MTCV-02W MTCV-03W MTCV-06A Yuken Modular Throttle Check Valve 31.5 MPa

Product Overview

The MTCV Series modular throttle check valves are classic modular hydraulic control components from the Yuken brand family, integrating both throttling and check valve functions in a single compact unit. The series features a sandwich (modular) mounting design, allowing direct stacking between the directional valve and the manifold block without additional piping — enabling compact and modular hydraulic system layout.

The series covers the following sizes and models:

Among the above, MTCV-02W, MTCV-03W, and MTCV-06A are typical representative models. Model code breakdown:

• MTCV: Modular Throttle & Check Valve

• 02 / 03 / 04 / 06: Nominal size

• A / B / W: Control oil port — A indicates A-port throttling, B indicates B-port throttling, W indicates A & B-port simultaneous throttling

• O / I: Control position — O indicates Meter-out (output control), I indicates Meter-in (input control)

As a high-performance alternative to genuine Yuken series products, this valve delivers full performance parity with Yuken original specifications, featuring 100% form-fit-function interchangeability — mounting interfaces and dimensions are identical to the original, enabling direct replacement without manifold modifications. Every unit undergoes 100% simulated in-service testing prior to shipment, ensuring proven reliability under real-world operating conditions.

Technical Specifications (Bulleted List)

MTCV-02 Series (Size 02, 1/4″)

• Series: MTCV Modular Throttle Check Valve

• Nominal Diameter: 1/4″ (approx. 6mm)

• Maximum Operating Pressure: 25 MPa (250 kgf/cm²)

• Maximum Flow: 35 – 45 L/min

• Weight: MTCV-02A/B – 1.3 kg; MTCV-02W – 1.4 kg

• Adjustment Type: A/B/W oil port configurations; O (Meter-out) or I (Meter-in) options

• Knob Type: K – Handwheel knob adjustment / L – Inner hexagon bolt adjustment

• Connection Type: Sandwich (subplate mounting)

• Body Material: Cast Iron

• Seal Material: NBR

• Hydraulic Fluid: Mineral oil (per DIN 51524)

• Temperature Range: -15℃ to +70℃

MTCV-03 Series (Size 03, 3/8″)

• Series: MTCV Modular Throttle Check Valve

• Nominal Diameter: 3/8″ (approx. 10mm)

• Maximum Operating Pressure: 25 – 31.5 MPa

• Maximum Flow: 70 – 90 L/min

• Weight: MTCV-03A/B – 2.7 kg; MTCV-03W – 2.8 – 3.0 kg

• Adjustment Type: A/B/W oil port configurations; O (Meter-out) or I (Meter-in) options

• Knob Type: K – Handwheel knob adjustment / L – Inner hexagon bolt adjustment

• Connection Type: Sandwich (subplate mounting)

• Body Material: Cast Iron

• Seal Material: NBR

• Hydraulic Fluid: Mineral oil

• Temperature Range: -15℃ to +70℃

MTCV-04 Series (Size 04, 1/2″)

• Maximum Operating Pressure: 25 MPa

• Maximum Flow: 120 – 200 L/min

• Weight: MTCV-04A/B – 7.5 kg; MTCV-04W – approx. 6 – 7.5 kg

MTCV-06 Series (Size 06, 3/4″)

• Maximum Operating Pressure: 25 MPa

• Maximum Flow: 300 – 500 L/min

• Weight: MTCV-06A/B – 13 kg; MTCV-06W – approx. 12.5 kg

Key Technical Advantages

1. Sandwich Modular Design for Efficient System Integration

The MTCV series features a sandwich mounting design, allowing the valve body to be stacked directly between the solenoid directional valve and the manifold block. This eliminates the need for additional piping, greatly simplifying hydraulic system layout and assembly, saving installation space, and reducing system leakage, vibration, and noise. The modular design enables extremely flexible configuration of hydraulic systems based on functional requirements.

2. Integrated Throttling and Check Valve Function for Simplified Circuit Design

Each valve body integrates both throttling and check valve functions — in the throttling direction, flow rate is precisely controlled via a handle or inner hexagon bolt; in the reverse direction, the check valve automatically opens to enable free, unthrottled flow. Two functions in one valve, effectively reducing the number of valve components and piping connections in the system.

3. Multiple Control Oil Ports and Adjustment Options for Flexible Selection

• Three oil circuit configurations — A (A-port throttling) , B (B-port throttling) , W (A & B-port simultaneous throttling) 

• Two throttling modes — O (Meter-out) and I (Meter-in) 

• Two adjustment types — K (Handwheel knob) and L (Inner hexagon bolt) 
  This diverse configuration system provides engineers with exceptional selection flexibility.

4. Precision Cast Body with Reliable Sealing for Long Service Life

The valve body is manufactured from high-quality cast iron through precision casting, with precision-machined spool and seat mating surfaces for superior sealing performance. NBR seals offer excellent oil resistance and wear resistance, ensuring reliable operation under long-term high-pressure conditions.

5. Broad Size Coverage for Diverse Flow Requirements

The MTCV series covers four sizes from 02 (1/4″) to 06 (3/4″), with flow ranges from 35 L/min to 500 L/min. Whether for low-flow precision regulation or high-flow system control, a suitable model is available.

Application Areas

• Actuator Speed Control: Installed at the inlet or outlet of hydraulic cylinders or motors to precisely control actuator speed by regulating flow

• Differential Circuits: Provides one-way throttling control in differential connection circuits

• Feed and Fast-Retract Circuits: Enables speed switching control in machine tool feed systems

• Modular Valve Stack Integration: As a core component of modular valve stacks, combined with directional valves, pressure valves, and other components on integrated manifolds

• Target Equipment: Injection molding machine hydraulic systems, CNC machine tool hydraulic systems, machining centers, metallurgical equipment hydraulic systems, automated production lines, hydraulic fixtures, and more

Expert Maintenance Tips

1. Mounting Surface Cleaning: Thoroughly clean the manifold mounting surface and all ports prior to installation to remove oil residue, chips, and contaminants. Inspect all O-ring seal grooves on the mounting surface for damage.

2. O-Ring Replacement: Replace all O-ring seals on the sandwich mounting surfaces after every disassembly. Use original-equivalent NBR seals for optimal performance.

3. Torque Control: Tighten mounting bolts in a diagonal sequence using a torque wrench in gradual increments. Avoid over-tightening on one side, which may cause valve body distortion or seal failure. Refer to the product installation manual for specific torque values.

4. Flow Adjustment Operation: When adjusting flow, first loosen the lock nut. Turn clockwise to decrease orifice opening (reduce flow) and counterclockwise to increase opening (increase flow). After adjustment, securely tighten the lock nut to prevent setting drift from vibration during operation.

5. Fluid Cleanliness Management: Maintain system fluid cleanliness at ISO 4406 Class 18/16/13 or higher. Install a filter with ≤10μm rating in the return line where feasible.

6. Periodic Functional Testing: Test the throttling characteristics and check valve sealing performance every 2,000 operating hours or annually. If throttling adjustment becomes ineffective or reverse leakage is detected, disassemble and inspect the spool and seat for wear — replace the valve cartridge assembly if necessary.