IP68 Waterproof Electric Actuators

Submersible Quarter-Turn Series

Dedicated 90° rotary actuation designed for underground valve pits and flooded pipeline chambers. Direct mounting to resilient-seated butterfly valves, eccentric plug valves, and flanged ball valves via ISO 5211 flange connections without external brackets.

• Torque range: 50 Nm up to 4,000 Nm
• Submersion rating: 10 meters depth for 72 continuous hours
• Dual O-ring shaft sealing with marine-grade waterproof cable gland potting

Submersible Multi-Turn / Linear Series

Multi-rotation and high-thrust drive units built for submerged sluice gates, culvert penstocks, and rising-stem knife gate valves in flood retention basins, irrigation reservoirs, and raw sewage treatment intake channels.

• Thrust capacity up to 300 kN, output torque up to 5,000+ Nm
• ISO 5210 Group A thrust base with sealed grease-lubricated bearing housing
• Fully submersible extended manual stem drive & remote surface indicators

Certified 10m/72h Submersible Rating

100% factory hydrostatic pressure-tested in accordance with IEC 60529 IP68. Guaranteed to operate reliably while submerged up to 10 meters depth for 72 continuous hours during seasonal typhoons or sewer line flooding.

Double-Sealed Terminal Architecture

The terminal wiring compartment is physically isolated from internal motor windings and control circuit boards by an internal hermetic barrier. Even if field technicians remove the wiring cover in damp conditions, internal electronics remain moisture-tight.

Non-Intrusive Infrared Calibration

All valve limit calibrations, torque setpoints, and network addresses are configured through the tempered glass viewing window via an infrared handheld remote, eliminating the need to ever open the enclosure in wet field environments.

Redundant Dual O-Ring Shaft Seals

Output drive shafts and manual handwheel shafts incorporate tandem Viton/NBR O-rings backed by waterproof grease chambers. This redundant sealing barrier stops high-pressure water infiltration along dynamic rotating surfaces.

C5-M Heavy Marine Protective Coating

Castings receive a multi-stage chromate treatment followed by high-build epoxy primer and polyurethane topcoat (tested for 1,000+ hours salt spray). Resists brackish seawater, sewage hydrogen sulfide (H2S), and industrial washdown chemicals.

Thermostatic Anti-Condensation Heater

Rapid temperature swings between submerged water and humid air can cause internal dew-point condensation. Every unit includes an internal PTC heating element that activates automatically to keep control electronics dry and condensation-free.

1. What is the difference between IP67 weatherproof and IP68 submersible actuators?

An IP67 rating only certifies temporary water immersion up to 1 meter depth for a maximum of 30 minutes. In contrast, an IP68 rating guarantees continuous underwater operation under higher hydrostatic pressure (DELCO standard: 10 meters depth for 72 continuous hours). IP68 units feature double O-ring drive shaft barriers, factory resin-potted terminal entries, and double-sealed housings capable of enduring severe underground pit flooding.

2. How should field electrical wiring be terminated to maintain IP68 integrity?

Most field failures in submerged actuators occur through improper cable entry rather than housing leaks. To ensure true IP68 integrity, DELCO supplies certified IP68 submersible double-compression cable glands or pre-potted cable tails. The terminal compartment is physically separated from internal motor controls by an internal sealing wall, preventing moisture wicking through cables from reaching the drive electronics.

3. Can DELCO IP68 actuators withstand continuous seawater or raw wastewater?

Yes. For marine, desalination, or wastewater treatment applications containing high chlorides and hydrogen sulfide (H2S), DELCO coats actuator bodies with a C5-M high-durability epoxy-polyurethane paint system tested for over 1,000 hours of salt spray exposure. All external fasteners, screws, and handwheel clutch levers are fabricated from corrosion-resistant 304 or 316 stainless steel.

4. How is emergency manual operation conducted if the valve is submerged in a flooded chamber?

While DELCO IP68 actuators feature a declutchable handwheel on the body with waterproof shaft seals, accessing a deeply submerged valve pit during an emergency can be hazardous. DELCO can equip the actuator with extended vertical drive spindles, remote surface gearboxes, or surface-mounted remote push-button control stations, enabling operators to control the valve safely from above ground level.