Type 9 and Type 21 Seals
Type 9 or Type 21 mechanical seal — which does your pump need? Our guide explains how each seal works, when to use each, and how to choose the right replacement for your pump.
Flush and Quench
API Plan 11 flush and API Plan 62 quench protect mechanical seals from different failure modes. Learn when to specify each, what API 682 requires, and how proper seal support extends pump life.
Acceptable Seal Leakage
Is your pump seal leaking? Before you replace it, understand what normal mechanical seal leakage looks like, what acceptable leak rate is, and what actually causes premature seal failure — from Price Pump’s engineering experts.