SKE GVL Series Self-Locking Position-Retention Valve

Product Overview

The SKE GVL Series Self-Locking Position-Retention Valve is engineered for automated control loops that demand extremely high fault tolerance, serving as the final safety line of defense for pneumatic actuators.

When the signal air pressure in a plant's piping network drops below a preset hazardous threshold, the GVL series responds in milliseconds, instantly cutting off and locking the chamber pressure of the pneumatic actuator (such as a precision control valve or cylinder). This "position-retention" mechanism forces the actuated valve to "freeze" in the exact position it held the instant before the air supply failure occurred.

Core Advantages and Features:

● Extreme Pressure-Differential Sensitivity:Uses an internal high-precision diaphragm and spring-balance mechanism; the actuation differential between sensed signal pressure and release pressure is precisely controlled to just 0.01 MPa. Even extremely subtle abnormal pressure drops in the air network are sensitively detected and instantly trigger locking.

● Wide, Robust Setting Range:Supports a maximum signal input pressure of 1.0 MPa, with a safety locking threshold that can be precisely and steplessly set across a wide range of 0.14 to 0.7 MPa. Perfectly suited to a wide range of complex applications, from low-pressure micro-control to high-pressure heavy-duty drives.

● Full-Dimensional Air Path Shut-Off Protection:Available in single-acting and double-acting logic versions, with an absolute shut-off pressure capability of up to 0.7 MPa. The double-acting model can simultaneously lock both chambers of a cylinder, while the single-acting model tightly maintains the volume on a single side, completely eliminating actuator position drift caused by residual pressure leakage.

● Rugged Environmental Adaptability and Clean Interface:Operates stably across a wide temperature range of -5°C to 60°C. Combined with a 1/4" NPT dry-seal thread design, it eliminates the risk of PTFE tape debris shedding, meeting the demanding requirements of advanced materials manufacturing for high-purity, zero-contamination control piping.

Three Key Application Scenarios

The SKE GVL series is deeply suited to the demanding process requirements for pneumatic safety in the following high-potential markets:

1. Temperature Control for High-Nickel Ternary and Silicon-Carbon Anode Material Reactors

○ Requirements and Fit: In the synthesis of new-energy battery cathode/anode precursors or CVD deposition processes, the cooling water and heat-transfer oil flow control valves on reactors are critical. A sudden plant-wide air supply failure would cause the control valve to run out of control, leading to catastrophic thermal runaway. The GVL double-acting self-locking valve instantly detects the drop in network pressure and "freezes" the control valve at its current opening, maintaining dynamic temperature balance and buying critical time for backup air supply to engage.

2. Advanced Semiconductor Wafer Processes (e.g., Etching / Thin-Film Deposition)

○ Requirements and Fit: Specialty gas supply (such as silane and high-purity argon) in semiconductor cleanrooms demands extremely high cleanliness and flow stability. The GVL series' NPT dry-seal connection avoids particulate contamination. When the plant's main air line fails, the GVL uses its minimal 0.01 MPa actuation differential to instantly lock the pneumatic diaphragm valve, preventing violent fluid surges from disrupting vacuum chamber pressure and ensuring wafers are not scrapped.

3. Emergency Shutdown Systems (ESD) for Petrochemical and LNG Receiving Terminals

○ Requirements and Fit: At high-hazard petrochemical sites, when an air compressor unit goes down or a main pipeline ruptures, the Safety Instrumented s-ystem(SIS) requires the actuator to hold its "last known safe position." The GVL's high-pressure locking mechanism (0.7 MPa) firmly clamps the cylinders of large-bore ball or butterfly valves, preventing water-hammer effects or leaks/explosions caused by unintended valve drift.

Technical Specifications

Application Scenarios

The SKE GVL series is deeply suited to the demanding process requirements for pneumatic safety in the following high-potential markets:

1. Temperature Control for High-Nickel Ternary and Silicon-Carbon Anode Material Reactors

○ Requirements and Fit: In the synthesis of new-energy battery cathode/anode precursors or CVD deposition processes, the cooling water and heat-transfer oil flow control valves on reactors are critical. A sudden plant-wide air supply failure would cause the control valve to run out of control, leading to catastrophic thermal runaway. The GVL double-acting self-locking valve instantly detects the drop in network pressure and "freezes" the control valve at its current opening, maintaining dynamic temperature balance and buying critical time for backup air supply to engage.

2. Advanced Semiconductor Wafer Processes (e.g., Etching / Thin-Film Deposition)

○ Requirements and Fit: Specialty gas supply (such as silane and high-purity argon) in semiconductor cleanrooms demands extremely high cleanliness and flow stability. The GVL series' NPT dry-seal connection avoids particulate contamination. When the plant's main air line fails, the GVL uses its minimal 0.01 MPa actuation differential to instantly lock the pneumatic diaphragm valve, preventing violent fluid surges from disrupting vacuum chamber pressure and ensuring wafers are not scrapped.

3. Emergency Shutdown Systems (ESD) for Petrochemical and LNG Receiving Terminals

○ Requirements and Fit: At high-hazard petrochemical sites, when an air compressor unit goes down or a main pipeline ruptures, the Safety Instrumented s-ystem(SIS) requires the actuator to hold its "last known safe position." The GVL's high-pressure locking mechanism (0.7 MPa) firmly clamps the cylinders of large-bore ball or butterfly valves, preventing water-hammer effects or leaks/explosions caused by unintended valve drift.

                                  SKE GVL211-N02 (Double-Acting)    

                                SKE GVL201-N02 (Single-Acting)