HD – ZDB/Z2DB6 – Pilot Operated Pressure Relief Valve

Maximize your manifold space and ensure absolute system safety with the HD ZDB/Z2DB Series Pilot Operated Pressure Relief Valve. Available through THM Hydraulics, this highly efficient component is designed specifically as a sandwich plate valve for vertical stacking assemblies. By utilizing a highly responsive pilot-operated mechanism, it delivers precise, chatter-free overpressure protection without the need for bulky external piping. Comfortably managing operating pressures up to 315 bar and flow rates up to 100 L/min, the ZDB/Z2DB series provides the compact, reliable pressure control essential for modern, high-density industrial and mobile hydraulic systems.

Core Technical Specifications:-

Component Architecture: Pilot Operated Sandwich Pressure Relief Valve
Model Type: HD-ZDB (Single Cartridge) / HD-Z2DB (Double Cartridge)
Maximum Operating Pressure: Up to 315 bar
Maximum Flow Capacity: Up to 100 L/min
Pressure Ranges: 50, 100, 200, and 315 bar configurations
Pressure Adjustment: 3 distinct optional adjustment elements
Mounting Style: Sandwich plate for vertical stacking assemblies
Circuit Configurations: 5 circuit options for Size 6, and 6 circuit options for Size 10

Key Features & Engineering Advantages:-

Space-Saving Vertical Stacking: The sandwich plate design allows the valve to be stacked directly under directional control valves on standard manifold blocks. This drastically reduces the physical footprint of your hydraulic circuit and minimizes potential external leak points.
Single or Double Cartridge Options: Choose the ZDB model (equipped with one relief cartridge) for protecting a single specific line, or the Z2DB model (equipped with two cartridges) for dual-line protection within the same compact valve body.
Extensive Circuit Customization: With 5 circuit options for Size 6 and 6 circuit options for Size 10, hydraulic engineers can precisely configure the valve to relieve pressure in the A, B, P, or T lines according to the exact needs of the schematic.
Smooth Pilot-Operated Relief: The internal pilot stage reacts instantly to pressure spikes, opening the main poppet gradually to safely vent up to 100 L/min of fluid. This eliminates the violent hydraulic shock often associated with direct-acting valves.
4 Precision Pressure Ranges: Select the exact maximum pressure threshold your system requires—from a sensitive 50 bar up to a heavy-duty 315 bar limit—guaranteeing the valve cracks open only when necessary.
3 Custom Adjustment Elements: Tailor the valve’s mechanical tuning mechanism to easily calibrate the pressure setting and securely lock it against heavy machine vibrations.

Ideal Industry Applications:-

The compact sandwich design and reliable overpressure protection make the HD ZDB/Z2DB Series the premier choice for:

Machine Tooling & CNC: Providing critical, space-saving circuit protection within the high-density manifolds of automated manufacturing centers and robotic cells.
Compact Hydraulic Power Units (HPUs): Saving vital space in small-scale power packs used for material handling, lifts, and mobile equipment.
Injection Molding & Plastics: Precisely controlling and relieving pressure on auxiliary clamping and core-pull circuits without adding external bulk.
Industrial Automation: Ensuring safe, consistent pressure limits on complex indexing tables and automated assembly line machinery.

Why Choose the HD ZDB/Z2DB Series?

Shrink Your System Footprint: By integrating your relief valves vertically into the stack, you free up valuable horizontal space on your manifold block, allowing for smaller, more efficient machine designs.
Tailored Circuit Protection: With the option for one or two cartridges and multiple circuit configurations, you aren't forced into a "one-size-fits-all" solution. You can protect exactly the lines that need it.
Zero Plumbing Headaches: Sandwich plates eliminate the need for cutting, threading, and installing external steel lines, dramatically speeding up your machine assembly time and reducing labor costs.