SMC CCVS23-4G-U1 — CC Series Small-Flow Air-Hydro Valve Unit, Stop + Skip Valve
2026-06-08The SMC CCVS23-4G-U1 is a small-flow valve unit from the CC Series Air-Hydro system, designed for use with the CC100 converter. It integrates both stop valve and skip valve functions, operates on 220 VAC with a grommet-style electrical entry, and converts pneumatic pressure into hydraulic output for smooth, stick-slip-free cylinder operation. This valve unit is the ideal solution for constant-speed feed control in precision grinding, welding, drilling, and automated assembly applications.
Product Specifications
| Parameter | Value |
|---|---|
| Manufacturer | SMC |
| Series | CC Series Air-Hydro System |
| Model | CCVS23-4G-U1 |
| Valve Unit Type | Small Flow (CCVS) |
| Compatible Converter | CC100 |
| Combined Valve Function | Stop Valve + Skip Valve |
| Rated Voltage | 220 VAC |
| Electrical Entry | Grommet (lead wire) |
| Operating Pressure | 0 ~ 0.7 MPa |
| External Pilot Pressure (Stop + Skip) | 0.3 ~ 0.7 MPa |
| Proof Pressure | 1.05 MPa |
| Fluid | Turbine oil (40 ~ 100 cSt) |
| Ambient / Fluid Temperature | 5 ~ 50°C |
| Response Time | 0.07 ± 0.015 s |
| Intermediate Stop Accuracy | ±0.75 mm (@ 50 mm/s) |
| Solenoid Valve Power | 4 W (DC models) |
| Valve Function | Normally Closed (N.C.) |
| Effective Area (Stop+Skip Free Flow) | 40 mm² |
| Effective Area (Throttle Free Open) | 35 mm² |
| Effective Area (Throttle Free Flow) | 30 mm² |
| Minimum Control Flow | 0.3 dm³/min |
| Flow Control Pressure Compensation | ±10% (within 60% load ratio) |
Model Number Breakdown
- CCVS: Small-flow valve unit series (CCVL = high flow)
- 2: Valve unit size — for CC100 converter
- 3: Combined valve — Stop Valve + Skip Valve
- 4: Rated voltage 220 VAC
- G: Electrical entry Grommet (lead wire type)
- U1: Special option code
Key Features and Benefits
Air-Hydro Conversion: Eliminating Cylinder Stick-Slip
Standard pneumatic cylinders often suffer from the stick-slip phenomenon at low speeds — jerky, inconsistent motion caused by friction variation and air compressibility. The CC Series solves this by converting pneumatic pressure into hydraulic output. The incompressibility of hydraulic oil ensures constant-speed, smooth linear motion, providing a cost-effective alternative to full hydraulic systems without the need for a hydraulic power unit.
Integrated Stop + Skip Dual Valve Functions
The CCVS23-4G-U1 integrates both stop valve and skip valve control functions. The stop valve enables intermediate stopping at any position with ±0.75 mm accuracy. The skip valve allows rapid traversal of specific stroke segments (e.g. bypassing obstacles or skipping non-process zones) without requiring external valves or additional plumbing, simplifying overall system design.
Pressure-Compensated Flow Control
When load variation remains within 60% of theoretical output, the pressure compensation feature maintains flow fluctuation within ±10%. This ensures consistent feed speed under varying workpiece weights or cutting forces — a critical requirement for precision machining applications.
Fast 0.07-Second Response
A response time of just 0.07 seconds supports high-frequency start/stop and precise intermediate positioning applications. When paired with the CC100 converter, the system delivers high-accuracy hydraulic constant-speed control over extended stroke lengths.
Operating Principle
The CC Series Air-Hydro system comprises three core components: the solenoid valve unit (CCVS/CCVL), the air-hydro converter (CC63/CC100/CC160), and the hydraulic actuator cylinder (CH Series). Compressed air drives the pneumatic piston inside the converter, which displaces hydraulic oil into the actuator cylinder, delivering hydraulic-grade smooth motion control. The valve unit governs pneumatic circuit switching, flow regulation, and motion mode selection (stop/skip).
Applications
- Precision Grinding Feed: grinding wheel infeed requiring constant speed without stick-slip
- Welding Wire Feed and Travel: constant-speed welding head traverse with stable speed under load variation
- Drilling and Reaming: constant-speed feed for drill power heads, preventing tool breakage
- Cutting and Sawing: constant-speed blade feed, preventing cutting seizure
- Precision Dispensing: constant-speed dispensing valve movement for uniform bead application
- Inspection Equipment: constant-speed probe scanning for measurement data consistency
CC Series Selection Guide
| Parameter | CCVS (Small Flow) | CCVL (High Flow) |
|---|---|---|
| Free Flow Effective Area | 40 mm² | 88 mm² |
| Throttle Free Flow Area | 35 mm² | 77 mm² |
| Min. Control Flow | 0.3 dm³/min | — |
| Compatible Converters | CC63 / CC100 / CC160 | CC100 / CC160 |
Related Models
| Model | Description |
|---|---|
| CCVS23-5G | 24 VDC version, same configuration |
| CCVS22-4G | Stop valve + throttle valve configuration |
| CCVS33-4G | For CC160 converter, stop + skip valve |
| CCVL23-4G | High-flow type, same configuration |
| CCVS23-PS1 | Alternative option code configuration |
FAQ
Q: What speed range does the CCVS23-4G-U1 support for constant-speed control?
When paired with the CC100 converter and a CH hydraulic cylinder, this valve unit supports constant-speed control from very low speeds (approximately 0.3 mm/s) up to medium speeds. Low-speed control is the core strength of the Air-Hydro system — standard pneumatic cylinders typically experience stick-slip below 50 mm/s, whereas the CC system maintains stable operation in this range. Intermediate stop accuracy is ±0.75 mm at 50 mm/s, with even better precision at lower speeds.
Q: Is an external hydraulic power pack required?
No. The CC Series Air-Hydro system is a fully self-contained pneumatic-to-hydraulic conversion solution requiring only a compressed air supply. The converter is pre-filled with hydraulic oil (turbine oil ISO VG 32-68) and requires no external hydraulic power unit, oil tank, or cooling system — dramatically reducing system complexity and cost compared to full hydraulic alternatives.
Q: What is the power consumption of the 220 VAC coil? Are other voltages available?
Standard DC coil power consumption is approximately 4 W. The 220 VAC coil is designed for common industrial voltage environments typical in factory machine tool control cabinets. For low-voltage DC control (e.g. direct PLC output), the CCVS23-5G (24 VDC) variant is available.
In stock and available for bulk orders. Contact us for a quotation, selection assistance, or technical consultation.