PISTON SEAL KT4

STANDARD SEAL DIMENSIONS

DESCRIPTION

The KT4 compact seal is made of a central unit made of NBR working as a seal, two side supports, working as anti-extrusion ring, and two external guide rings, keeping aligned the piston in the cylinder.

TECHNICAL DATA

Pressure: from 0 to 300 bar with peaks till 400 bar at 60°C
Speed: < 0.5 m/s Temperature: from - 30 °C at +100 °C Fluids: Mineral oils

MATERIAL

The compounds used to manufacture this seal type are:
• The central units is made of NBR, the hardness is 70 Shore A ± 3
• The sides support are made of thermoplastic elastomer (TPE)
• The external wear rings are made of polyacetalic resin (POM)

ASSEMBLING

The assembling of this seal can be carried out in either closed groove in a mono-block piston, or in open groove in a two-parts piston. The assembling has to be done as follows:
• Rubber element;
• Supports;
• Wear rings.
The piston must not have machining scores which may damage the rubber unit during the installation.

Piston Sealsjul 30th, 20130 comments

PISTON SEAL DT6

STANDARD SEAL DIMENSIONS

DESCRIPTION

The DT6 piston seal is composed of two rings. The dynamic seal is a filled PTFE ring with the required shape, the static seal is an O-Ring also working as energizer.

TECHNICAL DATA

Pressure: < 600 bar Speed: < 15 m/s Temperature: from - 30° C up to + 100° C for the standard type with nitrile OR. Short peaks till 120° C. For a different temperature range, the O-Ring should be replaced by a more suitable model.

MATERIAL

Bronze-filled PTFE for the standard type, and NBR for the O-Ring.

Piston Sealsjul 30th, 20130 comments

PISTON SEAL DT11

STANDARD SEAL DIMENSIONS

DESCRIPTION

The DT11 seal has a double profile in the in the dynamic part, and two small steps in the static part where the Q-ring is housed. The Q-ring energizes the seal and provides a perfect sealing performance at low and high pressure. The shape of the central double profile prevents hydrodynamic pressures on the seal and the resulting blow-out effect.

TECHNICAL DATA

Pressure: < 250 Bar with a C0-type material at 93 Shore A, at a temperature of 60° C. < 400 Bar a D0-type material, at 98Shore A, at a temperature of 60° C. Speed: < 0.8 m/s Temperature: from – 35° C to + 100 ° C with peaks up to 110° C. Fluids: mineral oils

MATERIAL

The sealing parts are in polyurethanes with different hardness, according to the specific operating pressures.

ASSEMBLING

Cutting edges or flash must be removed in the housing of the seal. Ensure a lead-in chamfer in the bore to facilitate the piston installation.

Piston Sealsjul 30th, 20130 comments

PISTON SEAL DT9

STANDARD SEAL DIMENSIONS

DESCRIPTION

The DT9 seal type shows a double profile on the dynamic side and a surface with two small steps on the static side, where the o-ring is housed. The presence of the o-ring, which energizes the seal, ensures a perfect seal performance at low and high pressure. The special double profile avoids any Hydro-dynamic pressure on the sealing part and the consequent blow-by effect.

TECHNICAL DATA

Pressure: < 250 bar with standard material 93 Sh A at 60° C (C0) Pressure: < 400 bar with alternative material 98 Sh A at 60° C (D0) Pressure: < 500 bar with alternative material 55 Sh D at 60° C (E0) Speed: < 0.5 m/s Temperature: from - 35° C to + 100° C, with peaks at 110° C Fluids: mineral-based fluids

MATERIAL

The chosen material is polyurethane, with hardness according to the working pressure. The o-ring is in NBR hardness is of 70 Shore A.

ASSEMBLING

Remove any cutting edges and flash in the housing of the seal. Ensure a lead-in chamfer in the bore to facilitate the piston installation.

