Non Return Check Valves Supplier in Pakistan

Non-return valves — commonly called check valves — allow flow in one direction only and close automatically to prevent reverse flow. That protects pumps, compressors and pipelines from the backflow and water-hammer damage that follows a pump trip. A. Karimjee & Sons supplies check valves in swing, lift, dual-plate, wafer and silent designs to suit a wide range of line sizes and media.

Check Valve Specifications

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Check Valve Specifications
Valve type	Non-Return (Check) Valve — automatic backflow prevention
Types available	Swing, Lift, Dual Plate, Wafer, Silent
Body materials	Carbon Steel, Stainless Steel (SS304 / SS316), Cast Steel, Cast Iron, Ductile Iron, Brass
End connections	Flanged, Wafer, Butt Weld, Threaded [confirm]
Size range	[confirm]
Pressure class	[confirm]
Standards	API, ANSI, ASME, ASTM, BS, DIN and ISO

Types We Supply & How to Choose

Check Valve Types

Selection guide

Swing: Suits larger, low-velocity lines with steady flow.
Lift: Works well on horizontal, high-pressure lines.
Dual Plate: Compact and light — ideal where space and weight matter.
Wafer: Fits between flanges for a minimal footprint.
Silent: Spring-assisted; closes before flow reverses, minimising water hammer on pump discharge lines.

Oil & Gas
Petrochemical
Chemical Processing
Water Treatment
Power Generation
Marine
HVAC
Food & Beverage
General Industry

Key Features & Benefits

Fully automatic — no operator or actuator needed
Protects pumps and compressors from backflow
Reduces water hammer with the right design
Low maintenance, few moving parts
Compact wafer and dual-plate options save space
Wide choice of body and trim materials

Frequently Asked Questions

How does a check valve prevent backflow?

Forward flow pushes the disc or plate open; when flow slows and tries to reverse, the disc closes against the seat automatically, blocking reverse flow.

Which check valve is best for reducing water hammer?

Silent (spring-assisted) and dual-plate check valves close quickly, before significant reverse flow builds up, which reduces the pressure surge that causes water hammer.

Can a check valve be installed vertically?

Some types can, provided flow is in the correct direction (usually upward). Always confirm the valve's approved orientation before installation.

Need check valves to protect your pumps? Send the type, size, material and pressure class — we'll confirm availability.

Request a quote +92-21-32422431