| Subject/Item |
Design and Material Requirement |
Material |
MDS |
EDS |
| BODY/BONNET |
Split body, bolted |
ASTM A351 CK-3MCuN A182 F44 |
R16 R14 |
|
| 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 |
Reduced bore |
|
|
|
| STEM |
|
A182 F44 |
R14 |
NIP1 |
| CLOSURE MEMBER |
Trunnion mounted ball (solid) |
A182 F44 |
R14 |
NIP1 |
| SEATS |
Seat ring with soft seat insert; Insert material to be suitable for full pressure and temperature rating. Material according to EDS |
A182 F44 |
R14 |
NIP1 NSS1 |
| SPRINGS |
|
UNS N0625 |
|
|
| 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 |
|
|
|