Bill of Materials
All pneumatic ports standardized to G1/4 unless noted. Tubing is 6 mm OD / 4 mm ID throughout. FS 2026 rules: push-in fittings are allowed for ASB/EBS, but we prefer compression (union nut) fittings. Exception: the SDE5 sensor has an integrated QS-6 push-in port.
This BOM covers the full design (ASB + OR valve). The simplified design uses the same parts minus the ASB valve, OR valve, ASB coil, and one silencer/connector.
The BOM follows the pneumatic path from compressor/tank to actuator.
Compressor & Tank
12V portable compressor with integrated 6 L tank. Fills the system and maintains pressure.
| Status | Part No. | Description | Link |
|---|---|---|---|
| Buy | — | VEVOR air compressor, 12V, 90-120 psi (6.2-8.3 bar), 6 L tank | VEVOR |
Tubing
| Status | Part No. | Description | Festo link |
|---|---|---|---|
| Buy | 197384 | PUN-H-6X1-BL tubing, 6 mm OD / 4 mm ID, blue (3 m) | Festo |
Datasheet (local): 197384datasheet.pdf
Pressure Sensor 1 (tank side, before regulator)
Monitors tank/supply pressure. Connects directly to tubing via integrated 6 mm push-in fitting. Max measurement range: 10 bar — no overpressure rating documented.
| Status | Part No. | Description | Festo link |
|---|---|---|---|
| Reuse | 567465 | SDE5-D10-NF-Q6E-V-M8 pressure sensor, 0-10 bar, 0-10V analog, M8 connector, QS-6 push-in | Festo |
Datasheet (local): 567465datasheet.pdf
Warning: This sensor is rated 0-10 bar. The tank side may see up to 8.3 bar (compressor max). If placed before the regulator, ensure supply pressure stays within 10 bar or the sensor may be damaged.
Manual Valve (brake release / isolation)
Manual valve for brake release during maintenance and system isolation. Reuse existing on-hand valve.
| Status | Part No. | Description | Notes |
|---|---|---|---|
| Reuse | — | Manual valve, G1/4 | On-hand from previous seasons |
Low-Pressure Regulator
Adjustable regulator to set maximum system working pressure downstream of the tank. Updated to D7 variant for higher output range (0.5-12 bar vs D6's 0.5-10 bar).
| Status | Part No. | Description | Festo link |
|---|---|---|---|
| Buy | 527690 | MS4-LR-1/4-D7-AD10 pressure regulator, G1/4, 0.5-12 bar | Festo |
Datasheet (local): 527690datasheet.pdf
Note: The D7-AD10 subtype is selected within the same Festo product page as the D6 variant. The D6 maxes out at 7 bar (confirmed on unit label: p2 max 7 bar / 105 psi), which is too low for our system. The D7 extends output to 0.5-12 bar — there is no intermediate variant capping at 10 bar.
Warning — max system pressure is 10 bar. The D7 regulator can output up to 12 bar, but all downstream components are rated at 10 bar or below (VUVS valves: 10 bar, SDE5 sensors: 10 bar, ADN-S actuator: 10 bar, VPPM inlet: 11 bar). Never set the regulator above 10 bar or downstream components may be damaged. There is no MS4-LR variant that caps at exactly 10 bar (D6 = 7 bar, D7 = 12 bar), so operational discipline or a downstream relief valve is required.
Pressure Sensor 2 (regulated side, before valves)
Monitors regulated pressure entering the valve stage. Same model as sensor 1.
| Status | Part No. | Description | Festo link |
|---|---|---|---|
| Buy | 567465 | SDE5-D10-NF-Q6E-V-M8 (second unit) | Festo |
Datasheet (local): 567465datasheet.pdf
EBS Electrovalve (emergency braking)
Normally-open solenoid valve. When powered (driving): closed. When unpowered (emergency): opens and delivers full supply pressure to the actuator. In both simplified and full designs. Max operating pressure: 10 bar (2.5-10 bar range).
| Status | Part No. | Description | Festo link |
|---|---|---|---|
| Reuse | 8035174 | VUVS-LT25-M32U-MD-G14-F8, 3/2-way, Normally Open, G1/4, 2.5-10 bar | Festo |
| 575488 | Datasheet (local) | (matches VUVS-L25-M32U-MD-G14-F8) |
ASB Electrovalve (VPPM supply isolation)
Normally-closed solenoid valve in series before the VPPM. When powered (driving): open, allowing regulated pressure to reach the VPPM. When unpowered (emergency): closes, cutting supply to the VPPM to prevent any potential seal-degradation leakage. Full design only — not needed in simplified design. Max operating pressure: 10 bar (2.5-10 bar range).
