Each blowing station on a Sidel Series 2 (S2) or S2+ blow molder uses a set of valves to control preblow, blow, air recovery and exhaust. These valves cycle for every bottle, so their seals, pistons and pilot valves are among the most frequently replaced parts on the machine. UM supplies complete valves, the parts to rebuild them and a rebuild service.
UM supplies preblow, blow and exhaust valves for Series 2 and S2(H) machines, and preblow, blow, recovery and exhaust valves for S2+ machines. On both series, UM adapter plates let you fit standard MAC pilot valves, which are easier to source than the original pilot valves.
UM stocks the parts needed to rebuild S2 and S2+ valves on site: improved S2 valve maintenance kits, piston kits, seal kits, piston rods and hardened 440C stainless steel valve balls.
Send your worn valves to UM and we will rebuild them with new seals and wear parts, ready to reinstall. Keeping a set of rebuilt valves on the shelf lets you swap valves during a planned stop instead of rebuilding them with the machine down.
Identify the machine series (S2, S2(H) or S2+) and the valve function: preblow, blow, recovery or exhaust. The OEM part number or a photo of the valve and its label is usually enough to confirm the right valve or kit.
Click a reference to open it in our catalog and add it to your cart.
S2 and S2+ machines use different valve assemblies, and S2+ machines include a recovery valve. Confirm the series and the valve function with the OEM part number or a photo before ordering.
Yes. UM supplies maintenance kits with pistons, seals and hardware for on-site rebuilds, and can rebuild valves you send to our plant.
Common signs are air leaking at the exhaust, slow or inconsistent switching, and differences in bottle quality between stations. Worn seals and pistons are the most frequent cause, and contaminated air speeds up the wear.
Send us an OEM part number, a drawing, a photo or a sample and our team will confirm availability and compatibility.