The VF Series direct-acting solenoid valve from A&T Fluid Solutions is designed for direct mounting on pneumatic cylinder ports, creating a compact valve-cylinder assembly without intermediate tubing. This 3/2 normally closed (NC) configuration controls both single-effect cylinders (spring or gravity return) and double-effect cylinders, providing flexible automation control in a space-saving package.

Which Pneumatic Cylinders Is the VF Series Compatible With?

The VF Series mounts directly onto cylinders conforming to ISO 6432, ISO 15552, and ISO 21287 standards, as well as short-stroke and compact guide cylinders. The valve body features a G1/8" air inlet port and connects to the cylinder via G1/8" or G1/4" fixing screws, depending on the cylinder model. This direct-port mounting approach eliminates the need for fittings and tubing between the valve and actuator, reducing potential leak points and simplifying assembly.

What Electrical Voltage Options Are Available for the VF Series?

The solenoid coil is available in multiple voltage configurations to suit different control system requirements:

• DC operation: 12V DC, 24V DC
• AC operation: 24V AC, 110V AC, 220V AC

An integrated screw-type manual override allows operators to actuate the valve manually during setup and testing without electrical power.

Frequently Asked Questions

Can the VF Series control both single-effect and double-effect cylinders?

Yes. The VF Series supports single-effect cylinders (spring or gravity return) with a single valve, or double-effect cylinders with two valves — one on each cylinder feed. Both configurations are possible on the same valve platform.

How does direct-acting operation differ from pilot-operated valves?

Direct-acting solenoid valves operate from 0 bar minimum pressure, making them suitable for vacuum and low-pressure applications where pilot-operated valves require a minimum pressure differential to shift. This also enables the VF Series to function reliably with fluctuating supply pressure.