O-rings and Static

Sealing Profiles
 Trygonal
O-rings and Static
Sealing Profiles
We are an active international group of independent seal
Materials
manufacturers and plastics processors. In our group, we
We have a wide range of materials, both for stan-
produce all types of gaskets and plastic parts such as­ dard and specialty applications. A selection of our
O-rings, moulded rubber parts, metal rubber com- materials are EPDM, FPM, NBR, HNBR, CR, MVQ,
pounds, foam moulded parts, semi-finished products FVMQ, TFE, FFKM. For special applications, we
and machines for machining seals. The latest production also manufacture O-rings made out of UHMWPE,
We are a sealing and plastic parts manufacturer PTFE, PEEK, polyurethane, FEP-coated or metallic
techniques are used.
materials.

We see ourselves as a partner to our customers The most commonly used sealing element is the O-ring.
Trygonal offers a wide range of O-rings and static seals.
We are independent, holistic and solution-oriented Each O-ring size is available in metric or inch dimensions, Static sealing profiles
and custom sizes are possible. The smallest size starts n Dairy Fittings

We are an international network company and we at a cord thickness and internal diameters of less than n Square profiles
1 mm. The largest O-rings are manufactured in cross
work world-wide n Roof edge profiles
sections of 30 mm or larger and up to a diameter larger
n Double roof edge profiles
than 3 m.
We see our company culture like life: varied, complex n Back-up rings
and exciting

We value greatly the individuality and the expertise Surface treatment

of the staff O-rings can be specially surface treated. For ex-

ample: Labs-free, halogenated, greased with mo-
lykote, talc, PTFE-coated or cured.
We are committed to high professional ethics
and integrity in all we do
Delivery standards
All this creates a passionate, innovative and All O-rings are available in accordance with DIN
dynamic team to support your business. 3771, ISO 3601, AS 568 B, BS 1806, BS 4518 and
other standards.

Approvals
BAM, BfR, with DVGW W 270, FDA, MIL, KTW,
NSF, UL, USP, WRAS, 3-A Sanitary Standards

Applications
Automotive, construction, mining, railways, power
generation, aerospace, semiconductor, power
plant, solar and wind power, food & beverage,
engineering, medical, mobile hydraulics, oil & gas,
paper, pharmaceutical, steel works

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Delivery program

Standard O-rings Alternatives to the O-ring

Our O-rings are manufactured in all common rubber ma- Various profile geometries can be produced as an alter-
terials, according to international standards, in metric and native to the O-ring in turned and injection moulded form.
inch dimensions in hardness ranges from 40 to 95 Shore
Advantages:
A or IRHD. In addition, a large number of special materials
are available. Alternative profiles which do not require support rings
against gap extrusion
Advantage: Rectangular rings; static, axial and radial sealing
Tools are available for currently 30 347 dimensions no twisting possible
in 200 cord thicknesses.

Turned O-rings Back-up Rings

For special dimensions or if the application requires a Various support ring geometries are available in turned,
special material, O-rings can also be turned. Turned moulded, endless and slotted quality.
O-rings are available from batch size 1 up to several
Advantage:
thousand pieces, in dimensions from ø10 × 1.0 mm
to ø1450 × 25 mm depending on the material group. The Back-up Ring prevents the immigration
of the O-rings in the sealing gap.
Advantages:
no mould costs
Ring can be deployed in the shortest possible time

FEP, PFA coated O-rings

Determination and rough design of the O-ring
Sheathed O-rings combine the positive properties of
the sheath and the rubber-elastic core and are therefore
ideally suited for applications in the chemical, food and The O-rings are defined by the inner diameter and the For this reason, new tools are created for specific applica-
pharmaceutical industries. cord thickness. tions and quantities. In general, however, all O-ring sizes
can be manufactured in our O-ring Speed production
The dimension of the O-ring must be approx. 1–6% smal-
Advantages: in the required standards from a Shore hardness of 80
ler in the case of an external seal. The O-ring is thus
low coefficient of friction and good sliding properties Shore A up to a diameter of 2000 mm.
installed slightly stretched.
resistant to many organic and inorganic chemicals
The dimension of the O-ring should be approx. 1–3% O-ring special sizes
high thermal load capacity
larger in the case of an internal seal. The O-ring is thus Special O-ring sizes can also be manufactured according
FDA approved installed slightly compressed. to customer and application requirements – on request in
low vapour permeability specific materials.
O-ring Dimensions
low compression set
We stock more than 10 000 O-ring tools in our ware- International standards
house, which are constantly updated. Naturally, tools are All O-rings are available according to DIN 3771, ISO 3601,
not available for all standards and sizes. Depending on AS 568 B, BS 1806, JISB 2401, LJF R, MIL.
the material, different O-ring manufacturing tolerances
can result for the same nominal sizes as well as for diffe-
rent materials.

