Dev Precision Engineers

Jagnath Plot, Rajkot, Gujarat

We are one of the eminent valve guide manufacturers and suppliers in India, who manufacture and supply a wide range of valve guide. The valve guide offered by us is manufactured from optimum quality raw material, so as to ensure the quality & durability of the final product. We provide comprehensive range of quality engine valve guide, which can be used in different engines. We manufacture and supply a wide range of valve guides widely used for automobiles, tractors, industrial & diesel engines. We manufacture valve guide in various material depend on :-

• Customer requirement
• Type & Size of engine
• Engine R.P.M. & effort of engine

Their application where usedMaterial of Valve Guide as we use :-

• Copper zinc alloy
• Phosphorous Bronze and leaded bronze
• Manganese Bronze
• Aluminium Bronze (North American UNS C95400, German CuAI10Fe, British AB1) for high temperature applications.
• Gun Metal
• Alloy Graded Cast Iron of 25 & 30 Grade. This Cast Iron is specially made for High Racing Engine.
• Tin Bronze (North American UNS C90500, German CuSn10Zn, British G1) for piston airplane enginesCast Iron is a general term applied to a wide range of iron carbon alloys. Their carbon content is such as to cause some liquid of eutectic composition to solidify. The maximum carbon content is therefore about 2% while the practical maximum is about 4.3%Cast Iron should not be thought of as metal having single element. It should at least posses six elements. These are iron, carbon, silicon, manganese, phosphorus and sulphur.

Some of the important mechanical properties

• Brinell Hardness Number (b.h.n) = 150 to 225
• It is a brittle material.
• It cannot be beaten in sheets or rolled or forged. Hence it is not a malleable material

Various types of Cast Iron are as follows:

• Grey Cast Iron
• White Cast Iron
• Mottled Cast Iron
• Malleable Cast Iron
• Spheroidal Grey Iron (s.g.iron)
• Inoculated Cast Iron
• Alloy Cast Iron

Addition of nickel to cast iron produces fine grains, helps formation of graphite and prevents formation of white hard iron nickel & copper ensure an austenitic structure. Chromium and silicon add resistance to scaling. The microstructure of iron is stabilized and formation of fine graphite is promoted by the addition of chromium. The matrix of cast iron is strengthened through promotion of the fine pearlite by the addition of molybdenum.

Valves developed from CuZnAl-alloy & grey cast iron alloy with high phosphorous content to offer high wear resistance as well as improver the years working properties in poor lubrication conditions. The inner bore of these valve guides is finished to perfect size, not usually done by competitors.

CuZnAl-alloy Guides are with excellent wear resistance and low coefficient of friction. Used for highest stressed guides. While developing these valve guides, we pay care full attention to the accurate dimensions, so that they could meet with the OEM standards.

Our valve guide has hardness in range of 160 225 BHN. ValveGuide has microstructure of matrix pearlite with 5% free ferrite. We also provide thread or spiral in inner diameter of valve guide to retain oil for long time between valve and valve guide & increase life both. Our valve guide are grounded to a surface finish 0.80 micro ra value on its outer dia & maintain outer diameter within tolerance of 12 microns. Our valve guide has Super Finish Bore.

Description:

• Cylinder Liner for Bukh DV10 DV20 DV24, DV24 ME, DV24 RME, DV29, DV29 ME, DV29 RME, DV32, DV32 ME, DV32 RME.
• A high quality replacement Parts for Marine diesel Engine.
• Cylinder Liner / Cylinderforing / Zylinderlaufbuchse Part No DEV 41561 Or Pt No DEV 000E1561 1 Pc
• O-Ring PN DEV 560F0011 2 Pc
• We Are also offering separately Piston, ring, pin and Cerclip sets

Description:

• Cylinder Liner for Bukh DV10 DV20 DV24, DV24 ME, DV24 RME, DV29, DV29 ME, DV29 RME, DV32, DV32 ME, DV32 RME
• A high quality replacement Parts for Marine diesel Engine
• Cylinder Liner / Cylinderforing / Zylinderlaufbuchse Part No DEV 41561 Or Pt No DEV 000E1561  – 1 Pc
• O-Ring PN DEV 560F0011  – 2 Pc
• We Are also offering separately Piston, ring, pin and Cerclip sets

Description:

• Cylinder Liner or  Cylinderforing or Zylinderlaufbuchse Part No DEV 41561 Or DEV 000E1561.
• A high quality replacement Cylinder Liner for Bukh DV10 DV20 DV24, DV24 ME, DV24 RME, DV29, DV29 ME, DV29 RME, DV32, DV32 ME, DV32 RME.
• We Are also offering separately Piston, ring, pin and Cerclip sets.

