SMC VEF Electro-Pneumatic Proportional Valve (Flow Type)

SMC VEF flow-type electro-pneumatic proportional valve, a 2- or 3-port spool valve that steplessly controls flow in proportion to the solenoid current (electric orifice valve).

Key features

2-port and 3-port types in body sizes 2, 3 and 4
Max. effective area from 2.5 to 45 mm² depending on standard characteristic
Rc1/4 to Rc3/4 ports; size 2 also without sub-plate
Proportional solenoid driven by VEA25 power amplifier, DIN terminal
Non-lube operation possible; G/NPT/NPTF threads on order

Specifications

Fluid	Air
Max. operating pressure	1.0 MPa
Response time	0.03 s (size 2, 3), 0.05 s (size 4)
Hysteresis / repeatability	3% F.S. / 3% F.S.
Sensitivity	0.5% F.S.
Applicable power amplifier	VEA25x
Max. current / coil resistance	1 A / 13 Ω (20°C)
Ambient and fluid temperature	0 to 50°C (no condensation)
Mass	0.9 kg (size 2), 1.0 kg (3), 1.4 kg (4)
Source	SMC Korea catalog (SMCKR_VEF_VEP.pdf), p. 890 (PDF p. 1)

VEF2121-1		Ports: 2-port \| Body size: 2 \| Max. effective area: 13 mm² \| Port size: Without sub-plate
VEF2121-1-02		Ports: 2-port \| Body size: 2 \| Max. effective area: 13 mm² \| Port size: Rc1/4
VEF2121-1-03		Ports: 2-port \| Body size: 2 \| Max. effective area: 13 mm² \| Port size: Rc3/8
VEF2122-1		Ports: 2-port \| Body size: 2 \| Max. effective area: 9 mm² \| Port size: Without sub-plate
VEF2122-1-02		Ports: 2-port \| Body size: 2 \| Max. effective area: 9 mm² \| Port size: Rc1/4
VEF2122-1-03		Ports: 2-port \| Body size: 2 \| Max. effective area: 9 mm² \| Port size: Rc3/8
VEF2123-1		Ports: 2-port \| Body size: 2 \| Max. effective area: 5 mm² \| Port size: Without sub-plate
VEF2123-1-02		Ports: 2-port \| Body size: 2 \| Max. effective area: 5 mm² \| Port size: Rc1/4
VEF2123-1-03		Ports: 2-port \| Body size: 2 \| Max. effective area: 5 mm² \| Port size: Rc3/8
VEF2131-1-02		Ports: 2-port \| Body size: 3 \| Max. effective area: 30 mm² \| Port size: Rc1/4
VEF2131-1-03		Ports: 2-port \| Body size: 3 \| Max. effective area: 30 mm² \| Port size: Rc3/8
VEF2131-1-04		Ports: 2-port \| Body size: 3 \| Max. effective area: 30 mm² \| Port size: Rc1/2
VEF2141-1-03		Ports: 2-port \| Body size: 4 \| Max. effective area: 45 mm² \| Port size: Rc3/8
VEF2141-1-04		Ports: 2-port \| Body size: 4 \| Max. effective area: 45 mm² \| Port size: Rc1/2
VEF2141-1-06		Ports: 2-port \| Body size: 4 \| Max. effective area: 45 mm² \| Port size: Rc3/4
VEF3121-1		Ports: 3-port \| Body size: 2 \| Max. effective area: 12 mm² \| Port size: Without sub-plate
VEF3121-1-02		Ports: 3-port \| Body size: 2 \| Max. effective area: 12 mm² \| Port size: Rc1/4
VEF3121-1-03		Ports: 3-port \| Body size: 2 \| Max. effective area: 12 mm² \| Port size: Rc3/8
VEF3122-1		Ports: 3-port \| Body size: 2 \| Max. effective area: 8 mm² \| Port size: Without sub-plate
VEF3122-1-02		Ports: 3-port \| Body size: 2 \| Max. effective area: 8 mm² \| Port size: Rc1/4
VEF3122-1-03		Ports: 3-port \| Body size: 2 \| Max. effective area: 8 mm² \| Port size: Rc3/8
VEF3123-1		Ports: 3-port \| Body size: 2 \| Max. effective area: 4.5 mm² \| Port size: Without sub-plate
VEF3123-1-02		Ports: 3-port \| Body size: 2 \| Max. effective area: 4.5 mm² \| Port size: Rc1/4
VEF3123-1-03		Ports: 3-port \| Body size: 2 \| Max. effective area: 4.5 mm² \| Port size: Rc3/8
VEF3124-1		Ports: 3-port \| Body size: 2 \| Max. effective area: 2.5 mm² \| Port size: Without sub-plate
VEF3124-1-02		Ports: 3-port \| Body size: 2 \| Max. effective area: 2.5 mm² \| Port size: Rc1/4
VEF3124-1-03		Ports: 3-port \| Body size: 2 \| Max. effective area: 2.5 mm² \| Port size: Rc3/8
VEF3141-1-03		Ports: 3-port \| Body size: 4 \| Max. effective area: 25 mm² \| Port size: Rc3/8
VEF3141-1-04		Ports: 3-port \| Body size: 4 \| Max. effective area: 25 mm² \| Port size: Rc1/2
VEF3141-1-06		Ports: 3-port \| Body size: 4 \| Max. effective area: 25 mm² \| Port size: Rc3/4

