MANOY® Back-Up Ring

Type SKI

MANOY® Back-Up Ring

Type STI

TECHNICAL DATAS

axial inner back-up axial inner back-up
Motion Motion
static, partially linear, partially rotary static, partially linear, partially rotary
Direction of pressure Direction of pressure
unidirectional unidirectional
Operating pressure (MPa) Operating pressure (MPa)
100 100
Diameter range (mm) Diameter range (mm)
4 to 3000 4 to 3000
Housing Housing
split

split

Type SKI axial inner back-up
Motion static, partially linear, partially rotary
Direction of pressure unidirectional
Operating pressure (MPa) 100
Diameter range (mm) 4 to 3000
Housing split
Type STI axial inner back-up
Motion static, partially linear, partially rotary
Direction of pressure unidirectional
Operating pressure (MPa) 100
Diameter range (mm) 4 to 3000
Housing split

APPLICATIONS

The MANOY® back-up ring is a sol­id or split ring which is rect­an­gu­lar or pro­filed in sec­tion. Vari­ous sec­tion­al pro­files and sizes are avail­able in stand­ard or cus­tom­ized ver­sions. MANOY® back-up rings can also be used in dynam­ic applic­a­tions – posi­tioned on both sides of the O-ring for altern­at­ing pressure.

SKI series
Intern­al back-up ring, concave

  • For stat­ic applic­a­tions, extern­al pressure
  • Little O-ring deform­a­tion due to the con­cave form, there­fore exten­ded ser­vice life and high­er stress possible
  • Easy to install in non-split grooves

STI series
Intern­al back-up ring

  • For stat­ic applic­a­tions, extern­al pressure
  • Also suit­able for X-rings
  • Easy to install in non-split grooves

CHARACTERISTICS

Sys­tem advantages:

  • Pro­duc­tion costs can be reduced due to lar­ger clear­ance gap 
  • Pre­vents met­al contact 
  • Com­pensates clear­ance gap and cross-sec­tion vari­ations caused by pres­sure expan­sion, thermal expan­sion, play and displacement
  • Allows the use of pre­ci­sion O-rings of medi­um hardness 
  • Suit­able for almost all fluids 
  • Avail­able for any cross-sec­tion dia­met­er and for indi­vidu­al groove dimensions 
  • Easy to install
  • Inex­pens­ive com­pon­ent with a massive effect

TEMPERATURE RANGE

From -200 to +200 °C

but depend­ent on the back-up ring mater­i­al in each case.

MATERIALS

IDG back-up ring material

  • 01A (PTFE)
  • 03A (PTFE/glass)
  • 62A (PTFE/carbon)
  • H12 (Ther­mo­plastic)
  • D12 (Ther­mo­plastic)
  • A12 (Ther­mo­plastic)
  • P50 (Ther­mo­plastic)

Mater­i­al descrip­tion and oth­er mater­i­als for wider applic­a­tions FIND OUT MORE >