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KARAR ValveHowrah, West Bengal
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KARAR Valve › Products › Check Valve

Check Valve

by KARAR Valve Howrah

The name of this product is taken from the company’s own website, checked November 2026. The company has not published its specifications here yet, so ask it for the exact model, capacity and price.

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What to settle before you ask for a quote

General guidance from SourceLoka for check valve (non-return valve); it is not this company’s specification.

  • Type: swing, lift, dual-plate or ball, chosen for the fluid, orientation and flow behaviour.
  • Size, pressure class and end connection.
  • Body and trim materials for the fluid and temperature.
  • Cracking pressure (the pressure needed to open it) and whether a spring assist is needed.
  • Installation orientation: horizontal, vertical flow up or down.
  • Design and test standard, and the certificates and spares available.
What is a check valve (non-return valve), and when should you choose another type?

The flow itself pushes a disc, ball or plate open, and when the flow stops or reverses a spring or gravity closes it against the seat. The main types are swing, lift, dual-plate wafer and ball check valves. They are fitted on pump delivery lines, on process lines and in building services, to prevent reverse flow and to protect equipment.

Check Valve (Non-Return Valve) or isolation valve? A check valve works automatically and only in one direction, so it cannot be used to isolate a section for maintenance. An isolation valve such as a gate or ball valve is operated by hand or actuator and shuts off both ways.

Where should a check valve be installed?

Commonly on the delivery side of a pump, between the pump and the isolation valve, and wherever reverse flow could damage equipment or contaminate a supply. Follow the supplier’s guidance on straight pipe length before and after.

What is water hammer and can a check valve cause it?

Water hammer is a pressure surge caused by a sudden change in flow. A check valve that slams shut when flow reverses can add to it, so fast-closing or spring-assisted designs are used in systems prone to surges.

Read the full buyer’s guide to check valve (non-return valve) →

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Before you order

  • We have not independently verified this company. A complete profile is not a certification. How we list companies
  • Company website reviewed November 2026: 8 pages, used for address, products, identity numbers, plant and documents, the summary.
  • For Industrial Valves, confirm: Design and test standard (API 6D, API 598, IS 778), pressure class, body and trim materials, leakage rate, and third-party inspection certificates.
  • The listed address may be a registered office rather than the factory. Ask which site would make your part.
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