4938

Name: Festo 4938 Stem actuated valve V/O-3-1/8
Brand: Festo

Stem actuated valve V/O-3-1/8

The Festo part number 4938 is a directly controlled mechanical industrial component featuring a 3/2 open/closed monostable valve function and a piston seat structural design. It delivers a normal nominal flow rate of 140 l/min through G1/8 pneumatic working ports across an operating pressure range of -0.95 bar to 8 bar. Weighing 90 g with NBR seals, this unit mounts via through-holes and requires compressed air as per ISO 8573-1:2010 [-:-:-] with oil lubrication. Submit the exact part number, quantity, and application requirements for a quote.

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Industrial and obsolete parts are priced per enquiry: the final price depends on available stock, condition, quantity, and your delivery destination, so a fixed list price would be misleading. Request a quote and we confirm current pricing, lead time, and sourcing options — including hard-to-find and discontinued Festo references — within one business day.

Manufacturer: Festo
Part number: 4938
Data verification: Manufacturer evidence reviewed

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Verified configuration

Technical Specifications

Valve function: 3/2, open/closed, monostable
Actuation type: Mechanical
Normal nominal ow rate (normalized to DIN 1343): 140 l/min
Pneumatic working port: G1/8
Operating pressure: -0.95 bar...8 bar
Structural design: Piston seat
Nominal width: 3.5 mm
Type of control: directly
Operating medium: Compressed air as per ISO 8573-1:2010 [-:-:-]
Information on operating and pilot media: Operation with oil lubrication possible (required for further use)
LABS (PWIS) conformity: VDMA24364-B1/B2-L
Ambient temperature: -10 °C...60 °C
Actuating force: 28 N
Actuation force in initial position closed: 37.53 N
Product weight: 90 g
Type of mounting: With through-hole
Pneumatic connection 1: G1/8
Pneumatic connection 2: G1/8
Pneumatic connection 3: G1/8
Seals material: NBR
Housing material: Anodized aluminum

Engineering context

Identification and RFQ Guidance

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Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.

What to include in your RFQ

Provide quantity, delivery country and ZIP/postal code, required condition, target date, and photographs of the existing nameplate when available.

Technical verification

Our sourcing response is prepared against Festo 4938. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.