Specifications: S3R08 is an AirTAC S3 control valve with 3 ports, 2 positions, a roller lever actuator and PT 1/4 inch connections.
Product Catalog
Download Airtac Product Catalog (PDF)
For detailed product dimensions and mounting drawings, please download and refer to the PDF catalog.
Functional Alternative Statement
Airtac S3 series valves are functional alternatives to SMC VM200 series valves.
Model Code Explained
Parameter
Details
Exact ordering code
S3R08
Series S3
3 ports, 2 positions; external direct mechanical control
Control-head code R
Roller lever
Port-size code 08
PT 1/4 inch
Thread option
Blank = PT
Color suffix
Not used for this control-head type
Technical Specifications
Parameter
Details
Fluid
Air, filtered through a 40 μm filter element
Operating method
External direct acting
Valve function
3 ports, 2 positions
Selected control form
roller lever
Working connection
PT 1/4 inch
Effective flow area
12.0 mm²
Cv
0.67
Operating-pressure range
0–1.0 MPa (0–145 psi)
Proof pressure
1.5 MPa (215 psi)
Working temperature
−20 to 70 °C
Body material
Aluminum alloy
Lubrication
Not required
Features and Pneumatic Operation
The shut-off/poppet construction provides internal sealing and sensitive directional switching without a lubrication requirement. The valve supports body mounting and the illustrated panel arrangements for the applicable control head.
The operating force is supplied by an external machine mechanism. The catalog describes this arrangement for position detection or stroke/limit switching.
The catalog identifies this control-head family as using a metal mechanism for durability and stable operation. That statement does not assign an unspecified material to every internal component.
Lubrication is not required. If lubricated air is introduced, continue using the same lubrication medium without interruption; the catalog recommends ISO VG32 oil or an equivalent grade.
Port letters identify P as the supply, A as the controlled outlet and R as exhaust. The graphical symbol in the PDF defines the exact flow paths for the selected actuator and valve position.
Selected Operating Travel
Parameter
Details
Valve-spool stroke
2.4–3.4 mm
Button / roller / handle stroke
5.5–7.8 mm
The listed stroke ranges are installation limits for the selected control form. Travel is not an added body dimension. Use the drawing orientation and do not drive the mechanism past its stated range.
Installation, Travel Limits and Operation
Mount the valve through the body fixing points or use the illustrated panel arrangement where the selected head permits it. Keep the body and head aligned and retain access to the pneumatic ports. The catalog does not state a general screw-tightening torque.
Do not exceed the selected spool and actuator stroke ranges. Excess travel imposed by the external mechanism can cause leakage or damage. Engineering-plastic button components must be operated by hand and must not be struck with metal tools; the dedicated mechanical roller/plunger models are actuated by their intended external mechanism.
The spring-return symbol and the installation notes identify an automatically returning actuation arrangement. Allow the actuator to return freely after releasing the operating force.
Body and Mounting Dimensions
The S3B body drawing supplies the base dimensions for the selected port size. A selected control head is shown separately; its dimensions are not a complete assembled-valve envelope.
Drawing reference
Value
Drawing dimension A
34 mm
Drawing dimension B
17.5 mm
Drawing dimension C
52 mm
Drawing dimension D
46 mm
Drawing dimension KA
24 mm
Drawing dimension KB
22.5 mm
Drawing dimension PA
21 mm
Drawing dimension PB
12 mm
Drawing K
M5 × 0.8; the illustration marks two K mounting positions
Drawing P — two connection callouts
PT 1/4 inch
Selected Control Head and Replacement Reference
The values below describe the selected actuator or control-head assembly. They are separate from the body drawing and must not be added indiscriminately to the body dimensions.
Control-head drawing reference
Value
Roller diameter
15 mm
Head length reference
40 mm
Longitudinal sub-span
32.5 mm
Mounting longitudinal span
30.5 mm
Head vertical reference
26 mm
Vertical sub-span
18.5 mm
Lower vertical reference
7 mm
Head width reference
16 mm
Inner width
8.5 mm
Local width reference
13 mm
The S3 catalog explicitly lists control-head assembly M3R210-P14A for this head family. The M3/S3 prefix on a shared replacement head is retained exactly; it does not change this valve’s S3 ordering code. This valve includes its selected actuator; a second head is not required for normal operation.
Dimension Drawing Reminder
All linear drawing values above are in millimeters unless a thread or angle unit is stated. The original drawings retain the dimension-arrow relationships, actuator orientations and port views that cannot be fully represented by a two-column table.
