Welch · Gas ballast valve
S3012-99
Gas Ballast Valve Rod
Where to get it
No supplier lists this number with us yet. Ask for a quote and a specialist finds price and availability for you.
Prices are the supplier’s own, as last checked (date shown); they buy and ship. A price older than 30 days isn’t shown.
As printed in the source
20 | Gas Ballast Valve Rod | 1 | S3012-99 | S3012-99 | S3012-99
Fits 1 model
As listed by WelchWhen ordering, give the model and serial number from the nameplate: some parts changed within a model’s life.
Where it sits
In the CRVpro 4
13 · Gas ballast and relief valves
- Gas Ballast Valve BushS3011-99
- Gas Ballast Valve RodS3012-99
- Gas Ballast Location BushS3013-99
- Gas Ballast Valve RingS3014-99
- Gas Ballast KnobS3015-99
- Anti-Suck Back SpringS3016-99
- Exhaust Valve PlateS3042-99
- SpringS3044-99
- Gas Ballast Valve HeadS3045-99
- Oil Pump ValveS3049-99
Our drawing of the machine type, with the CRVpro 4's own parts; this part is highlighted. Side view along the shaft. Oil-free (dry) pumps have no exhaust box oil, sight glass or oil filter; their exhaust filter is a dust filter.
In the manufacturer’s drawings
- Position 20 · Exploded viewoperation manual crv pro 4 6 8, p. 16
Part number, name and fitment as published by Welch (source), retrieved 2026-10-19. Vac & Air is independent and not affiliated with the manufacturers shown; names and numbers identify the parts only.