SIGMA INDUSTRIES,Gate Valves Suppliers Taloja,Ball Valves Suppliers Taloja,Forget Steel Valve Suppliers Taloja


Sigma Industries
ISO 9001:2008 Certified Company


Gate Valve : - A gate valve, also known as a sluice valve, is a valve that opens by lifting a round or rectangular gate/wedge out of the path of the fluid. The distinct feature of a gate valve is the sealing surfaces between the gate and seats are planar, so gate valves are often used when a straight-line flow of fluid and minimum restric¬tion is desired. The gate faces can form a wedge shape or they can be parallel. Typical gate valves should never be used for regulating flow, unless they are specifically designed for that purpose.

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Manufactured as per API 600 / BS 1414


Globe Valve : - A globe valve is a type of valve used for regulating flow in a pipeline, consisting of a movable disk-type element and a stationary ring seat in a generally spherical body. Globe valves are named for their spherical body shape with the two halves of the body being separated by an internal baffle. This has an opening that forms a seat onto which a movable plug can be screwed in to close (or shut) the valve. The plug is also called a disc or disk. In globe valves, the plug is connected to a stem which is operated by screw action in manual valves. Typically, automated valves use sliding stems. Automated globe valves have a smooth stem rather than threaded and are opened and closed by an actuator assembly. When a globe valve is manually operated, the stem is turned by a handwheel

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Manufactured as per BS 1873


Swing Check Valve : - A check valve, non-return valve or one-way valve is a mechanical device, a valve, which normally allows fluid (liquid or gas) to flow through it in only one direction. Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide variety of applications. Check valves are often part of common household items. Although they are available in a wide range of sizes and costs, check valves generally are very small, simple, and/or inexpensive. Check valves work automatically and most are not controlled by a person or any external control; accordingly, most do not have any valve handle or stem.

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Manufactured as per BS 1868


Ball Valve : - A ball valve is a valve with a spherical disc, the part of the valve which controls the flow through it. The sphere has a hole, or port, through the middle so that when the port is in line with both ends of the valve, flow will occur. When the valve is closed, the hole is perpendicular to the ends of the valve, and flow is blocked. The handle or lever will be inline with the port position letting you "see" the valve's position. The ball valve, along with the butterfly valve and plug valve, are part of the family of quarter turn valves. Ball valves are durable and usually work to achieve perfect shutoff even after years of disuse. They are therefore an excellent choice for shutoff applications (and are often preferred to globe valves and gate valves for this purpose). They do not offer the fine control that may be necessary in throttling applications but are sometimes used for this purpose.

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Manufactured as per BS 5351


Forged Valve : - Forged Steel Valves are widely used in Process Industries where High Pressure and Temperature are encountered. Under Forged Steel Valves you have Forged Steel Gate Valves, Forged Steel Globe Valves & Forged Steel Lift Check Valves.

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Manufactured as per BS 5352


The Materials
Following are a few Materials of construction of valves offered by Sigma.
Many other special alloys and custom made Materials are also available on request.
Category ASTM Specification
Cast Forged
Carbon Steels
General Use
A 216 Gr. WCB A  105
A 216 Gr. WCC
Carbon And Alloy Steels
Low Temperature Services.
A 352 Gr. LCA A 350 Gr. LF2
A 352 Gr. LCA
A 352 Gr. LCA
Alloy Steels
High Temperature Services.
A 217 Gr. WC1 A 182 Gr. F6A
A 217 Gr. WC4
A 217 Gr. WC5
A 217 Gr. WC6
A 217 Gr. WC9
Stainless Steels
Corrosive Services.
A 351 Gr. CF8 A 182 Gr. F 304
A 351 Gr. CF8M A 182 Gr. F 316
A 351 Gr. CF8C --
A 351 Gr. CF3 A 182 Gr. F 304 L
A 351 Gr. CF3M A 182 Gr. F 316 L
High Alloy Steels
Corrosive Services
A 351 Gr. CN7M --
A 351 Gr. CD4MCu --
A 744 Gr. N12M --
A 744 Gr.M 35 – 1 --