Valtek VL series spring cylinder linear actuators are powerful, compact, high-performance pneumatic actuators that provide solid throttling or on-off operation for automatic control valves. The positioner supplies air to both sides of the piston, providing stiff, precise movement and high-frequency response and quick stroke speeds.
Additional information
| Type | Piston Cylinder |
|---|---|
| Action | Linear |
| Sizes | 25, 50, 100, 200, 300, 400, 600 |
| Fluid Power | Pneumatic |
| Pressure Rating | 150 psig |
| Life Cycles | Standard: 150,000 to 500,000; UHC Design: 2,000,000 |
| Fail Safe Operation | Last, Closed, Open |
| Enclosure | Zinc Plated Steel, Painted Carbon Steel, Painted Anodized Aluminum |
| Manual Override | Side-Mounted, Top-Mounted and Push-Only Handwheel |
| Options | Ultra High Cycle, Extended Spring, Carbon Steel Cylinder, Fail Last Lock-Ups, External Volume Tanks |
Features & Benefits
- Double-acting configuration responds quickly to signal changes
- Supply pressure is modulated to both sides of piston for stiff, precise actuator operation
- Small air volume between the piston and the bottom of the cylinder provides powerful pneumatic stiffness, without plug slamming
- Cylinder design uses less supply air than comparable diaphragm actuators
- 150 psi (10.3 Bar) operating pressure allows substantially higher thrust capabilities than comparable diaphragm actuators
- Longer strokes provide better process control, VL25 has a 11/2-inch (38 mm) stroke, compared to linear diaphragm actuator with 3/4-inch (19 mm) stroke
- For easier installation and maintenance, spring cylinder linear actuators are substantially lighter and more compact than comparable linear diaphragm actuators
- Periodic maintenance is easy to perform since the spring cylinder actuator only requires the removal of three parts to access all internal parts
- Spring cylinder linear actuators have one-third the number of parts as diaphragm linear actuators; wear parts cost 10 percent of those for diaphragms, and less inventory is required to maintain actuators
- Failure mode is easily reversed without additional parts
