Bistable Lever Pneumatic Valve | Aignep

The AIGNEP 01VL Series 1/4" BSPP Bistable Lever Valve is a manual spool-type directional valve actuated by a 90° lever, designed for compressed air control in industrial pneumatic systems without electrical dependence. Its bistable nature allows the valve to maintain its position when the lever is released without a return spring, unlike the monostable pull valve (01VT) which returns automatically. Available in 3/2 way (single-acting cylinder control) and 5/2 way (double-acting cylinder control) configurations. Manufactured in Italy by AIGNEP.

Comparison of 01V Series Manual Actuation Valves

• Bistable lever (01VL — this valve): Maintains position when released. Ideal for permanent manual circuit locking or operation mode selection.
• Monostable pull NC (01VT): Returns to closed position when released. Ideal for temporary manual activation.
• Mechanical by tappet (01VV): Actuation by automatic physical contact. Ideal for limit switches.

Bistable Lever Operation Principle

• Bistable: Maintains its position when the lever is released — no return spring.
• 90° Lever: Smooth switching with low actuation force.
• Balanced spool: Precise and repeatable operation in continuous cycles.
• No electricity: Pure mechanical control, ideal for areas without electrical supply or ATEX zones.

Applications

• Local and manual control of pneumatic cylinders, single-acting (3/2) and double-acting (5/2).
• Manual locking and venting of pneumatic lines in a fixed position.
• Selection of operating mode in pneumatic machines and test benches.
• Basic automation without electrical dependence.
• Manual intervention in industrial machinery and control panels.
• ATEX zones or areas without electrical supply where permanent manual control is required.

Technical Specifications

• Series: AIGNEP 01VL
• Type: Bistable lever valve, spool type
• 3/2 way reference: 01VL130003
• 5/2 way reference: 01VL150003
• Pneumatic connection: BSPP 1/4"
• Configurations: 3/2 way / 5/2 way
• Actuation: 90° manual lever
• Operation: Bistable — maintains position without return spring
• Country of manufacture: Italy
• Brand: Aignep

Equivalent to

• SMC VM131-01-34A (90° lever, 3/2 bistable) & VM531-01-34A (90° lever, 5/2 bistable)
• Festo VHER-H-B43-G14 bistable lever & VHER-H-B53-G14 bistable lever
• Camozzi Series 304 bistable lever 3/2, 1/4" & Series 305 bistable lever 5/2, 1/4"
• Norgren M/57 bistable lever 3/2 G1/4" & M/57 bistable lever 5/2 G1/4"
• Parker Series PVM bistable lever G1/4" & Series PVM bistable lever G1/4"
• Univer Series AE bistable lever 3/2 G1/4" & Series AE bistable lever 5/2 G1/4"

Other Common Names

This product is also known as: pneumatic lever valve, manual bistable lever valve, pneumatic cam valve, pneumatic selector valve, lever operated pneumatic valve, manual lever valve bistable pneumatic, toggle valve pneumatic 3/2 5/2 or AIGNEP 01VL lever valve.