1-833-DELVAL1

Series 51/53 Large Diameter Resilient Seated

Body Style

Series 51 – Wafer

Series 53 – U Section Wafer (lugs drilled not tapped)

Body

CI, DI, CS

Disc

Nylon Ductile Iron (NDI)

Aroxy Ductile Iron (ADI)

CF8M

Stem

410 SS, 316 SS, CS BS 970

Seat

EPDM

Buna-N

FKM

Silicone

Size Range

26" to 40“ (DN 650 to 1000)

Pressure Rating

150 PSIG (PN 10)

Leakage Class

Class VI

Design Standard

API 609, BS EN 593

Testing Standard

API 598, BS EN 12266-1

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Features

  • ISO 5211 top plate for direct mounting of a wide range of actuators, handles, and gears
  • Heavy duty bronze sleeve bearing reduces friction and torque
  • High strength disc with hand polished disc edge and hubs
  • Thick bronze bushing absorbs actuator side thrusts
  • Bronze vertical thrust bearing eliminates disc displacement due to weight of stem and disc
  • Blowout proof stem retention offers easy assembly and disassembly
  • Bi-directional U-cup stem seal
  • Heavy duty, one-piece epoxy coated body
  • Center-LOKĀ® peroxide cured seat
  • Double molded O-rings provide upper and lower secondary seals