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Possible applications Manufacturing processes
Piston seal (static/dynamic) Depending on the pressure, additional support rings are We manufacture O-rings in various ways with different Injection moulding
used for flange, piston and rod applications. crosslinkers. In the injection moulding process, the material is automa-
tically injected into the mould. This process is suitable for
Shape and surface deviation Compression method
medium to large series.
The DIN ISO 3601-3 standard defines permissible form In the compression process, a blank is inserted into a
and surface deviations of O-rings. It distinguishes bet- mould, which consists of two mould halves and is closed. Impact vulcanised round cord rings
ween admissible mistakes according to their type cha- This procedure is suitable for small to medium series. If the mechanical requirements allow this, toroidal sealing
racteristics. rings can be vulcanised to O-rings. Almost any size can
Trygonal «Speed-Service», fast O-ring production
O-rings with the grade characteristic N are intended for be produced in the shortest possible time using this ma-
Rod seal (static/dynamic) If there is a hurry in the production or assembly, we pro- nufacturing method.
general applications and meet the high demands on dy-
vide O-rings (in smaller quantities) machining (from 80
namic and static seals.
Shore A) up to a diameter of 600 mm, and deliver them
O-rings with grade characteristic S are intended for appli- within 24 hours. If this is not enough, we can deliver the
cations that require a higher quality standard with regard O-ring by special transport within a few hours directly to
to permissible deviations and surface qualities. the customer.

O-ring alternatives, static sealing elements

Depending on the application, functional problems can
Flange gasket (static) also occur with O-rings (twisting, pressure, extrusion,
DVR, leakage). The solution is sealing profiles specially
developed for the application:
Surface treatment and coatings
Rectangular rings; static, axial and radial sealing
X-rings; radial, dynamic sealing
O-rings are surface treated or coated to improve assem- Mounting aid (MA)
Roof edge profiles; static, axial and radial sealing at bly, automatic mountability, optical, friction and cleanli- PTFE-FDA compliant (one-component)
higher pressures ness green.
Reduction of press-in forces
FEP coated O-rings; for high chemical material loads Surface adhesion moderate
Trapezoidal groove (static) Labs-free (no paint wetting interference – LA)
Metal rings; axial sealing at highest system pressures Silicones and other substances that interfere with Easy assembly (ME)
paint wetting are completely removed
PTFE PTFE-ME (one component)
After this process, the cleaned parts are safely
The PTFE O-ring is only suitable for static applications Separation is ensured
„labs-free“
such as flange sealing in chemical plant engineering and Automatic processing
Suitable for all materials except MVQ and MFQ
is the first choice for aggressive media.
O-rings that are mounted in paint shops or come Chemical resistance (CB)
TS35/TK35/TR35 into contact with paint must be „labs-free“ Coating with: Silicone, PTFE
Triangular groove (static) If an O-ring is to be used dynamically, there are better Improvement of chemical resistance
Dynamic Application (DA)
technical alternatives such as the TS35. A profile ring that
PTFE – black or grey Fluorination (FL)
cannot be twisted can be used for a longer period of time.
Well structured surface The result is a flexible, thin and hard outer layer
Metal + C-rings Mating surfaces made of metal that greatly reduces the coefficient of friction.
Metal + C-rings are used at higher temperatures up to Only NBR and EPDM materials can be treated.
Conditional Dynamic Application (BA)
980 °C and higher pressures up to 6800 bar. This treatment prevents sticking and facilitates
PTFE – transparent (two-component)
separation.
Suitable for plastic mating surfaces
Smooth surface structure

