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APSOseal® O-Rings

For all applications – from one source

  • O-rings overview: red FEP-O-Seal with Angst+Pfister branding, black Kalrez and blue PERTEC o-rings
  • O-rings overview: red FEP-O-Seal with Angst+Pfister branding, black Kalrez and blue PERTEC o-rings

A comprehensive o-ring assortment

For more than 100 years, O-rings have been established as the preferred sealing elements in all branches of industry thanks to their simple geometry and high sealing performance. Angst+Pfister's range of O-rings covers the entire spectrum from high-performance elastomers to materials for standard applications – all at an excellent price-performance ratio. Additionally, Angst+Pfister also offers optimal sealing solutions for highly specific applications. Angst+Pfister is constantly expanding its product range and is thus successfully meeting the continuously increasing demands with regards to media and temperature resistance.

Applications

  • Food and beverage industry
  • Process industry
  • Drinking water
  • Pharma, medical and healthcare
  • Chemical industry
  • General machine industry
  • Oil and gas
 

Product List

Product Image Description Technical data Approvals Key applications Order
                                       Material Colour

Hardness
(Shore A +/-5) 

Temperature (°C)
(short-term)
3-A Sanitary ACS/CLP ADI free AS/NZS BAM BfR Cognac by BNIC D.M. 06/04/04 n° 174 D.M. 21/03/1973 DVGW EN 681-1 DVGW W 270 DVGW W 534 DVGW 549 EC 1935/2004 FDA French Arreté GB 4806.11 GMC/RES N°28/99 KIWA for drinking water LFGB NSF 51 NSF 61 ÖNORM PAH Category UBA USP WRAS Food & beverage Process industry Drinking water Pharma, medical & healthcare Chemical industry General machine industry Oil & gas  
HITEC®
O-ring
EPDM
This EPDM seal with many approvals for drinking water and food has good media resistance to brake fluids, acids and alkalis, the flame-retardant hydraulic fluids HFC and HFD, and to hot water and steam - but is not resistant to mineral oils and greases or to petrol and hydrocarbons. EPDM black 70 -55 to +150 x x x x   x   x x x x x   x x x x x x   x x x 2 x x x x x x x        
FEP-O-SEAL®
O-ring
with VMQ solid-core
These seals ideally combine the elastic characteristics of elastomer o-rings and the chemical and thermal resistance of FEP. FEP-O-SEAL® O-Rings consist of two components: a seamless covering of FEP and a VMQ core that guarantees dimensional stability.   FEP / VMQ red-brown 85 to 90 -60 to +250 x   x                     x x                     x   x x   x x      
FEP-O-SEAL®
O-ring
with FKM solid-core
These seals ideally combine the elastic characteristics of elastomer r-rings and the chemical and thermal resistance of FEP. FEP-O-SEAL® O-Rings consist of two components: a seamless covering of FEP and a FKM core that guarantees dimensional stability.   FEP / FKM black 90 to 95 -15 to +200 x   x                     x x                     x     x   x x      
Perfluor
O-ring
FFKM
6221
Kalrez 6221 is a white, soot-free compound and was developed especially for the food and pharmaceutical industry with CIP and SIP capability. Lowest extraction values in all common media of these industries complete the broad chemical resistance.  FFKM white 70 -10 to +260 x   x                       x                     x     x   x x      
Perfluor
O-ring
FFKM
6230
Kalrez 6230 is a black compound and was developed especially for the food and pharmaceutical industry with CIP and SIP capability and  broad chemical resistance. FFKM black 75 -10 to +260 x   x                       x                     x     x   x x      
Perfluor
O-ring
FFKM
4079
Kalrez 4079 is a black, soot-filled compound and a reliable sealing material for the chemical industry. This compound has been specially developed for high temperature applications.  FFKM black 75 -10 to +316     x                                                 x x   x x      
Perfluor
O-ring
FFKM
6375
Kalrez 6375 offers outstanding performance in contact with a wide range of chemicals and over a wide temperature range. The product is an excellent choice for applications in acids, alkalis, amines, steam, ethylene oxide and many other aggressive chemicals, and is also suitable for mixed flows, which used to be a problem for the chemical industry. FFKM black 75 -20 to +275     x                                                 x x   x x      