Piston Sealsjul 30th, 20130 comments

PISTON SEAL MA20

STANDARD SEAL DIMENSIONS

DESCRIPTION

The MA20 piston seal type is similar to the MA8 type, but it has an acetylic resin wear ring to mitigate possible misalignments and avoid extrusion. A RR retaining ring made of thermoplastic resin prevents seal extrusion during the cycle inversion.

TECHNICAL DATA

Pressure: < 400 bar at a temperature of 60° C Speed: < 0.5 m/s Temperature: from - 35° C to + 100° C with peaks till +110° C Fluids: mineral fluids and oils

MATERIAL

The proposed

MATERIAL

is polyurethane with high modulus of elasticity, low compression set and high abrasion resistance. The wear ring is made of a acetylic resin reinforced with fibreglass. The retaining seal is made of thermoplastic resin.

ASSEMBLING

Avoid all cutting edges and flash on the piston where the seal is housed. A lead-in chamfer in the groove will facilitate the piston insertion. Lubricate the seal before installation.

Piston Sealsjul 30th, 20130 comments

PISTON SEAL MA11

STANDARD SEAL DIMENSIONS

DESCRIPTION

The MA11 seal type is specially designed for heavy duty applications. When the coupling clearance between bore and piston cannot be reduced and the pressure is very high – above 250 bar – the MA11 seal type, thanks to a strong anti-extrusion ring, is among the most appropriate of seal types.

TECHNICAL DATA

Pressure: < 400 bar at a temperature of 60° C Speed: < 0.5 m/s Temperature: from - 35° C till +100° C Fluids: mineral oils

MATERIAL

The

MATERIAL

used for the seal is polyurethane at 93 Shore A with high elasticity module. The anti-extrusion ring is made of acetylic resin reinforced with fibreglass and with high tensile strength.

ASSEMBLING

The

ASSEMBLING

of this seal is done in semi-open groove. The anti-extrusion ring should be installed after the seal. It is important to remove any flash or cutting edge on the piston not to damage the seal during the overlapping.

Piston Sealsjul 30th, 20130 comments

PISTON SEAL MA8

STANDARD SEAL DIMENSIONS

DESCRIPTION

The MA8 seal type has been conceived to work on the piston and it can be used for simple or double effect. Its has asymmetrical lips which ensure a continuous contact with the bore, even in case of high misalignments. The installation is done in semi-open groove by overlapping, since the material has a high modulus of elasticity.

TECHNICAL DATA

Pressure: < 400 bar at a temperature of 60° C
Speed: < 0.5 m/s
Temperature: from – 35° C to + 100° C, with peaks till 110° C
Fluids: mineral-based oils and fuels

MATERIAL

The material used is polyurethane with a high modulus of elasticity, low compression set and high wear resistance. Its hardness is 93 Shore A ± 2.

ASSEMBLING

Remove any flash or cutting edges on the piston where the seal is housed. Provide a lead-in chamfer in the bore to have an easier piston insertion. Lubricate the packing before installation.

Piston Sealsjul 30th, 20130 comments

PISTON SEAL MA6

STANDARD SEAL DIMENSIONS

DESCRIPTION

The MA6 seal type combines in one solution two different installations and applications. With two symmetrical lips, it can be used both for rod and piston sealing applications and for cylinders working with simple or double effect. The profile with equal lips and the deep groove ensures low friction and a linear movement even at low pressure.

TECHNICAL DATA

Pressure: < 400 bar at a temperature of 60° C Speed: < 0,5 m/s Temperature: from - 35° C to + 100° C, with peaks till + 110° C Fluids: mineral hydraulic oils

MATERIAL

The proposed material is polyurethane, with high elasticity modulus, fundamental for the sealing, low compression-set and high abrasion resistance.
The hardness is 93 Shore A ± 2.

ASSEMBLING

The high modulus of elasticity of the polyurethane helps the sasembling. It is recommended to lubricate the seals before installation and to eliminate any edges or flash which could damage the seal.

Piston Sealsjul 30th, 20130 comments