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ISO

9001

EN29

001

Reg-N

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1100

1-01

WEY® Knife Gate Valve Type MG 2.5.00

Features

The cushioned cylinderprevents pressure shocksand initiates flushing

4-post heavy dutysolid steel topwork

Flange raised face;EN558-1 Series 20face-to face

Gate surface ground on 4-sides provideslong-life high perfor-mance sealing

All stainless steelvalve bolting

Threaded lugs permit easy instal-lation and by using all flangescrews, valve is suitable for dead-end-service at full pressure

Unique transverseseal eliminates stuff-ing box and com-pensates for wear

Gate guided forfull length ofstroke to insure«flutter-free»operation

Pigable enlarged bore reducespressure drop. Unique self-cleaning bore configurationprevents high solids contentslurries and dry solids frompacking in seat area

Seat mechani-cally retainedto prevent«pull-out»

Gate 60° arc geometry preventsjamming during closure becausesolids are pushed ahead by thegate into enlarged flushing corners

High strength clevisor stemnut for longlasting performance

Design options

Powder gate design witha scraper edge andsharpened face to cutthrough sticky medium

Flush port connectionsfor body corners and/orchest area; isolating bar-rier between transverseseal;both options forsevere service conditions

Deflector cone to protectbody and seal fromsolids build-up

Chest and guide liner for increased cycle life and reduced operatingforce in severe servicecondition

Double transverse sealfor extremely severeservice condition

V-Notch insert for flowreglation

Wear ring in Ni-Hard orPolyurethane to prodectbody and seal fromabrasion

Gas-tight bonnet instainless steel for max.pressur 0,5bar

Safety guard in stainless-steel according tomachinery directive no98/37EC

Test Pressure

Valves are tested accor-ding to DIN3230 Part 3BA/BN Leakage rate 1

Face-to-face dimension

Valves are designed toEN558-1 Series 20 (K1DIN 3202 or ISO5752 ba-sic series 20)

SISTAG coating

All steel parts are coatedwith type SL 25550, 2-componend primer/topepoxy coat 100µ RAL7030

PED (Pressure Equipment Directive No 97/23/EC)

All equipment with a pressure of > 0,5bar is subject toPED. Furthermore the directive is distinguish betweengas & liquid and daguerous fluids.The type MG standard design is meeting:– DN50 – DN300 acc.to Classificacion Art. 3– DN350 – larger acc. to Category I– Option: For Cat.II & Cad.III please refer to factory

ATEX (Atmosphere Explosible Directive 94/9/EC)

The directive prescribes the basic safety requirementsfor electrical and non-electrical mechanical equipmentand protection systems, which are installed in a hazar-dous area.Option: The type MG can be supplied according to Ca-tegory 3 G/D and for Cadegory 2 G/D refer to factory

Seat Type

Flange connection EN 1092 (DIN 2501)

Size Material Flange 2) Max. Working Standart MaterialPressure (bar) Body/Gate

50 – 600 Stainless steel PN16 16 bar 316SS/DuplexPN16 10 bar 316SS/316L

250 – 600 1) Ductile Iron PN16 16 bar D.I. /DuplexPN16 10 bar D.I. /304SS

1) Size 50 – 200 is covered by the type MF2) Flage can be drilled acc. PN10 or for most sizes acc. ANSI 150 lbs.

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Gat

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ate

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Material

NBR, PUR max. temp. 80°CEPDM, Hytrel max. temp. 120°CFPM, Aflas max. temp. 180°CPTFE max. temp. 220°CCeramic cord max. temp. 400°C 1)

1) For powder, waste gas and pellets atatmospheric pressure condition

Temperature/Pressure Chart

Pre

ssu

re [

bar]

17

16

15

14

13

12

11

10

Temperature [C°]

50 100 150 200

KV/CV Value Typ MG

DN KV* CV*mm/inch m3/h USgal/min50/2 1460 169080/3 3730 4330100/4 5840 6770150/6 13200 15300200/8 23300 27000250/10 36500 42300300/12 52500 60900350/14 71500 82900400/16 93400 108300500/20 146000 199400600/24 210000 243600

* The CV-Value is the flow of water (m3/h) at apressure drop of 1 bar (USgal/min at 1 PSI).

