Elite Flow Control’s API 602 Forged Steel PSB (Pressure Seal Bonnet) Globe Valves represent the pinnacle of high-pressure flow control engineering, purpose-built for the most demanding throttling and isolation applications where standard bolted bonnet designs cannot meet the extreme sealing requirements of critical process systems.
The defining feature of the PSB Globe Valve is its self-energising Pressure Seal Bonnet – a design where the sealing force on the bonnet gasket increases proportionally with rising line pressure. This eliminates the risk of bonnet leakage under extreme operating conditions, making these valves the preferred specification for ultra-high-pressure steam systems, power generation plants, refineries, and critical petrochemical services where absolute sealing integrity is non-negotiable.
Available in pressure classes of 1500LB and 2500LB, and offered in both SW(NPT) and RTJ end connection configurations, these globe valves provide the installation flexibility required across the full range of high-pressure piping systems. The OS&Y rising stem design ensures immediate open/close visual indication at all times, while the flexible graphite packing and SS304/SS316 seal ring deliver superior stem sealing performance across extreme temperature and pressure ranges.
Constructed from a comprehensive selection of ASTM-standard materials – including carbon steel, low-temperature carbon steel, stainless steel, duplex stainless steel, and alloy steel – these valves can be precisely specified to meet virtually any process fluid, temperature, or environmental requirement.
Key Features:
- Pressure Seal Bonnet – sealing performance increases with line pressure
- Available in 1500LB and 2500LB pressure classes
- SW(NPT) and RTJ end connections
- NPT end configuration also available
- OS&Y rising stem for clear open/close visual indication
- SS304/SS316 seal ring for superior high-pressure sealing
- Flexible graphite packing for extreme temperature service
- Full range of ASTM material options including carbon, stainless, duplex and alloy steel
- Size range: 1/2″ ~ 2″ (DN15 ~ DN50)
- Manufactured and tested to API 602 & ASTM Standards
Model No.: EFC-1/2GE15 Size: 1/2″ ~ 2″ (DN15 ~ DN50)
END CONNECTION TYPES
| Type | Pressure Class |
|---|---|
| NPT End | – |
| SW Pressure Seal Bonnet | 1500, 2500LB |
| RTJ Pressure Seal Bonnet | 1500, 2500LB |
MATERIAL LIST
| Part | Material Options |
|---|---|
| Body | ASTM A105+STL / ASTM A350 LF2+STL / ASTM A182 F304(L) / ASTM A182 F316(L) / ASTM A182 F51/F53 / ASTM A182 F11+STL |
| Disc | ASTM A182 F6a / ASTM A182 F6a / ASTM A182 F304(L) / ASTM A182 F316(L) / ASTM A182 F51/F53 / ASTM A182 F304+STL |
| Stem | ASTM A182 F6a / ASTM A182 F6a / ASTM A182 F304(L) / ASTM A182 F316(L) / ASTM A182 F51/F53 / ASTM A182 F304 |
| Seal Ring | SS304 / SS316 |
| Stuffing Box | ASTM A105 / ASTM A350 LF2 / ASTM A182 F304(L) / ASTM A182 F316(L) / ASTM A182 F51/F53 / ASTM A182 F304+STL |
| Bonnet | ASTM A105 / ASTM A350 LF2 / ASTM A182 F304(L) / ASTM A182 F316(L) / ASTM A182 F51/F53 / ASTM A182 F11 |
| Packing | Flexible Graphite |
| Gland | ASTM A276 410 / ASTM A276 410 / ASTM A276 304 / ASTM A276 316 / ASTM A276 316 / ASTM A276 410 |
| Gland Flange | ASTM A105 / ASTM A350 LF2 / ASTM A182 F304 / ASTM A182 F304 / ASTM A182 F304 / ASTM A105 |
| Eyebolt | ASTM A193 B7 / ASTM A320 L7 / ASTM A193 B8(M) / ASTM A193 B8(M) / ASTM A193 B8M / ASTM A193 B16 |
| Nut | ASTM A194 2H / ASTM A194 4 / ASTM A194 8(M) / ASTM A194 8(M) / ASTM A194 8M / ASTM A194 4 |
| Stem Nut | ASTM A276 420 (all material classes) |
| Handwheel | ASTM A197 |
| Name Plate | SS304 |
DIMENSIONAL DATA
1500LB SW(NPT) & RTJ, Standard Port, Pressure Seal Bonnet
| Parameter | Unit | 15(1/2) | 20(3/4) | 25(1) | 32(1¼) | 40(1½) | 50(2) | |
|---|---|---|---|---|---|---|---|---|
| Ød (Flow Passway) | mm | 11 | 13 | 18 | 23 | 28 | 33 | |
| L Face to Face | SW(NPT) | mm | 140 | 140 | 140 | 178 | 178 | 216 |
| L Face to Face | RTJ | mm | 216 | 229 | 254 | 279 | 305 | 371 |
| H (Open Height) | mm | 220 | 220 | 240 | 258 | 290 | 337 | |
| ØW (Handwheel) | mm | 200 | 200 | 200 | 280 | 280 | 300 | |
| Weight | SW(NPT) | kg | 11.5 | 10.8 | 10.5 | 19.6 | 21.1 | 55.4 |
| Weight | RTJ | kg | 15.6 | 17.3 | 19.6 | 28.5 | 33.4 | 79.2 |
2500LB SW(NPT) & RTJ, Standard Port, Pressure Seal Bonnet
| Parameter | Unit | 15(1/2) | 20(3/4) | 25(1) | 32(1¼) | 40(1½) | 50(2) | |
|---|---|---|---|---|---|---|---|---|
| Ød (Flow Passway) | mm | 11 | 14 | 18 | 25 | 28 | 35 | |
| L Face to Face | SW(NPT) | mm | 186 | 186 | 186 | 232 | 232 | 272 |
| L Face to Face | RTJ | mm | 264 | 273 | 308 | 352 | 387 | 454 |
| H (Open Height) | mm | 333 | 333 | 333 | 410 | 420 | 524 | |
| ØW (Handwheel) | mm | 200 | 200 | 200 | 280 | 280 | 300 | |
| Weight | SW(NPT) | kg | 12.3 | 11.6 | 10.8 | 26.0 | 28.4 | 60.3 |
| Weight | RTJ | kg | 18.9 | 22.1 | 23.8 | 43.5 | 50.8 | 96.3 |
