| Subject/Item |
Design and Material Requirement |
Material |
MDS |
EDS |
| BODY/BONNET |
Split body, bolted |
A890 J93404 A182 S32750 |
D56 D54 |
|
| INSIDE TRIM |
Bi-directional sealing (by seal on both sides of ball). Designed for simultaneous full pressure on both sides of closed valve with no pressure in cavity. Cavity relief by seat "leakage" to inside of valve |
|
|
|
| PORT |
Full bore |
|
|
|
| STEM |
|
A182 S32750 |
D54 |
|
| CLOSURE MEMBER |
Trunnion mounted ball (solid) |
A182 S32750 |
D54 |
|
| SEATS |
Seat ring with soft seat insert; Insert material to be suitable for full pressure and temperature rating. Material according to EDS |
A182 S32750 |
D54 |
NSS1 |
| SPRINGS |
|
UNS N0625 UNS N10276 |
|
|
| SEALS |
Lip seal/o-ring design and fire seal or packed gland for stem sealing |
|
|
|
| LIP SEAL |
Material according to EDS |
|
|
NSM1 |
| O-RING |
Material according to EDS |
|
|
NSM1 |
| FIRE SEAL |
Expanded graphite not less than 98% purity |
|
|
|
| OUTSIDE TRIM |
Cavity external bleed plug of anti-blowout design |
|
|
|
| BOLTING |
Material according to EDS |
|
|
NBO2 |
| SPECIAL REQUIREMENTS |
Wetted parts suitable for sour service to NACE MR0175 |
|
|
|