|
ND |
NP | Class | Type of Connection | Body Material | ||||
| Steel | Alloy steel | Stainless steel | Duplex |
Super Duplex |
||||
| 50 - 750 | 20 - 420 | 150# - 2 500 # | Welded ends/ Flange | x | x | x | x | x |
The closing is done by a Disc which turns around a slightly tilted axis. There is only one unique Seat.
In normal use, the valve is open because of the fluid’s action. The Disc remains however, in the fluid’s canal pump flow.
The openings pressure level is very low, on the other hand.
Exists also in Pressure Seal Cover technology.
| Body & Bonnet | A 216 WCB | A 217 WC6 | A 217 WC9 | A 351 CF8M |
| Seat | Stellite / AISI 316 / AISI 410 | |||
| Disc | Stellite / AISI 316 / AISI 410 | |||
| Stem | AISI 420 | AISI 316 | ||
| Stud Bolt | A 193 Gr B7 | A 193 Gr B16 | A 193 Gr B8 CL 2 | |
| Screw | A 194 Gr 2H | A 194 Gr 4 | A 194 Gr 8 | |
| Gasket | 150#: graphite 300#: Spiral wound stainless steel / graphite 600#: RTJ | |||