Offshore Applications

They include high pressure drops (over 200 bar), high temperature (over 1000° C), significant media solids content (70%) or a combination of all three. In addition to this offshore valves have to withstand the corrosive sea water atmosphere as well as exacting safety standards.

Material and Trim expertise

Our expertise in material and long life trim design enables SchuF to address the effects of corrosion and cavitation common in offshore and maritime applications. Valve reliability is improved in offshore applications by paying particular design attention to entrained solids in the media (such as sand, weld slag, or pipe scaling), which can cause clogging and equipment damage.  

Offshore Line Blind System

Absolute positive shut-off is essential on FPSO, oil rigs and maritime vessels in order to carry out maintenance or shut down in case of emergency. The SchuF Fetterolf Maritime Line blind valve is ideal for this severe environment due to a number of features:

• One man, one side operation
• Quick blind changing – less than 1 minute
• No line spreading or bolt removal
• Positive dead tight shut-off
• Size 1” to 20” ASME 150# to ASME 900# - standard
• Special re-inforced offshore design 

The Maritme line blind system is provided with a monel stem, brass handwheel, stainless steel bolting and a Sermetal 85 coating. They are safe, convenient and fast to operate.

For more information, please see the line blind product page

Automatic Recirculation valves (ARC) for Maritime Applications

 The protection of large centrifugal pumps on FPSO’s, platforms and maritme vessels is critical to ensure operational efficiency and safety. ARC valves protect pumps during low load operation, and provide a non return and pressure modulation functionality. They are typically used to protect crude oil pumps; booster pumps; and boiler feed water pumps

SchuF provides a range of standard ARC valves from 1” to 14” and up to ASME 4500# class as well as a special offshore ARC valve design. The Offshore ARC valves are suitable to protect: 

• Seawater injection pumps
• Seawater lift pumps
• Firewater pumps

Special body (e.g. sea water resistant Duplex with 22% chrome) and trim materials are used in these applications.

For detailed information, please see the ARC product page:

Control Valves for Offshore Applications

SchuF has a broad range of control valves suitable for pressure letdown, temperature, feed and level control in offshore applications. The key features of the SchuF control valve range include:

• DN 25  (1 inch) to DN 500 (20 inch) forged or cast
• Body geometry with constant acceleration to the seat
• High Cv value throughput
• Cv sizing for 3 stage flow
• Flow to open or close valve designs
• Single or multistage letdown
• Linear, true equal % and SchuF X³ bell curve control characteristic
• Tight shut-off (Class VI – API 598)
• Hard metal, ceramic or coated trim parts
• Easy to replace trim parts

Customisation for Offshore control valves

Each SchuF valve is customised according to the piping requirements and the process variables. This ensures optimum valve performance, lower maintenance, superior noise and vibration control, and extended trim life. Some SchuF control valves examples in the oil, gas and offshore market  include: High pressure seperator letdown; Overboard dump valve; Water reinjection pump recirculation valve; Compressor anti-surge / recycle control; Gas to flare control; Feed pressure and flow control and Variable choke valves.

For more information, please see the control valve product page.

Offshore Isolation Valves

 SchuF produces a wide range of isolation valves for use in the oil, gas, and offshore industry. These include Y-globe valves, lift plug valves and and high pressure isolation control valves. Typical applications include: 

• Pipeline and process isolation;
• Emergency shutdown;
• Emergency letdown
• Boarding isolation 

All of these valves can be provided with a maritme or severe service trim and body materials.