Hydraulic Servo Valves for Ceramic Pressing

Name: Domin P6 Pro
Brand: Domin

Domin hydraulic servo valves give hydraulic presses used in ceramic pressing precise, closed‑loop control of ram speed, pressure, and cycle repeatability. In these applications, the quality of control directly affects part consistency, scrap rates, and overall process stability. By metering hydraulic flow and pressure more accurately than conventional directional or proportional valves, Domin servo valves help presses hold target pressure and repeat the same motion profile reliably.

domin blue hydraulic proportional valve P6 pro series

The Challenges of Hydraulic Control in Ceramic Pressing

Applications like ceramic pressing require very precise control. Unlike many plastics, which can deform and redistribute stress and often leave the mold close to their final shape, ceramics are much less forgiving. Ceramics are brittle with weaker tension. Stress from bad pressing, especially during decompression, shows up as cracks that can propagate and cause failure later.

Why Servo Valves are the Right Approach

Domin hydraulic servo valves give ceramic presses precise, stable control.

Consistency and repeatability: Domin valves offer high usable frequency response (P6 Pro: >100 Hz at ±25% signal), enabling the control system to make rapid, small corrections during filling, compaction, dwell, and decompression. Discover how this Domin servo valves offer high clamping force control in molding.
Dynamic response: Domin valves are designed for high dynamic performance and fine control resolution, which suits applications like ceramic presses that depend on accurately shaped pressure–time and position–time curves.
Contamination resistant design: Domin has optimized their direct drive design with efficient flow galleries and has reduced the number of wear‑prone and contamination‑sensitive components in the valve.

Our Recommended Valves – P6

The P6 Pro is a popular choice for NG06 manifolds and is designed for industrial and automation applications such as ceramic pressing. In this application, the P6 Pro offers precise, repeatable pressure and flow control with low leakage and fast response matched to small and mid‑sized presses. With valve hysteresis as low as 0.2%, the P6 Pro consistently meters the same flow for the same command signal from cycle to cycle, helping the press apply consistent force so parts remain the same from the first shot to the last. Learn more about Domin Proportional Valves for injection molding.

Flow Rate	2.6 to 10.6 gpm (5 to 40 lpm)
Leakage at 100 bar	<0.13 gpm (<0.5 lpm)
Response Time at 100% Step Input	<10 ms
Frequency Response	>100 Hz
Hysteresis	<0.2%
Mass	1.39 lbs (0.63 kg)

FAQ for Ceramic Pressing

In an open-loop hydraulic press, the valve gets a command, but the real pressure can drift as temperature, oil viscosity, and components change over time. In closed-loop systems, sensors measure the actual pressure (and often the ram position), and the controller constantly adjusts the servo valve so the ram follows the programmed press curve, not just an approximation. This is most important during dwell, when pressure must stay steady, and during decompression, when a pressure spike can crack the part while it is still fragile from pressing.

Domin servo valves are well suited for ceramic pressing due to the high frequency rate, dynamic response, and repeatability, and contamination resistant design. Learn more about how hydraulic servo valves work in rubber injection molding applications.

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