Check valves

Check valves effectively prevent reverse flow of liquids and gases in industrial pipeline systems. At Insatech, we offer reliable solutions designed to protect your equipment and maintain optimal flow control across a wide range of applications - including high-performance Ghibson check valves.

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Ghibson - Wafer check valve GH 011 is available in DN 125 to DN 200 - 5 ”to 8”, Pmax 25 bar. Moreover, it is small in size, low in weight, and can be installed in all positions. Usable also as vacuum breacker, overpressure and bottom valve. Available with house in galvanized steel and disc, spring, and seat in stainless steel.

Ghibson - Wafer check valve GH 015 is available in DN 125 to DN 200 - 5 ”to 8”, Pmax 25 bar. Moreover, it is small in size, low in weight, and can be installed in all positions. Available with house, disc, spring, and seat in stainless steel. Usable also as vacuum breacker, overpressure and bottom valve.

Ghibson - Wafer check valve GS 011 is available with DN 40 to DN 500 - 1 1/4 "to 20". Moreover, it is small in size, low in weight, and can be installed horizontally or vertically. Available with house in galvanized steel and flap, spring, and screws in stainless steel.

Ghibson - Wafer check valve GS 015 (swing type) is available with DN 40 to DN 600 - 1 1/2" to 24". Moreover, it is small in size, low in weight, and can be installed horizontally or vertically. Available with house, flap, screws, pins, and spring in stainless steel.

Ghibson - Wafer check valve GS 095 is available with DN 40 to DN 600 - 1 1/2" to 24". Moreover, it is small in size, low in weight, and can be installed horizontally or vertically. Available with house, flap, screw and pins made of Super Duplex, and the spring made of INCONEL 718.

Ghibson - Wafer check valve GT 091 is available in DN 15 to DN 100 - 1/2 "to 4", Pmax 160 bar. Moreover, it is small in size, low in weight, and can be installed in all positions. Usable also as vacuum breacker, overpressure and bottom valve. Available with house, disc, spring, and seat in Hastelloy.

Ghibson - Wafer check valve GT 095 is available in DN 15 to DN 100 - 1/2 "to 4", Pmax 160 bar. Moreover, it is small in size, low in weight, and can be installed in all positions. Usable also as vacuum breacker, overpressure and bottom valve. Available with house, disc, and seat in Super Duplex.

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Check Valves for Industrial and Marine Applications

Whether you need a wafer check valve with or without a swing-type disc, we supply both disc and swing types from trusted brands such as Ghibson:

Disc check valves can be installed in all orientations (horizontal or vertical)
Swing check valves can be installed horizontally or vertically depending on model

The difference lies in their internal mechanism. Choosing the right design depends on your application and installation requirements.

Product Highlights

Compact design and lightweight construction
Designed for pressures up to 160 bar
Suitable as vacuum breakers, for overpressure protection, or as a Non-return valve
Available in a wide selection of materials including stainless steel, Hastelloy, and Super Duplex
Includes certified Ghibson check valve options for industrial and marine applications

What Is a Check Valve?

A check valve is a type of valve that prevents liquid or gas from flowing backward in a system. It protects critical equipment and ensures unidirectional flow, preventing potential damage to components such as pumps, valves, and pipelines.

Check valves are widely used in industrial systems - including pump stations, pipelines, and ventilation systems - to ensure reliable and efficient operation.

Types of Check Valves

Swing Check Valve (Flap Type)

Uses a hinged flap that swings open when flow moves in the correct direction. If flow reverses, the flap quickly closes to stop backflow. Ideal for use in pipelines and pump systems where rapid closure is essential to protect equipment.

Disc Check Valve (Spring-Loaded Type)

This valve features a disc pressed against the seat by a spring. When flow occurs in the correct direction, the disc lifts to allow passage. When flow stops or reverses, the spring pushes the disc back to seal the valve. This type is compact, reliable, and effective at preventing reverse flow.

Applications of Check Valves

Check valves are critical components in various systems, including:

Pipelines: Prevent reverse flow that could lead to pressure build-up or equipment damage
Pump systems: Protect pumps from backflow that could harm motors or disrupt pressure balance
Ventilation systems: Stop air from flowing back into ductwork, which could affect air quality and efficiency
Marine systems: Robust marine check valves designed to perform under challenging sea conditions

How Does a Check Valve Work?

A check valve operates automatically, closing when liquid or gas attempts to flow in the wrong direction. It seals tightly to prevent backflow and protect downstream equipment. Some check valves are purely mechanical, while others allow for controlled closing based on specific pressure or flow conditions.

Benefits of Using Check Valves

Protects equipment: Prevents reverse flow damage to pumps, motors, and valves - extending equipment life and reducing downtime
Maintains system integrity: Helps prevent pressure spikes and backflow failures in pipelines and process systems
Supports safe and stable operation: Especially critical in high-pressure and sensitive installations
Available in marine-grade configurations: Including Ghibson check valves and heavy-duty marine check valve models