Check Valves

Check valves are used to allow fluid flow in a system in only one direction. They are operated by the flow of fluid in the piping. A check valve may be the swing type, lift type, or ball type. Most valves can be classified as being either stop valves or check valves. Some valves, however, function either as stop valves or as check valves-depending on the position of the valve stem. These valves are known as stop-check valves.

Check valves are two-port valves,  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. Although they are available in a wide range of sizes and costs, check valves generally are very small, simple, or inexpensive.An important concept in check valves is the cracking pressure which is the minimum upstream pressure at which the valve will operate. Typically the check valve is designed for and can therefore be specified for a specific cracking pressure.

  1. Cast Steel  Swing Check Valves

  2. Forged Steel Check Valves

  3. Wafer Type Check Valves

 

  1. Cast Steel  Swing Check Valves

Cast Steel Swing Check Valves are widely used in industries of  oil and gas, chemical, fertilizer, construction, etc. Cast Steel  Swing Check Valves prevent reversal of flow through pipe lines. They offer low resistance to flow and are particularly suited to low velocity service.

 

Image result for use of Cast Steel Swing Check Valves                             Image result for use of Cast Steel Swing Check Valves

Cast Steel Swing Check Valve Range

Size : 2”~30” (DN50-DN600)

Rating :ANSI 150LB~300LB~600LB~900LB~1500LB~2500LB

Body Materials : Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel

Trim :Per API 600

End Connection :BW, RF, RTJ

 

 

2.Forged Steel Check Valves

Forged Steel Check Valves are designed to provide maximum service and dependability. Forged Steel Check Valves can be full port or reduced port as per requirements of customers. Forged range of Swing Check Valves incorporates state of the art design features to provide a rugged construction, reliable operation and long life; suitable for all the segments of the process industries including oil & gas, refineries, petrochemicals, fertilizers, power plants, etc.

 

            Image result for Forged Steel Check Valves                                                    Image result for Forged Steel Check Valves

 

Forged Steel Check Valves Range

Size : 1/2”~2” (DN15-DN50)

Rating :ANSI 150LB~300LB~600LB~900LB~1500LB~2500LB

Body Materials : Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel

Trim :Per API 600

End Connection :BW, RF, RTJ, Threded, Flanged

3.Wafer Type Check Valves

Wafer Type Check Valves type combines a simple but robust construction with reliability. They are specially designed and developed for applications where a low pressure loss is essential. Our Wafer Type Swing Check Valve has short face to face dimensions and low weight allows a simple space saving installation between the companion flanges. This design is lighter, and hence much cheaper when compared to swing and forged valves in the same diameter and pressure class.

 

Image result for Wafer Type Check Valves                                      Image result for Wafer Type Check Valves

Wafer Type Check Valves Range

Size : 1/2”~48” (DN15-DN50)

Rating :ANSI 150LB~300LB~600LB~900LB~1500LB~2500LB

Body Materials : Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel

Trim :Per API 594

End Connection :Wafer Type

 

 

 

SPECIAL METALS AND EQUIPMENTS FZE has been supplying Pipes, Fittings, Fasteners, Flanges, Plates, Sheets, Coils, Bars(Round, Hex, Square) Stud Bolts, Valves, Gaskets, Pumps, Winches and other Bulk Material worldwide (mainely in middle east countries) for several years.

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