| Model | Maximum Capacity | Maximum Allowable Pressure | Body Material | Maximum Operating Pressure |
Connection Type |
Connection Size |
| 310 | 1,050 lb/hr (476 kg/hr) |
770 psig @ 700°F (48 bar @ 371°C) |
ASTM A105 Forged Steel | 400 psig (27.5 bar) |
Screwed, Socketweld, Flanged |
1/2″ (15 mm) 3/4″ (20 mm) |
| 312 | 3,500 lb/hr (1,588 kg/hr) |
600 psig @ 700°F (41 bar @ 371°C) |
ASTM A105 Forged Steel, Cast 316 Stainless Steel | 600 psig (41 bar) |
Screwed, Socketweld, Flanged |
1/2″ (15 mm) 3/4″ (20 mm) 1″ (25 mm) |
| 313 | 4,400 lb/hr (1,996 kg/hr) |
1,080 psig @ 700°F (74 bar @ 371°C) |
ASTM A105 Forged Steel, Cast 316 Stainless Steel | 650 psig (45 bar) |
Screwed, Socketweld, Flanged |
1/2″ (15 mm) 3/4″ (20 mm) 1″ (25 mm) |
| 314 | 6,900 lb/hr (3,130 kg/hr) |
1,130 psig @ 700°F (78 bar @ 371°C) |
ASTM A105 Forged Steel, Cast 316 Stainless Steel | 650 psig (45 bar) |
Screwed, Socketweld, Flanged |
1″ (25 mm) 1-1/4″ (32 mm) |
| 315 | 11,000 lb/hr (4,990 kg/hr) |
1,015 psig @ 700°F (70 bar @ 371°C) |
ASTM A105 Forged Steel, Cast 316 Stainless Steel | 650 psig (45 bar) |
Screwed, Socketweld, Flanged |
1″ (25 mm) 1-1/4″ (32 mm) 1-1/2″ (40 mm) |
| 316 | 20,000 lb/hr (9,072 kg/hr) |
1,100 psig @ 700°F (76 bar @ 371°C) |
ASTM A105 Forged Steel, Cast 316 Stainless Steel | 650 psig (45 bar) |
Screwed, Socketweld, Flanged |
1-1/2″ (40 mm) 2″ (50 mm) |
300 Series in forged carbon steel traps for vertical installation, with a choice of screwed, socket weld or flanged connections.
A unique leverage system multiplies the force provided by the bucket to open the valve against system pressure. The mechanism is free-floating and has no fixed pivots to create wear or friction.
Because the mechanism is located at the top of the trap, no dirt can collect on the orifice. Small particles of dirt are held in suspension until discharged by the full differential purging action when the bucket sinks, pulling the valve off the seat.
The discharge orifice is surrounded by a water seal, which prevents live steam loss. Automatic air venting is provided by a small vent hole in the bucket, which provides continuous automatic air and CO2 venting at steam temperature.
Inverted bucket traps drain continuously, although discharging intermittently, allowing no condensate backup. They are also resistant to water hammer.
