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Trust your instinct expect the bestStafsjö serves the international Pulp and Paper industry with high quality valves. Superior quality, excellent reliability and low life cycle cost are some benefits to be expected from valves carrying Stafsjö’s name.

Stafsjö was founded in 1666 and is today one of Sweden’s oldest works still operating. The production started with cannons and it became a nearly 200 year long tradition. The production of knife gate valves started in 1928 in close co-operation with the near-by pulp & paper mills. Since 2005 Stafsjö is part of the German family owned Bröer Group which also consist of Ebro Armaturen – a leading supplier of butterfly valves, pneumatic and electric actuators.

A large proportion of our resources are devoted to research and de-velopment of new products. Thanks to close contacts with pioneers in the process industry, we are able to meet new needs and requirements as they arise. Changing conditions call for fresh thinking, aggressive en-vironments require high performance and unusual problems sometimes demands unusual solutions. Excellence and flexibility is a big part of our job and you should expect nothing less.

We have quality certification in accordance with several different stand-ards. Since 1993 we have been ISO certified, currently in accordance with ISO 9001-2008. We are certified in accordance with the European Pressure Equipment Directive (PED), which is a recognition of our ambitious quality efforts and technical competence. This means that you as a customer receive more than functionality and knowledge when you buy knife gate valves from Stafsjö – you ensure your production thanks to products that comply with the strictest quality requirements on the market. And, not to forget, you ensure the safety of your personnel.

Globally active and locally comittedWith flexible production, on-time deliveries and local market oriented stocks at our partners worldwide we can quickly and safely deliver what you need. Besides this you should also expect high quality service and support from us directly or from our sales partners.

We strive to be the most accessible, reliable and cost-effective supplier of knife gate valves.

Product range optimized through decadesOur product range consist of 20 different models available in sizes ranging from DN 50 up to DN 1600. We have valves in stainless steel, cast iron or nodular iron, but we also have capacity to supply valves in a range of high alloy materials such as Duplex, Hastelloy, SMO and Titanium. All the valves are built up by modules and each can be customized with material, actuator type and accessories. Some models are also available in different pressure classes. Fully modular design also makes it easy to uphold flexibility and first-rate operation year after year.

Pressure classes

Maximum working pressure body at 20°C Maximum differential pressure at 20°C

DN MP MV XV HL HG HP HPT RKO D2G JT DN MP MV XV HL HG HP HPT RKO D2G JT

50 - 16 - - - - - - - - 50 - 16 - - - - - - - -

65 - 16 - - - - - - - - 65 - 16 - - - - - - - -

80 - 16 16 - 10 - 10 - - - 80 - 16 10 - 10 - 10 - - -

100 - 16 16 - 10 - 10 10 10 6 100 - 16 10 - 10 - 10 6,2 10 6

125 - 16 16 - 10 - 10 - 10 - 125 - 16 10 - 10 - 10 - 10 -

150 - 10 16 - 10 - 10 10 10 6 150 - 10 10 - 10 - 10 6,2 10 6

200 - 10 10 - 10 - 10 10 10 - 200 - 10 10 - 10 - 10 6,2 10 -

250 - 10 10 - 10 - 10 10 10 - 250 - 10 10 - 10 - 10 6,2 10 -

300 - 10 10 - 6 10 10 10 10 - 300 - 10 10 - 6 10 10 6,2 10 -

350 6 6 10 - 6 10 10 10 10 - 350 6 6 10 - 6 10 10 6,2 10 -

400 6 6 10 6 6 10 10 10 10 - 400 6 6 6 6 6 10 10 6,2 10 -

450 5 6 10 OR 6 10 10 10 6 - 450 5 6 6 OR 6 10 10 6,2 6 -

500 4 6 10 4 6 10 10 6 6 - 500 4 6 6 4 6 10 10 4 6 -

600 4 6 10 4 6 10 10 6 6 - 600 4 6 6 4 6 10 10 4 6 -

700 2 4 6 4 6 10 OR OR 6 - 700 2 4 4 4 6 10 OR OR 6 -

800 2 4 6 4 6 10 OR OR OR - 800 2 4 4 4 6 10 OR OR OR -

900 OR 4 OR OR OR 6 OR OR OR - 900 OR 4 OR OR OR 6 OR OR OR -

> 1000 OR OR OR OR OR OR OR OR OR - > 1000 OR OR OR OR OR OR OR OR OR -

Stafsjö’s unique gland box packing TwinPackTM is designed to provide a tight and reliable seal around the gate. This is our standard packing.

The retainer ring system makes maintenance smooth and cost-efficient and it can be combined with several seat materials.

MPDN 350 - DN 800

In 1928 our knife gate valve manufacturing started in close co-operation with nearby pulp and paper mills. Now it is time for the eighth knife gate valve generation, the MP, which is an assembled result of market driven requirements and experienced engineering throughout the years.