PERTEC®
O-ring
CIP FKM
75 ShA
PERTEC® CIP FKM was developed for the use wherever the cleaning in place (CIP) or sterilization in place (SIP) method applies. It has a broad resistance to chemicals, cleaning medias and also to high temperatures and fat concentration. PERTEC® CIP FKM complies with all the required regulations for the food, pharma and medical industry. It is a compound with low friction for dynamic applications. FKM sky blue 75 -15 to +200 x   x     x x   x         x x x x     x x     1   x   x x   x x x    
HITEC®
O-ring
FKM
This HITEC® FKM has a very good resistance to media, ozone and ageing and the compound is specially designed for food, gas an pharmaceutical applications. The material is also resistant to fuels, mineral oils and greases as well as aliphatic and aromatic hydrocarbons. FKM black 70 -25 to +200     x   x x     x       x x x x x             2   x   x x   x x x x  
NORMATEC®
O-ring
FKM
75 ShA
Standard FKM with a very good resistance to media, ozone and ageing. The material is also resistant to fuels, mineral oils and greases as well as aliphatic and aromatic hydrocarbons. FKM black 75 -20 to +200     x                                         3               x x    
NORMATEC®
O-ring
FKM
70 ShA
green
Standard green FKM with a very good resistance to media, ozone and ageing. The material is also resistant to fuels, mineral oils and greases as well as aliphatic and aromatic hydrocarbons. FKM green 73 -15 to +200     x                                         1               x x    
HITEC®
O-ring
NBR
70 ShA
High-quality NBR material with approvals in the food and beverage industry and for gas applications. This NBR material also has a high resistance to mineral oils and fats, water and glycols. NBR black 70 -20 to +125   x x         x x     x x x x   x         x   2                 x x  
NORMATEC®
O-ring
NBR
60 ShA
Softer standard NBR with good resistance to mineral oils and fats, water and glycols. NBR black 60 -30 to +100
(130)
    x                                         2                 x    
NORMATEC®
O-ring
NBR
70 ShA
Standard NBR with good resistance to mineral oils and fats, water and glycols. NBR black 70 -30 to +100
(130)
    x                                         3                 x    
NORMATEC®
O-ring
NBR 90
ShA
Harder standard NBR with good resistance to mineral oils and fats, water and glycols. NBR black 90 -30 to +100
(130)
    x                                         3                 x x  
HITEC®
O-ring
VMQ
Silicone elastomerwith good mechanical properties over a wide temperature range. This compound is resistant in hot air and ozone, in water, in animal and vegetable oils and fats.  VMQ red-brown   -55 to +200
(230)
x   x           x       x x x   x             1   x   x x x x x x x  
X-Rings
NBR
As an alternative to the standard O-ring, the X-Ring has an X-shaped cross-section and is used in a wide range of static and dynamic applications. Its shape offers high sealing efficiency and lower friction than conventional O-rings. The standard NBR offers good resistance to mineral oils and fats, water and glycols. NBR black 70 -30 to +100     x                                                           x    

O-rings made of high-performance materials

O-rings from our high-performance range meet the highest demands of sealing performance and are characterised by exceptional chemical and thermal resistance. 

 

Kalrez® perfluoro elastomers (FFKM)

Where conventional materials fail, Kalrez® perfluoro elastomers (FFKM) represent the most cost-effective and reliable solution in the long-term with regards to total cost. They have a unique application behaviour not matched by any other elastomer material! Kalrez® synthetic rubber in the various compounds combines the elasticity and sealing force of a genuine elastomer with the chemical resistance of PTFE. 

Kalrez® O-rings are resistant to almost all chemicals and can be used at temperatures of +350°C for short periods or +327°C in continuous operation. They are also available with FDA or USP VI approvals. As an authorized distributor of DuPont Performance Polymers, Angst+Pfister has a wide range of Kalrez® O-rings and has direct access to special dimensions. 

