DELVAL
SERIES 51/53 LARGE DIAMETER RESILIENT SEATED
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✔ 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-LOK® peroxide cured seat
✔ Double molded O-rings provide upper and lower secondary seals
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➤ Series 51 Body Style → Wafer
➤ Series 53 Body Style → 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)
➤ Design Standard → API 609, BS EN 593
➤ Testing Standard → API 598, BS EN 12266-1