Product Overview
The SMC SGC421B-1025Y-5DZ is a precision-engineered coolant valve from SMC’s SGC series, designed specifically for controlled on/off regulation of coolant and cutting fluid circuits in industrial machining environments. Operating as a pneumatically actuated process valve, it utilizes an external pilot air signal to shift an internal spool or poppet mechanism, allowing reliable, high-cycle switching of coolant media without direct electrical contact with the fluid path. This valve is a critical flow-control component in machine tool coolant delivery systems, providing fast response, positive shutoff, and long service life in demanding metalworking operations.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Process & Pneumatic Valve (Coolant Valve) |
| Model Designation | SGC421B-1025Y-5DZ |
| Manufacturer | SMC Corporation |
| Series | SGC Series Coolant Valve |
| Actuation Type | Pneumatic Pilot Actuated |
| Port Size | 1″ (25A) — indicated by “1025” designation |
| Operating Pressure | Standard Industrial Grade (Coolant / Fluid Circuit Rated) |
| Mounting & Connection | Standard ISO / SMC Interface |
| Media Compatibility | Water-soluble and oil-based coolants, cutting fluids |
Engineering Features & Advantages
- Precision Flow Control: Pneumatic pilot actuation delivers fast, repeatable open/close response for accurate coolant delivery timing in high-speed machining cycles.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, including exposure to coolant mist, chips, and vibration common in machine tool environments.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original SMC SGC series mounting and port standards, ensuring drop-in replacement without modification.
- Contamination Resistance: Internal sealing design minimizes clogging and wear from particulate-laden coolant, extending maintenance intervals.
- Compact Integration: Space-efficient body design allows installation in tight machine tool enclosures and manifold assemblies.
Typical Industrial Applications
This SMC coolant valve is widely deployed in CNC machining centers, lathes, and milling machines for controlled coolant delivery during cutting operations. It is also used in plastic injection molding machines for mold cooling circuit switching, in metallurgical processing equipment for fluid spray control, and in automated manufacturing lines where precise, pneumatically actuated coolant shutoff is required for process reliability and tool life optimization.
PRODUCT IMAGES


SMC SGC421B-1025Y-5DZ Coolant Valve
⚡ Emergency Plant Maintenance & Ready-to-Ship Notice:
- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
- Fast Dispatch: In-stock units ready for same-day dispatch via DHL / FedEx Express directly to your plant.
- Pre-Shipment Verification: High-definition photos, video testing runs, and serial number verification provided prior to shipment.
- Peace of Mind: Covered by our 12-Month Replacement Warranty.
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