Tiered Submersible & Subsea Hydraulic Actuators

From Marine Engine Room & Deck Systems to Extreme Deep-Sea Solutions.

T-Series: Deck & Ballast • S-Series: 50m Submerged • D-Series: 330m Deep-Sea

Precision-engineered with specialized anti-corrosion technologies for reliable performance in every maritime environment.

D771X: Modular Hydraulic Butterfly Valve Platform (Hydraulically Actuated)

The D771X Series represents a new standard in integrated valve automation. By pairing our high-performance butterfly valves with the T, S, or D series hydraulic actuators, INJOY provides a modular system that adapts to your specific environment. Whether for space-constrained engine rooms or high-pressure subsea manifolds, the D771X ensures precision control and long-term durability.

Body: EN-GJS400-15 (Option: C95800)

Stem: SS420 | Disc: C95800 (Option: 2205)

Seat: EPDM (Option: NBR, FKM)

Sizes: DN50 – DN600

Pressure: PN10, PN16 | Flange: EN1092-1

Hydraulic actuator: BS EN 15714-4, IP68

Hydraulic oil viscosities: 15 ~ 46cST/40°C

[View & download specs] D771X-Hydraulically Actuated Butterfly Valve-EN.pdf

Three Configurations for Every Challenge

T Series compact hydraulic actuator with 0.3s-1.0s rapid response, driving D771X butterfly valve for marine use.

D771X-T: Shipboard & Deck Service

Actuator: T-Series

Depth: Submersible (Shallow Water)

Response: Rapid 0.3s – 1.0s operation.

Best For: High-density piping, engine room ballast systems.

S Series 50m submersible actuator with internal oil circuit, driving D771X butterfly valve for maintenance-free ballast tank operation.

D771X-S: 50m Submerged Service

Actuator: S-Series

Depth: Rated for 50 meters.

Reliability: C5-M (Option: IM3/C5-H).

Best For: Ballast tank automation.

D Series heavy-duty hydraulic actuator designed for 3.3MPa (330m) subsea applications, driving D771X butterfly valve.

D771X-D: 330m Subsea Service

Actuator: D-Series

Depth: 330 meters (3.3 MPa).

Protection: C5-H

Best For: Deep-sea manifolds and subsea infrastructure.

For ultra-high pressure or special subsea requirements (330m+), please contact our technical team for custom D-series solutions.

PFB-0420MA IP68 feedback box natively integrated on T, S, and D series hydraulic actuators for 4-20mA monitoring of D771X butterfly valves..

Optional PFB Feedback Module

Every D771X configuration can be equipped with our PFB module, providing 0-100% real-time position confirmation for centralized bridge or engine room control. Our native integration ensures that the actuator and feedback system operate as a single, high-integrity unit.

Triple-Layer Defense

Proprietary Solid-State Encapsulation and redundant internal sealing; ensures bone-dry operation under extreme hydrostatic pressure and condensation.

German P+F Precision

Integrated with premium Pepperl+Fuchs analog sensors for continuous 4-20mA position visibility.

Heavy-Duty Construction

Cast in C95800 Nickel-Aluminum Bronze with 316L Stainless Steel interfaces; immune to seawater corrosion and biofouling.

Operational Depth

IP68 Rated and system-verified for depths up to 330 Meters / 1,083 Feet (D-Series with Bronze Top Cap). We offer tiered testing for T-Series (5m) and S-Series (50m) to match your specific offshore requirements.

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