Yuken Type CPDG Valve | CPDG-03-E CPDG-06-E | Pilot Controlled Check Valve

Yuken Type CPDG Series Pilot Controlled Check Valves

Product Overview: The CPDG Series consists of high-performance, subplate-mounted pilot-controlled check valves, engineered for hydraulic circuits requiring reliable pressure holding and load-locking. These valves allow free flow in one direction and remain blocked in the opposite direction until opened by a pilot pressure signal. Known for low cracking pressures, exceptional sealing, and minimal flow resistance, the CPDG series is an essential component for industrial presses, injection molding machines, and vertical load-locking systems.

This category integrates key configurations: the standard CPDG-03, the high-flow CPDG-06, and the E (Decompression) type models designed for shock-free operation.

Key Technical Advantages:

• Superior Pressure Holding: Featuring precision-ground, hardened valve seats, these valves ensure “zero leakage” in the closed position, providing long-term, stable locking for hydraulic cylinders.

• Decompression Feature (E-Type): Models such as CPDG-03-E and CPDG-06-E include a decompression poppet to release high pressure smoothly before main flow opens, eliminating system shock and water hammer.

• High Pressure Endurance: Cast from high-strength materials, the valve bodies support high-pressure applications up to 250 Bar – 315 Bar, meeting the demands of heavy-duty machinery.

• Versatile Cracking Pressures: Available with multiple spring options (e.g., 05, 20, 50) to suit various pilot control pressures and return-line backpressure environments.

Detailed Specifications & Parameters:

• Core Series: Yuken Type CPDG Series (Pilot Operated Check Valves).

• Featured Model Matrix:

  • CPDG-06-E-30-50 (Size 06, Decompression Type, High Cracking Pressure)

  • CPDG-03-E-20-50 (Size 03, Decompression Type, Standard Spec)

  • CPDG-06-05-20 / 75-E-20 / 75-20 (High-flow variants and sequence derivatives)

• Core Performance Specs:

  • Nominal Sizes: Size 03 (NG10), Size 06 (NG20 / NG25), Size 10 (NG32).

  • Max Operating Pressure: Rated up to 250 Bar (3,625 PSI).

  • Cracking Pressures: Available in 05 (0.5 Bar), 20 (2.0 Bar), and 50 (5.0 Bar) options.

  • Control Type: Pilot hydraulic controlled.

  • Design Sequences: 20, 30, 50 Series designs.