Spring Energized Seals | Synerings®

 

The Synering® system is an advanced sealing concept designed to meet extreme demands regarding temperature, medium, etc. which cannot be covered by conventional sealing compounds (like elastomers, PUR, fabric materials, etc.)
PTFE is hardly elastic. Therefore, PTFE sealing elements have to be combined with an elastic component, usually an O-ring. Synerings® consist of a PTFE part, made of a specially modi ed compound, and an energizing spring (standard: stainless steel). So, the outstanding thermal and chemical properties of PTFE can be used to full advantage.

NewDealSeals supplies a wide range of spring-energized seals as an economic alternative to for instance Balseal®, Flexiseal®, Omniseal® and Variseal®.

Advantages Spring Energized Seal

  1. To make this sealing system readily available for existing equipment, the standard designs are dimensionally adapted too to be installed in standard O-ring grooves.
  2. Outstandingly high chemical and thermal resistance.
  3. Unlimited storing time.
  4. Synerings® can be sterilized in autoclaves or with any possible agent – except radioactive radiation.
  5. Easy to clean in assembled as well as in disassembled state.
  6. As Synerings® contain only PTFE and stainless steel, contacting media will not receive any contamination from the seal.
  7. No stick-slip effect.
  8. Very low friction.
  9. High sealing efficiency after a short running-in period.

How does the Synering® work

The Synering® is compressed radially resp. axially when installed in the seal gland. The resilient spring responds with constant force, pushing out the sealing lips. As system pressure is applied, the seal is additionally energized, increasing the sealing force.

In dynamic applications, the spring expands, compensating for seal wear while continuing to provide load. In conditions that see thermal cycling, the spring continues to energize the seal lips without taking a compression set or becoming too soft or too hard.

The exible spring provides a wide tolerance range that can help overcome hardware misalignment and eccentricity without causing excessive friction or leakage.

The main characteristics of the spring are the spring force and the de ection range. The spring force in uences the sealing function, friction and wear. The de ection range determines the ability of the seal to compensate for seal wear and variations in gland tolerances.

Technical Specifications

Working temperature

Synerings® with V-spring: – 150 to + 225 °C

Synerings® with O-spring: – 150 to + 260 °C

Velocity

Synerings® with V-spring

Reciprocating:15-20 m/s

Helical and rotating:≤ 4 m/s

Synerings® with O-spring

Reciprocating:15-20 m/s

Helical and rotating:≤ 4 m/s

Pressure

Synerings® with V-spring:

≤ 350 bar

Synerings® with O-spring:

≤ 800 bar

Profiles Spring Energized Seals

PROFILE S1

Rotating

The profile S1 consists of a PTFE sealing ring with a V-spring. The profile S1 is appropriate for rotating applications as an alternative to an O-ring in situations where sealing performance and friction have to be optimized.

PROFILE S2

Dynamic rod sealing

The profile S2 consists of a PTFE sealing ring with a V-spring. The profile S2 is appropriate for dynamic rod sealing applications as an alternative to an O-ring in situations where sealing performance and friction have to be optimized.

PROFILE S3

Dynamic piston sealing

The profile S3 consists of a PTFE sealing ring with a V-spring. The profile S3 is appropriate for dynamic piston sealing applications as an alternative to an O-ring in situations where sealing performance and friction have to be optimized.

PROFILE S4

Static inside sealing

The profile S4 consists of a PTFE sealing ring with an O-spring. The profile S4 is appropriate for static inside sealing applications as an alternative to an O-ring in situations where sealing performance has to be optimized.

PROFILE S5

Static outside sealing

The profile S5 consists of a PTFE sealing ring with an O-spring. The profile S5 is appropriate for static outside sealing applications as an alternative to an O-ring in situations where sealing performance has to be optimized.

PROFILE S6

Flange sealing: internal pressure

The profile S6 consists of a PTFE sealing ring with an O-spring. The profile S6 is appropriate for flange sealing applications with internal pressure as an alternative to an O-ring in situations where sealing performance has to be optimized.

PROFILE S7

Flange sealing: external pressure

The profile S7 consists of a PTFE sealing ring with an O-spring. The profile S7 is appropriate for flange sealing applications with external pressure as an alternative to an O-ring in situations where sealing performance has to be optimized.

NDS PTFE Compounds

Color Temperature Application Characteristics
NDS-100
PTFE virgin
White -190 to +230 °C Chemical Industry, Food Industry High chemical restistance
NDS-123
PTFE +15% glass, +5% molybdenum disulfide
Grey -190 to +290 °C Medium-duty High chemical restistance, High creep resistance, Electrical properties like virgin PTFE
NDS-150
PTFE modified
Blue -190 to +230 °C Low-duty hydraulic applications Improved wear resistance
NDS-225
PTFE +25% carbon
Black -190 to +315 °C Pneumatics Rotary sealing High wear and creep restistance
NDS-235
PTFE +10% carbon fibre
Black -260 to +310 °C Water hydraulics, Seawater, Short strokes with high frequency Very good wear properties
NDS-415
PTFE +15% graphite
Antrachite -190 to +230 °C Low mechanical stress, Soft sealing Surfaces Chemical resistance
NDS-640
PTFE +40% bronze
Bronze -156 to +260 °C Medium and heavy mechanical stress, Hydraulic applications Outstanding wear and creep resistance
NDS-660
PTFE +60% bronze
Bronze -156 to +260 °C Heavy mechanical stress, Hydraulic applications Outstanding wear and creep resistance
NDS-750
PTFE + polyimide
Tan -260 to +310 °C High speed rotating applications Use against soft metals

Related PTFE Seals

Back-up Rings

Back-up rings are used for static and dynamic applications in connection with O-rings, to prevent extrusion of the O-ring into the diametrical clearance.

Back-up Rings ►

Rotary Seals

Rotary seals are used in applications with oscillating or rotating movements in order to retain liquid lubricants and to prevent the penetration of dirt and water.

Rotary seals ►

Rod Seals

The Rod Seal consists of a single-acting PTFE rod sealing ring and an O-ring. They are combined as a single unit and are appropriate for rods and plungers in hydraulic cylinders.

Rod seals ►

 

Contact Us

We believe in the quality of our products and service. Fill out the form and one of our skilled engineers will contact you within the next business day.

Contact details

  •  +31 (0) 226 362 233
  •  info@newdealseals.com
  •  Energiestraat 2-5, 1749DN Warmenhuizen, Nederland

9 + 13 =