MANOY® Back-Up Ring

Type SKC

splitted version
MANOY® Back-Up Ring

Type SKS

MANOY® Back-Up Ring

Type SPR

MANOY® Back-Up Ring

Type STC

splitted version
MANOY® Back-Up Ring

Type STS

TECHNICAL DATAS

inner back-up inner back-up inner back-up inner back-up inner back-up
Motion Motion Motion Motion Motion
static, partially linear, partially rotary static, partially linear, partially rotary static, partially linear, partially rotary static, partially linear, partially rotary static, partially linear, partially rotary
Direction of pressure Direction of pressure Direction of pressure Direction of pressure Direction of pressure
unidirectional unidirectional unidirectional unidirectional unidirectional
Operating pressure (MPa) Operating pressure (MPa) Operating pressure (MPa) Operating pressure (MPa) Operating pressure (MPa)
60 100 25 100 100
Linear speed (m/s) Linear speed (m/s) Linear speed (m/s) Linear speed (m/s) Linear speed (m/s)
0,5 0,5 0,5 0,5 0,5
Diameter range (mm) Diameter range (mm) Diameter range (mm) Diameter range (mm) Diameter range (mm)
2 to 3000 2 to 3000 2 to 3000 2 to 3000 2 to 3000
Housing Housing Housing Housing Housing
non-split
(from 20 mm Ø) 		split

non-split
(from 10 mm Ø) 		non-split
(from 20 mm Ø) 		split

Type SKC inner back-up
Motion static, partially linear, partially rotary
Direction of pressure unidirectional
Operating pressure (MPa) 60
Linear speed (m/s) 0,5
Diameter range (mm) 2 to 3000
Housing non-split
(from 20 mm Ø)
Type SKS inner back-up
Motion static, partially linear, partially rotary
Direction of pressure unidirectional
Operating pressure (MPa) 100
Linear speed (m/s) 0,5
Diameter range (mm) 2 to 3000
Housing split
Type SPR inner back-up
Motion static, partially linear, partially rotary
Direction of pressure unidirectional
Operating pressure (MPa) 25
Linear speed (m/s) 0,5
Diameter range (mm) 2 to 3000
Housing non-split
(from 10 mm Ø)
Type STC inner back-up
Motion static, partially linear, partially rotary
Direction of pressure unidirectional
Operating pressure (MPa) 100
Linear speed (m/s) 0,5
Diameter range (mm) 2 to 3000
Housing non-split
(from 20 mm Ø)
Type STS inner back-up
Motion static, partially linear, partially rotary
Direction of pressure unidirectional
Operating pressure (MPa) 100
Linear speed (m/s) 0,5
Diameter range (mm) 2 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.

STS series
Back-up ring, solid

  • For stat­ic applic­a­tions, lin­ear and hel­ic­al motion
  • The end­less form pre­vents dam­age to the O-ring
  • Also suit­able for X-rings
  • For install­a­tion in split grooves – also often pos­sible in non-split grooves

SKS series
Con­cave back-up ring, solid

  • For stat­ic applic­a­tions, lin­ear and hel­ic­al motion
  • Little deform­a­tion of the O-ring due to the con­cave form, there­fore exten­ded ser­vice life and high­er stress possible
  • The end­less form pre­vents dam­age to the O-ring
  • For install­a­tion in split grooves – also often pos­sible in non-split grooves

SPR series
Spir­al back-up ring, two-layer

  • For stat­ic applic­a­tions and lin­ear motion
  • No open split if there is expan­sion under pressure
  • Adapt­able to smal­ler cross-sec­tion dia­met­ers by shortening
  • Also suit­able for X-rings
  • Easy to install in non-split grooves

STC series
Back-up ring, split

  • For stat­ic applic­a­tions and lin­ear motion
  • Split pro­duced by smooth sep­ar­a­tion, so there is no gap when installed
  • Expan­sion under pres­sure may cause the split to open and dam­age the O-ring; in this case the STS series is preferable
  • Also suit­able for X-rings
  • Easy to install in non-split grooves


SKC series
Con­cave back-up ring, split

  • For stat­ic applic­a­tions and lin­ear motion
  • Advant­ages of the con­cave form as for the SKS series
  • Expan­sion under pres­sure may cause the split to open and dam­age the O-ring; in this case the SKS series is preferable
  • 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 >