stafsjo knife gate valves

8/19/2019 Stafsjo Knife Gate Valves

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K n i f e g a t e v a l v e s f o r p u l p ,

r e j e c t a n d w a s t e

V

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Trust your instinctexpect the bestStafsjö serves the international Pulp and Paper industry with high qualityvalves. 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 becamea 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 Groupwhich 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 inthe 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 sometimesdemands 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 youbuy knife gate valves from Stafsjö – you ensure your production thanks

to products that comply with the strictest quality requirements on themarket. 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 andsupport from us directly or from our sales partners.

We strive to be the most accessible, reliable and cost-effective

supplier of knife gate valves.


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Product range optimized through decades

Our 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 ofhigh 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 touphold 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

TwinPack TM is designed to providea 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.


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MPDN 350 - DN 800

In 1928 our knife gate valve manufacturing started in close co-operationwith 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 drivenrequirements 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 isan 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 features

The 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 sealingand 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 operationreliability. The gland box is also machined for maximum finish and thighttolerances.

The valve has guiding pads in order to support and guide the gate fromDN 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 containsgate support cams.

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


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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 ismodular designed and it can easilly be customized.

It comes in either one or a two piece valve body depending on valvesize. 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 optimizingit 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


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HL, HG, HP and HPTDN 80 - DN 1000

These are reliable valves for pulp concentrations up to 18% and also forother difficult duties where there is a risk for clogging. The valves are

bi-directional and has a through-going gate to assure closure throughstatic 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 securesealing where the gate exit the valve body and assures that no media

reaches surrounding environment.

D2GDN 100 - DN 700For 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

towerInlet

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 concentrationsup 18%.

Primary

screening

Reject

D2GD2G can also be used in a

junk trap for coarse reject.Accept

D2GRapid closing valve on return to pulper.

Inlet

Return to pulper


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RKODN 100 - DN 700

The RKO valve is reliable and particularly well suited for really demandingreject 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 hardchromed 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 optimaloperating 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 rejecttank 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

RKO

Accept

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

Accept

Inlet

Reject RKO

Primary

screening


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S t a f s j ö 2

0 1 1 - 0 5 - 0 6

: 031 579-2593: 031 579-2562: [email protected]

TelFaxE-mail

DURBAN

: 011 397-2833: 011 397-4700: [email protected]

TelFaxE-mail

JOHANNESBURG

: 083 320-0393: 083 227-7722: 083 321-4960: 083 656-4254 /

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TECHNICAL SALES & SUPPORT

stafsjo knife gate valves

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