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4057 / 4457 Manual & Pilot Operated 3-Way Pilot Valves
AMOT Models 4057 and 4457 3-way valves have been developed for use in manual and automatic hydraulic or pneumatic control systems. They offer versatility in operating requirements and allowable pressure limits. For a 1/4” size control valve, they offer exceptional flow capacity.
Note: This product replaces model 4459.
Features and Benefits
- Balanced force design pressure
- Can be applied to any port center dead spot-std
- Port overlap-optional
- Arranged for panel or bracket mounting
- Available in Aluminum or 316 Stainless Steel
Specifications
| Body material: | 4057 | Precision cast aluminum |
| 4457 | Stainless steel | |
| Standard spool material: | Anodized aluminum | |
| Standard seal material: | Viton | |
| Max. pressure at Ports 1,2 or 3: | 860 kPa | 125 psi |
| Max. pressure at Ports A or B: | 1034 kPa | 150psi |
| Max. pressure at Port C: | 860 kPa | 125 psi |
Applications
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Hydraulic Fluid Control
-
Actuator Control
-
Pneumatic Panel Systems
-
Safety Control Systems
Operation
The 3-way pilot valves feature modular construction and incorporate a sliding spool. The standard spool has a small center dead spot position and no valve port overlap. With the spool fully to the left (rest position), Port 2 is open to Port 3 and Port 1 is closed. With the spool moved to the right (actuated position), Port 2 is open to Port 1 and Port 3 is closed. The valves are available with a variety of manual and pressure operators and with manual, pressure or spring returns.