DelVal Series 51/53
Large Diameter Resilient Seated Butterfly Valves
| 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) |
| Design Standard | API 609, BS EN 593 |
| Testing Standard | API 598, BS EN 12266-1 |
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-LOK® peroxide cured seat
- Double molded O-rings provide upper and lower secondary seals
