2-041-94-4870 2041944870 FESTO Air Solenoid Valve 558370 VUVB-ST12-B52-ZH-QX-D-1T1

This is a FESTO air solenoid valve, model 558370, sold under part number 2-041-94-4870 or 2041944870, for Homag woodworking machines. It is a 5/2 bistable valve with electrical actuation and a sub-base pneumatic connection. Standard nominal flow rate is 260 L/min to 450 L/min. To confirm fit, match the valve function, flow rate, and sub-base connection against the valve you are replacing. The valve carries the VUVB-ST12-B52-ZH-QX-D-1T1 code. Send your machine model and the old valve code with your enquiry.

When a Homag machine loses consistent air control at a 5/2 valve station, the usual cause is a valve that no longer shifts cleanly or holds its bistable position. This FESTO valve, model 558370, replaces the unit at that station. It restores electrical actuation and a sub-base pneumatic connection.

The valve is a 5/2 bistable air solenoid valve with a standard nominal flow rate of 260 L/min to 450 L/min. It fits Homag machinery as a spare part. To confirm the fit, compare the 5/2 bistable function, the flow range, and the sub-base connection with the valve on your machine, and check the code VUVB-ST12-B52-ZH-QX-D-1T1 against the old unit.

Before mounting, check that the sub-base port pattern matches the valve you are removing and that the electrical actuation connection is the same. A 5/2 bistable valve holds its last position without continuous signal, so the machine keeps its air path after the signal drops. Mounting on the sub-base keeps the pneumatic lines in place.

Supply is the valve under part number 2-041-94-4870 or 2041944870, model 558370. No packing or customisation details are stated here. When you enquire, send the machine model, the old valve code, and a photo of the sub-base port pattern so the fit can be checked against the 5/2 bistable function and the 260 L/min to 450 L/min flow range.

What the specification fixes, and what it leaves to the machine:

• Bistable position holding — A 5/2 bistable function keeps the valve in its last shifted position when the electrical signal stops, so the air path stays set.
• Flow range for sizing — Standard nominal flow rate runs from 260 L/min to 450 L/min, giving you a known range to compare with the valve being replaced.
• Sub-base mounting — Pneumatic connection 1 is sub-base, so the valve mounts on a sub-base rather than inline, keeping air lines fixed during changeover.
• Electrical actuation — Actuation type is electrical, so the valve shifts by solenoid signal rather than manual or pneumatic pilot operation.
• Model identification — Model number 558370 and code VUVB-ST12-B52-ZH-QX-D-1T1 identify the valve when you check it against the old unit.
• Part number cross-check — The valve is sold under 2-041-94-4870 or 2041944870, so either number on your Homag parts list points to this unit.
• Five-port two-position function — A 5/2 function gives two flow paths across five ports, matching machines that use a five-port valve at that station.
• Homag machine fitment — The valve is a spare part for Homag machinery, so it is intended for the pneumatic valve station on those machines.

What changes on the shop floor when the right part goes back in:

• Keeps the air path set. A bistable 5/2 valve holds its last position when the signal drops, so the machine does not lose its air path between cycles.
• Known flow range to match. The 260 L/min to 450 L/min nominal flow range gives you a stated figure to compare against the valve you are replacing.
• Mounts on the existing sub-base. Sub-base connection means the valve sits on the sub-base, so the pneumatic lines stay in place during the swap.
• Electrical shift, no manual reset. Electrical actuation shifts the valve by signal, so the operator does not reset it by hand after each machine cycle.
• Two part numbers, one valve. The valve is sold under 2-041-94-4870 or 2041944870, so either number on your parts list identifies the same unit.
• Code match against the old unit. The VUVB-ST12-B52-ZH-QX-D-1T1 code and model 558370 let you check the replacement against the valve coming off.
• Fit confirmed before dispatch. Send the machine model, old valve code, and sub-base photo, and the 5/2 bistable function and flow range can be checked first.
• It fits the machine you already run. The valve is made for woodworking machines, so it returns to the same shaft, bracket or spindle without re-machining the mounting.

Check the 5/2 bistable function, the 260 L/min to 450 L/min flow range, and the sub-base connection against your old valve. Also match the code VUVB-ST12-B52-ZH-QX-D-1T1 and model 558370 before ordering.

A 5/2 bistable valve has five ports and two positions and holds its last position when the electrical signal stops. The air path stays set until the next signal shifts it.

Either 2-041-94-4870 or 2041944870 identifies this valve. Quote the number on your Homag parts list and add model 558370 so the unit can be checked.

Compare the port pattern on your existing sub-base with the valve you are removing. A photo of the sub-base and the old valve code lets the fit be checked before you order.

Standard nominal flow rate is 260 L/min to 450 L/min. Compare that range with the valve on your machine to confirm it suits the air circuit.

Yes, actuation type is electrical, so the valve shifts by solenoid signal. Check the electrical connection on your machine against the valve before mounting.

Send the machine model, the old valve code, and a photo of the sub-base port pattern. That lets the 5/2 bistable function and flow range be checked against your machine.

No packing or customisation details are stated for this valve. Ask about packing and customisation when you send your enquiry with the machine model and old valve code.