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General Information
HTMS Metal- O-Ring professional seals are made from high precision metal tube. Contrary to flat gaskets, HTMS Metal-O- Rings require extreme low bolting load. Because they feature a certain resiliency or spring back, HTMS Metal O Rings will compensate minor flange rotation and maintain positive sealing load to the sealing surface.
For sealing thin gas or low viscosity fluids, HTMS recommend to soft plate the bare metal seal with such materials as silver, gold or tin. Also PTFE as a coating is available.
HTMS Metal O Rings are made for internal or external pressure. For high pressure application HTMS advises vented or system pressure assisted Metal O Rings.
For extreme low leakage requirements at elevated temperatures HTMS also produces spring energized metal O Rings. This “OS” design is basically a metal O Ring with an inserted high tensile spring.
Metal O Ring availability
- From 6 mm to +3000 mm diameter
- Cross section from 0, 89 mm to 12, 7 mm
- In house plating, Silver, Gold, Tin and others
- Spring energized versions for extreme tightness
- Available in shaped forms
- For internal or external pressure
Metal O-Rings capability
- Temperatures from cryogenic (- 270°C) up to high temperatures (+ 900°C)
- Ultra hard vacuum and pressures op to +300Mpa
- Handles hydrogen gas up to non- Newtonian fluids
- Moderate pressure capability
- Lowest leak rate
- Radiation resistant
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Alumina ceramics:
AI2O3-99% AI2O3-97%
Purigy--------------------% „99.5 „97.0
Density-------------------g/cm3 3.89 3.71
Hardness Vickers1kg-------Kg/mm2 2000 1900
Modulus of Elasticity-----GPa 330 280
Fracture toughness--------Mpa*m1/2 3.8 3.5
Flexural Strength (MOR)---MPa 330 320
Compressive Srrength------MPa 2600 2300
Thermal Expansion (CTE)---10-6/K 8.2 8.0
Thermal conductivity------W/(m.K) 30.0 26.0 |
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Extruded and jointed "O" rings are our preferred method of production, but moulded versions are available if specifically requested.
Both silicone & fluorosilicone with all varieties of fillers are available for the manufacture of "O" rings.
The advantages of vulcanised "O" rings are:
- Cost Effective
- No tooling costs
- Reduced lead times
- Better surface finish (zero flash)
- Allows hollow sections to be used for lower compression force
-Custom lengths easily produced (up to approx 2m developed length) |
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Customized production of o-rings
You can't find what you're looking for in our vast range? No problem - COG customised production will be pleased to help with your special requirements. Even the most "unconventional" professional seals can be individually manufactured at our own production facilities (in-house compounding, in-house development, in-house toolmaking). In the materials and qualities of your choice - within a matter of days. Singly and in large or small batches. It's an offer that few other manufacturers can match. And another thing that you'll be pleased to hear: customised production at COG costs less than you think. Let's talk about your aims!
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| O-Rings Professional seals in standard and metric dimensions and different compounds always available ex stock. |
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O-rings, produced according to DIN 3771: All current materials: ACM, AU, CSM, CR, EPDM, EPM, FEPM, FFKM, FPM, FYMQ, HNBR, IIR, NBR, NR, PTFE, PVMQ, VMQ.
Inside diameter from 0.74 to 1400 mm; Strength of thread from 0.6 to 30mm
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Our seven million stocked 'O' professional rings include inch sizes and metric sizes to a range of international, national and industry standards.
These are held in a variety of general and high performance elastomers to suit the vast majority of industrial and specialist professional oil and gas sector applications. |
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| Broad chemical resistance, except against liquid alkaline metals and fluorine gas under pressure. Good sliding qualities, low wear and tear. Temperature range from -200 °C to +260°C. PTFE has hardness of approximately 95 °Shore and installing these O-rings in split grooves is recommended or alternatively the use slit or sheathed types due to the low elasticity. |
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| CoorsTek offers a wide variety of long-life, heat-stable, and corrosion-resistant ceramic hard-face professional seals using high-grade aluminas, silicon carbide, tungsten carbide, carbon graphite, and specialty polymers. |
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| ... products without technical information |
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