Oilfield and gas equipment / Valves and pipes

Butterfly Valves

A Butterfly Valve is a types of valve that isolates and regulates the flow of a fluid by a disc provided across the bore of a ring body having the same radial dimensions as the pipe in which it is fitted. It comes among the family of quarter turn valve and working is same as ball valve. The valve is quick acting if required, as only a quarter of a turn of the spindle is required to move the valve from the fully open to the fully closed positions.

Butterfly valves are popular for on-off or modulating services due to their light weight, small installation footprint, lower costs, quick operation, and availability in extremely large sizes (Sizes range from 6 mm to over 1000 mm bore ). Handles, gears, or automatic actuators can be used to operate these valves.

Large Butterfly valves are typically equipped with a so-called gearbox, which connects the handwheel to the stem via gears. This simplifies the valve’s operation, but at the expense of speed.

Advantages of butterfly valves

Depending on the application, butterfly valves can offer significant advantages over other types of valves, especially for dimensions over DN 200 (200 mm) in size:

• Lightweight and Compact: With a compact design and a smaller face to face dimension, butterfly valves have a considerably less installation footprint and offer savings in the form of lower installation costs including labour cost, equipment, and piping support.


• Low Maintenance Requirements: An inherently simple, economic design that consists of few moving parts, and hence fewer wear points, significantly reduces their maintenance requirements.


• Fast Acting: A 90° rotation of the handle, or the actuation mechanism, provides a complete closure or opening of the valve. However, with larger butterfly valves, a gearbox is often required as part of the actuation mechanism which reduces the operational torque and simplifies the operation of the valve but comes at the expense of speed.


• Low Cost: Owing to their simple design, butterfly valves require less material and are simpler to design and manufacture and are often the more economical choice compared to other valve types. The cost savings are mainly realized in larger valve sizes, typically above DN 300.


• Versatility: Butterfly valves have a wide variety of use cases including the ability to be installed underground.

Stainless steel welded pipes

The pipe is a straight pressure tight cylindrical hollow, used in the piping system to transport liquid, gas and sometimes solids. Different types of pipes are used in different design conditions, considering technical and commercial parameters.

Stainless steel pipe is one of the more standardized materials in the building and engineering industries. The thickness of the pipe walls, diameter of the pipe and even the chemical composition are all written as part of the American National Standards Institute standards, which is just one of multiple standards available.

We can provide different standarts of pipes in different fields sectors.

Chinese Standards: 06Cr19Ni10, 022Cr19Ni10, 06Cr17Ni12Mo2, 022Cr17Ni12Mo2, 06Cr25Ni20, 06Cr18Ni11Ti, 07Cr19Ni11Ti, 06Cr18Ni11Nb, 07Cr18Ni11Nb.

American Standards: 304, 304L, 316, 316L, 310S, 321, 321H, 347, 347H

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