High Pressure Pneumatic Underwater Actuators Guide

Actuators are manufactured from Stainless Steel 316 (SST 316) or Titanium, both of which offer excellent corrosion resistance in marine and offshore environments. Electrical connectivity is provided through Seacon or MCBH8M Subcon underwater-rated connectors designed for prolonged subsea exposure.

Axial force output varies by model. The Trunion series delivers between 1,000 N (220 lbs) and 77,500 N (7,000 lbs). The 60,000 N Force model provides up to 50,000 N axial force. Self-Compensated Linear models deliver up to 1,500 N, suitable for precision robotics and valve actuation tasks.

The Self-Compensated Linear and Rotary Actuator models include all logic and driver circuitry inside the housing, enabling standalone position control via RS422 or RS232 serial communication. The higher-force linear actuator models use an external resolver for feedback and require a separate driver and control system.

Self-compensated models support RS422 (RS485 full-duplex) and RS232 serial protocols at 19200 baud, 8-N-1 configuration. Communication parameters, virtual limit switches, and status broadcast frequency (default 10 Hz) are user-configurable and stored in onboard EEPROM for persistent settings between power cycles.

Higher-force models use a rotary resolver mounted on the motor shaft for external position feedback. Self-compensated models feature a 30-bit absolute encoder (14-bit single-turn plus 16-bit turns counter) mounted on the output shaft, providing 0.1-degree or sub-millimeter resolution with position retention across power cycles.

These actuators are designed for ROVs, subsea valve and pipeline control, offshore oil and gas infrastructure, underwater robotics, marine research instrumentation, water tank cleaning robots, and oceanographic systems. They are used globally wherever reliable, high-force linear or rotary motion is needed in submerged environments.