| Status | Part No. | Description | Festo link |
|---|---|---|---|
| Buy | 8035167 | VUVS-LT25-M32C-MD-G14-F8, 3/2-way, Normally Closed, G1/4, 2.5-10 bar | Festo |
VPPM Proportional Valve (ASB)
Proportionally controls brake pressure during autonomous driving. All ports blocked when unpowered (see VPPM analysis). Max inlet pressure: 11 bar (port 1). Output regulation range: 0-10 bar.
| Status | Part No. | Description | Festo link |
|---|---|---|---|
| Buy | 571293 | VPPM-8L-L-1-G14-0L10H-V1P-S1C1, 0-10 bar output, max 11 bar inlet, 0-10V setpoint, G1/4 | Festo |
| VPPM catalog documentation (local) | online | ||
| Part-specific datasheet (local) | online |
Shuttle Valve (OR valve)
Ball-type shuttle valve that merges the EBS and VPPM output lines. Whichever side has higher pressure pushes the ball to seal the other port, preventing backflow. Full design only — not needed in simplified design.
| Status | Part No. | Description | Festo link |
|---|---|---|---|
| Buy | 6682 | OS-1/4-B shuttle valve, G1/4 | Festo |
Pneumatic Actuator
Spring-return cylinder. G1/8 ports — requires G1/4 → G1/8 adapter. Max operating pressure: 10 bar (0.4-10 bar for 50mm bore).
| Status | Part No. | Description | Festo link |
|---|---|---|---|
| Reuse | 8084714 | ADN-S-50-45-I-P-A, bore 50 mm, stroke 45 mm, G1/8, 0.4-10 bar | Festo |
Datasheet (local): adn-s-enus.pdf
Compression Fittings
| Status | Part No. | Qty | Description | Festo link |
|---|---|---|---|---|
| Buy | 2029 | ~15 | CK-1/4-PK-4 straight, G1/4 → tube 6 mm (all valve ports, NPFC-T ports, and general connections) | Festo |
| Buy | 8030236 | 2 | NPFC-T-3G14-F threaded T-adapter, 3× G1/4 female (split to parallel valves + merge outputs). Each port needs a CK-1/4 fitting. | Festo |
| Buy | 4469 | 1 | LCK-1/8-PK-4 elbow, G1/8 → tube 6 mm (actuator connection) | Festo |
| Buy | — | 1 | G1/4 female → G1/8 male adapter (actuator port) | TODO: find part number |
Note: CK-1/4 qty increased from ~10 to ~15. The 6 extra fittings are for the NPFC-T threaded ports (3 ports × 2 T-adapters = 6 CK fittings).
Change: TCK-1/4-PK-4 (4487) replaced by NPFC-T-3G14-F (8030236). The TCK was a push-in T-fitting; the NPFC-T is a threaded T-adapter that accepts CK compression fittings at each port, giving a more secure connection.
Datasheets (local):
Silencers
On exhaust ports of all valves and the actuator exhaust.
| Status | Part No. | Qty | Description | Festo link |
|---|---|---|---|---|
| Buy | 2316 | 3 | U-1/4 silencer, G1/4 (EBS valve + VPPM exhaust + ASB valve exhaust) | Festo |
| Buy | 2307 | 1 | U-1/8 silencer, G1/8 (actuator exhaust port) | Festo |
Datasheet (local): 2316datasheet.pdf
Cables & Connectors
| Status | Part No. | Qty | Description | Festo link |
|---|---|---|---|---|
| Buy | 542256 | 1 | NEBU-M12W8-K-2-N-LE8, M12 8-pin shielded cable (VPPM control) | Festo |
| Check | 541333 | 2 | NEBU-M8G3-K-2.5-LE3, M8 3-pin cable (pressure sensors) | Festo |
| Buy | 8030801 | 1 | Solenoid coil for ASB valve (VUVS-LT25) | Festo |
| Buy | 151687 | 2 | MSSD-EB connector for valve coils (1× EBS + 1× ASB) | Festo |