PISTON SEAL

Piston Seals or Piston Rings are used in hydraulic cylinders for fluid sealing and are designed to ensure that pressurised fluid does not leak across the cylinder head as the system pressure pushes the piston down the cylinder bore.

The choice of piston seal is decided by the way in which the cylinder operates. For a cylinder which is exclusively single-acting, capable of sealing dynamic pressure from one side (unidirectional), it is always best to choose the type of seal designed to provide optimum sealing qualities for single-acting functions.

The best sealing capacity of a double-acting cylinder, capable of sealing dynamic pressure from both sides (bidirectional), is achieved by choosing a double-acting seal.

A piston design where two single-acting seals on the piston for a double-acting cylinder are used can easily give rise to a breakdown. The reason is that a very high pressure can be trapped between the seals.

Piston seals, both single and double-acting, can be designed for and used with integrated or separate back-up rings and guide rings.

KR

Standardized with the materials of high performance PU 93 Shore A, UNR/UHR are used very widely in hydaulic cylinders. Having shorter inner sealing lip UNR/UHR nutrings are designed especially for rod applications.

KR

Technical Data Pressure: ≤ 400 Bar
Temperature: -30°C +100°C
Speed: 0.5m/s
Media: Hydraulic oils (mineral oil-based)

Material
Material: PU
Hardness: 93∓ 2 Shore A
Color: Blue / Green / Light yellow

Advantages
High resistance to high temperature
High abrasion resistance
Low compression set
Easy installation

DAS

With 5 parts design our DAS compact seals are used as piston seal for double acting cylinders at maximum 400 bar. DAS has a NBR ring, having 3 sealing lips, in the middle; 2 polyester elastomer back-up rings used for decreasing permissible gap in both sides.

DAS

Technical Data Pressure: ≤ 400 Bar
Temperature: -35°C to +100°C
Speed: ≤ 0.5m/s
Media: Hydraulic oils (mineral oil-based)

Material
Material: Profile seal: NBR / Back-up ring: polyester elastomer / Guider ring: POM
Color: Profile seal: Black / Back-up ring: Blue / Guider ring: Black

Advantages
Good sealing effect, also suitable for holding cylinders
Insensibility against shock loads and pressure peaks
Capable of installation in closed grooves ofr reduced machining costs

DBM

With 5 parts design our DBM compact seals are used as piston seal for double acting cylinders at maximum 400 bar. DBM has a NBR ring; 2 polyester elastomer back-up rings used for decreasing permissible gap in both sides; 2 POM rings as guide besides them.

DBM

Technical Data Pressure: 400 bar
Temperature: with NBR O-ring: -35°C to +105°C
with FKM O-ring: -35°C to +200°C
Speed: 0.5m/s
Media: Hydraulic oils (mineral oil-based)

Material
Material:Profile seal: NBR / Back-up ring: polyester elastomer / Guider ring: POM
Color: Green/Brown O-ring: Black/Brown

Advantages
Good sealing effect, also suitable for holding cylinders
Insensibility against shock loads and pressure peaks
Capable of installation in closed grooves ofr reduced machining costs
Easy installation

UR

Having been used very widerly in hydraulic cylinders, USH can be used for piston and rod applications because of having the height of both sealing lips equal. Standardized with the materials of NBR 85 shore A, USH is also manufactured with Viton (FKM)material.

UR

Technical Data Pressure: ≤ 150 Bar Temperature: NBR -35°C to +105°C
FKM -35°C to +200°C
Speed: ≤ 5m/s Media: Hydraulic oils (mineral oil-based)

Material
Material: NBR/ Viton /Silicone
Color: Blue

Advantages
High resistance to high temperature
High abrasion resistance
Low compression set.
Easy installation

PTFE Piston Seal

BSF piston seals have designs in 2 parts consisting of special compound PTFE ring and O-ring used as pressure ring. This design is suitable up to a pressure of 400 bar in double acting cylinders. The advantages compared with other sealing systems are linear velocity reaching at 5 m/s.

PTFE Piston Seal

Technical Data Pressure: ≤ 400 Bar
Temperature: with NBR O-ring: -35°C to +105°C with FKM O-ring: -35°C to +200°C
Speed: ≤ 0.5m/s
Media: Hydraulic oils (mineral oil-based)

Material
Material: PTFE+Bronze O-ring
Hardness: 93 ∓2 Shore A
Color: Blue / Green / Light yellow

Advantages
High resistance to high temperature
High abrasion resistance
Low compression set
Easy installation

SPG

Produced with a combination of special compound PTFE ring and 70 shore NBR Square-ring, our SPG design has a wide application area. Being able to be usded safely at high linear velocity, SPG type seals can also work in higher temperatures or different liquids by means of changing square-ring used as pressure ring.

SPG

Technical Data Pressure: ≤ 400 Bar
Temperature: with NBR Square-ring: -35°C to +105°C
with FKM Square-ring: -35 to +200
Speed: ≤ 0.5m/s
Media: Hydraulic oils (mineral oil-based)

Material
Material: PTFE with Bronze Squate-ring: NBR/FKM
Color: Green/Brown Square-ring: Black/Brown

Advantages
High static and dynamic sealing effect
Low friction, high efficiency
Stick-slip free starting, no sticking
Easy installation

SPGW

SPGW heary duty piston seals are designed for double acting hydraulic cylinders used in heary duty applications. They consist of PTFE ring, 2 POM support ring and NBR pressure ring. Some advantages are its simple design, high linear velocity values, non-bonding property on the surface in long static cases, low friction, wider permissible gaps and long life sevice. Therefore, SPGW is very suitable for heary duty applications.

SPGW

Technical Data Pressure: 400 bar
Temperature: with NBR Square-ring: -35°C to +105°C
Speed: ≤ 1.5m/s
Media: Hydraulic oils (mineral oil-based)

Material
Material:rofile seal: PTFE with Bronze / Back-up ring: POM / Pressure ring: NBR
Color:Profile seal: Green/Brown / Back-up ring: Black / Pressure ring: Black

Advantages
High sliding speed
Low friction, free of stick-slip
Simple groove design
Increase clearance possible

HDD Machine Mud Pump Seal

Standardized with the materials of high performance PU 93 Shore A, HDD Machine MUD Pump are used very widely in HDD Machines.

HDD Machine Mud Pump Seal

Technical Data Pressure: ≤ 400 Bar
Temperature: -30°C +100°C

Material
Material: NBR+Nylon
Hardness: 93∓ 2 Shore A
Color: Black

Advantages
High resistance to high temperature
High abrasion resistance
Low compression set
Easy installation