MOOG / Product familyProduct catalogues and documents ↓
Digital servo valves
D636 / D637
D636 and D637 are directly driven servo valves using a permanent-magnet linear motor. They include integrated electronics, an analog interface and optional Fieldbus depending on version, without pilot-oil consumption.
01Direct spool actuation
02Dynamics independent of pilot pressure
03Integrated electronics and configuration-specific setup
04Flow, pressure and axis control options depending on version
The model will be added to your request. The B.N. team will check its suitability for your operating conditions.
MOOG / TECHNICAL PRODUCT VIEW
APPLICATION & DESIGN
Understand the application.
Applications
- Presses and metalworking
- Dynamic testing
- Simulation
- Power-generation systems
Product features
- Direct spool actuation
- Dynamics independent of pilot pressure
- Integrated electronics and configuration-specific setup
- Flow, pressure and axis control options depending on version
TECHNICAL DATA
Data with a source.
| Parameter | Value and reference conditions |
|---|---|
| Mounting size | D636: ISO4401 size 03; D637: size 05 Source ↗ |
| Rated flow | D636: up to 40; D637: up to 100 L/min, at Δp of 35bar per spool land Source ↗ |
| Maximum flow | D636:75; D637:180 L/min — separate from rated flow Source ↗ |
| Maximum pressure P, A, B | 350bar Source ↗ |
| 0–100% step response | D636:8ms; D637:14ms, according to manufacturer conditions Source ↗ |
| Supply | 24VDC; range 18–32VDC Source ↗ |
| Command signals | ±10V, ±10mA, 4–20mA or optional Fieldbus interface depending on version Source ↗ |
Fieldbus is optional, not a feature of every D636/D637. T/Y pressures and supported functions vary by model; do not apply the P/A/B rating of 350bar to all ports.
DOCUMENTS & SOURCES
Professional information. Within reach.
D636/D637 catalogueEnglish · PDF · 36 Pages · 3.4 MB · Revision: D, May 2019 · Opens in a new tabD636/D637 product page and installation documentsOpens in a new tab
More documents in the information centre ←Sources checked: 2026-10-26. Check the revision and configuration when ordering.
MODELS & CONFIGURATIONS
Select a model. Explore the details.
| Model / series | Features |
|---|---|
| D636 | Size 03 / NG6; rated flow up to 40 L/min. |
| D637 | Size 05 / NG10; rated flow up to 100 L/min. |
YOUR APPLICATION
Your data. Our selection.
- Flow, pressure differential and pressure at every port
- Control function and communication protocol
- Fluid, filtration, viscosity and temperature
- Mounting pattern, Y drain, connector and failure-state requirement
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