For detailed product dimensions and mounting drawings, please download and refer to the PDF catalog.
Internal Components — Catalog Reference
The sectioned illustration is labeled S3PM. Its numbered components are listed below as a series construction reference. This is not a spare-parts kit or an assertion that every actuator variation has an identical exploded assembly. Materials are stated only where the catalog expressly supplies them.
Drawing item
Component
1
Body
2
Bottom cover
3
Stopper plug
4
Valve core
5
Cross-head screw
6
Button pressing buckle
7
Spring
8
Clamping washer
9
Dust cover
10
Button cap
11
Main button body
12
Top cover
13
Button retaining ring
14
Clamping nut
15
Button holder
16
Button fixing connector
17
O-ring
18
Spring
19
Spring
20
O-ring
Flow Characteristics
The catalog flow chart for S3B-08 plots operating pressure in MPa on the vertical axis from 0 to 0.8, and flow in L/min on the horizontal axis from 0 to 1200. The family of curves illustrates the pressure/flow relationship. Axis limits are graph bounds, not guaranteed rated flow values for this complete valve; use the supplied curve and the required pressure conditions.
Supply Scope and Related Heads
This ordering code identifies one valve with its selected control-head form. It does not encode a multiple-valve assembly, a spare head, a silencer, mounting-panel hardware or pneumatic tubing. Where the catalog lists a separately orderable head, its exact code is given above as a replacement reference; the source does not provide a screw/gasket quantity breakdown for a service kit.
Series Ordering Options
The S3 family offers B, C, D, Y, R, L and V heads; red-only PL; and PP, PF, PM and HS in red, green or black. Port options are M5, 06 (1/8 inch) and 08 (1/4 inch). The original linked ordering chart uses M5 for the metric complete-valve code, while some replacement-head and Chinese drawing labels use 05; those labels do not authorize changing this listing code.
For 1/8 and 1/4 inch connections, a blank thread suffix means PT, G means G thread and T means NPT. M5 connections have no such thread suffix. These are series alternatives; the selected configuration is the one decoded above.
Reference Weight
Catalog reference weight: 80 g, from the S3R row of the 2022 comprehensive catalog weight table (paper page 300). The catalog weight table identifies the control-head family without a port, color or thread suffix. This is that published family reference, not an independently measured weight for every option. The table states that weights are for reference only; actual weight is determined by the delivered product. This is not a measured or packaged shipping weight.
Catalog Basis
Technical information is taken from the linked S3 catalog and cross-checked against the 2022 comprehensive catalog, paper pages 140–142 (PDF pages 141–143). The paper-page-300 weight table is cited separately above. No unrelated series dimensions or weights are substituted.
Optional Piping Accessories
P = this S3 valve’s female supply connection (PT1/4); W = its female controlled working connection A (PT1/4). The body drawing’s 2-P callout gives the two connection sizes; K identifies mounting threads, not pneumatic ports. Keep supply and working circuits separate. Multiple keys retain each use. Tube OD is mm (in = inches); compression/tubing show OD × ID. These piping accessories are optional and ordered separately.
Code-prefix uses (match the longest listed family prefix): ASC inline threaded flow control; BB male–male; BD male–female; BKC compression fitting; BPC metal straight; BPOC metal straight; GAFR upstream filter-regulator; GPSA/PSA inline flow control; PC straight; PEB branch tee; PED run tee; PH banjo elbow; PHF female branch banjo; PHW twin banjo; PKD reducing distribution fitting; PL elbow; PLL extended elbow; POC round straight; PSL elbow flow control; PSS flow control; PTL push-lock flow control; PYB Y; PZB cross; UE PU tube; US PU tube.
