Our Sister company Maverick Valves Manufacturing HQ manufactures complete integrated units of subsea valve, actuator and ROV receptacle tool.
With a very strong Quality Assurance and Engineering
Dept., MVM HQ is able to design and manufacture the most specific and
customized actuated valves according to the project requirements.
Subsea Valves and actuators are critical components of any offshore installation.
Any subsea intervention is costly, time-consuming and extremely difficult, and any
failure would result in loss of profit for the
Operators and End Users.
Type of applications
Pipeline subsea valves
Subsea Manifolds
Line tees for future tie-ins
Jacket flooding valves
SSIV (Sub Sea Isolation Valves)
PLEM ESDV and On/Off Valves
Semi-submersible Buoy and Turret
Type of valves used in subsea environments
Ball Valves
Generally Piggable type, they are used normally in subsea pipeline
Possibility of Seat design metal to metal with tungsten carbide coating.
Corrosion Resistant Alloys on valve dynamic sealing parts and ring joint grooves
Redundant sealing, for increased reliability of the valve
Through Conduit Slab and Double Expanding Gate Valves
They are used normally in subsea manifolds or pipelines when there are fluid mixes of liquid, gas, and sand.
The valve design is suitable for a high percentage of sand or solid particles
inside the fluid and very high pressure (normally above 5000 psi)
Thanks to their Through Conduit Design, they are fully Piggable.
Possibility of Seat design metal to metal with tungsten carbide coating.
The Double Expanding Gate Valves are used when a DB&B is required for isolating the downstream cavity
Check Valves
Piggable type, they are used normally in subsea
pipelines
On request, they can be provided with Override Tool
(ROV Operable) for allowing Piggability of both sides
The Valves are operated by the types indicated in
“Types of Operators”
Type of operators
Shallow water (normally down to 75 meters water depth)
by
Diver
by
ROV receptacle tool
remotely
by Hydraulic Actuators with or without ROV receptacle tool / Hand-wheel
override
Deep water (normally down to
3500 meters water depth)
by
ROV receptacle tool
by
Hydraulic actuators with or without ROV receptacle tool override in case of
hydraulic failure
Main standards
API 17D/ISO 13628-4 (Specification of subsea equipment and wellhead equipment)
API 17A/ ISO 13628-1 (Design and Operation of Subsea Production Systems)
API 17H/ ISO 13628-8 (Remotely Operated Vehicle (ROV) interfaces on subsea production systems)
API 6DSS/ISO 14723 (Specification on Subsea Pipeline Valve)
ISO 10423 (drilling and production equipment)
Norsok –U-001 (subsea production system)
Norsok – L-001 (piping and valves)
Norsok – M-001 (material selection)
Testing
Subsea valves and actuators are tested and inspected
in accordance with:
ISO
10423
API
6A (at PSL Level)
Some other types of test (other than the standards for
the above-surface valves and actuators) are:
Gas testing according to API 6D / API 6A PSL 3G
Performance verification test according to API 6A PR 2
