NON-RETURN VALVES


 

NON-RETURN VALVES

Swing Check/Non-Return Valves are designed and manufactured according to BS1868. Function of Check Valve is to prevent the reverse flow of fluid in case of failure or sudden shut-down of Piping System. The Sealing efficiency, therefore, is a very critical aspect of Check Valves.

Swing Check Valves are provided with properly guided Swing Disc through a Hinge. The Hinge and swivel Disc are connected maintaining sufficient flexibility for smooth and efficient sealing. Swing Check Valves are available with Metal-to-Metal Sealing for High Temperature and Pressure, Soft Sealing for Pneumatic and Vacuum applications. The design ensures the Valves function smoothly with a very nominal differential pressure from either side. The disc is designed so compact and light weight to ensure minimum pressure drop across the Valve.

Swing Check Valves are available in varied materials like Cast Iron, Cast Carbon Steel, Cast Stainless Steel of all Grades, High Alloy Steels like Alloy-20, CD4MCu., Hastelloy etc. Manufacturing range commences in size from 50NB through 600NB; in Pressure Rating from ANSI 125# through 1500#.

Dual Disc Check Valves are designed and manufactured according to API 594 and available in wide rages like Metal to Metal Sealing, Soft Sealing, totally lined Valves with different lining material like Rubber of all varieties, PTFE / PFE etc.

 Dual Disc design ensures minimum pressure drop across the Valve. Spring loaded Disc ensures mounting of the Valve in Horizontal or Vertical direction. Space required for installing this Valve is comparatively lesser than Swing Check Valves.

Single Disc Spring Loaded Check Valves are designed and manufactured according to DIN 3230. The Valve is designed to mount between Flanges of different standards and in any direction. Ideal for instrumentation particularly for Pneumatic and Vacuum applications as available in Metal-to-Metal and Soft Sealing options.

Disc Check Valves feature a wafer type, compact and rugged Cast Carbon Steel or Stainless Steel design and are suitable for any process liquid, air, gas, steam etc. The Single Disc Check Valve (Wafer Type Disc Check Valve) consists of four main components: the body, a disc, a star guide and a spring. The Disc check valves are opened by the pressure of fluid and closed through compression spring as soon as flow stops thus preventing reverse flow.

Features :

Investment Casting Construction

Compact & Rugged Design

Stronger, Lighter and Smaller than Conventional Swing Check Valve, 
Hence Less Expensive to Install and Maintain

Single Disc Type

Spring Loaded Disc to Prevent Reverse Flow in Pipe Lines

Easy To Installation between Two Pipe Flanges

Metal To Metal or Soft Seat option Maintenance Free Design

Zero Leakage (In Soft Seat)

Full Port Opening

Wafer, Flangeless, Sandwich Type

Shorter Length, Required minimum space

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