Use
Size / complete codes
P
ASC20008,GAFR20008S,GAFR30008S
P,W
male PT1/4 ↔ male PT1/8: BB0102,BB0102-Smale PT1/4 ↔ male PT1/4: BB0202,BB0202-Smale PT3/8 ↔ male PT1/4: BB0203,BB0203-Smale PT1/2 ↔ male PT1/4: BB0204,BB0204-Smale PT1/4 ↔ female PT1/8: BD0102,BD0102-S6 × 4: BKC0604-02,BKC0604-02-S,UE95A060040100MBU,US98A060040100MBU8 × 5: BKC0805-02,BKC0805-02-S,UE95A080050100MBU,US98A080050100MBU8 × 5.5 or 6: BKC0806-02,BKC0806-02-S10 × 6.5: BKC1065-02,BKC1065-02-S,UE95A100065100MBU,US98A100065100MBU10 × 7.5 or 8: BKC1075-02,BKC1075-02-S12 × 8: BKC1208-02,BKC1208-02-S,UE95A120080100MBU,US98A120080100MBU12 × 9 or 10: BKC1209-02,BKC1209-02-S10: BPC1002,BPOC1002,GPSA10,GPSA10D,PC1002,PC1002-S,PC1002D,PC1002D-S,PEB1002,PEB1002-S,PEB1002D,PEB1002D-S,PED1002,PED1002-S,PED1002D,PED1002D-S,PH1002,PH1002-S,PH1002D,PH1002D-S,PHW1002,PHW1002-S,PHW1002D,PHW1002D-S,PL1002,PL1002-S,PL1002D,PL1002D-S,PLL1002,PLL1002-S,PLL1002D,PLL1002D-S,POC1002,POC1002-S,POC1002D,POC1002D-S,PSA10,PSA10-S,PSA10D,PSA10D-S,PSL1002A,PSL1002A-S,PSL1002AD,PSL1002AD-S,PSL1002B,PSL1002B-S,PSL1002BD,PSL1002BD-S,PSS1002A,PSS1002A-S,PSS1002AD,PSS1002AD-S,PSS1002B,PSS1002B-S,PSS1002BD,PSS1002BD-S,PTL1002A,PTL1002AD,PTL1002B,PTL1002BD,PYB1002,PYB1002-S,PYB1002D,PYB1002D-S,PZB1002,PZB1002-S,PZB1002D,PZB1002D-S12: BPC1202,GPSA12,GPSA12D,PC1202,PC1202-S,PC1202D,PC1202D-S,PEB1202,PEB1202-S,PEB1202D,PEB1202D-S,PED1202,PED1202-S,PED1202D,PED1202D-S,PL1202,PL1202-S,PL1202D,PL1202D-S,PLL1202,PLL1202-S,PLL1202D,PLL1202D-S,POC1202,POC1202-S,POC1202D,POC1202D-S,PSA12,PSA12-S,PSA12D,PSA12D-S,PYB1202,PYB1202-S,PYB1202D,PYB1202D-S4: BPC402,GPSA4,GPSA4D,PC402,PC402-S,PC402D,PC402D-S,PEB402,PEB402-S,PEB402D,PEB402D-S,PED402,PED402-S,PED402D,PED402D-S,PL402,PL402-S,PL402D,PL402D-S,PLL402,PLL402-S,PLL402D,PLL402D-S,POC402,POC402-S,POC402D,POC402D-S,PSA4,PSA4-S,PSA4D,PSA4D-S,PYB402,PYB402-S,PYB402D,PYB402D-S6: BPC602,BPOC602,GPSA6,GPSA6D,PC602,PC602-S,PC602D,PC602D-S,PEB602,PEB602-S,PEB602D,PEB602D-S,PED602,PED602-S,PED602D,PED602D-S,PH602,PH602-S,PH602D,PH602D-S,PHW602,PHW602-S,PHW602D,PHW602D-S,PL602,PL602-S,PL602D,PL602D-S,PLL602,PLL602-S,PLL602D,PLL602D-S,POC602,POC602-S,POC602D,POC602D-S,PSA6,PSA6-S,PSA6D,PSA6D-S,PSL602A,PSL602A-S,PSL602AD,PSL602AD-S,PSL602B,PSL602B-S,PSL602BD,PSL602BD-S,PSS602A,PSS602A-S,PSS602AD,PSS602AD-S,PSS602B,PSS602B-S,PSS602BD,PSS602BD-S,PTL602A,PTL602AD,PTL602B,PTL602BD,PYB602,PYB602-S,PYB602D,PYB602D-S,PZB602,PZB602-S,PZB602D,PZB602D-S8: BPC802,BPOC802,GPSA8,GPSA8D,PC802,PC802-S,PC802D,PC802D-S,PEB802,PEB802-S,PEB802D,PEB802D-S,PED802,PED802-S,PED802D,PED802D-S,PH802,PH802-S,PH802D,PH802D-S,PHW802,PHW802-S,PHW802D,PHW802D-S,PL802,PL802-S,PL802D,PL802D-S,PLL802,PLL802-S,PLL802D,PLL802D-S,POC802,POC802-S,POC802D,POC802D-S,PSA8,PSA8-S,PSA8D,PSA8D-S,PSL802A,PSL802A-S,PSL802AD,PSL802AD-S,PSL802B,PSL802B-S,PSL802BD,PSL802BD-S,PSS802A,PSS802A-S,PSS802AD,PSS802AD-S,PSS802B,PSS802B-S,PSS802BD,PSS802BD-S,PTL802A,PTL802AD,PTL802B,PTL802BD,PYB802,PYB802-S,PYB802D,PYB802D-S,PZB802,PZB802-S,PZB802D,PZB802D-S10; male RA PT1/4 / female RB PT1/4: PHF1002,PHF1002-S,PHF1002D,PHF1002D-S6; male RA PT1/4 / female RB PT1/4: PHF602,PHF602-S,PHF602D,PHF602D-S8; male RA PT1/4 / female RB PT1/4: PHF802,PHF802-S,PHF802D,PHF802D-Smain 8 / branch 6: PKD8-602,PKD8-602-S,PKD8-602D,PKD8-602D-S4 × 2.5: UE95A040025100MBU,US98A040025100MBU
