Pilot operated check valves

Product catalog summary

Pilot Operated Check Valves Overview
Pilot Operated Check Valves (POCVs) are essential for controlling pneumatic cylinders, ensuring automatic stoppage if power is lost. They are available in single (Type A and B) and dual (Type C) configurations, with dual valves offering combined functions in a compact form.

Specifications
- Temperature Range: 40° to 175°F (4° to 80°C)
- Flow Media: Filtered air, 5 micron recommended
- Inlet Pressure: 15 to 150 psig (1 to 10 bar)
- Signal Pressure: Must match or exceed inlet
- Port Threads: NPT standard, BSPP available

Valve Types and Applications
Type A and B: Suitable for high-flow or remote control, with pressure relief options.
Type C: Combines two check functions, minimizing external connections.

Installation and Troubleshooting
- Install near the cylinder to reduce bounce and drift.
- Use non-expandable hoses.
- Check for leaks using soapy water.

Application Circuits
Includes circuits for various applications like horizontal/vertical cylinders and overhead lifter circuits, with options for soft startup using EEZ-ON® valves.

Important Notes and Cautions
- Cylinder movement may occur if inlet pressure is lost.
- Install flow control valves between the check valve and cylinder.
- Rapid cylinder movement may occur upon system pressurization after air supply is off.

Specifications for ROSS Valves
Includes EEZ-ON®, L-O-X®, and flow control valves with a temperature range of 15° to 160°F (-10° to 70°C) and operating pressure of 15 to 150 psig (1 to 10 bar).

Procedures
Ensure all energy sources are off before servicing. Only trained personnel should handle ROSS products, and valves must be tested post-service.

Norms and Standards
Adherence to standards like OSHA 29 CFR 1910.147, EN 1037, and ISO 13849-1 is crucial.

Recommendations
Avoid restricting exhausts and ensure simultaneous solenoid energization. Regular leak checks are advised.

Applications
Used in rodless cylinders, air motors, and part loaders. EEZ-ON® valves offer soft starts, while L-O-X® valves provide lockable shutoff.

Key Features of Valves
EEZ-ON® valves allow controlled air pressure buildup. Flow control valves offer high airflow with adjustable outflow. L-O-X® valves serve as energy isolation devices.

Data Summary
Includes tables with model numbers, port sizes, and Cv values, along with dimensions and torque specifications.

Safety Applications
ROSS provides safety-related pneumatic products, emphasizing risk assessment and standard adherence.

Filtration and Lubrication
Use a 5-micron filter to clean air supply. Avoid certain fluids and use compatible lubricants.

Avoid Intake/Exhaust Restriction
Ensure unrestricted airflow in supply lines and exhaust ports. Use adequate exhaust silencers.

Power Presses
Use a press control double valve with monitoring for safety in pneumatically controlled machinery.

Energy Isolation/Emergency Stop
ROSS L-O-X® products are for energy isolation, not emergency stops.

Preassembled Wiring Kits
Available for Series SV27 Sensing PO Check Valves, requiring two kits for redundant valves.

Contact Information
ROSS offers global support and guidance for product selection, with contact details for worldwide offices.