.

DEM reusable hose fittings and applications

DME push-on fittings

A hose fitting that can be quickly and easily finished a hose assembly in the field without special tools. Suitable for low pressure hose.We recommend our "Super Shield Flex" series SAE R6,SAE R3 hoses to match this type of DME fittings.

The detailed structure of push-on hose fittings

Marking method of DME fittings

The detailed interpretation of DME hose fitting marking method

I hope that Niuniu's introduction will be helpful for you to understand DME hose fittings deeply.

  • DME uses all standard automation equipment to produce world-class and high-quality hydraulic fittings, hydraulic adaptors, hose fittings and flanges.

    The clean and tidy DEM&JDE group workshop

  • Introduced zinc-nickel plating technology, compared with SAE J514 standard, the DME hydraulic fittings can remain up to 1,000 hours in salt spray test without red rust, and have significant corrosion resistance.
  • Every batch of products from production to finished products has been strictly checked by quality inspection departments to ensure product quality.
  • DME company and its products have passed ISO 9001, ISO 14001 and IATF 16949 certification (please refer to the last issue of WeChat official account).
  • At present, we have a fitting stock of RMB 60 million, which can meet the daily delivery demand of customers.

Please believe that the high quality hydraulic hoses and fittings produced by DME&JDE will make your industrial hydraulic system more efficient and productive.