Features
411G vertical mount and 421 horizontal mount forged steel bucket traps meet the needs of lower displacement under high pressure differentials.
Materials
Valve body, valve cover: A105/F11
Valve seat: Martensitic stainless steel
Valve disc: Martensitic stainless steel
Other internal parts: stainless steel
| Selection | Restrictions (Alloy) | Restrictions (forged steel) | Installation Instructions |
| •Built-in stainless steel check valve (CV) •Built-in check valve is stainless steel spring loaded and threaded onto the extended inlet pipe which has a fitting at the top. The built-in check valve may reduce displacement slightly. | • Design pressure (PMA): 160bar • Maximum operating pressure (PMO): 69bar • Maximum operating temperature (TMO): 475℃ | • Design pressure (PMA): 160bar • Maximum operating pressure (PMO): 69bar • Maximum operating temperature (TMO); 371°C | Keep the valve body vertical during installation to ensure vertical up and down movement of the bucket. |
| Operation in overheating condition | For superheated steam |
| Under normal working conditions, what generally enters the inverted bucket steam trap is saturated steam and condensate. Superheated steam may also enter, but its speed is basically equal to the condensation speed of steam in the valve. Therefore, regardless of the superheat, the steam trap is always at saturated temperature (or slightly lower). | Do not oversize the orifice; limiting the orifice size is advisable. Specific ground discs and seats, as well as extended inlet pipes and check valves. Provide a header pipe of sufficient diameter and length. Provide sufficient length of inlet pipe to keep the trap below the main line. Do not insulate the trap or inlet pipe. |
Technical Parameters
| model | 411G | 421 | |
| Connection Type | Threaded, socket welded, fabricated flanges | ||
| Installation | vertical | level | |
| Maximum working pressure difference (PMX) | (A) | 41bar | |
| (B) | 69bar | ||
Dimensions/Weight (approximate) mm and Kg
| model | 411G(F) | 421(F) | |||||
| Nominal diameter | 15 | 20 | 25 | 15 | 20 | 25 | |
| A(mm) | 224 | 203 | |||||
| A1(mm) | 354 | 300 | |||||
| B(mm) | 160 | ||||||
| K(mm) | 19 | / | |||||
| Weight(Kg) | welding | 10 | 12 | ||||
| Flange | 14 | 15 | |||||
Please specify the following when ordering:
Model
Nominal diameter
Minimum and maximum working pressure difference
Connection method and standard
Options
