John Gjerde

John Gjerde is an innovative provider of equipment made to ensure reliable and safe operation of all kinds of floating constructions. They have their own test facilities for simulating full-scale operation with performance testing and documentation.

John Gjerge valves are used on offshore supply vessels being built worldwide.

With 45 years of experience in this market, John Gjerde has developed a complete new range of “Air Vent Check Valves”, with the name HIDE. HIDE has many unique & patented properties and represent the most optimized and reliable valve in the market

The Product Range

The unique advantages of the HIDE valve are

The unique disc-float formed for optimal air flow with integrated lip seal gasket.
1. Makes it robust against damages from overfilling.
2. Makes it work with a very low noise level.
3. Make a very high tightness in dipping situations.
This disc and pin concept protects the closing function, and makes the HIDE to the most reliable in the market.
The HIDE valve is also small, and not wider than the flange.
The flow area inside is bigger than it has to be according to the regulations.
This decreases the risk for “suction blocking” and structure break down.
The flame screen has a robust construction and is re-enforced to prevent breakdown due to water overfill or debris in the water. The screen is also large to minimize pressure drop.
The shield protects the closing mechanism against dirt from the air and spray painting
The heating (winterization) solution available as an option.
Sea water resistant aluminium, to prevent corrosion. Also delivered in steel, or other materials.
Approved by all major classification societies