LVD20-S07: Pure Pneumatic Control, Reliable Switching! Pilot-Operated Air Valve Empowers Safety and Harsh Environments

In special working conditions such as explosive atmospheres, high temperature, high humidity, or strong electromagnetic interference – where solenoid valves are unsuitable or pure pneumatic logic control is required – the air-piloted valve (also known as a pilot-operated pneumatic directional valve) is an ideal choice due to its lack of electrical components and intrinsic safety. The LVD20-S07 is a pilot-operated pneumatic directional valve. It uses an externally supplied pilot air signal to actuate the main spool, enabling flow path switching and control. It is a core component for building safe and reliable pneumatic systems.Core Product Advantages

• Purely Pneumatic Operation, Intrinsically Safe & Explosion-ProofRequires no electrical power. Actuation is driven by the pressure of an external pilot air signal, eliminating the risk of electrical sparks. Meets the highest explosion-proof requirements (e.g., for hazardous environments like chemical plants, mines, oil and gas).
• Pilot-Operated for High Flow ControlUtilizes a pilot-operated design. A small-flow, low-pressure pilot air signal (typically 0.1-0.8 MPa) controls the switching of the high-flow main air path. This requires minimal actuation force and ensures a fast response speed.
• Flexible Double-Pressure / Single-Pressure ControlCan be configured as single air-piloted with spring return (spool returns via spring when signal is removed) or double air-piloted (with memory function, where spool position is determined by the last applied pilot signal), adapting to different control logic needs.
• High Reliability & DurabilityValve body and internal moving parts are made of metal, offering wear and corrosion resistance. Suitable for harsh environments and provides a long service life.
• Manual Override FunctionUsually includes a manual override mechanism (push-pull or rotary type), facilitating debugging, system start-up, or emergency intervention.

Typical Application Scenarios

• Explosive Atmospheres:​ Pneumatic equipment control in hazardous areas like chemical plants, coal mines, and oil/gas platforms.
• Harsh Environments:​ Situations unsuitable for electronic components, such as high temperature, high humidity, or strong EMI.
• Pilot Control for Main Valves:​ Serving as the pilot valve for large pneumatic valves, enabling remote control or low-pressure control of high-pressure, high-flow systems.
• Safety Circuits:​ Acting as the final execution unit in safety systems, driven by air signals from safety valves or two-hand triggering devices.

Technical Parameters (Typical Values)

• Valve Function:​ 5-port, 2-position (5/2-way) or 3-port, 2-position (3/2-way, etc.)
• Port Size:​ G1/4″ or G1/8″ (common)
• Pilot Control Pressure:​ 0.1 ~ 0.8 MPa
• Operating Pressure:​ 0.1 ~ 0.8 MPa (main air path)
• Operating Temperature:​ -5°C ~ +80°C (dependent on seal material)

SummaryThe LVD20-S07 air-piloted valve is the “reliable guardian” of pneumatic control in special working conditions. Its purely pneumatic operation solves control challenges in explosive and harsh environments, providing a simple, reliable, and intrinsically safe solution for pilot control and safety circuits.Choosing the LVD20-S07 means choosing to build a safe and reliable pneumatic control barrier for your critical applications!