Cyclone Separators

API Plan 31 Seal Filtration System

Flexaseal Cyclone Separators efficiently remove abrasive media from a pump’s discharge, circulating the resulting clean fluid back into the seal chamber to cool the seal faces.

The simple construction of the Flexaseal Cyclone Separator utilizes a one-piece pressure casing, eliminating the temperature and pressure constraints imposed by bolted and gasketed casing cover designs. This unit also aligns with API 682 Plans 31 and 41.

API Plan 31 Seal Filtration System


API Plan 31 Cyclone Separators include:

  • 4 Sizes to cover a wide range of flush flow rates
  • 1/2″ FNPT process connections
  • Billet construction for high-pressure boundary integrity and long life
  • Up to 3000 psig (207 bar) MAWP
  • Delivery: IN STOCK


Materials of Construction

One-piece Casing
006: Nylon
007, 008, 009: Stainless Steel, Duplex Stainless Steel, Super Duplex Stainless Steel, Monel®
007: Tungsten
008: Stellite
009: Stellite / Stainless Steel
Operating Pressures
006: up to 650 psi (45 bar)
007, 008, 009: up to 3000 psi (207 bar)


For more information on API Plan 31 Cyclone Separators

Quote Request

Depending on your specific needs and application, Flexaseal can help you identify the ideal products. Contact us to tell us about your needs and request a quote.