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Material overview

Qualities

operating temperature

operating temperature

Availible Compounds
Abrasion resistance
Rebound resilience

contact resistance
see table Approvals

Ozone resistance
Petrol resistance

Rigid, not elastic

Alkali resistance

Colour selection
Tear resistance,

Tear resistance,

Ageing stability

Acid resistance
Chemical name

Tear resistance

oil and grease

Other colours

Resistance to
Default color

unreinforced
Abbreviated
designation

elongation
Approvals

maximum

Hot water
Hardness

Code-No.
Electrical
amplified

Standard
Ultimate
minimal

Special
°C °C Shore A
Elastomer compounds
CR Polychloroprene elastomer black – 35 + 100 40 – 90 9 80 - 04
EPM/EPDM Ethylen-propylen-dien elastomer black green red beige blue grey – 40 + 140 30 – 90 33 80 -03
FFKM Perfluor elastomer black beige yellow white transparent – 55 + 300 50 – 80 4 80 -18
FPM Fluor elastomer black green red brown beige blue yellow white – 30 + 230 50 – 90 40 80 - 01
HNBR Hydrogenated acrylonitrile elastomer black green brown – 40 + 150 50 – 90 9 80 -09
IIR/CIIR Butyl elastomer/Chlorbutyl elastomer black – 50 + 100 60 – 80 3 80 -16
MFQ Flour silicone elastomer red brown blue grey transparent – 40 + 210 45 – 80 8 80- 07
MVQ Silicone elastomer red green beige blue yellow white grey – 40 + 230 30 – 80 51 80 - 06
NBR Nitrile-butadiene elastomer black green red blue yellow white grey – 40 + 120 40 – 90 41 80 - 02
NR Natural rubber black blue grey – 40 + 80 40 – 90 4 80 -08
SBR Styrene-butadiene elastomer black – 40 + 100 45 – 75 4 80 -12
TPU (AU / EU) Polyurethane elastomer red brown blue yellow transparent – 30 + 110 60 – 95 18 80 -13

Themoplastics
PEEK Polyetherketone beige –50 +260 – 6 80-63
PTFE Polytetraflourethylene white –200 +260 – 12 80-60
TPE Thermoplastic elastomers white various –40 +140 30–80 10 80-20
UHMWPE Polyethylene white various –200 +80 – 5 80-66

Other materials
Metal Metal – – –250 +500 – 4 80–70/71/72

very good good moderate conditionally insufficient

Customer service, packaging Storage Approvals /Conformity

Customer service, comprehensive advice and technical The storage life of the different materials depends on va- The materials and sealing elements we use must con-
support are our top priorities. From the development to rious boundary conditions (reference DIN 7716/DIN 9088). form to all legal requirements. Special material com-
the production process and the desired packaging, we pounds have been designed to meet all these standards.
rely on a trustful cooperation with our customers. Storage conditions
Ask us, we can help.
Heat the storage temperature should not exceed at 5°– 25°C; direct exposure
to sunlight should be avoided.
Technical advice for individual problem solving Humidity the humidity should be below 70 %; extreme conditions should be avoided.
Light the O-rings should be stored in dark rooms, they should be protected
Prototyping and product optimization from daylight.

Type Explanation Materials
Oxygen the O-rings should be packed in air-tight bags and protected from draughts.
On request application-related material mixtures, Deformation the O-rings should be stored in a relaxed state. O-rings of larger diameter
can be stored twisted and folded.
metal types, finishes (e.g. surface treatment) are

TPU (AU/EU)
EPM/EPDM

UHMWPE
available

IIR/CIIR
HNBR
FFKM

PEEK

PTFE
MVQ
MFQ

NBR
FPM

SBR

TPE
Depending on your requirements and drawings

NR
CR
Materials Maximum lifetime
ACS Drinking water in France •
An extensive range of standard articles is always AU, CIIR, EU, NR, SBR, TPU 5 years
BfR Compliance for food in Germany • •
CR, HNBR, NBR 7 years
on call EPDM, FFKM, FPM, MFQ, MVQ 10 years
DIN EN 681-1 Water supply and drainage •
DVGW DIN EN 549 Gas inserts in Germany • •
PEEK, PTFE, TPE, UHMWPE 10 years
Metal >10 years
DVGW W 270 Microorganisms in drinking water •
EC 2002/72 Food safety in EU
FDA Food and drug administration in USA • • • • • • • • • • •
KTW Drinking water in Germany • •
NSF 51 National science foundation; Food in USA •
NSF 61 Drinking water in USA •
USP Class VI U.S. Pharmacopoeia, United States • •
WRAS Drinking water in UK •

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Brief descriptions of elastomer compounds
Chloroprene elastomer (CR) Fluor elastomer (FPM) Fluor silicone elastomer (MFQ) Natural rubber (NR)

