Sealing ANSI Process Pumps.
ANSI B73.1 process pumps cover the bulk of chemical-plant rotodynamic service: Goulds 3196, Flowserve Durco Mark 3, Sulzer ZF, Sundyne LMV. Sealing these pumps is the most documented application in industrial sealing — and the AST60 cartridge is built specifically to drop into the standard ANSI gland envelope.
01The equipment
What an ansi process pumps actually is.
An ANSI B73.1 pump is a horizontal end-suction centrifugal pump built to the dimensional standard ANSI/ASME B73.1 — the dominant US chemical-plant pump standard. The seal chamber dimensions and bolt patterns are standardized, which means any B73.1-compatible cartridge seal drops into any B73.1 pump.
02Failure modes
Why sealing this equipment is hard.
- 01
API plan support for varied process service
ANSI pumps see every API piping plan from 11 (self-flush) to 53C (high-pressure barrier). The seal must support the plan without separate gland purchase. The AST60 ships with the appropriate gland tap configuration.
- 02
Stuffing-box misalignment from thermal growth
Hot service grows the casing differentially. A self-aligning gland tolerates 0.020-inch box-to-shaft misalignment without face damage; a rigid gland fails.
- 03
Zero-emission compliance for VOC service
EPA NESHAP and state air-permit programs require pressurized barrier seals on toxic-organic service. The AST60-API53A is built to that specification.
- 04
Cartridge insertion to minimize MTTR
Mean time to repair on a pump seal is dominated by setting clip and gland alignment. Cartridge insertion eliminates both — average documented changeout is 38 minutes.
03Recommended series
What we ship for ansi process pumps.
04Industries that use this equipment
Where you'll find ansi process pumps in production.
05Engineering FAQ
What plant engineers ask before specifying.
ANSI Process Pumps · sized in 24 hours
Get a sized seal recommendation for your ansi process pumps.
Send shaft size, OEM make and model, and the operating envelope. We respond with a sized series, materials, and pricing — typically within one business day.