Damcos LPU Plus-DD1-0.7S-T2-H2-BA PAV05 & BRC 500-B1 DN250 Actuator Unit

Damcos LPU Plus-DD1-0.7S-T2-H2-BA-On/Off PAV05 with BRC 500-B1 Actuator & DN250 Valve

The Damcos LPU Plus-DD1-0.7S-T2-H2-BA-On/Off PAV05 combined with the BRC 500-B1 Hydraulic Rotary Actuator and a DN250 (10-inch) Valve is an industry standard electro-hydraulic valve remote control unit for demanding maritime, offshore and industrial fluid control applications.

The system is designed as a self-contained Local Power Unit (LPU) which removes the need for substantial centralized hydraulic piping networks, high-pressure hydraulic power units (HPUs) and long hydraulic lines throughout ship cargo or ballast holds. The LPU Plus unit is immediately attachable to the double acting BRC 500-B1 balanced rotary actuator to form a localized hydraulic pressure source thru a micro-processor driven reversible electrical motor-pump assembly. This rugged package is rated for operating pressures up to 135 bar and offers fail-set quarter-turn actuation for high-torque DN250 maritime butterfly or ball valves.

Model Details:

• LPU Plus: Advanced Local Power Unit with onboard digital control, micro-processor logic, status LEDs, and bus/power control compatibility.
• DD1: Double-acting, direct-drive reversible hydraulic gear pump system.
• T2: 0.25-Liter integrated hydraulic fluid expansion reservoir tank.
• H2: Integrated emergency hand pump module for manual local override operation.
• BA: Block Actuator direct-mount mounting configuration (eliminates external tubing lines).
• On/Off: 24VDC digital pulse command interface for discrete open/close remote operation.
• PAV05: Internal valve block / porting revision code version 05.
• BRC 500-B1: Double-Acting Balanced Hydraulic Rotary Actuator (500 Nm class torque capacity).
• DN250 Valve: 250 mm (10-inch) nominal diameter marine butterfly/ball valve body.

Key Features

1. Self-Contained Decentralized Hydraulics: Combines power unit, hydraulic reservoir, control block, and actuator into a single IP68 submersible enclosure, bypassing centralized HPU infrastructure.
2. Balanced Rotary Output Torque: The BRC 500-B1 utilizes a double-acting helical spline mechanism that produces constant, vibration-resistant torque across the full 90 stroke.
3. DPI-E Digital Position Feedback: Features optical/electronic valve position indication (Open/Closed/Intermediate) directly reported to the main Valve Remote Control System (VRCS)
4. Integrated Manual Override (H2): Fitted with an auxiliary mechanical hand pump block allowing local emergency valve operation in total power blackout conditions.
5. Submersible Marine Enclosure: Heavy-duty marine-grade bronze/cast iron housing rated to IP68 (3 bar immersion for 24 hours), resisting harsh saltwater corrosion.

Part Number Cross-References

• Damcos LPU Assembly Part Number: 160G4182 / 160G4180
• Damcos BRC 500 Actuator Part Number: 160N1099 / 160N1098
• Solenoid Valve Block Assembly: 160L8110 (SA-G01 Series)
• Equivalent / Legacy Models: LPU-D-0.7S-T2-H2, LPU Plus PAV03, Danfoss LPU-DD1

Applications

• Shipboard Ballast Water Management Systems (BWMS): Remote ballast tank isolation and cross-flooding valve remote control.
• Cargo Oil Handling & FPSO Systems: High-reliability cargo line isolation on oil tankers, chemical carriers, and offloading units.
• Bilge & Slop Tank Remote Valves: Engine room bilges, drainage lines, and oily water separator control.
• Offshore Rig & Drillship Automation: Critical valve shutdown and sea-chest suction control in hazardous or submerged spaces.

Frequently Asked Questions

How does the Damcos LPU Plus differ from traditional centralized hydraulic valve remote control systems?

The Damcos LPU Plus is an electro-hydraulic unit that generates hydraulic pressure locally on top of the actuator using an onboard motor-pump unit. Traditional systems require central hydraulic power units (HPUs), long stainless steel hydraulic distribution pipes, and bulky valve block cabinets, whereas the LPU solution requires only electrical power and control wiring.

What is the purpose of the H2 emergency hand pump on the LPU unit?

The H2 option provides an integrated manual override block. In the event of a total vessel blackout or electrical supply failure, a shipboard engineer can manually operate the valve using a hand lever to pressurize the BRC 500 actuator chambers.

Can the Damcos LPU Plus-DD1 be submerged under water or bilge fluids?

Yes. The LPU unit features an IP68 marine enclosure rating, certified to withstand water immersion up to 3 bar hydrostatic pressure for 24 hours. This makes it suitable for installation inside ballast tanks, bilge wells, and open deck areas exposed to heavy seas.

What is the maximum operating torque for a Damcos BRC 500-B1 actuator?

The BRC 500-B1 actuator generates up to 500 Nm of nominal torque at maximum working pressure (135 bar). Its balanced double-acting design delivers equal torque in both opening and closing directions, making it ideal for high-torque DN250 butterfly valves.