Sentinel Model S-8A is an extremely economical, but hand cast aluminum spring type thief hatch with an 8" round opening and standard A.P.I. 16 hole bolt circle with a lock type latch.  Vacuum is .4 Oz. and the standard pressure configuration includes a 4 Oz. pressure spring and sponge EPDM or neoprene base gasket.

  • Optional 2,6,8,10, 12 or 16 Oz. pressure spring
  • Customized nameplate/company logo available (No setup charge on orders of 50+)
  • Specialty gaskets and coatings for sour service
  • Optional ANSI 8 hole bolt circle base
  • Nuts & bolts available
  • Neoprene, Viton or specialty gaskets available





 SCHEMA #
 DESCRIPTION
 1Base, cast aluminum
 2 Lid, cast aluminum
 3 Pressure valve, cast aluminum
 4 Vacuum disk, aluminum
 5 Back-up plate, aluminum
 6 Pressure gasket, neoprene (sponge Viton available)
 7 Vacuum gasket, sponge neoprene (sponge Viton available)
 8 Screws, cad. pl (2 required)
 9 Valve guide stem, aluminum
 10 Pressure spring, 4 Oz. (2,6,8,10 or 16 available), Hot drawn galvanized (Stainless available)
 11 Vacuum spring, Stainless
 12 Hinge pin
 13 Hinge pin fastener (2 required)
 14 Latch, cast aluminum
 15 Latch hinge pin

 
*
 *Viton, Urethane,  or other specialty materials upon request

Flow chart available upon request.