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Stafsjö introduce FEPM seat for high temp and chemical services

We are proud to announce the arrival of our new rubber valve seat compound FEPM to WB11, WB14 and specifically to the full stainless steel high performance WB14E. Initially we release it for DN 80/3” - DN 300/12” except for DN 125/5”.

The FEPM seat material has excellent resistance to wide range of aggressive chemicals, both acids and bases, and steam at high continuous service temperatures within -10 °C/14 °F up to 180°C/356 °F including short term peeks up to + 225 °C/437 °F. The compression set resistance at these high temperatures is superior to other standard rubber materials, but it is limited in low temperature applications. Function tests shows that the FEPM material can give the sealing system considerably longer life time compared to standard rubber compounds. This makes the FEPM seat suitable for severe applications where you need a long-lasting performance and a tight shut-off.

Contact us on for an inquiry!

Stafsjö introduce a new hydraulic cylinder to its modular actuator range

This hydraulic cylinder is supplied by the Swedish manufacturer Ceson. It is a 200 bar rated cylinder supplied with stroke length, piston rod and ISO 5210 attachment customized for Stafsjö’s knife gate valves. Any rebuild of existing Stafsjö valves can easilly be performed on the field thanks to Stafsjö's modular actuator concept. 

The hydraulic cylinder can be supplied with Ø 32 mm up to 200 mm barrel with stroke lengths up to 1500 mm. It is coated in black RAL 9005 to fulfill the requirements of EN ISO 12944
class C3. It can operate in temperatures ranges from -20 °C to +80 °C.

 Other colours, coating systems, materials and special editions on request. Further information on hydraulic cylinder is available in the product data sheet: act-HC_EN



New Product Manager at Stafsjö

Oskar Rüdow has been appointed as our new Product Manager at Stafsjö as of June 1. He will also continue as our Engineering Manager. Oskar replaces Leif Jonsson who retired yesterday after 21 years with the company.

"In my position I will continue to rationalize our program to support our growth strategy, says Oskar. Our Engineering team will also continue to further develop our solution oriented product strategy and to dig deeper within our core business segments:

- Pulp and paper
- Water, waste water and biomass
- Mining and minerals
- Food and beverage
- Power
- Offshore

I want Stafsjö to be the global technology leader on the knife gate arena, acting responsively when requirements arrise from our customers. We have such a great knife gate range, a first rate manufacturing plant and a comitted team to bring out our solutions to our customers. I'm up for it", sumurizes Oskar. 

If you have any ideas or requirements you are always welcome to contact Oskar on


Stafsjö är inne i en kraftig tillväxtfas och våra kunder behöver leveranser året runt. Därför söker vi nu flertalet sommarjobbare till vår produktion och även utvecklingsavdelning.

Stafsjö utvecklar och tillverkar högpresterande skjutspjällsventiler för säker och långvarig användning i krävande industriella processer över hela världen. Vi tillhör den tyska koncernen Ebro Armaturen som utvecklar och tillverkar vridspjällsventiler med huvudkontor i Hagen.

Vi på Stafsjö har egen produktutveckling, tillverkning och försäljning vilket gör oss väldigt flexibla att anpassa oss till kundernas behov. Omsättningen är idag ca 205 MSEK och vi har kunder i alla världsdelar. Vi är ca 85 anställda varav ca 45 inom produktion.

Vi erbjuder längre sommarjobb, från mitten av juni t o m mitten av augusti, på förrådet, montaget, packen eller utvecklingsavdelningen. För att jobba i vår verkstad och förråd krävs att du är minst 18 år. Vi ser gärna att du har ”meckarvana” om du är intresserad av att jobba i vårt montage. Har du truckkort är det meriterande.

För er som vill sommarjobba på utvecklingsavdelningen ser vi gärna att du har ett stort intresse för teknik, grundläggande cad-kunskaper och är nyfiken. Under sommaren kommer du framförallt att stödja våra marknads- och säljfunktioner när det gäller att ta fram kundspecifika underlag och nya konstruktioner. Du arbetar tillsammans med erfarna konstruktörer och med moderna CAD-verktyg. Jobbet passar dig som studerar, är teknikintresserad och som i framtiden vill arbeta som mekanikkonstruktör.  

Vi erbjuder ett begränsat antal platser. Arbetstiden är dagtid. Är du intresserad så skicka in din ansökan på

Stafsjö support the Swedish Childhood Cancer Fund

In the 1970s, a minority of children diagnosed with cancer survived. These days over 80% do. But that’s not enough. Childhood cancer is still the most common cause of death in the ages 1–14. At Stafsjö we want to support their work to eradicate childhood cancer. If you also like to súpport, feel free to do so on

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Stafsjö introduce LINAK

Linak’s electric actuator is a compact maintenance free unit for on/off operations with a speed 7-11 mm/sec. It is available as standard in a 24 V DC version but it can also work on 230 V AC or 120 V AC if it is supplied with a control unit/transformer. The actuator unit features a solid stainless steel structure holding the actuator in excactly correct position during operation. It can be supplied on Stafsjö’s WB11, WB14, WB14E and MV knife gate valves from DN 50 (2”) up to DN 300 (12”).

Further information is available in the product data sheet... or on the product page...

If you have any questions, please contact us on

A new standard is on its way – the SC cylinder

During first and second quarter 2018 Stafsjö will introduce a new double-acting pneumatic cylinder manufactured by our collegues at Ebro Armaturen. It is a solid construction designed for tough knife gate applications available from 100 mm (4”) up to 320 mm (12.6”) bore diameter. The interface to valve adapter and gate clevis is the same as for the EC cylinder.

The SC cylinder has a hard anodized aluminium barrel with coated aluminium caps, hold strongly together by stainless steel tie rods to enable a long-term linear operation independent of position. The SC also include several internal and extended precision supports to further guarantee the linear stroke. A piston rod wiper in bottom end cap ensure that no material enter the cylinder.

The supply pressure for the cylinder should be max 10 bar and the compressed air should be dry or slightly oil misted. Temperature range for the actuator is -30 to +100 °C.

The SC cylinder is CE marked and also approved for use in EX areas according directive 2014/34/EU Group II category 2G/2D (zone 1 or 21).

Further information on the SC cylinder is available in the product data sheet, available to download from this page:

If you have any questions, please contact us on

From the entire Stafsjö team

Do you need a reliable bi-directional tight shut-off valve for highly concentrated media and static media columns?

Stafsjö’s HG and high pressure version HX features excellent flow characteristics and offers a really safe and reliable bi-directional tight shut-off on highly concentrated media and static media columns. This shut-off performance makes them especially suitable for severe services including pulp stock (pulp concentration <18%), liquor, reject, powder, ash and highly concentrated slurry. Read more and check out the new video on