MSTCV Series Modular Solenoid Operated Throttle Check Valves

Overview

The MSTCV Series is a modular stackable electro-hydraulic one-way throttle valve designed for precise flow control in hydraulic systems. This compact, sandwich-type valve combines the functions of a throttle valve and a check valve with solenoid-operated control, enabling automated flow regulation in both directions of hydraulic circuit operation.

Key Functions

Working Principle

• Free Flow Direction: Hydraulic fluid passes through the check valve with minimal pressure drop, allowing rapid actuator movement in one direction

• Controlled Flow Direction: When the solenoid is energized, the throttle valve opens to a preset adjustable position, restricting flow and controlling actuator speed in the reverse direction

• Fail-Safe Position: When de-energized, the valve returns to its default state (normally closed or normally open, depending on configuration)

Primary Applications

1. Injection Molding Machines

• Controls mold opening/closing speeds to prevent shock and damage

• Ensures smooth ejector pin movement with adjustable return speed

2. Machine Tools

• Regulates rapid traverse vs. working feed rates in hydraulic slides

• Provides smooth deceleration at stroke ends to eliminate mechanical impact

3. Mobile Hydraulic Equipment

• Manages boom/arm lowering speeds on excavators and cranes

• Prevents uncontrolled descent of heavy loads through meter-out control

4. Press Machinery

• Controls pressing speed and return stroke independently

• Enables dwell time adjustment through precise flow limitation

5. Material Handling Systems

• Regulates conveyor lift/lower speeds in automated warehouses

• Provides soft start/stop for hydraulic elevators and lifting platforms

Detailed Usage Scenarios

Scenario A: Dual-Speed Hydraulic Cylinder Circuit

Configuration: MSTCV mounted between directional valve and cylinder
Operation: 
- Extend: Free flow through check valve → Rapid advance
- Retract: Solenoid ON → Throttled flow → Controlled return speed
Benefit: Eliminates need for dual pump or complex valving arrangements

Scenario B: Meter-Out Control for Load Holding

Application: Vertical hydraulic press with heavy upper platen
Function: Prevents load drop when directional valve centers
Advantage: Throttle on outlet side maintains back pressure for stability

Scenario C: Automated Production Line Integration

Integration: PLC-controlled solenoid enables two-speed operation
Speed 1: Solenoid OFF → Fast approach (check valve bypass)
Speed 2: Solenoid ON → Slow working feed (throttle active)
Result: Cycle time optimization with process-appropriate speeds

Technical Advantages

• Space-Efficient Design: Eliminates need for separate inline valves and associated plumbing

• Leak-Free Stacking: Precision-machined mounting surfaces with O-ring seals

• Adjustable Response: Knob-type throttle adjustment with locking mechanism prevents drift

• Standardized Interface: Compatible with global NG6/Cetop 3/D03 modular valve standards

• Multiple Voltage Options: Available in 12V DC, 24V DC, 110V AC, and 220V AC coil configurations

Installation Considerations

1. Mounting Position: May be installed in any orientation; vertical stacking recommended for compact manifold design

2. Flow Direction: Arrow markings indicate preferred free-flow direction

3. Adjustment Access: Ensure knob accessibility for in-service flow rate modifications

4. Electrical Connection: DIN 43650 connector standard; verify voltage compatibility before energization

This valve is ideal for engineers seeking to combine flow control flexibility with space-saving modular architecture in modern hydraulic power units.