Proportional ValvesSMC

30 product codes available in this family

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SMC VEF Electro-Pneumatic Proportional Valve (Flow Type)

Brand SMC·Proportional Valves

Available part numbers (30)

VEF2121-1, VEF2121-1-02, VEF2121-1-03, VEF2122-1, VEF2122-1-02, VEF2122-1-03, VEF2123-1, VEF2123-1-02, VEF2123-1-03, VEF2131-1-02 + 20 more — see full table ↓

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Product codes & specifications

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	Product code	Spec
	VEF2121-1	Ports: 2-port \| Body size: 2 \| Max. effective area: 13 mm² \| Port size: Without sub-plate
	VEF2121-1-02	Ports: 2-port \| Body size: 2 \| Max. effective area: 13 mm² \| Port size: Rc1/4
	VEF2121-1-03	Ports: 2-port \| Body size: 2 \| Max. effective area: 13 mm² \| Port size: Rc3/8
	VEF2122-1	Ports: 2-port \| Body size: 2 \| Max. effective area: 9 mm² \| Port size: Without sub-plate
	VEF2122-1-02	Ports: 2-port \| Body size: 2 \| Max. effective area: 9 mm² \| Port size: Rc1/4
	VEF2122-1-03	Ports: 2-port \| Body size: 2 \| Max. effective area: 9 mm² \| Port size: Rc3/8
	VEF2123-1	Ports: 2-port \| Body size: 2 \| Max. effective area: 5 mm² \| Port size: Without sub-plate
	VEF2123-1-02	Ports: 2-port \| Body size: 2 \| Max. effective area: 5 mm² \| Port size: Rc1/4
	VEF2123-1-03	Ports: 2-port \| Body size: 2 \| Max. effective area: 5 mm² \| Port size: Rc3/8
	VEF2131-1-02	Ports: 2-port \| Body size: 3 \| Max. effective area: 30 mm² \| Port size: Rc1/4
	VEF2131-1-03	Ports: 2-port \| Body size: 3 \| Max. effective area: 30 mm² \| Port size: Rc3/8
	VEF2131-1-04	Ports: 2-port \| Body size: 3 \| Max. effective area: 30 mm² \| Port size: Rc1/2
	VEF2141-1-03	Ports: 2-port \| Body size: 4 \| Max. effective area: 45 mm² \| Port size: Rc3/8
	VEF2141-1-04	Ports: 2-port \| Body size: 4 \| Max. effective area: 45 mm² \| Port size: Rc1/2
	VEF2141-1-06	Ports: 2-port \| Body size: 4 \| Max. effective area: 45 mm² \| Port size: Rc3/4
	VEF3121-1	Ports: 3-port \| Body size: 2 \| Max. effective area: 12 mm² \| Port size: Without sub-plate
	VEF3121-1-02	Ports: 3-port \| Body size: 2 \| Max. effective area: 12 mm² \| Port size: Rc1/4
	VEF3121-1-03	Ports: 3-port \| Body size: 2 \| Max. effective area: 12 mm² \| Port size: Rc3/8
	VEF3122-1	Ports: 3-port \| Body size: 2 \| Max. effective area: 8 mm² \| Port size: Without sub-plate
	VEF3122-1-02	Ports: 3-port \| Body size: 2 \| Max. effective area: 8 mm² \| Port size: Rc1/4
	VEF3122-1-03	Ports: 3-port \| Body size: 2 \| Max. effective area: 8 mm² \| Port size: Rc3/8
	VEF3123-1	Ports: 3-port \| Body size: 2 \| Max. effective area: 4.5 mm² \| Port size: Without sub-plate
	VEF3123-1-02	Ports: 3-port \| Body size: 2 \| Max. effective area: 4.5 mm² \| Port size: Rc1/4
	VEF3123-1-03	Ports: 3-port \| Body size: 2 \| Max. effective area: 4.5 mm² \| Port size: Rc3/8
	VEF3124-1	Ports: 3-port \| Body size: 2 \| Max. effective area: 2.5 mm² \| Port size: Without sub-plate
	VEF3124-1-02	Ports: 3-port \| Body size: 2 \| Max. effective area: 2.5 mm² \| Port size: Rc1/4
	VEF3124-1-03	Ports: 3-port \| Body size: 2 \| Max. effective area: 2.5 mm² \| Port size: Rc3/8
	VEF3141-1-03	Ports: 3-port \| Body size: 4 \| Max. effective area: 25 mm² \| Port size: Rc3/8
	VEF3141-1-04	Ports: 3-port \| Body size: 4 \| Max. effective area: 25 mm² \| Port size: Rc1/2
	VEF3141-1-06	Ports: 3-port \| Body size: 4 \| Max. effective area: 25 mm² \| Port size: Rc3/4

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SMC VEF Electro-Pneumatic Proportional Valve (Flow Type)