Pneumatic cylinder sizing

DN Cylinder- Selected cylinder [mm]sizing Valve differential pressure [bar]

[mm] [bar] 1 2.5 4 6 8 10 12 168 100 100 100 100 100 100 100 100

50 6 100 100 100 100 100 100 100 1005 100 100 100 100 100 100 100 1004 100 100 100 100 100 100 100 1608 100 100 100 100 100 100 100 160

80 6 100 100 100 100 100 100 160 1605 100 100 100 100 100 160 160 1604 100 100 100 100 160 160 160 1608 100 100 100 100 100 100 160 160

100 6 100 100 100 100 160 160 160 1605 100 100 100 160 160 160 160 1604 100 100 160 160 160 160 160 2008 100 100 100 160 160 160 160 200

150 6 100 100 160 160 160 160 200 2005 100 160 160 160 160 200 200 2504 160 160 160 160 200 200 250 2508 100 100 160 160 160 160 200 200

200 6 100 160 160 160 200 200 250 2505 160 160 160 200 200 250 250 3004 160 160 160 200 250 250 250 3008 160 160 160 160 200 200 250 250

250 6 160 160 160 200 200 250 250 3005 160 160 200 200 250 250 300 3504 160 200 200 250 250 300 300 3508 160 160 160 200 250 250 250 300

300 6 160 160 200 250 250 300 300 3505 160 200 200 250 300 300 350 4004 160 200 250 250 300 350 350 4008 200 200 200 200 250 300 300 350

350 6 200 200 200 250 300 300 350 4005 200 200 250 300 300 350 400 4504 200 250 250 300 350 400 400 5008 200 200 200 250 300 300 350 400

400 6 200 200 250 250 300 350 400 4505 200 200 250 300 350 400 400 4504 200 250 300 350 400 400 450 5008 250 250 250 300 350 400 400 450

500 6 250 250 300 350 400 450 450 6005 250 250 300 400 450 450 500 6004 250 300 350 400 500 600 600 6508 250 250 300 350 400 450 500 600

600 6 250 300 350 400 450 500 600 6505 250 300 350 450 500 600 600 7504 250 350 400 500 600 600 750

–– EN-JS1030 (Ductil Iron)–– 1.4408 (316SS)

Material List

Item Part Material1 Body EN-JS1030 1.44082 Gate 1.4404 1.44623 Seal NBR4 Hex screw A4.705 Hex screw A4.706 Hex nut A47 Cylinder head screw A4.708 Washer A4

10 Post Steel V4A11 Yoke plate Al V4A12 Clevis Steel V4A13 Connex pin 1.8159 galv.14 Hex screw A4.7015 Hex nut A416 Hex screw A4.7017 Hex screw A4.7018 Hex nut A4

C01 Piston rod 1.4104 1.4404C02 Cylinder tube AlC03 Tie rod 1.4404

Item Part MaterialC1 Cylinder bottom AlC2 Cylinder top AlC3 Piston AlC10 Hex nut A4C11 Cap nut A4C14 Piston seal NBR80C15 Piston rod seal PURC16 Damping ring NBR70C17 Seal cord NBR70C18 O-Ring NBR70

A1 Stem 1.4104 1.4404A2 Stem ring 1.4104 BrassA4 Handweel SteelA5 Yoke plate Steel V4AA6 Stem nut BrassA7 Hex screw A4.70A8 Hex screw A4.70A9 Hex nut A4A10 Split pin A2.70A11 Friction washer POMA12 Connex pin 1.8159 galv.

Optional material construction

For severe applications SISTAG is offering next to special cast matreials various material treatment such as chromeplating, hardening, plasmanitrating, anti-stick teflon coat type CC2011.

Pulp and Paper Industry

Coal Fired Power Station

Off-Shore

Highly contanimated Liquids

Further products

Production MG

Sluice Gates Off-center ButterflyValves

Check Valves (dirtywater)

Check Valves (cleanwater)

Centric Butterfly Valves Dismantling pieces

4.05

/200

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Zepf

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f ASWSISTAG A b s p e r r t e c h n i k

CH-6274 EschenbachS w i t z e r l a n dPhone ++41 41 449 99 44Fax ++41 41 448 34 31i n f o @ s i s t a g . c hw w w . s i s t a g . c o m