 Polychloroprene is an excellent universal elastomer with an attractive balance of There are different types of fluorine elastomers, they are based on monomers, which  In addition to the typical properties of normal silicone rubber (MVQ), fluorosilicone  Natural rubber (NK) is a highly polymeric isoprene with very good physical properties,
properties and few practical limitations. Universal neoprene grades are divided into form the framework of the elastomer. Three curing systems with different performance rubber (MFQ) also exhibits significantly improved heat resistance and very good low- very high tensile strength, very good elasticity, very good low temperature properties,
two groups: sulfur-modified grades and mercaptan-modified grades. Sulfur-modified characteristics are available. These characteristics define the performance of the temperature flexibility. good abrasion resistance and excellent dynamic properties. This combination is Depen-
neoprenes have increased tear strength and elasticity, while mercaptan-modified product. Contact your supplier to determine which product and curing system is best  Excellent weather resistance and excellent resistance to ozone and UV rays, good ding on achieved by synthetic elastomers.
neoprenes have better resistance to heat and compression set. suited for your process. electrical properties.  Without the appropriate addition of protective agents, however, the resistance to
 Good inherent flame resistance; moderate oil and gasoline resistance; excellent Excellent resistance to high temperatures; excellent resistance to oil, gasoline, hydraulic  Fluorosilicones show a considerably better resistance compared to standard silicones. ageing and ozone is low. There is no resistance to mineral oils and greases.
adhesion to fabrics and metals; very good weather, ozone and natural ageing fluids and hydrocarbon solvents; very good tightness to gases and vapours; very good chemical resistance in hydrocarbons, aromatic mineral oils, fuels and low-molecular  Despite more modern synthetic rubbers, natural rubber is still used for engine
resistance; good abrasion and flexural fracture resistance; very good alkali and acid resistance to weathering, oxygen, ozone and sunlight; good flame retardancy. aromatic hydrocarbons such as benzene or toluene. suspensions, machine bearings, rubber-metal compounds, clutches, damping
resistance. Medium tear and cut resistance, very low resistance to oxygenated solvents. elements and similar components.
 Poor to good resistance to aromatic and oxygenated solvents; limited flexibility at low
temperatures.

Ethylene-propylene diem elastomer (EPM/EPDM) Hydrogenated acrylonitrile-elastomer (HNBR) Silicone elastomer (MVQ) Styrene-butadiene elastomer (SBR)

 EPM and EPDM are both co- and terpolymers of ethylene, propylene and a monomer  Hydrogenated nitrile (HNBR) is a family of products designed to eliminate some of  The most outstanding property of silicone is its ability to maintain rubber-like properties  SBR is similar to natural rubber in most respects and is the most cost-effective and
containing diene (ter-employer) to facilitate vulcanization. The monomer ratios are varied the defects of nitriles. HNBR shows improved chemical resistance, a higher service through extreme temperatures. The operating temperatures range from –55 °C to highest-volume elastomer on the market. Although its physical properties are slightly
to obtain specific properties and properties. Due to their unique combination of pro­ temperature and a lower brittle temperature than normal nitrile. HNBR polymers are +200 °C. Silicones are normally used in applications that require high resistance. worse than those of natural rubber, SBR is tougher and more resistant to heat and
perties they can be used in a variety of products. reacted with hydrogen to hydrogenate part of the unsaturation of NBR to improve  Excellent heat resistance; excellent flexibility at low temperatures; low compression set; cracking and can easily be replaced by natural rubber in many applications. With the
 EPM elastomers have excellent resistance to ozone, water and steam, alkalis and acids, chemical compatibility with certain media such as sour gas, ozone and some additive very good electrical insulation; excellent resistance to weathering, ozone, sunlight and exception of silicone, butadiene has the lowest glass transition temperature of any
salt solutions and oxygenated solvents. packages. oxidation; excellent color stability. commercially available elastomer and offers unusually good performance at temperatures
 Very good resistance to oil and gasoline: excellent resistance to petroleum-based as low as –60 °C.
 EPM and EPDM have very low temperature resistance and excellent electrical pro­  Poor abrasion resistance, tear and cut growth resistance; low tensile strength; inferior
perties. Poor resistance to oil, petrol and hydrogenated solvents. hydraulic fluids, wide operating temperature range, good resistance to hydrocarbon resistance to oil, gasoline and solvents; poor resistance to alkalis and acids.  Very good elasticity, tensile strength, abrasion resistance and flexibility at low
solvents, very good resistance to alkalis and solvents. temperatures.
 Low resistance to ozone, sunlight and natural ageing, poor resistance to oxygenated  Poor resistance to ozone and sunlight; very low resistance to oils, petrol and hydro­
solvents. carbon solvents.

