Dredge Yard Gate Valve Brochure

Dredge Valve

DREDGE YARD products are designed by using thelatest CAD technologies, latest productionmethods and testing facilities worldwide. Inaddition, all designs are entirely scrutinized usingFinite Element Analysis.

Dredge Yard valves are designed, produced andtested under strict ISO and ASTM standards andat third party for verification.

All dredge valves are designed, produced, assembled, tested, painted, greased, packed and transported underclose super vision of DREDGE YARD team of engineers and quality control.

Dredge Valve Features

The dredge valve is designed in such a way that there are no fasteners inside the body

Dredge valve is made of fabricated high tensile steel and cast steel

The dredge valve gate is made of corrosion resistant and hard steel

All dredge valves are operated by hydraulic cylinder located on the top of the dredge valve

The dredge valve body is stiffened with T-bars

The dredge valve body is is provided with inspection holes on both sides

Steel reinforced rubber seals are used to seal the pipe when the gate is down

Seals can be used both sides and turned in opposite direction when worn out

The rubber seals are hardened where necessary to increase the life time of the seals

All connections outside the body are bolts and nuts

The fabricated body is made from high tensile steel

Two flushing pipes are provided in the lower body of the dredge valve

Hoisting lugs are provided on the top of the body

United Arab EmiratesTel: +971-44574002Fax: +971-44356489Fortune Executive Tower Office 305Block T, JLT, P.O.Box 282189, Dubai

The NetherlandsTel: +31-70-7709038Fax: +31-70-7709039Platinastraat 72718 SZ Zoetermeer

http://www.dredgeyard.com

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The dredge valves are designed in 3 different working duties varies between 10, 20 and 30 bar.

Dredge Valve Benefits




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No fasteners inside the dredge valve that can loosen and

damage other parts during operation

Corrosion resistant and hard dredge valve gate ensures longer

life time

Steel reinforced rubber seals hardened at both ends to

ensure long life time and interchangeable in all directions

All connections outside the dredge valve body are bolts

and nuts that can be easy replaced without damaging any part

of the body

Compact design due to the use of high tensile steel

Inspection hole allows easy inspection without dismantling the

dredge valve body

Different duties being 10, 20 and 30 bar to fit the right

application

The dredge valve can be delivered with visual and digital

position indicator

Easy handling and installation due to hosting lugs andcompact design

Dredge Valve Materials

Dredge valve body is made of high tensile carbon steel

Dredge valve gate is made out of corrosion resistant and hard steel

The seals are made from steel reinforced rubber hardened at both ends

Lower body is made out of cast carbon steel

To ensure a heavy duty design for obtaining a high reliability and efficiency performance the dredge valve aremade out of the following materials:

Dredge Valve Production




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All dredge valves are designed according to the customers requirements and applications using 3D

CAD technologies

The design is tested by Dredge Yard experts using Finite Element Analysis. External and internal forces

are examined and all maximum possible scenarios are simulated

Before making the pattern, casting simulation software is run to verify that all thickness, curves and radii

will be obtained and the material will cool down in a good way preventing internal and external shrinkages

The patterns are made from aluminum or wood depending on the quantities

Casting is done in a clean and supervised environment. All necessary measurements are taken to ob-

tain a good casting like using filters, special cast ladles, and strong paint for the mold surface

All castings of dredge valves are heat treated according ISO and ASTM standards

For all casting the mechanical and chemical properties are verified at third party

After casting and after machining Dredge Yard team of quality control inspects all the parts to make sure

that the quality will be according to customers and Dredge Yards specifications

After approval of the products, the cast surface is painted and the machined surfaces are greased

The packing and transport is done under the supervision of Dredge Yard team to ensure the release of

products in the right way

Dredge ValveQuality ControlThe following testing is done during and after production:

Chemical composition test at third party

Mechanical properties test at third party

Measurement test of all dimensions after casting

Ultra sonic testing for 20% of all surfaces

Magnetic particle tests for critical parts

Dye penetrant inspection for critical parts

Measurement test of all dimensions after machining

Surface roughness test for critical surfaces

Hardness test for all parts

Assembly test and interchangeability for all parts

Assembly test and interchangeability for all parts

Visual inspection for all parts

Dredge ValveAdditional Options

Dredge yard dredge valves can be delivered with thefollowing options:

Additional mechanical position indicator on the top

of the dredge valve

Proximity sensors attached to the hydraulic cylinder




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Dredge Valve Sizes

10 BAR WORKING PRESSUREPipe INSIDEDIAMETER

(mm)

FLANGE(mm)(O.D./P.C.D./H

OLE DIA.)

BOLT(mm)(QTY./SIZE) A(mm) B(mm) C(mm) D(mm)

250 395/350/22 12/M20 1437 870 435 182300 445/400/22 12/M20 1607 990 500 182350 505/460/22 16/M20 1797 1130 595 210400 565/515/26 16/M24 1992 1275 675 224450 615/565/26 20/M24 2172 1405 735 232500 670/620/26 20/M24 2300 1455 730 236550 745/680/30 20/M27 2428 1535 805 242600 780/725/30 24/M27 2640 1695 914 264650 845/780/30 24/M27 2480 1845 980 279700 895/840/30 24/M27 3035 1965 1040 310750 970/900/33 24/M27 3235 2115 1100 325800 1015/950/33 24/M30 3400 2230 1160 340850 1070/1000/33 28/M30 3605 2385 1245 367900 1115/1050/33 28/M30 3785 2515 1295 394950 1170/1120/33 28/M30 3960 2640 1396 409

1000 1230/1160/36 28/M33 4193 2805 1436 4401100 1345/1270/39 28/M33 4565 3075 1575 4701200 1455/1380/39 32/M36 4945 3357 1675 5261300 1575/1490/42 36/M39 5330 3640 1795 5561400 1675/1590/42 36/M39 5685 3880 1935 586

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Dredge Valve Sizes


(mm)


OLE DIA.)



1000 1320/1210/56 28/M52 4500 3110 1506 5401100 1455/1330/56 28/M52 4735 3245 1660 5601200 1590/1450/56 28/M52 5130 3540 1786 6001300 1725/1570/56 28/M52 5660 3970 1920 6301400 1860/1690/56 28/M52 5933 4128 2116 660


(mm)


OLE DIA.)



1000 1230/1160/36 28/M33 4215 2825 1440 4701100 1345/1270/39 28/M33 4598 3108 1575 4961200 1455/1380/39 32/M36 4970 3380 1675 5521300 1575/1490/42 36/M39 5346 3656 1795 5821400 1675/1590/42 36/M39 5703 3898 1935 586

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Dredge Yard Gate Valve Brochure