Festo VUVS-L25-B52-D-G14-FN – 5/2 Bistable Solenoid Valve | 1300 l/min G1/4 | Murali Pneumatics Coimbatore
The Festo VUVS-L25-B52-D-G14-FN is a 5/2 bistable directional control valve from the VUVS series, pilot-actuated with internal pilot air supply and a detenting manual override. It delivers a high nominal flow rate of 1300 l/min through G1/4 ports and is built on a piston gate valve design with soft sealing — making it well-suited for demanding continuous-duty pneumatic circuits. The bistable function means the valve holds its last switched position even when electrical power is removed, ideal for fail-safe and energy-saving applications. This is a valve body only — coil, plug socket, and any manifold hardware must be ordered separately. Festo Part Number: 8192989. Available with Murali Pneumatics, your authorized Festo dealer in Coimbatore.
Product Description
Festo VUVS-L25-B52-D-G14-FN — 5/2 Bistable Solenoid Valve Overview
The VUVS-L25-B52-D-G14-FN belongs to Festo's VUVS series of compact, high-flow directional control valves — a workhorse range trusted in high-cycle industrial applications across the world. This particular variant is a 5/2 bistable valve: once energised to either position, it stays there without requiring continuous current, making it intrinsically suited to energy-efficient and fail-safe circuit designs. With a nominal flow rate of 1300 l/min at valve size 26.5 mm and G1/4 all-port connections, it punches well above the weight of valves in its size class.
Key Features
- 5/2 Bistable Function — holds last switched position without power; ideal for cylinder lock-in-place and safety-critical sequences where air supply failure must not cause unwanted movement.
- High Nominal Flow Rate of 1300 l/min — supports fast cylinder cycle times even on bore sizes up to 63 mm; reduces pressure drop across the valve in high-throughput lines.
- Pilot-Actuated with Internal Pilot Supply — no separate pilot airline needed; simplifies manifold plumbing and reduces installation time significantly.
- Detenting Manual Override — latches in override position without needing to hold it, enabling safe manual machine jogging and maintenance cycling without a tool.
- ATEX-Certified (Zones 1, 2, 21, 22) — suitable for use in potentially explosive atmospheres; expands deployment options to chemical processing, paint shops, and solvent-handling lines.
- Cleanroom Class 6 (ISO 14644-1) — measured per ISO 14644-14; suitable for pharmaceutical packaging, medical device assembly, and electronics production environments.
- LABS / PWIS Conformity (VDMA 24364-B1/B2-L) — paint-wetting impairment substance free; essential for automotive body shop and painting line applications.
- Soft Sealing Piston Gate Valve Design — provides tight shut-off and smooth, low-friction switching; contributes to the long service life VUVS valves are known for.
- Exhaust-Air Flow Control Option — built-in provision for flow control on exhaust ports; allows cylinder speed adjustment without external meter-out valves on each port.
- Corrosion Resistance Class 2 — suitable for moderate corrosive environments including textile humidification systems and coastal industrial zones.