Perfluor elastomer (FFKM) Butyl elastomer (IIR) / Chlorbutyl elastomer (CIIR) Nitrile-butadiene elastomer (NBR) Polyurethane elastomer (TPU, AU / EU)

 Perfluoroelastomers are products with a high utility value.  Butyl is unlike other synthetic elastomers or natural rubber resistant to ozone and  NBR are copolymers of butadiene (BD) and acrylonitrile (ACN). The monomer ratio  Polyurethane is characterised by the combination of hardness with elasticity, excellent
 The best combination of chemical and high temperature resistance of all elastomers. corrosive chemicals. Butyl and chlorobutyl behave like plastic by creeping, flowing can be varied over a wide range. NBR with higher ACN offers improved oil resistance, abrasion resistance and high tear resistance. It can be either ether or ester based.
Thermal stability depends on polymer and curing chemistry. Peroxide crosslinking per- cold and having a poor compression set. CIIR differs from IIR essentially only in its fuel resistance and tear strength. The ester-based polymer is superior in resistance to abrasion and heat; the ether-based
fluoroelastomers have similar thermal stability to FKM, while proprietary curing systems better compression set.  Very good oil and petrol resistance: excellent resistance to Hydraulic fluids based on polymer has better flexibility at low temperatures. Polyurethanes are available in both
(such as Kalrez®) offer temperature resistance up to 327 °C (620 °F) with specific poly-  Excellent gas and vapour tightness, very good resistance to heat, Oxygen, ozone crude oil, large operating temperature range, good resistance to hydrocarbon solvents, liquid and solid form. Polyurethanes are mainly used in applications that require a
mers. and sunlight; high energy absorption (attenuation); excellent resistance to alkalis and very good resistance to Alkalis and solvents. combination of their excellent properties: Toughness, tensile strength and abrasion
oxygenated solvents; good hot tear strength; excellent resistance to water and steam. resistance.
 The performance of perfluoroelastomers is limited at lower temperatures.  Low resistance to ozone, sunlight and natural aging, poor Resistance to oxygenated
 High compression set; poor resistance to oil, petrol and hydrocarbon solvents; low solvents.  Excellent abrasion and tear resistance; very high tensile strength with good elongation;
rebound resilience; poor elasticity. excellent weather, ozone and sun resistance; good oil and gasoline resistance; excellent
adhesion to textiles and metals.
 Poor resistance to alkalis, acids and oxygenated solvents; poorer resistance to hot
water.

Brief descriptions thermoplastics

Polyetherketone (PEEK) Polytetraflourethylen (PTFE) Thermoplastic elastomers (TPE) Polyethylene (UHMWPE)

 The variable proportions of ether (E) and ketone/carbonyl groups (K) in the polyaryl-  Polytetrafluoroethylene is an unbranched, linear, semi-crystalline polymer consisting  Thermoplastic elastomers are plastics that behave at room temperature in a similar way  Polyethylene belongs to the group of polyolefins and is semi-crystalline and non-polar.
etherketones essentially determine the properties of these polymers. For example, of fluorine and carbon. PTFE belongs to the class of polyhalogen olefins, which also to classic elastomers, but can be plastically deformed when heat is applied and thus It is by far the most frequently used plastic.
the differences between polyether ketone, PEK and polyether ether ketone, PEEK. includes PCTFE (polychlorotrifluoroethylene). It belongs to the group of thermoplastics, exhibit thermoplastic behavior.  Polyethylenes are characterized by good wear and abrasion resistance, high impact
All polyaryletherketones are quite polar and of medium crystallinity. although it also has properties that make it more suitable for processing thermosetting  The two main material properties are compression set and stress relaxation. strength, high chemical resistance, low coefficient of friction and almost no water
 Polyether ether ketone has high mechanical strength, stiffness and hardness. It is wear plastics. absorption. Very good electrical insulators with high dielectric strength and physio­
 Compared to EPDM, they have worse material properties in the short-term behavior,
resistant and has excellent friction properties. In addition, the material is characterized  Fluoropolymers have very good electrical as well as excellent chemical properties. but in the long-term behavior the picture is reversed compared to EPDM. TPE are less logically harmless. In addition, they are well resistant to high-energy radiation.
by high chemical resistance and energetic radiation. Other physical properties such as mechanical strength and stiffness depend on the thermally and dynamically resistant than standard elastomers.  The mechanical properties are only moderate compared to other plastics.
 The materials show a high resistance to stress cracking, except against acetone; fluorine content and other additives.
they are only conditionally resistant to „hard“ UV light.  The wear resistance of PTFE is moderate, but can be improved by filler additives such
Oxidizing agents also attack and there is solubility in sulphuric acid. as graphite or bronze powder. It also has a tendency to creep.

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 O-rings and Static Sealing Profiles
Seals
Customised and Large Sealing Solutions
Materials and Semi-Finished Products
Machines, Software & Tools
Rubber Parts and Membranes
Rubber-Metal and Rubber-Plastic
Trygonal Group

Components
Vibration Technology and Gripper Rails
Plastic Turned and Milled Parts,
3D Printer Parts
Form and Foam Parts

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