This is a modular, sectional, directional control valve designed to control the flow of hydraulic fluid to various actuators (like hydraulic cylinders or motors) on construction, agricultural, or material handling equipment. The “2 SPOOL” designation means it has two individual control sections (spools), each allowing an operator to control one function of a machine (e.g., lift arm, tilt bucket, extend boom).
The “SEO” suffix is a critical modifier, indicating this is a Spring-Centered, Electrical On/Off version of the valve. It is operated by simple 12V or 24V on/off solenoids, not proportional joysticks.
Breakdown of the Code: 025020103001000
Galtech part numbers are typically structured. While the exact schema can vary, a logical breakdown for this number is:
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02502: Series/Model Identifier. This defines the valve’s basic platform, size, pressure rating (likely up to 350 bar / 5000 psi), and flow capacity (likely in the range of 60-120 L/min). It specifies the internal design and physical dimensions of each valve section.
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01: Number of Spools. This confirms it’s a 2-spool valve (the first ‘0’ may be a placeholder or part of the series, but ’01’ often directly indicates 1 working section? Here, the description says 2 spool, so it’s likely a two-section valve built as a single unit. The ’01’ in the middle might refer to the spool type code. It’s safest to trust the written description: 2 SPOOL).
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03: Spool Type / Actuation Pattern. This code defines the internal flow path of the spool (e.g., A/B port blocked or open to tank in neutral) and its actuation. For an SEO valve, this spool type is a 3-position, spring-centered design.
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Positions: The spool has three positions: A, Neutral (center), and B.
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Actuation: It is moved by an electrical solenoid on each end (one for “A” direction, one for “B” direction). When neither solenoid is powered, springs return the spool to the center position.
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001000: Specific Configuration & Porting Code. This final segment specifies:
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Port sizes and threading (e.g., 3/4″ UNF, 1/2″ BSPP).
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Internal relief valve settings (if present in each section).
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Neutral center configuration (likely a “closed center” or “float” type for SEO).
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Option codes for special features.
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Key Features & Specifications
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Manufacturer: Galtech S.p.A. (Italy)
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Type: Modular Directional Control Valve
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Number of Sections: 2 Spools
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Actuation: Electrical On/Off Solenoids (SEO).
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Control Type: 3-Position, Spring-Centered.
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Position 1: Solenoid A energized → flow to work port A.
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Position 2: Neutral (Center): Both solenoids de-energized → springs hold spool in center. Work ports are typically blocked or connected to tank depending on the “03” center configuration.
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Position 3: Solenoid B energized → flow to work port B.
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Typical Applications: Used on machines where functions are activated by simple switches or buttons (e.g., dump truck tipping control, simple winch control, stabilizer legs, accessory functions) rather than precise proportional joysticks.
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Common Ports:
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P (Pressure In): From the hydraulic pump.
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T (Tank Return): To the hydraulic reservoir.
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A & B (Work Ports): To the hydraulic cylinder or motor.
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LS (Load Sense – if equipped): For advanced systems to optimize pump flow. (May not be present on all SEO models).
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