Rotary seals
144Pages

Rotary seals

www. techne .fr • Direct and easy acces to our stock. • Technical information. • Material data sheets on line. • News from Techné. The information in this catalogue is based on the experience gained by Techné in the last decade of research on the development and manufacture of sealing products. It represents the current state of our knowledge and know-how. The sealing function of the products in this catalogue do no rely only on the component itself, but on the other parameters such as the assembly, the applied pressure, contact area, operating temperature, mechanical stress, media, liquids...

Rotary seals | Introduction

Rotary seals | Introduction Introduction General design of Techné rotary shaft seal 99Definition A rotary shaft seal, makes the sealing possible between a dynamic shaft and fixed housing. It is usually used in motors and transmissions. Designed to be used with mineral and synthetic based oils, and greases. Case Metal insert Air side Passive lip (or anti-dust lip) Active lip Lips To meet all sealing requirements, a rotary shaft seal has three main components: case, spring, lip active (and / or passive). These components must be selected depending on following working conditions : Fluids in...

Rotary seals | Introduction Metal case can be selected depending on housing and assembly conditions Al Stainless steel insert External case Double case Half covered case Half covered and ribbed case Lip can be selected depending on application SL Bonded PTFE inlay Double lips Double active lips Spring material and type can be selected depending on fluids in contact, shaft tolerances, shaft rotation speed SR Without spring Overmoulded spring On demand Techné can provide springs made of special alloys, see spring material page 134.

Rotary seals | Introduction To improve the sealing properties of rotary shaft seals, helixes may be implemented on the lip seals’ back (air side). They bring a pumping effect and therefore reject outgoing oil back to the fluid side. Helixes are oriented into the shaft rotating direction. Bi-directional helixes are also possible, although their effectiveness is not so good as unidirectional ones. HD HG HDS Right helix Left helix Bi-directionnal helix Depending on the use of the rotary shaft seal, we can easily find the right designation that meets your requirements. For example: Profile :...

Standard rotary seals

Rotary seals | Standard 1) Description ■ Type A & AS according to DIN 3760/3761 ■ Metal case covered with smooth rubber. DL type with an extra passive anti-dust lip. 2) Advantages ■ Good static sealing ■ Easy fitting & removal (without housing damage) ■ Suitable for gas and liquids ■ Prevents from a fretting corrosion ■ Possible use with fluids under pressure (see page 84) ■ Possible use with light alloys housings (with high thermal expansion such as aluminium) ■ Possible fitting in split housings 3) Limitations For a higher stiffness in the housing, see types AEX, T2 or 1/2E. 4)...

SL & DL rotary seals are used in various applications such as electrical motors, gear boxes, pumps etc.

Rotary seals | Standard 9AEX SL NBR: 22.2300 FKM: 22.2230 1) Description ■ Type B & BS according to DIN 3760/3761 ■ Machined outer metal case. AEX DL type with an extra passive anti-dust lip. 2] Advantages ■ Good stiffness in the housing ■ Avoid spring back of the rotary seal out of housing after fitting ■ Suitable for big dimensions ■ Precision fitting ■ Can be fitted in combination with V-Seals or Axial face seals 3) Limitations ■ Possible damage of the housing during fitting & removal (especially with light alloys and soft materials housings) ■ Not recommended for housings made of alloys...

AEXSL & AEXDL are used in various applications uch as heavy machinery, ships, etc.

Rotary seals | Standard 1) Description ■ Type C & CS according to DIN 3760/3761 ■ Double outer metal case. T2 DL type with an extra passive anti-dust lip. 2] Advantages ■ Excellent stiffness in the housing ■ Avoid spring back of the rotary seal out of housing after fitting ■ Recommended for big dimensions ■ Precision fitting ■ Can be fitted in combination with V-Seals or Axial face seals 3) Limitations ■ Possible damage of the housing during fitting & removal (especially with light alloys and soft materials housings) ■ Not recommended for housings made of alloys with high thermal expansion...

T2SL & T2DL are used in various applications uch as heavy machinery, public works, mills, steel industry, etc.

Rotary seals | Standard 9AN SL NBR: 22.2120 FKM: 22.2291 1) Description Metal case covered with rubber additional outer ribs. DL type with an extra passive anti-dust lip. 2] Advantages ■ Good static sealing ■ Easier fitting & removal (without housing damage) ■ Allows a straight aligned fitting ■ Prevents rotary seal from springing back from housing ■ Suitable for gas and liquids ■ Prevents from a fretting corrosion ■ Possible use with fluids under pressure (see page 84) ■ Recommended with light alloys housings (with high thermal expansion such as aluminium) ■ Possible fitting in split...

AN SL & AN DL rotary seals are used in various applications such as electrical motors, gear boxes, pumps etc.

Rotary seals | Standard 91/2EN DL HD FKM: 22.2296 VQM: 22.2496 1) Description ■ Metal case partially covered with rubber additional outer ribs and helixes. DL type with an extra passive anti-dust lip. 2] Advantages ■ Good static sealing ■ Improved dynamic sealing thanks to helixes (see page 4) ■ Good stiffness in the housing ■ Prevents rotary seal from springing back from housing ■ Suitable for gas and liquids ■ Possible use with fluids under pressure (see page 84) ■ Possible fitting in split housings 3) Limitations ■ Possible damage of the housing during fitting & removal (especially with...

Rotary seals | Standard 1/2EN DL HG & 1/2EN DL HD rotary seals are used in various applications such as automotive motors, gear boxes, pumps.