Technical Specifications
| Parameter | Value |
|---|---|
| Festo Part Number | 8192989 |
| Model Number | VUVS-L25-B52-D-G14-FN |
| Series | VUVS |
| Valve Function | 5/2 Bistable |
| Type of Actuation | Electric (Solenoid Pilot) |
| Type of Piloting | Pilot actuated |
| Pilot Air Supply | Internal |
| Pilot Pressure | 1.5 bar … 8 bar (0.15 MPa … 0.8 MPa) |
| Valve Size | 26.5 mm |
| Nominal Flow Rate | 1300 l/min (standardised to DIN 1343) |
| C Value | 5.6 l/s·bar |
| b Value | 0.4 |
| Pneumatic Connection — Port 1 (Supply) | G1/4 |
| Pneumatic Connection — Port 2 (Working A) | G1/4 |
| Pneumatic Connection — Port 3 (Exhaust) | G1/4 |
| Pneumatic Connection — Port 4 (Working B) | G1/4 |
| Pneumatic Connection — Port 5 (Exhaust) | G1/4 |
| Breather Connection | Not ducted |
| Operating Pressure | 1.5 bar … 8 bar (0.15 MPa … 0.8 MPa) |
| Design | Piston gate valve |
| Sealing Principle | Soft |
| Manual Override | Detenting |
| Exhaust-Air Function | With flow control option |
| Flow Direction | Non-reversible |
| Lap | Overlap |
| Switching Time (Reversal) | 27 ms |
| Mounting Position | Optional (any orientation) |
| Operating Medium | Compressed air to ISO 8573-1:2010 [7:4:4] |
| Note on Operating Medium | Lubricated operation possible (lubrication then always required) |
| Media Temperature Range | -10 °C … +60 °C |
| Ambient Temperature Range | -10 °C … +60 °C |
| Housing Material | Die-cast aluminium, painted |
| Piston Slide Material | Wrought aluminium alloy |
| Seal Material | HNBR / NBR |
| Screw Material | Galvanised steel |
| Weight | 324 g |
| Corrosion Resistance Class (CRC) | 2 — Moderate corrosion stress |
| LABS (PWIS) Conformity | VDMA 24364-B1/B2-L |
| Cleanroom Suitability | Class 6 per ISO 14644-1 (measured per ISO 14644-14) |
| Explosion Protection (ATEX) | Zone 1, Zone 2, Zone 21, Zone 22 |
| Vibration Resistance | Transport severity level 2 per FN 942017-4 / EN 60068-2-6 |
| Shock Resistance | Shock severity level 2 per FN 942017-5 / EN 60068-2-27 |
| RoHS Compliance | Yes |
Common Applications
- Textile Machinery — loom actuator sequencing, warp tension control cylinders, and rapier drive pneumatics where bistable operation saves energy during long dwell periods.
- CNC Machine Tools and Machining Centres — fixture clamping, tool-change pneumatics, and pallet locking where the valve must hold position if the machine control power is cut.
- Plastic Injection Moulding — core pull circuits and ejector pin drives where fast cycle time and reliable position retention are critical to part quality.
- Automotive Assembly and Paint Shops — LABS conformity makes this valve directly usable in body-in-white lines, paint booths, and sealant application cells without risk of paint fish-eye defects.
- Pharmaceutical Packaging Lines — cleanroom class 6 rating supports use in blister pack, vial, and tablet handling automation in validated environments.
- Chemical and Solvent Handling — ATEX certification (Zones 1, 2, 21, 22) allows deployment in drum-filling stations, solvent transfer systems, and hazardous-area process equipment.
Why Buy from Murali Pneumatics?
- Authorized Festo Channel Partner since 1991 — over three decades of supplying genuine Festo products to Coimbatore's industrial base; we know these products inside out.
- 100% Genuine Products with Full Festo Warranty — every product is sourced directly through Festo's authorized distribution chain; no grey-market or counterfeit risk.
- Ready Stock of Popular VUVS Models — common variants stocked at our Mill Road store; walk in or call and we can often fulfill same-day for urgent breakdowns.
- Expert Technical Support — need help selecting the right coil voltage, socket type, or manifold configuration? Call us at +91 98422 47546 — our team can specify the complete assembly for you.
Compatible Accessories
- Solenoid Coils — available in 24V DC, 110V AC, 230V AC, and other voltages; must be ordered separately to complete the electrical actuation assembly.
- Plug Sockets (DIN Form A/B/C) — connector sockets with or without LED indicator and surge protection; specify voltage when ordering.
- Manifold Blocks (VUVS series) — sub-base manifolds for multi-valve station mounting; reduces plumbing complexity significantly on multi-actuator circuits.
- Silencers (U-series) — for ports 3 and 5 exhaust on standalone installations; reduces noise and prevents dust ingress through exhaust ports.
- Push-In Fittings (QS-G1/4 series) — Festo QS G1/4 fittings for 6 mm, 8 mm, 10 mm, or 12 mm tube; match tube OD to cylinder bore for correct flow sizing.
- Pneumatic Tubing (PUN / PLN series) — Festo polyurethane or nylon tubing in sizes compatible with G1/4 fittings.
- Flow Control Valves (GRLA / GRLZ series) — for meter-out speed control on cylinder working ports 2 and 4.
All accessories available from stock. Ask us to bundle your complete assembly.