Description:

• We Are also offering Piston, ring, pin and Cerclip set. Piston P/n 573-10430 and Ring set Pt. No 574-10980 Please buy it separately so that whole assembly is complete
• We are offering Lister 9/1, JP, Cylinder Liner Part No – DEV 010-02247 and  O-Ring Set Pt No  DEV – 010-02-116.
• Lister 9/1 & JP Cylinder Liner with O-Ring Set.
• A standard cast iron Cylinder Liner for use in Lister 9/1 & JP Series engines, comes complete with O Ring Sets.
• For Lister 9/1 JP JP2 JP3 JP4 & JP6 standard Bore 4.5″ / 114.30mm.

Description:

• PISTON ASSEMBLY Comprising DEV - 570-11308 1  PISTON DEV - 544009 2 PISTON RING SET Comprising  DEV - 570-12120 3  GUDGEON PIN 4 CIRCLIP  2 Pc   80420 Please buy it separately.
• We are pleased to offer Graded cast iron Cylinder Block / Barrel of standard Size Fits all Lister Petter LR Series engines,
• Item does not include Lister LR PISTON ASSEMBLY DEV – 570-11308.
• Please buy it separately.
• Lister LR1 LR2 Cylinder Barrel or Block Bare DEV 201-70110 LR without piston kit.
• Widely used as Stationary and Industrial engines of single or Twin Cylinder LR1 & LR2.

Description:

• We are pleased to offer a quality cast new replacement Cylinder Bock.
• Please select the correct quantity for your engine.
• Piston Assembly Pt No DEV 570-10940 is not included in the offer.
• Widely used as Stationary, Marine and Industrial engines of single or Multi Cylinder SR1, SR2, SR3 and SR4 Air Cooled Engine.
• Lister SR Cylinder Barrel PN 201-50632.
• Cylinder Bock suitable for SR Engine standard Bore 88.90 mm or 3.500″ or  3 1/2 inch.

Besides These We can also supply following Parts : Connecting rod bearing shells, - 40563 / 000E 0563(Standard / Under Size) DV20 / DV36 Big End Bearings / Plejlstangspander, sæt / Pleuellager, Satz Main bearing liner - 000E 4765 / 000E4765(Standard / Under Size)DV36 Hovedlejeforing, standard  Hauptlager, Laufbuchse DV20 Cylinder head gasket - DEV 000E7766 -  1 Pc (Old Part No - DEV 000D9687)

Description:

• Bukh DV36 DV48 Cylinder Liner Part No 000E4788.
• A high quality replacement Cylinder Liner for Bukh DV36 RME and DV48 ME 3 cylinder Marine diesel Engine.
• A 3 Cylinder Engine will required 3 Sets to be ordered, so as to make a complete set.

We also accept the customized orders of our clients and manufacture these products in accordance with the samples and drawings with the given material & coating.
Cylinder Sleeves, made of gray cast-iron, ought to have desired casting and machining qualities, viz. strength, toughness, hardness and wear resistance. These are mainly of two types – Dry sleeves and Wet sleeves. The sleeves are ‘cast-in fit’, force (press) fit or slip fit. The interference between its outer diameter and bore-hole walls depends on fit-type from 0.050 to 0.075 mm. These are available in wide range suitable for light, medium and heavy duty application.
In order to meet with industrial quality standards, we manufacture these sleeves from sand casting and centrifugal casting, which enables us to maintain the uniform hardness all over. Apart from this, we also keep into consideration various factors including distortion-less bore and low  thermal expansion to meet with the requirements of our clients. These sleeves are available in semi finished as well as full finished sizes.  Cross honing is done on the full finished products to make the inner bore distortion-less. The inner bores are cross honed to provide maximum  smoothness to the surface, that in turn reduces friction, when this inner bore is contacted with Piston Rings.

Quality:

• A very good plateau honing and cylindrical grinding that matches the geometrical parameters.
• Manufactured with chromium and nickel elements maintaining the BS4K6 material standard.
• Stringent material along with microstructure analysis of all the batches individually.
• Complete dimensional inspection of the finished components included in the process.
• Inspection of honing angle, structure and surface roughness at a random.
• Tests of profiles, tensile strength and crack detection at regular intervals in a random way.
• Manufacturing experience for the past 25 years and an expertise with single roof manufacturing outlet.
• A very wide range and suitable for up to 1500 models for worldwide cars, trucks, tractors and industrial engines.

Process

In the centrifugal casting process, the molten metal is poured into a metal mould or die which is revolving at a high speed. The centrifugal force  causes the metal to distribute itself evenly around the die. The resulting casting are of much finer grain and free from blow holes or porosity. A further  important advantage is that the impurities, being lighter than the iron, are forced centrifugally to the bore surface from which they are removed by machining.