Kalrez® O-rings (FFKM) are mainly used in the process industry, pharmaceutical industry, chemical industry, semiconductor technology and in the oil and gas industry.
 

PERTEC® – O-rings made of high-performance elastomers

Our PERTEC® O-rings are made from high-performance materials suitable for specific, particularly challenging industries and shine with properties such as high media resistance and numerous approvals.

The demands on high-performance materials for applications in various industries are becoming increasingly challenging. While the vacuum industry requires materials with low permeability and very good abrasion resistance, and the drilling oil industry high tensile strength and hardness, in the electronics industry low metal ion release is essential.

Our PERTEC® O-rings are also perfectly suited for use in CIP systems (Cleaning in Place) and SIP systems (Sterilization in Place), where a very high level of hygiene is essential for the application, as well as in the food, pharmaceutical, medical and chemical industries. 

Materials of the PERTEC® family are characterized by an above-average performance in terms of friction behavior, are extremely resistant to chemicals and steam, and have many approvals for almost all core industries. In order to stay competitive, we continuously adapt the product range to the latest technologies and challenges.

 

FEP-O-SEAL® O-rings

The FEP-O-SEAL® seals ideally combine the elastic characteristics of elastomer O-rings and the chemical resistance of FEP or PFA. FEP-O-SEAL® O-rings consist of two components: a seamless covering of FEP or PFA (1) and an elastomer core (2) that guarantees dimensional stability. 

There are numerous applications where the use of traditional elastomers causes failure. Aggressive chemicals or extreme temperatures can destroy conventional elastomer O-rings which can ultimately lead to leakage. FEP-O-SEAL® O-rings are therefore used in a wide variety of applications in many industry sectors, but in particular, where ordinary elastomers fail due to these aggressive fluids, like the chemical industry, petrochemical industry, foodstuffs industry, pharmaceuticals, mechanical seals and filtration industries.

FEP-O-SEAL® O-rings are pressure resistant and guarantee a deep compression set with much lower cold flow compared to PTFE. 

For static sealing points, such as flange connections in chemical apparatus engineering, non-elastic PTFE O-rings are the first choice when it comes to universal, robust sealing against aggressive liquids. Media with temperatures from -270 to +980°C and at pressures of high vacuum up to 6800 bar can only be sealed perfectly with metal seals (O-rings and C-rings) – if necessary, with coating.

Our FEP encapsulated O-rings are available from stock with a core of VMQ or FKM. Further possibilities are available with a hollow core in the case of the elastomer and a spiral spring for extreme low temperatures.

 

HITEC® Precision O-rings

The HITEC® brand stands for O-rings that meet very high standards or fulfil approval and conformity requirements in the drinking water, pharmaceutical, food and gas sectors. HITEC® O-rings are only manufactured in one defined factory and all materials have a clearly defined formulation. 

 

NORMATEC® O-rings  

The NORMATEC® O-ring range comprises O-rings of good industrial quality that meet standard requirements. As quality sealing elements, NORMATEC® O-rings are specially designed for high-volume applications: An efficient network of modern and rationally producing manufacturers in Europe and Asia results in a very good price/performance ratio. Depending on the quality and required dimensions, several manufacturers are approved to produce NORMATEC® O-rings according to Angst+Pfister's product specifications.

 

Precision O-rings

Special procurements or modifications based on the various qualities of the standard range open up the possibility of offering individual, project-related solutions with precision O-rings: Angst+Pfister has access to a large mould tool park that allows us to deliver even unusual dimensions on time. If required, Angst+Pfister will procure special materials or materials developed specifically for the customer. 

Surface finishes serve to facilitate assembly or enable the (partially) dynamic use of O-rings that are generally used statically. To reduce friction or improve separation, surface coatings or treatments can be considered. In addition, O-rings can be coated with PTFE in all colours for clear identification of the materials during assembly. 

 

Other special O-rings:

• End vulcanized round cord rings – available in any dimension at short notice
• XL O-rings – in large dimensions with a very high-quality standard regarding surface finish and tolerances
• X-rings – four-lip seal as an alternative to O-rings
• Back-up rings – prevent the O-ring from entering the sealing gap

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