Marine products offered by Gjerde AS, John


	Gjerde AS, John

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CHECK VALVES

Valve for ventilating liquid Mud tanks on offshore supply vessels carrying this medium.

It is important to prevent the clogging of a vent check valve, so as to ensure continous venting of the tank. This type approved valve ensures this, by hindering mud from entering the valve head. A swing check valve in the valves side allows for reliveing overpressure due to overfilling, by allowing the mud to escape through it.

- Type approved by DNV/ABS
- Documented flow characteristics

FUEL FILTER

The seawater and fuel strainers are produced in welded steel and can be delivered with different working pressures, maximum value of 64 bar! The basket filters inside the strainers are made from stainless steel.

The seawater strainers are protected against corrosion by a hot dipped galvanizing process to guarantee a long life cycle and the fuel strainers are standard delivered in "black steel".

We have a long experience designing and manufacturing these devices, enabling us to deliver the strainers tailormade in a variety of sizes and excecutions.

Technical details, fuel filters

Pamphlet

pdf

VALVES

This is the valve that is the most commonly used on ships. It comes with three different connection possibillities, flanged, threaded and with a weld but. It is a valve for on deck mounting. The valve is to be mounted with the vent opening (a), at least 760 mm above deck level for safety reasons(class requirement).

This valve is used to ventilate all tanks onboard ships; ballast tanks, fresh water tanks, lub oil tanks and fuel tanks, however it is not used to ventilate cargo tanks on oil or chemical tankers (These use PV valves. According to the international loadline convention from 1966, all tanks aboard ships are to be protected from seawater penetration by replacing the, until then much used, goosenecks with a vent check valve. This makes the valve a product that is used on all ships.

Technical details, valves

Pamphlet

pdf