Match PT/G/NPT exactly. Use the specified thread seal or face gasket. Match tube OD and compression OD/ID; metric and inch sizes are not interchangeable. Use suitable soft nylon/PU tube and check seating, clearance, bends and flow. Tighten compression bodies by the hex, not tube nuts. Where listed: D is black, blank grey, -M miniature; -S denotes only the specified 304 stainless parts.
PSA/GPSA are tube-side flow controls and need separate matching tube connections; they do not screw directly into P or W. PHF use male RA at the valve; female RB requires its own matching male thread and seal and is not a tube socket. Match both adapter ends to their separate mating parts. Branches join one circuit. Keep supply P and working A separate; do not bridge these paths.
Standard push-in fittings and flow-control parts: ≤1 MPa, −20–70°C. Metal BPC/BPOC: ≤0.9 MPa; compression fittings/thread adapters: ≤1 MPa. The listed metal push-in, compression and adapter groups have a 0–150°C range, limiting the connected valve path to 0–70°C or narrower. Apply every stricter component limit; no system vacuum rating is established.
This mechanically or manually operated S3 valve operates at 0–1 MPa and −20–70°C with 40 µm filtered air. Accessory limits may narrow that range; proof pressure is not working pressure. The piping choices are optional and ordered separately, and do not establish separately orderable panel-mounting or internal-part kits.
Flow-control suffix A restricts thread→tube, with free reverse flow; suffix B reverses it. Supply normally flows tube→thread. At valve working port A, suffix A restricts flow to the actuator and suffix B the return; cylinder-mounted orientation differs. Follow the flow symbols, including PSA/GPSA. Closed controls are not leak-tight isolation. Adjust gently without forcing stops; depressurize before tube removal. Never cap an active supply or working connection.
ASC is a separately connected upstream supply flow control, assigned to P only. Both female ports require matching male connections; follow its P/A markings. Its limits are 0.05–0.95 MPa and −20–70°C with ≤40 µm filtration. The complete valve path must meet these and every stricter component limit; the valve’s 0–1 MPa range does not extend the ASC rating.
GAFR is a separately connected upstream supply filter/regulator, assigned to P only. Both female ports require matching male piping; follow IN→OUT and check total flow and bowl/environment suitability. Inlet ≤1 MPa; regulation 0.15–0.9 MPa; −5–70°C, nonfreezing. Apply every stricter valve/component limit. Listed GAFR S versions have a 40 µm filter, PC bowl, differential/manual drain, bracket and round snap-in gauge (MPa/psi), without a reverse-flow valve. Air lubrication is not required. If lubricated air is introduced, continue with consistent lubrication using ISO VG32 or equivalent oil.
US98A/UE95A examples are separately ordered blue 100 m metric PU coils rated 1 MPa at 23°C. US98A: −20–70°C; UE95A: −40–70°C. Match OD/ID and derate as temperature rises within valve/component limits; 1 MPa is not assured throughout. Use inch tube where the selected connection requires it; metric tube is not a substitute.
PTL recommended cap-adjustment torque: 1/4: 0.16 N·m. These are not thread-installation torques.
Items marked discontinued are historical service references, not current standard recommendations. Confirm availability or a manufacturer-approved replacement. An unmarked catalogue entry does not promise current production, stock or delivery. All listed options are ordered separately.
Read
more
less