The MP is a bi-directional valve in stainless steel with a preferred pressure direction. It has a one piece body design. Just like MV this is an all-round valve – a Multi Purpose valve – to be used in different types of applications and the MP’s sealing capacity further extends its field of applications.

MP featuresThe gate has a bevel edge that effectively cuts through the pulp. This process is facilitated by the inner cavity of the valve body. In closed position the gate is pushed against the seat which gives a secure sealing and on the opposite side the gate support is positioned to create a bi-directional sealing.

The top work consists of aluminum beams and stainless steel tie rods which gives good corrosion resistance and stability at manoeuvring. All remote operated valves are supplied with gate guards in stainless steel.

The gland box is optimized with three layers of our TwinPackTM and a box bottom scraper to give a tight sealing and to assure high operation reliability. The gland box is also machined for maximum finish and thight tolerances.

The valve has guiding pads in order to support and guide the gate from DN 450.

For operation reliability in applications with corrosive or clogging media the valve comes with integrated purge ports as standard.

The valve is equipped with gate support for bi-directional sealing. This support is available in different material in order to customize it to specific process conditions. The inner cavity of the body also contains gate support cams.

MP is supplied with the retainer ring which can be combined with several seat materials. It also offers smooth and cost-efficient maintenance.

XVDN 50 - DN 1000

This compact bi-directional (double seated) valve resists high differential pressures. It comes in stainless steel and either as semi lugged or as full lugged. It has the TwinPackTM and the retainer ring system as standard. Reduced cavities gives good flow characteristics.

MVDN 50 - DN 1400

This is a true allround valve used in many types of applications. It is modular designed and it can easilly be customized.

It comes in either one or a two piece valve body depending on valve size. As standard MV is supplied in stainless steel or nodular iron, but it can also be supplied in range of high alloy materials such as Titanium, Hastelloy and SMO. MV has the retainer ring system which makes it possible to supply it with many types of seat materials, thus optimizing it to specific process conditions. The retainer ring can also be replaced with a V-port for control duties.

XV

MV

MV

Isolation valve before and/or after

MV

MV

RKO

Junk trap, inlet and accept.

Isolation pump between pump and tower where bi-directional sealing is required.

HD cleaner, inlet and accept.XV XV

XV

XV

RKO

HL, HG, HP and HPTDN 80 - DN 1000

These are reliable valves for pulp concentrations up to 18% and also for other difficult duties where there is a risk for clogging. The valves are bi-directional and has a through-going gate to assure closure through static media.

HL is the slim line version of our well known HG and HP is a high pressure version of HG. HPT is entirely made in Titanium and offers outstanding corrosion resistance.

All versions has a two piece valve body with purge ports and integrated guiding pads. PTFE body gaskets gives a secure sealing between the body halves and Stafsjö’s unique gland box packing, TwinPack™, gives a secure sealing where the gate exit the valve body and assures that no media reaches surrounding environment.

D2GDN 100 - DN 700

For contaminated pulp or reject handling which requires full bore and ex-tremly fast manouvring, this D2G valve is an excellent choice. The valve is designed of a two piece valve body in stainless steel with unique sli-ding faces positioned between the gate and housing halves in order to minimize friction. D2G is equipped with two hard chromed gates working towards each other in the bore for fast opening/closure.

HL, HG, HP or HPT

MV, MP or XV

Titanium valveOutlet to bleaching tower

Inlet

Mixer/Pump

On-Off valve at mixer/pump, manufactured in Titanium or Hastelloy C depending on media.

Discharge valve for pulp tower with high pulp concentrations up 18%.

Primary

screening

RejectD2GD2G can also be used in ajunk trap for coarse reject.Accept

D2GRapid closing valve on return to pulper.

Inlet

Return to pulper

RKODN 100 - DN 700

The RKO valve is reliable and particularly well suited for really demanding reject and other abrasive waste. The valve has a circular inlet and a square outlet and the gate has a rectangular shape and a bevel edge. This special shut-off design prevent it from clogging, which often is a problem in combination with junk traps, coarse reject and cleaners.

RKO comes in a robust two piece valve body in cast iron or stainless steel with integrated purge ports. As standard it is supplied with a hard chromed gate in Duplex stainless steel, exchangeable guide strips, TwinPackTM and the retainer ring system. For the toughest process conditions, the valve can also be supplied with double gland for optimal operating performance. If needed, the valve can be supplied with an adaptor cone on the square side for welding connection or for connection to a circular flange.

JTDN 100 - DN150/DN 250

As a complete Junk Trap, the JT is an excellent choice. It consist of a standard RKO on the inlet side and specially designed valve called JTV on the outlet side. In between the valves is a specially designed reject tank installed. The tank has flush connections for water or air and sight glasses for inspection. All parts are designed and optimized for the most extreme process conditions.

Return to pulper D2G

Reject

Inlet

RKOAccept

As upper and lower valve on coarse reject. As upper and lower valve on junk trap.

Accept

Inlet

Reject RKO

Primary

screening

Staf

sjö

2011

-05-

06

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