SMC VT307-5G1-01 3-Port Direct Operated Solenoid Valve

A versatile 3-port valve that can be piped several ways

VT307-5G1-01 is a direct-operated, 2-position single-solenoid 3-port valve from the SMC VT307 series in body-ported form. The catalogue calls it a single valve with various functions: with the universal porting scheme it can act as a normally closed or normally open valve, a divider valve, a selector valve, a blow-off valve or a vacuum-release valve, depending on how P, A and R are connected.

The type code is VT307 (T is body ported, O is manifold type), no valve-option letter (standard type), 5 (24 VDC), G (grommet, 300 mm lead wire), 1 (as listed in the catalogue example), and 01 (Rc 1/8 port; 02 gives Rc 1/4). Optional letters add a pressure specification (K for the high-pressure 1 MPa type), valve options E, Y, V and W, a CE-compliant Q and a bracket F.

Technical specifications

Option letters and what they change

The E option is a continuous duty valve for long energised periods, with 1.8 W power draw and a response time of 30 ms or less; the catalogue cautions that it is not for high cycle rates, asks users to consult SMC if it will be energised more than once a day, and states that the solenoid should be energised at least once in 30 days. The Y energy-saving version cuts coil power to 1.8 W (2 W with indicator) with a response time of 25 ms or less, while the V version is a vacuum specification valve with less leakage, operating from -101.2 kPa to 0.1 MPa, and the W version combines both. None of these options is part of the standard VT307-5G1-01 code.

The catalogue also lists a low-concentration ozone-resistant rubber seal (HNBR for the main valve), and notes that mounting dimensions are interchangeable with the previous product.

Applications and piping

The catalogue application drawings show a blow-off valve, a pressure release valve, a selector valve, a vacuum valve for a pad and a divider valve from a tank, as well as single- and double-acting cylinder drive. A 3-port valve with a vacuum pad is the classic use: P is connected to a vacuum source, A to the pad, and R vents to atmosphere to release the part. The V version has less air leakage than the standard type under low pressure and is the one recommended for vacuum applications, although the catalogue cautions that even it has slight leakage and cannot be used to hold vacuum in a pressure container.

Make sure dust or foreign matter does not enter the valve through an unused port such as the exhaust port, as the catalogue caution states.

Documents and quotation

The SMC VT307 catalogue linked at the end of this page contains the how-to-order page, specifications, flow data and dimensions. Confirm the valve option, pressure specification, voltage and port size before ordering. See also Solenoid Valves. Seven Star LLC is an independent supplier and quotes the exact code on request.

How the VT307-5G1-01 Works

The VT307 is a direct-operated poppet valve, so the coil moves the valve element itself and no pilot pressure is needed. The catalogue describes the operating principle as follows. When the coil is de-energised, the return spring pushes the poppet valve upward and closes port 1 (P), while port 2 (A) is connected to port 3 (R). When the molded coil is energised, the armature is attracted to the core and, through the push rod, pushes the poppet down; port 3 is then closed and port 1 is connected to port 2. Because switching does not rely on supply pressure, the VT307-5G1-01 operates from 0 MPa, which is what makes it useful on vacuum and low-pressure lines.

According to the catalogue component list, the body is die-cast aluminium, the poppet valve is aluminium with HNBR, the return spring is stainless steel and the coil is moulded in resin. A non-locking push-type manual override allows the valve to be operated by hand during set-up, and the mounting orientation is unrestricted.

Selection & Ordering Guide for the VT307-5G1-01

The how-to-order page in the SMC VT307 catalogue uses the example VT307-5G1-01-F. Reading the VT307-5G1-01 code from left to right:

• VT307 – body-ported 3-port valve. VO307 is the version for manifold mounting (no ports), used on the VV307 manifold base.
• Valve option – none shown, so this is the standard type. E, Y, V and W are the continuous duty, energy-saving, vacuum and energy-saving vacuum versions.
• Pressure specification – none shown, so the standard 0.7 MPa type. K is the semi-standard high-pressure (1 MPa) type.
• 5 – 24 VDC. Other codes: 6 = 12 VDC, 1 = 100 VAC, 2 = 200 VAC, 3 = 110 VAC, 4 = 220 VAC, 7 = 240 VAC.
• G1 – grommet electrical entry with 300 mm lead wire (H is 600 mm; D and DO are DIN terminal with or without connector). The catalogue dimension drawing is headed “Grommet: VT307-G1”.
• 01 – 1/8 port (02 is 1/4). With no thread letter the thread is Rc; F, N and T select G, NPT and NPTF.
• Further options – S adds a surge voltage suppressor (grommet type only), Z a light and surge voltage suppressor (DIN type only), F a bracket (DXT152-25-1A) and Q the CE-compliant version.

If you are matching an existing valve, read the full code on the nameplate including any suffix. Our team can help confirm the correct ordering code.

Installation & Maintenance

• Flush the piping before connection and keep dust out of unused ports, especially the exhaust port.
• Install a filter upstream. Lubrication is not required; if lubricated, use turbine oil Class 1 ISO VG32.
• Keep the supply voltage within –15% to +10% of the rated 24 VDC, and observe the catalogue ambient and fluid temperature range of –10 to 50 °C with no freezing.
• Do not exceed the maximum operating frequency of 10 Hz. For coils that stay energised for long periods, the catalogue recommends the continuous duty E type rather than the standard valve.
• For vacuum duty, select the V or W type; the catalogue notes that these valves have slight leakage and cannot be used for vacuum holding in a pressure container.
• On VV307 manifolds the valve can be converted between N.C. and N.O. by turning over the function plate.

Typical Applications in Oman & the GCC

The VT307-5G1-01 is used for pilot signals to larger valves, small single-acting cylinders, blow-off nozzles, pressure release and vacuum-pad circuits. In Oman and the GCC these functions appear in packaging and bottling lines, water and desalination plant auxiliaries, printing, plastics and assembly machines, and in instrument air panels where a small 3-port valve controls a process valve actuator. Its universal porting lets one stocked valve type cover several functions in a maintenance store.

Why Source from Seven Star LLC

Seven Star LLC supplies SMC 3-port solenoid valves, including the VT307 series, across Oman and the GCC. Send the full code, for example VT307-5G1-01, with quantity and any options and request a quote. Our team can help confirm the correct ordering code when you are replacing an older valve or changing voltage, port size or electrical entry.