Welch · Gas ballast valve
S3298-99
short gas ballast mouth
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.
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As printed in the source
45 | short gas ballast mouth | 1 | S3298-99
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 48
12 · Gas ballast and relief valves
- Gas Ballast Valve RingS3014-99
- Gas Ballast KnobS3015-99
- Gas Ballast Location BushS3163-99
- Anti-Suck Back SpringS3166-99
- short gas ballast mouthS3298-99
- Gas ballast valve bushS3300-99
- SpringS3305-99
- Long gas ballast mouthS3432-99
- Exhaust Valve PlateS3449-99
- Vane springS3456-99
- Oil Pump ValveS3471-99
Our drawing of the machine type, with the CRVpro 48'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 45 · Exploded viewmanual crvpro 48 65 gm 6 16 2020, p. 40
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.